Suzuki Takanori
| Faculty of Science Chemistry Organic and Biological Chemistry | Professor |
| Faculty of Engineering | Professor |
Last Updated :2026/03/03
■Researcher basic information
Researchmap personal page
Home Page URL
Researcher number
- 70202132
J-Global ID
Research Keyword
Research Field
Educational Organization
- Bachelor's degree program, School of Science
- Master's degree program, Graduate School of Chemical Sciences and Engineering
- Doctoral (PhD) degree program, Graduate School of Chemical Sciences and Engineering
■Career
Career
- Apr. 2006 - Present
Hokkaido University, Faculty of Science, Department of Chemistry - Apr. 2002 - Mar. 2006
北海道大学大学院理学研究科化学専攻 教授 - Jan. 1995 - Mar. 2002
Hokkaido University, School of Science - Apr. 1989 - Dec. 1994
Tohoku University, Faculty of Science, Department of Chemistry - Apr. 1988 - Mar. 1989
JSPS PD (東北大学理学部化学科)
Educational Background
Committee Memberships
- Apr. 2011 - Present
有機π電子系学会, 幹事, Society - Sep. 2010 - Present
基礎有機化学会, 理事, Society - Sep. 2024 - Sep. 2024
第34回基礎有機化学討論会, 実行委員長 - Sep. 2022 - Aug. 2024
基礎有機化学会 会長 - Aug. 2019 - Aug. 2024
International Symposium on Novel Aromatic Compounds (ISNA) International Advisory Board 国際諮問委員会 会長 - Jul. 2019 - Jul. 2019
第18回新芳香族化学国際会議 組織委員長, Society - Oct. 2007 - Oct. 2007
第37回構造有機化学討論会 実行委員長, Society
■Research activity information
Awards
Papers
- Dual-State Mechano- and Electrochromic Responses Enabled by Sterically Strained Diazaanthraquinodimethanes
Karin Noro, Ayano Tani, Tomoki Tadokoro, Takashi Harimoto, Kazuma Sugawara, Takanori Suzuki, Toshikazu Ono, Yusuke Ishigaki
The Journal of Organic Chemistry, 12 Sep. 2025, [Peer-reviewed]
Scientific journal - Isolation of a Transition-State Geometry via Intermolecular Stabilization in the Solid State
Yusuke Ishigaki, Saki Kikuchi, Tomoki Tadokoro, Kazuma Sugawara, Takanori Suzuki
Organic Letters, 15 Aug. 2025, [Peer-reviewed], [Invited], [Last author, Corresponding author]
Scientific journal - Ring Cleavage for Ring Construction: Oxidative Heterocyclic Segregation toward Tribenzophenanthrolines
Takanori Suzuki, Kota Asai, Takeru Saito, Johnny Hu, Takuya Shimajiri, Yusuke Ishigaki
Chemistry – A European Journal, 31, 42, Wiley, 25 Jun. 2025, [Peer-reviewed], [Invited], [Lead author, Corresponding author]
Scientific journal, Abstract
Intramolecular double C─N bond formation followed by deselenylation enables a one‐pot skeletal editing of selenadiazole‐fused naphthoquinodimethanes into previously unknown tribenzophenanthroline derivatives, which serve as precursors to fluorescent metal complexes. This transformation involves the disappearance of the original selenadiazole ring containing two nitrogen atoms and the concurrent formation of two new pyridine rings, each containing a single nitrogen atom. This “heterocyclic segregation (Het‐Seg)” reaction is triggered by two‐electron oxidation of sterically congested quinodimethane substrates with a folded geometry. The resulting twisted dicationic intermediates are crucial for driving the unique skeletal reorganization. - Mechanism for expansion or contraction of extremely elongated C–C single bond by substituents: “seesaw” principle in bis(dibenzocycloheptatriene)s
Soki Kawaguchi, Takuya Shimajiri, Yuta Kawakami, Yusuke Ishigaki, Takanori Suzuki
Bulletin of the Chemical Society of Japan, 30 May 2025, [Peer-reviewed], [Last author, Corresponding author]
Scientific journal - Diverse redox-mediated transformations to realize the para-quinoid, σ-bond, and ortho-diphenoquinoid forms
Takashi Harimoto, Moto Kikuchi, Takanori Suzuki, Yusuke Ishigaki
Nature Communications, 08 May 2025, [Peer-reviewed]
Scientific journal - A Light‐Driven Electrochromic Materials‐Based Nanomotor for H2S‐Controlled Drug Release in Synergistic Cancer Chemotherapy Immunotherapy
Luyan Wu, Xiang Cao, Yusuke Ishigaki, Qiang Tong, Fangqi Yang, Huihui Lin, Takanori Suzuki, Quli Fan
Angewandte Chemie International Edition, 64, 22, Wiley, 02 Apr. 2025, [Peer-reviewed], [Corresponding author], [Internationally co-authored]
Scientific journal, Abstract
Nanomotors hold tremendous potential for drug delivery. However, current nanomotors face limitations that compromise efficiency of drug utilization, including the use of inorganic materials with suboptimal soft interface and biocompatibility, uncontrollable drug release, insufficient directional control, and slow movement speeds. Herein, we present a novel near‐infrared (NIR) light‐driven porous unsymmetric nanomotor with ultrafast motion, which utilizes hydrogen sulfide (H2S)‐responsive cationic organic π‐electron structure‐based electrochromic material (F12+) for the payload and controlled release of anionic anticancer drugs, enabling synergistic cancer chemotherapy and immunotherapy. We demonstrate that the nanomotor can precisely target tumors driven by thermophoresis, tumor‐targeting peptide (RGD), and H2S (highly expressed in tumors and acted as chemoattractants), which induces chemotactic behavior to guide nanomotors into tumors. Once in the tumors, the cationic F12+ is reduced to the diene F2 upon reaction with H2S, activating the nanomotor's NIR fluorescence for real‐time monitoring of drug delivery and release in vivo. Upon exposure to H2S, the nanomotor undergoes disassembly due to the disruption of electrostatic interactions between the anionic anticancer drugs and the cationic F12+, leading to the precise and controlled drug release, ensuring uniform distribution across the tumor. This innovative strategy would open avenues for delivering mRNA vaccines or other anionic drugs. - Toward the molecular rectifier: synthesis and redox properties of donor–acceptor dyad with a disulfide terminal group
Wataru Nojo, Yusuke Ishigaki, Kyosuke Sakai, Takanori Fukushima, Takanori Suzuki
Canadian Journal of Chemistry, 22 Mar. 2025, [Peer-reviewed], [Invited], [Last author, Corresponding author]
Scientific journal - Gold(I)‐catalyzed Synthesis of Axially Chiral Indolo[2,3‐c]carbazole Exhibiting Advanced Electrochromic Response
Takanori Suzuki, Wataru Nojo, Yuiki Kawada, Soichiro Sugiyama, Takaya Ikeuchi, Yusuke Ishigaki, Hiroaki Ohno
Asian Journal of Organic Chemistry, Mar. 2025, [Peer-reviewed], [Invited], [Lead author, Corresponding author]
Scientific journal - A redox reaction triggered by hydrostatic pressure in dicationic cyclophanes
Moto Kikuchi, Tomoya Kuwabara, Gaku Fukuhara, Takanori Suzuki, Yusuke Ishigaki
Materials Chemistry Frontiers, 2025, [Peer-reviewed]
Scientific journal - Femtomolar hydrogen sulfide detection via hybrid small-molecule nano-arrays
Xing Xing, Luyan Wu, Yuchen Zhang, Jiahao Pan, Yusuke Ishigaki, Huaqing Xie, Takanori Suzuki, Deju Ye, Jianhua Zhang, Weihua Zhang, Zhenda Lu
Nature Communications, 30 Dec. 2024, [Peer-reviewed], [Internationally co-authored]
Scientific journal - Direct evidence for a carbon–carbon one-electron σ-bond
Takuya Shimajiri, Soki Kawaguchi, Takanori Suzuki, Yusuke Ishigaki
Nature, Springer Science and Business Media LLC, 25 Sep. 2024, [Peer-reviewed]
Scientific journal - Structural‐Change‐Induced Two‐Stage Redox Behavior of Pentacenebisquinodimethane with Tricolor Chromism
Yusuke Ishigaki, Shin‐ichi Mizuno, Takashi Harimoto, Takuya Shimajiri, Takanori Suzuki
Chemistry – An Asian Journal, 02 Sep. 2024, [Peer-reviewed], [Last author, Corresponding author]
Scientific journal - Cation‐Stacking Approach Enabling Interconversion between Bis(xanthylium) and its Reduced Species
Moto Kikuchi, Tomoki Tadokoro, Takuya Tachibana, Shuichi Suzuki, Takanori Suzuki, Yusuke Ishigaki
Chemistry – A European Journal, 22 Aug. 2024, [Peer-reviewed]
Scientific journal - Thermal Equilibrium Between Quinoid/Biradical Forms Enhancing Electrochemical Amphotericity
Yusuke Ishigaki, Shin‐ichi Mizuno, Kazuma Sugawara, Takumi Hashimoto, Shuichi Suzuki, Takanori Suzuki
Chemistry – A European Journal, 20 Jun. 2024, [Last author, Corresponding author]
Scientific journal - Synthesis and chiroptical properties of cyclic anthraquinodimethane dimer using Au-templated method
Soichiro Sugiyama, Kazuharu Murotani, Fumitaka Ishiwari, Akinori Saeki, Hidetoshi Kawai, Takanori Suzuki, Yoshitaka Tsuchido, Yusuke Ishigaki
Chemistry Letters, 01 Jun. 2024, [Peer-reviewed]
Scientific journal - Crystallographic and spectroscopic studies on persistent triarylpropargyl cations
Takuya Shimajiri, Taiga Tsue, Shumpei Koakutsu, Yusuke Ishigaki, Takanori Suzuki
Chemical Communications, 2024, [Peer-reviewed], [Last author, Corresponding author]
Scientific journal - Smart Lipid Nanoparticle that Remodels Tumor Microenvironment for Activatable H2S Gas and Photodynamic Immunotherapy
Luyan Wu, Yili Liu, Wenhui Zeng, Yusuke Ishigaki, Sensen Zhou, Xingxing Wang, Yidan Sun, Yan Zhang, Xiqun Jiang, Takanori Suzuki, Deju Ye
Journal of the American Chemical Society, 20 Dec. 2023, [Peer-reviewed], [Corresponding author], [Internationally co-authored]
Scientific journal - On-Surface Synthesis of Multiple Cu Atom-Bridged Organometallic Oligomers
Kewei Sun, Kazuma Sugawara, Andrey Lyalin, Yusuke Ishigaki, Kohei Uosaki, Oscar Custance, Tetsuya Taketsugu, Takanori Suzuki, Shigeki Kawai
ACS Nano, American Chemical Society (ACS), 04 Dec. 2023, [Peer-reviewed], [Corresponding author]
Scientific journal - Domino‐Redox Reaction Induced by An Electrochemically Triggered Conformational Change
Takashi Harimoto, Tomoki Tadokoro, Soichiro Sugiyama, Takanori Suzuki, Yusuke Ishigaki
Angewandte Chemie International Edition, Wiley, 28 Nov. 2023
Scientific journal, Abstract
The concept of a domino‐type reaction has been applied in a wide range of fields such as synthetic organic chemistry, material engineering, and life science. To extend the domino concept to redox chemistry, we designed and synthesized a dimeric quinodimethane (QD) with a nonplanar dithiin spacer. The domino‐redox properties can be activated by raising the temperature, based on a thermally equilibrated twisted conformation of QD, which has a higher HOMO level that is more readily oxidized. After one QD unit is oxidized (trigger), steric repulsion and electronic interaction between electrophores make the neighboring QD unit adopt a twisted conformation (domino process), which facilitates the following oxidation. Thus, a domino‐redox reaction was achieved for the first time by a change in the HOMO level due to a drastic change in the molecular conformation. - Carbon-based Biradicals: Structural and Magnetic Switching
Yusuke Ishigaki, Takashi Harimoto, Takuya Shimajiri, Takanori Suzuki
Chemical Reviews, American Chemical Society (ACS), 10 Nov. 2023
Scientific journal - Double Dynamic Structural Change Enabling Tricolor Chromism by the Realization of Apparent Two-Electron Transfer to Skip the Open-Shell State
Takashi Harimoto, Yuka Sugai, Kazuma Sugawara, Takanori Suzuki, Yusuke Ishigaki
CHEMISTRY-A EUROPEAN JOURNAL, Jul. 2023
English, Scientific journal - Chalcogen-Peierls Transition: Single-Crystal-to-Single-Crystal Transition from a Two-Dimensional to a One-Dimensional Network of Chalcogen Bonds at Low Temperature
Soki Kawaguchi, Takuya Shimajiri, Tomoyuki Akutagawa, Takanori Fukushima, Yusuke Ishigaki, Takanori Suzuki
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 96, 7, 631, 635, Jul. 2023
English, Scientific journal - One-Pot Synthesis of Helical Azaheptalene and Chiroptical Switching of an Isolable Radical Cation
Yuta Nishimura, Takashi Harimoto, Takanori Suzuki, Yusuke Ishigaki
CHEMISTRY-A EUROPEAN JOURNAL, Jul. 2023
English, Scientific journal - Crystal Engineering, Electron Conduction, and Molecular Recognition and Reactivity by Chalcogen Bonds in Tetracyanoquinodimethanes Fused with [1,2,5]Chalcogenadiazoles
Takuya Shimajiri, Henri-Pierre Jacquot de Rouville, Valérie Heitz, Tomoyuki Akutagawa, Takanori Fukushima, Yusuke Ishigaki, Takanori Suzuki
Synlett, 12 Apr. 2023
English, Scientific journal - Tripodal Triazatruxene Derivative as a Face-On Oriented Hole-Collecting Monolayer for Efficient and Stable Inverted Perovskite Solar Cells
Minh Anh Truong, Tsukasa Funasaki, Lucas Ueberricke, Wataru Nojo, Richard Murdey, Takumi Yamada, Shuaifeng Hu, Aruto Akatsuka, Naomu Sekiguchi, Shota Hira, Lingling Xie, Tomoya Nakamura, Nobutaka Shioya, Daisuke Kan, Yuta Tsuji, Satoshi Iikubo, Hiroyuki Yoshida, Yuichi Shimakawa, Takeshi Hasegawa, Yoshihiko Kanemitsu, Takanori Suzuki, Atsushi Wakamiya
Journal of the American Chemical Society, 145, 13, 7528, 7539, 22 Mar. 2023
English, Scientific journal - Enhancement of NIR‐Absorbing Ability of Bis(diarylmethylium)‐Type Dicationic Dyes Based on an Ortho ‐Substitution Strategy.
Takashi Harimoto, Takanori Suzuki, Yusuke Ishigaki
Chemistry – A European Journal, 29, 23, 16 Mar. 2023
English, Scientific journal - Bis(triarylmethylium)‐type Macrocyclic Dications: Mechanochromic Emission Extending to the Red Region
Yusuke Ishigaki, Takuya Tachibana, Kazuma Sugawara, Moto Kikuchi, Takanori Suzuki
ChemPlusChem, 88, 3, Mar. 2023
English, Scientific journal - Dibenzotropylium-Capped Orthogonal Geometry Enabling Isolation and Examination of a Series of Hydrocarbons with Multiple 14π-Aromatic Units
Yuki Hayashi, Shuichi Suzuki, Takanori Suzuki, Yusuke Ishigaki
Journal of the American Chemical Society, 145, 4, 2596, 2608, 01 Feb. 2023
English, Scientific journal - Single-Molecule Observation of Redox Reactions Enabled by Rigid and Isolated Tripodal Molecules
Yuzu Kobayashi, Yasuyuki Yokota, Raymond A. Wong, Misun Hong, Jun Takeya, Saho Osawa, Fumitaka Ishiwari, Yoshiaki Shoji, Takashi Harimoto, Keisuke Sugimoto, Yusuke Ishigaki, Takanori Suzuki, Takanori Fukushima, Yousoo Kim
Journal of Physical Chemistry C, 127, 1, 746, 758, 12 Jan. 2023
Scientific journal - Vis-NIR-Electrochromic Interconversion of Dithienylmethylium-Type Cyanine Dyes with a σ-Bonded Dimer or Isolable Neutral Radical
Su Gi Chong, Shuichi Suzuki, Takanori Suzuki, Yusuke Ishigaki
Bulletin of the Chemical Society of Japan, 96, 10, 1144, 1149, 2023
Scientific journal - Exceptionally flexible quinodimethanes with multiple conformations: polymorph-dependent colour tone and emission of crystals
Kazuma Sugawara, Toshikazu Ono, Yoshio Yano, Takanori Suzuki, Yusuke Ishigaki
Materials Chemistry Frontiers, 7, 8, 1591, 1598, 2023
English, Scientific journal - Strain‐sensitive On‐Surface Ladderization via Non‐Dehydrogenative Heterocyclization
Yujing Ma, Kazuma Sugawara, Yusuke Ishigaki, Kewei Sun, Takanori Suzuki, Shigeki Kawai
Chemistry – A European Journal, 20 Dec. 2022
English, Scientific journal - Ultralong C(sp3)–C(sp3) Single Bonds Shortened and Stabilized by London Dispersion
Takuya Shimajiri, Yusuke Ishigaki, Yuta Kawakami, Soki Kawaguchi, Yuki Hayashi, Kazuto Hada, Takanori Suzuki
Synlett, 34, 10, 1147, 1152, 11 Oct. 2022
English, Scientific journal - Geometrical and Electronic Structure of Cation Radical Species of Tetraarylanthraquinodimethane: An Intermediate for Unique Electrochromic Behavior
Yusuke Ishigaki, Reina Fukagawa, Kazuma Sugawara, Takashi Harimoto, Takanori Suzuki
Chemistry – An Asian Journal, 17, 22, e202200914, 30 Sep. 2022, [International Magazine]
English, Scientific journal - Near-Infrared Electrochromic Behavior of Dibenzothiepin Derivatives Attached by Two Michler's Hydrol Blue Units.
Yusuke Ishigaki, Masaki Takata, Takuya Shimajiri, Luyan Wu, Wenhui Zeng, Deju Ye, Takanori Suzuki
Chemistry (Weinheim an der Bergstrasse, Germany), 28, 70, 15 Sep. 2022, [International Magazine]
English, Scientific journal - A Ratiometric Photoacoustic Probe with a Reversible Response to Hydrogen Sulfide and Hydroxyl Radicals for Dynamic Imaging of Liver Inflammation
Luyan Wu, Wenhui Zeng, Yusuke Ishigaki, Junya Zhang, He Bai, Takashi Harimoto, Takanori Suzuki, Deju Ye
Angewandte Chemie International Edition, 61, 37, e202209248, 08 Aug. 2022, [International Magazine]
English, Scientific journal - Solid‐State Assembly by Chelating Chalcogen Bonding in Quinodimethane Tetraesters Fused with a Chalcogenadiazole
Yusuke Ishigaki, Kota Asai, Henri‐Pierre Jacquot de Rouville, Takuya Shimajiri, Johnny Hu, Valérie Heitz, Takanori Suzuki
ChemPlusChem, 87, 4, e202200075, Apr. 2022, [International Magazine]
English, Scientific journal - An Activatable Afterglow/MRI Bimodal Nanoprobe with Fast Response to H
2 S for In Vivo Imaging of Acute Hepatitis
Wenhui Zeng, Luyan Wu, Yusuke Ishigaki, Takashi Harimoto, Yuxuan Hu, Yidan Sun, Yuqi Wang, Takanori Suzuki, Hong Yuan Chen, Deju Ye
Angewandte Chemie - International Edition, 61, 4, e202111759, 21 Jan. 2022, [International Magazine]
English, Scientific journal - Multiple Molecular Interactions between Alkyl Groups and Dissociated Bromine Atoms on Ag(111)
Shigeki Kawai, Kazuma Sugawara, Yujing Ma, Kewei Sun, Oscar Custance, Yusuke Ishigaki, Takanori Suzuki
Physical Chemistry Chemical Physics, 24, 36, 22191, 22197, Royal Society of Chemistry (RSC), 2022, [International Magazine]
English, Scientific journal, Multiple intermolecular interactions offer a high-degree of controllability of on-surface molecular assemblies. Here, two kinds of molecular networks were formed by depositing 11,11,12,12-tetrabromo-1,4,5,8-tetraaza-9,10-anthraquinodimethane derivatives with two different alkyl groups in... - Anthraquinodimethane Ring-Flip in Sterically Congested Alkenes: Isolation of Isomer and Elucidation of Intermediate through Experimental and Theoretical Approach
Yusuke Ishigaki, Tomoki Tadokoro, Yu Harabuchi, Yuki Hayashi, Satoshi Maeda, Takanori Suzuki
Bulletin of the Chemical Society of Japan, 95, 1, 38, 46, 2022
English, Scientific journal - Chalcogen Bond versus Halogen Bond: Changing Contributions in Determining the Crystal Packing of Dihalobenzochalcogenadiazoles
Yusuke Ishigaki, Kai Shimomura, Kota Asai, Takuya Shimajiri, Tomoyuki Akutagawa, Takanori Fukushima, Takanori Suzuki
Bulletin of the Chemical Society of Japan, 95, 3, 522, 531, 2022
English, Scientific journal - Generation of hydroxyl radical-activatable ratiometric near-infrared bimodal probes for early monitoring of tumor response to therapy
Luyan Wu, Yusuke Ishigaki, Wenhui Zeng, Takashi Harimoto, Baoli Yin, Yinghan Chen, Shiyi Liao, Yongchun Liu, Yidan Sun, Xiaobo Zhang, Ying Liu, Yong Liang, Pengfei Sun, Takanori Suzuki, Guosheng Song, Quli Fan, Deju Ye
Nature Communications, 12, 1, Dec. 2021, [Peer-reviewed], [Corresponding author]
English, Scientific journal - Obituary for Professor Toshio Mukai
Hiroshi Ikeda, Takashi Hirano, Kan Wakamatsu, Takanori Suzuki, Eietsu Hasegawa
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS, 48, Sep. 2021
English - Heterocyclic Ring‐Opening of Nanographene on Au(111)
Kewei Sun, Kazuma Sugawara, Andrey Lyalin, Yusuke Ishigaki, Kohei Uosaki, Tetsuya Taketsugu, Takanori Suzuki, Shigeki Kawai
Angewandte Chemie, 133, 17, 9513, 9518, Wiley, 19 Apr. 2021
Scientific journal - Heterocyclic Ring-Opening of Nanographene on Au(111)
Sun, K., Sugawara, K., Lyalin, A., Ishigaki, Y., Uosaki, K., Taketsugu, T., Suzuki, T., Kawai, S.
Angewandte Chemie - International Edition, 60, 17, 9427, 9432, 19 Apr. 2021
English, Scientific journal - Chalcogen Bond versus Weak Hydrogen Bond: Changing Contributions in Determining the Crystal Packing of [1,2,5]-Chalcogenadiazole-Fused Tetracyanonaphthoquinodimethanes
Yusuke Ishigaki, Kota Asai, Takuya Shimajiri, Tomoyuki Akutagawa, Takanori Fukushima, Takanori Suzuki
Organic Materials, 03, 02, 090, 096, Georg Thieme Verlag {KG}, Apr. 2021
Scientific journal, The crystal structures of a series of tetracyanonaphthoquinodimethanes fused with a selenadiazole or thiadiazole ring revealed that their molecular packing is determined mainly by two intermolecular interactions: chalcogen bond (ChB) and weak hydrogen bond (WHB). ChB between Se and a cyano group dictates the packing of selenadiazole derivatives, whereas the S-based ChB is much weaker and competes with WHB in thiadiazole analogues. This difference can be explained by different electrostatic potentials as revealed by density functional theory calculations. A proper molecular design that weakens WHB can change the contribution of ChB in determining the crystal packing of thiadiazole derivatives. - Hysteretic Three-State Redox Interconversion among Zigzag Bisquinodimethanes with Non-fused Benzene Rings and Twisted Tetra-/Dications with [5]/[3]Acenes Exhibiting Near-Infrared Absorptions
Yusuke Ishigaki, Takashi Harimoto, Kazuma Sugawara, Takanori Suzuki
Journal of the American Chemical Society, 143, 9, 3306, 3311, 10 Mar. 2021
English, Scientific journal - Molecular Recognition by Chalcogen Bond: Selective Charge-Transfer Crystal Formation of Dimethylnaphthalene with Selenadiazolotetracyanonaphthoquinodimethane
Ishigaki, Y., Asai, K., de Rouville, H.-P.J., Shimajiri, T., Heitz, V., Fujii-Shinomiya, H., Suzuki, T.
European Journal of Organic Chemistry, 2021, 6, 990, 997, 12 Feb. 2021
English, Scientific journal - 9,9'-bi(xanthene)-type hexaphenylethane derivatives as advanced organic electrochromic systems
Suzuki, T., Ishigaki, Y., Takata, M., Nishida, J.-I., Fukushima, T.
Heterocycles, 102, 3, 419, 450, 2021
English, Scientific journal - Expandability of the covalent bond: A new facet discovered in extremely long C
sp3 -Csp3 single bonds
Ishigaki, Y., Uchimura, Y., Shimajiri, T., Suzuki, T.
Bulletin of the Chemical Society of Japan, 94, 4, 1385, 1393, 2021
English, Scientific journal - Redox-active tetraaryldibenzoquinodimethanes
Ishigaki, Y., Sugawara, K., Tadokoro, T., Hayashi, Y., Harimoto, T., Suzuki, T.
Chemical Communications, 57, 59, 7201, 7214, 2021
English, Scientific journal - 1,2,5]Chalcogenadiazole-fused Dicyanonaphthoquinodiimines: Larger Contribution from Chalcogen Bond than Weak Hydrogen Bond in Determining Crystal Structures#
Ishigaki, Y., Asai, K., Shimajiri, T., Suzuki, T.
Chemistry Letters, 50, 6, 1184, 1187, 2021
English, Scientific journal - 5-arylidenetetronate as a versatile electrophore for pi-extended electron acceptors
Hayashi, Y., Ishigaki, Y., Merad, J., Suzuki, T., Médebielle, M.
Heterocycles, 103, 1, 165, 171, 2021
English, Scientific journal - Flexible C−C Bonds: Reversible Expansion, Contraction, Formation, and Scission of Extremely Elongated Single Bonds
Shimajiri, T., Suzuki, T., Ishigaki, Y.
Angewandte Chemie - International Edition, 59, 49, 22252, 22257, 30 Dec. 2020
English, Scientific journal - Flexible C−C Bonds: Reversible Expansion, Contraction, Formation, and Scission of Extremely Elongated Single Bonds
Takuya Shimajiri, Takanori Suzuki, Yusuke Ishigaki
Angewandte Chemie, 132, 49, 22436, 22441, Wiley, 30 Dec. 2020
Scientific journal - H2S-activatable near-infrared afterglow luminescent probes for sensitive molecular imaging in vivo
Luyan Wu, Yusuke Ishigaki, Yuxuan Hu, Keisuke Sugimoto, Wenhui Zeng, Takashi Harimoto, Yidan Sun, Jian He, Takanori Suzuki, Xiqun Jiang, Hong-Yuan Chen, Deju Ye
Nature Communications, 11, 1, Dec. 2020, [Peer-reviewed], [Corresponding author]
English, Scientific journal - Switching of Redox Properties Triggered by a Thermal Equilibrium between Closed‐Shell Folded and Open‐Shell Twisted Species
Yusuke Ishigaki, Takumi Hashimoto, Kazuma Sugawara, Shuichi Suzuki, Takanori Suzuki
Angewandte Chemie, 132, 16, 6643, 6646, Wiley, 16 Apr. 2020
Scientific journal - Switching of Redox Properties Triggered by a Thermal Equilibrium between Closed-Shell Folded and Open-Shell Twisted Species
Ishigaki, Y., Hashimoto, T., Sugawara, K., Suzuki, S., Suzuki, T.
Angewandte Chemie - International Edition, 59, 16, 6581, 6584, 16 Apr. 2020, [Peer-reviewed]
English, Scientific journal - Hexaarylbutadiene: A Versatile Scaffold with Tunable Redox Properties towards Organic Near‐Infrared Electrochromic Material
Yusuke Ishigaki, Takashi Harimoto, Keisuke Sugimoto, Luyan Wu, Wenhui Zeng, Deju Ye, Takanori Suzuki
Chemistry – An Asian Journal, 15, 7, 1147, 1155, Apr. 2020
English, Scientific journal - Identification of synthetic inhibitors for the DNA binding of intrinsically disordered circadian clock transcription factors
Yusuke Hosoya, Wataru Nojo, Isao Kii, Takanori Suzuki, Miki Imanishi, Junko Ohkanda
Chemical Communications, 56, 76, 11203, 11206, Royal Society of Chemistry ({RSC}), 2020, [International Magazine]
English, Scientific journal, Essential components of the human circadian clock, BMAL1 and CLOCK, which are intrinsically disordered transcription factors, were expressed and subjected to a fluorescent in vitro binding assay using an E-box DNA fragment. Screening of a chemical library identified 5,8-quinoxalinedione (1), which was found to inhibit binding of the heterodimer BMAL1/CLOCK to E-box at low micromolar concentrations. - Electric-Field-Controllable Conductance Switching of an Overcrowded Ethylene Self-Assembled Monolayer
Shintaro Fujii, Masato Koike, Tomoaki Nishino, Yoshiaki Shoji, Takanori Suzuki, Takanori Fukushima, Manabu Kiguchi
Journal of the American Chemical Society, 141, 46, 18544, 18550, 20 Nov. 2019
English, Scientific journal - Photo- and Thermal Interconversion of Multiconfigurational Strained Hydrocarbons Exhibiting Completely Switchable Oxidation to Stable Dicationic Dyes
Yusuke Ishigaki, Yuki Hayashi, Takanori Suzuki
Journal of the American Chemical Society, 141, 45, 18293, 18300, 13 Nov. 2019, [Peer-reviewed]
English, Scientific journal - Molecular Wires with Controllable π‐Delocalization Incorporating Redox‐Triggered π‐Conjugated Switching Units
Wataru Nojo, Hitomi Tamaoki, Yusuke Ishigaki, Ryo Katoono, Kenshu Fujiwara, Takanori Fukushima, Takanori Suzuki
ChemPlusChem, 84, 6, 634, 642, 24 Jun. 2019, [Peer-reviewed]
English, Scientific journal - Selective Formation of a Mixed‐Valence State from Linearly Bridged Oligo(aromatic diamines): Drastic Structural Change into a Folded Columnar Stack for Half‐filled Polycations
Wataru Nojo, Yusuke Ishigaki, Takashi Takeda, Tomoyuki Akutagawa, Takanori Suzuki
Chemistry – A European Journal, 25, 32, 7759, 7765, 07 Jun. 2019, [Peer-reviewed]
English, Scientific journal - Total synthesis of kehokorins A and B
Kenshu Fujiwara, Ryosuke Motousu, Daisuke Sato, Yoshihiko Kondo, Uichi Akiba, Takanori Suzuki, Tetsuo Tokiwano
Tetrahedron Letters, 60, 18, 1299, 1301, 02 May 2019
English, Scientific journal - Synthesis of the cyclohexene segment of portimine
Takafumi Saito, Kenshu Fujiwara, Yoshihiko Kondo, Uichi Akiba, Takanori Suzuki
Tetrahedron Letters, 60, 4, 386, 389, 24 Jan. 2019
English, Scientific journal - A novel condensed heterocyclic quinone with a dibenzofuranobisthiadiazole skeleton
Kazuma Sugawara, Wataru Nojo, Yusuke Ishigaki, Junko Ohkanda, Takanori Suzuki
Heterocycles, published online., 1, 99, 103, 2019
English, Scientific journal - Two-way chromic systems based on tetraarylanthraquinodimethanes: Electrochromism in solution and mechanofluorochromism in a solid state
Ishigaki Y, Sugawara K, Yoshida M, Kato M, Suzuki T
Bulletin of the Chemical Society of Japan, 92, 7, 1211, 1217, 2019, [Peer-reviewed]
English, Scientific journal - Dual dynamic chirality generated in the assembly of three achiral rods through the three-fold twisting of a macrocycle
Ryo Katoono, Kazuki Sakamoto, Takanori Suzuki
Chemical Communications, 55, 38, 5503, 5506, 2019, [Peer-reviewed]
English, Scientific journal - Chiral diversification through the assembly of achiral phenylacetylene macrocycles with a two-fold bridge
Ryo Katoono, Keiichi Kusaka, Yuki Saito, Kazuki Sakamoto, Takanori Suzuki
Chemical Science, 10, 18, 4782, 4791, 2019, [Peer-reviewed]
English, Scientific journal - Engineering of Electrochromic Materials as Activatable Probes for Molecular Imaging and Photodynamic Therapy
Luyan Wu, Yidan Sun, Keisuke Sugimoto, Zhiliang Luo, Yusuke Ishigaki, Kanyi Pu, Takanori Suzuki, Hong-Yuan Chen, Deju Ye
Journal of the American Chemical Society, 140, 47, 16340, 16352, 28 Nov. 2018, [Peer-reviewed]
English, Scientific journal - Transmission of Point Chirality to Axial Chirality for Strong Circular Dichroism in Triarylmethylium-o,o-dimers
Takanori Suzuki, Yusuke Ishigaki, Tomohiro Iwai, Yuki Hayashi, Aiichiro Nagaki, Ryo Katoono, Kenshu Fujiwara, Jun-ichi Yoshida
Synlett, 29, 16, 2147, 2154, 25 Oct. 2018, [Peer-reviewed]
English, Scientific journal - Double bond formation based on nitroaldol reaction and radical elimination: A prototype segment connection method for the total synthesis of nigricanoside A dimethyl ester
Takayuki Tsunoda, Kenshu Fujiwara, Satoshi Okamoto, Yoshihiko Kondo, Uichi Akiba, Yusuke Ishigaki, Ryo Katoono, Takanori Suzuki
Tetrahedron Letters, 59, 19, 1846, 1850, May 2018, [Peer-reviewed]
Scientific journal - Longest C–C Single Bond among Neutral Hydrocarbons with a Bond Length beyond 1.8 Å
Yusuke Ishigaki, Takuya Shimajiri, Takashi Takeda, Ryo Katoono, Takanori Suzuki
Chem, 4, 4, 795, 806, 12 Apr. 2018, [Peer-reviewed]
English, Scientific journal - An improved synthesis of the C42–C52 segment of ciguatoxin 3C
Takafumi Saito, Kenshu Fujiwara, Yusuke Sano, Takuto Sato, Yoshihiko Kondo, Uichi Akiba, Yusuke Ishigaki, Ryo Katoono, Takanori Suzuki
Tetrahedron Letters, 59, 14, 1372, 1376, Apr. 2018, [Peer-reviewed]
English, Scientific journal - Narrower HOMO-LUMO gap attained by conformational switching through peripheral polyarylation in 1,4,5,8-tetraaza-9,10-anthraquinodimethanes
Suzuki, T, Ishigaki, Y, Sugawara, K, Umezawa, Y, Katoono, R, Shimoyama, A, Manabe, Y, Fukase, K, Fukushima, T
Tetrahedron, 74, 18, 2239, 2244, Apr. 2018, [Peer-reviewed]
English, Scientific journal - Expandability of a long C–O bond by a scissor effect in acenaphthofuran
Yasuto Uchimura, Takuya Shimajiri, Yusuke Ishigaki, Ryo Katoono, Takanori Suzuki
Chemical Communications, 54, 73, 10300, 10303, 2018, [Peer-reviewed]
English, Scientific journal - Dynamic or undynamic chirality generated by helical arrangement of a shape-persistent ring and rod doubly bridged in a molecule
Ryo Katoono, Yudai Obara, Keiichi Kusaka, Takanori Suzuki
Chemical Communications, 54, 7, 735, 738, 2018, [Peer-reviewed]
English, Scientific journal - Supramolecular chiroptical switching of helical-sense preferences through the two-way intramolecular transmission of a single chiral source
Ryo Katoono, Keiichi Kusaka, Yuki Tanaka, Kenshu Fujiwara, Takanori Suzuki
Organic and Biomolecular Chemistry, 16, 7, 1167, 1171, 2018, [Peer-reviewed]
English, Scientific journal - Enhanced circular dichroism at elevated temperatures through complexation-induced transformation of a three-layer cyclophane with dualistic dynamic helicity
Ryo Katoono, Yudai Obara, Kenshu Fujiwara, Takanori Suzuki
Chemical Science, 9, 8, 2222, 2229, 2018, [Peer-reviewed]
English, Scientific journal - Direct synthesis of aryl-annulated [c]carbazoles by gold(i)-catalysed cascade reaction of azide-diynes and arenes
Yuiki Kawada, Shunsuke Ohmura, Misaki Kobayashi, Wataru Nojo, Masaki Kondo, Yuka Matsuda, Junpei Matsuoka, Shinsuke Inuki, Shinya Oishi, Chao Wang, Tatsuo Saito, Masanobu Uchiyama, Takanori Suzuki, Hiroaki Ohno
Chemical Science, 9, 44, 8416, 8425, 2018, [Peer-reviewed]
English, Scientific journal - 9,10-Dihydrophenanthrene with Two Spiro(dibenzocycloheptatriene) Units: A Highly Strained Caged Hydrocarbon Exhibiting Reversible Electrochromic Behavior
Yusuke Ishigaki, Yuki Hayashi, Kazuma Sugawara, Takuya Shimajiri, Wataru Nojo, Ryo Katoono, Takanori Suzuki
MOLECULES, 22, 11, Nov. 2017, [Peer-reviewed]
English, Scientific journal - Back Cover: Organic Molecular Layer with High Electrochemical Bistability: Synthesis, Structure, and Properties of a Dynamic Redox System with Lipoate Units for Binding to Au(111) (ChemPlusChem 7/2017)
Eisuke Ohta, Hiromitsu Uehara, Ying Han, Kazuhisa Wada, Hidenori Noguchi, Ryo Katoono, Yusuke Ishigaki, Hiroshi Ikeda, Kohei Uosaki, Takanori Suzuki
ChemPlusChem, 82, 7, 1043, 1047, 14 Jul. 2017, [Peer-reviewed]
English, Scientific journal - Organic Molecular Layer with High Electrochemical Bistability: Synthesis, Structure, and Properties of a Dynamic Redox System with Lipoate Units for Binding to Au(111)
Eisuke Ohta, Hiromitsu Uehara, Ying Han, Kazuhisa Wada, Hidenori Noguchi, Ryo Katoono, Yusuke Ishigaki, Hiroshi Ikeda, Kohei Uosaki, Takanori Suzuki
CHEMPLUSCHEM, 82, 7, 1043, 1047, Jul. 2017, [Peer-reviewed]
English, Scientific journal - Bis(diarylethenyl)-thiophenes, -bithiophenes, and -terthiophenes: a new series of electrochromic systems that exhibit a fluorescence response
Yusuke Ishigaki, Hidetoshi Kawai, Ryo Katoono, Kenshu Fujiwara, Hiroki Higuchi, Hirotsugu Kikuchi, Takanori Suzuki
CANADIAN JOURNAL OF CHEMISTRY, 95, 3, 243, 252, Mar. 2017, [Peer-reviewed]
English, Scientific journal - Synthesis of the ABCDEF-ring of ciguatoxin 3C
Takuto Sato, Kenshu Fujiwara, Keisuke Nogoshi, Akiyoshi Goto, Daisuke Domon, Natsumi Kawamura, Yoshitaka Nomura, Daisuke Sato, Hideki Tanaka, Akio Murai, Yoshihiko Kondo, Uichi Akiba, Ryo Katoono, Hidetoshi Kawai, Takanori Suzuki
TETRAHEDRON, 73, 6, 703, 726, Feb. 2017, [Peer-reviewed]
English, Scientific journal - OXIDATIVE DESULFURIZATION OF ELECTRON-DONATING 5,5,7,7-TETRAARYL-5,7-DIHYDRODIBENZO[c,e]THIEPINS AND THE RELATED HETEROCYCLES: GENERATION OF DICATIONIC DYES UPON TWO-ELECTRON OXIDATION
Suzuki, Takanori, Kuroda, Takuma, Tamaoki, Hitomi, Higasa, Sho, Nehira, Tatsuo, Katoono, Ryo, Ishigaki, Yusuke, Fujiwara, Kenshu, Fukushima, Takanori, Yamada, Hidetoshi
Heterocycles, 95, 2, 816, 829, 2017, [Peer-reviewed]
English, Scientific journal - STEREOSELECTIVE ENCAPSULATION FOR A TRIARYLMETHYLIUM o,o-DIMER BY NATURAL gamma-CYCLODEXTRIN: ORIGIN OF CHIRAL RECOGNITION FOR THE AXIALLY CHIRAL DICATIONIC GUEST
Suzuki, Takanori, Suzuki, Takanori, Ceron-Carrasco, Jose P., Ceron-Carrasco, Jose P., Tamaoki, Hitomi, Tamaoki, Hitomi, Ishigaki, Yusuke, Ishigaki, Yusuke, Katoono, Ryo, Katoono, Ryo, Fukushima, Takanori, Fukushima, Takanori, Perez-Sanchez, Horacio, Perez-Sanchez, Horacio
Heterocycles, 94, 6, 1123, 1132, 2017, [Peer-reviewed]
English, Scientific journal - Redox-induced Conformational Changes in 1,3-Propylene- and m-Xylylenebis[5-(10-butyl-5,10-dihydrobenzo[a]indolo[2,3-c]carbazole)]: Twin-BIC Donors that Form Sandwich-like Dimeric Cations Exhibiting NIR Absorption
Takanori Suzuki, Wataru Nojo, Yuto Sakano, Ryo Katoono, Yusuke Ishigaki, Hiroaki Ohno, Kenshu Fujiwara
CHEMISTRY LETTERS, 45, 7, 720, 722, Jul. 2016, [Peer-reviewed]
English, Scientific journal - Assembly of an Axially Chiral Dynamic Redox System with a Perfluorobiphenyl Skeleton into Dumbbell‐ or Tripod‐type Electron Donors
Hitomi Tamaoki, Ryo Katoono, Kenshu Fujiwara, Takanori Suzuki
Angewandte Chemie, 128, 7, 2628, Wiley-Blackwell, 12 Feb. 2016, [Peer-reviewed]
Scientific journal - Assembly of an Axially Chiral Dynamic Redox System with a Perfluorobiphenyl Skeleton into Dumbbell- or Tripod-type Electron Donors
Hitomi Tamaoki, Ryo Katoono, Kenshu Fujiwara, Takanori Suzuki
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 55, 7, 2582, 2586, Feb. 2016, [Peer-reviewed]
English, Scientific journal - Dynamic helical cyclophanes with two quadruply-bridged planes arranged in an "obverse and/or reverse" relation
Ryo Katoono, Shunsuke Kawai, Takanori Suzuki
CHEMICAL SCIENCE, 7, 5, 3240, 3247, 2016, [Peer-reviewed]
English, Scientific journal - REDOX-MEDIATED REVERSIBLE sigma-BOND FORMATION/CLEAVAGE
Suzuki, Takanori, Tamaoki, Hitomi, Nishida, Jun-ichi, Higuchi, Hiroki, Iwai, Tomohiro, Ishigaki, Yusuke, Hanada, Keisuke, Katoono, Ryo, Kawai, Hidetoshi, Fujiwara, Kenshu, Fukushima, Takanori, Nishinaga, T
Organic Redox Systems: Synthesis, Properties, and Applications, 2016, [Peer-reviewed]
Scientific journal - Planar chiral desymmetrization of a two-layered cyclophane and control of dynamic helicity through the arrangement of two nonstereogenic centers
Ryo Katoono, Takanori Suzuki
CHEMICAL COMMUNICATIONS, 52, 5, 1029, 1031, 2016, [Peer-reviewed]
English, Scientific journal - Synthesis of Ganbajunins D and E and the Proposed Structure of
Fujiwara K, Kushibe K, Sato T, Norikura T, Matsue H, Iwai K, Katoono R, Suzuki T
Eur. J. Org. Chem., 26, 26, 5798, 5809, Sep. 2015, [Peer-reviewed]
English, Scientific journal - ChemInform Abstract: Electrochromic and Unique Chiroptical Properties of Helically Deformed Tetraarylquinodimethanes Generated from Less-Hindered Dicationic Precursors Upon Reduction
Takanori Suzuki, Yuto Sakano, Tomohiro Iwai, Shinichi Iwashita, Youhei Miura, Ryo Katoono, Hidetoshi Kawai, Kenshu Fujiwara, Yasushi Tsuji, Takanori Fukushima
ChemInform, 46, 38, no, no, Wiley-Blackwell, Sep. 2015, [Peer-reviewed]
Scientific journal - Dynamic Figure Eight Chirality: Multifarious Inversions of a Helical Preference Induced by Complexation
Ryo Katoono, Yuki Tanaka, Keiichi Kusaka, Kenshu Fujiwara, Takanori Suzuki
JOURNAL OF ORGANIC CHEMISTRY, 80, 15, 7613, 7625, Aug. 2015, [Peer-reviewed]
English, Scientific journal - Reversible Interconversion between 11,11,12,12-Tetraaryl-1,4-diaza/-1,4,5,8-tetraazaanthraquinodimethanes and Their Cationic Species: Electrochromic and Halochromic Responses
Takanori Suzuki, Yu Umezawa, Yuto Sakano, Hitomi Tamaoki, Ryo Katoono, Kenshu Fujiwara
CHEMISTRY LETTERS, 44, 7, 905, 907, Jul. 2015, [Peer-reviewed]
English, Scientific journal - ChemInform Abstract: Bis(10-methylacridinium)s as a Versatile Platform for Redox-Active Functionalized Dyes and Novel Structures
Takanori Suzuki, Takashi Takeda, Eisuke Ohta, Kazuhisa Wada, Ryo Katoono, Hidetoshi Kawai, Kenshu Fujiwara
ChemInform, 46, 18, no, no, Wiley-Blackwell, Apr. 2015, [Peer-reviewed]
Scientific journal - New Insights into the Hexaphenylethane Riddle: Formation of an alpha,o-Dimer
Yasuto Uchimura, Takashi Takeda, Ryo Katoono, Kenshu Fujiwara, Takanori Suzuki
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 54, 13, 4010, 4013, Mar. 2015
English, Scientific journal - New Insights into the Hexaphenylethane Riddle: Formation of an alpha,o-Dimer
Yasuto Uchimura, Takashi Takeda, Ryo Katoono, Kenshu Fujiwara, Takanori Suzuki
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 54, 13, 4010, 4013, Mar. 2015, [Peer-reviewed]
English, Scientific journal - Bis(10-methylacridinium)s as a Versatile Platform for Redox-Active Functionalized Dyes and Novel Structures
Takanori Suzuki, Takashi Takeda, Eisuke Ohta, Kazuhisa Wada, Ryo Katoono, Hidetoshi Kawai, Kenshu Fujiwara
CHEMICAL RECORD, 15, 1, 280, 294, Feb. 2015, [Peer-reviewed]
English, Scientific journal - New Insights into the Hexaphenylethane Riddle: Formation of an α, o -Dimer
Yasuto Uchimura, Takashi Takeda, Ryo Katoono, Kenshu Fujiwara, Takanori Suzuki
Angew. Chem., 127, 13, 4082, 4085, Wiley-Blackwell, Feb. 2015, [Peer-reviewed]
Scientific journal - Inside Back Cover: New Insights into the Hexaphenylethane Riddle: Formation of an α, o -Dimer (Angew. Chem. Int. Ed. 13/2015)
Yasuto Uchimura, Takashi Takeda, Ryo Katoono, Kenshu Fujiwara, Takanori Suzuki
Angew. Chem. Int. Ed., 54, 13, 4125, 4125, Wiley-Blackwell, Feb. 2015, [Peer-reviewed]
Scientific journal - Two-way chromic interconversion of the 2,2 '-biphenol-6,6 '-diyl dication with 5H,10H-dioxapyrene or 9H,10H-4,5-dihydroxyphenanthrene
Yuto Sakano, Ryo Katoono, Kenshu Fujiwara, Takanori Suzuki
CHEMICAL COMMUNICATIONS, 51, 76, 14303, 14305, 2015
English, Scientific journal - THREE-WAY OUTPUT MOLECULAR RESPONSE SYSTEM BASED ON TETRAKIS(3,4-DIALKOXYPHENYL)-3,4-DIHYDRO[5]HELICENES: PERTURBATION OF PROPERTIES BY LONG ALKYL CHAINS
Yusuke Ishigaki, Satoshige Yoshida, Hidetoshi Kawai, Ryo Katoono, Kenshu Fujiwara, Takanori Fukushima, Takanori Suzuki
HETEROCYCLES, 90, 1, 126, 135, Jan. 2015, [Peer-reviewed]
English, Scientific journal - STEREOSELECTIVE SYNTHESIS OF THE A-RING OF ARMATOL A FROM A BROMO-SUBSTITUTED CHIRAL BUILDING BLOCK BASED ON IRELAND-CLAISEN REARRANGEMENT AND RING-CLOSING OLEFIN METATHESIS
Yuta Hirose, Kenshu Fujiwara, Takafumi Saito, Ryo Katoono, Takanori Suzuki
HETEROCYCLES, 91, 1, 76, 103, Jan. 2015, [Peer-reviewed]
English, Scientific journal - Controllability of dynamic double helices: quantitative analysis of the inversion of a screw-sense preference upon complexation
Ryo Katoono, Shunsuke Kawai, Kenshu Fujiwara, Takanori Suzuki
CHEMICAL SCIENCE, 6, 11, 6592, 6600, 2015, [Peer-reviewed]
English, Scientific journal - BIS(DIARYLETHENYL)THIOPHENE, -BITHIOPHENE, AND -TERTHIOPHENE: A NEW SERIES OF VIOLENE-CYANINE HYBRID-TYPE ELECTRON DONORS
Yusuke Ishigaki, Hidetoshi Kawai, Ryo Katoono, Kenshu Fujiwara, Takanori Suzuki
HETEROCYCLES, 90, 1, 136, 143, Jan. 2015, [Peer-reviewed]
English, Scientific journal - Controlled Dynamic Helicity of a Folded Macrocycle Based on a Bisterephthalamide with a Twofold Z-Shaped Structure
Ryo Katoono, Keiichi Kusaka, Kenshu Fujiwara, Takanori Suzuki
CHEMISTRY-AN ASIAN JOURNAL, 9, 11, 3182, 3187, Nov. 2014
English, Scientific journal - A Foldable Cyclic Oligomer: Chiroptical Modulation through Molecular Folding upon Complexation and a Change in Temperature
Ryo Katoono, Yuki Tanaka, Kenshu Fujiwara, Takanori Suzuki
JOURNAL OF ORGANIC CHEMISTRY, 79, 21, 10218, 10225, Nov. 2014, [Peer-reviewed]
English, Scientific journal - ChemInform Abstract: Hexaphenylethanes with an Ultralong C-C Bond: Expandability of the C-C Bond in Highly Strained Tetraarylpyracenes
Takashi Takeda, Yasuto Uchimura, Hidetoshi Kawai, Ryo Katoono, Kenshu Fujiwara, Takanori Suzuki
ChemInform, 45, 30, no, no, Wiley-Blackwell, 10 Jul. 2014, [Peer-reviewed]
Scientific journal - Wurster's Blue-type Cation Radicals Framed in a 5,10-Dihydrobenzo[a]indolo[2,3-c]carbazole (BIC) Skeleton: Dual Electrochromism with Drastic Changes in UV/Vis/NIR and Fluorescence
Takanori Suzuki, Yuto Sakano, Yusuke Tokimizu, Youhei Miura, Ryo Katoono, Kenshu Fujiwara, Naoki Yoshioka, Nobutaka Fujii, Hiroaki Ohno
CHEMISTRY-AN ASIAN JOURNAL, 9, 7, 1841, 1846, Jul. 2014, [Peer-reviewed]
English, Scientific journal - Preparation, Redox Properties, and X-ray Structures of Electrochromic 11,11,12,12-Tetraarylanthraquinodimethane and Its Bianthraquinodimethane Analogue: Drastic Geometrical Changes upon Interconversion with Dicationic Dyes
Yuto Sakano, Ryo Katoono, Kenshu Fujiwara, Takanori Suzuki
CHEMISTRY LETTERS, 43, 7, 1143, 1145, Jul. 2014, [Peer-reviewed]
English, Scientific journal - Electrochiroptical Response in Aqueous Media: 9,10-Dihydrophenanthrene-9,10-diyl Dications with Michlar's Hydrol Blue Chromophores Attached with Oligoethylene Glycol Units
Takanori Suzuki, Keisuke Hanada, Ryo Katoono, Yusuke Ishigaki, Sho Higasa, Hiroki Higuchi, Hirotsugu Kikuchi, Kenshu Fujiwara, Hidetoshi Yamada, Takanori Fukushima
CHEMISTRY LETTERS, 43, 7, 982, 984, Jul. 2014, [Peer-reviewed]
English, Scientific journal - Oxidative Protonolysis of the Expanded Central C-C Bond in a Di(spiroacridan)-type Hexaphenylethane Derivative Accompanied by UV- vis, FL, and CD Spectral Changes
Takanori Suzuki, Yusuke Kuroda, Kazuhisa Wada, Yuto Sakano, Ryo Katoono, Kenshu Fujiwara, Fumitoshi Kakiuchi, Takanori Fukushima
CHEMISTRY LETTERS, 43, 6, 887, 889, Jun. 2014, [Peer-reviewed]
English, Scientific journal - Inside Back Cover: Wurster’s Blue-type Cation Radicals Framed in a 5,10-Dihydrobenzo[ a ]indolo[2,3- c ]carbazole (BIC) Skeleton: Dual Electrochromism with Drastic Changes in UV/Vis/NIR and Fluorescence (Chem. Asian J. 7/2014)
Takanori Suzuki, Yuto Sakano, Yusuke Tokimizu, Youhei Miura, Ryo Katoono, Kenshu Fujiwara, Naoki Yoshioka, Nobutaka Fujii, Hiroaki Ohno
Chem. Asian J., 9, 7, 1967, 1967, Wiley-Blackwell, Jun. 2014, [Peer-reviewed]
Scientific journal - Cyanoazulene-based Multistage Redox Systems Prepared from Vinylcyclopropanecarbonitrile and Cyclopentenone via Divinylcyclopropane-rearrangement Approach
Keiji Tanino, Takumasa Yamada, Fumihiko Yoshimura, Takanori Suzuki
CHEMISTRY LETTERS, 43, 5, 607, 609, May 2014, [Peer-reviewed]
English, Scientific journal - Electrochromic and unique chiroptical properties of helically deformed tetra-arylquinodimethanes generated from lesshindered dicationic precursors upon reduction
Takanori Suzuki, Yuto Sakano, Tomohiro Iwai, Shinichi Iwashita, Youhei Miura, Ryo Katoono, Hidetoshi Kawai, Kenshu Fujiwara, Yasushi Tsuji, Takanori Fukushima
PURE AND APPLIED CHEMISTRY, 86, 4, 507, 516, Apr. 2014, [Peer-reviewed]
English, Scientific journal - Total Synthesis of Pectenotoxin-2
Kenshu Fujiwara, Yuki Suzuki, Nao Koseki, Yu-ichi Aki, Yuta Kikuchi, Shun-ichi Murata, Fuyuki Yamamoto, Mariko Kawamura, Toshio Norikura, Hajime Matsue, Akio Murai, Ryo Katoono, Hidetoshi Kawai, Takanori Suzuki
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 53, 3, 780, 784, Jan. 2014, [Peer-reviewed]
English, Scientific journal - Complexation-induced inversion of helicity by an organic guest in a dynamic molecular propeller based on a tristerephthalamide host with a two-layer structure
Ryo Katoono, Kenshu Fujiwara, Takanori Suzuki
CHEMICAL COMMUNICATIONS, 50, 41, 5438, 5440, 2014, [Peer-reviewed]
English, Scientific journal - Expandability of Ultralong C-C Bonds: Largely Different C-1-C-2 Bond Lengths Determined by Low-temperature X-ray Structural Analyses on Pseudopolymorphs of 1,1-Bis(4-fluorophenyl)-2,2-bis(4-methoxyphenyl)pyracene
Takanori Suzuki, Yasuto Uchimura, Fumika Nagasawa, Takashi Takeda, Hidetoshi Kawai, Ryo Katoono, Kenshu Fujiwara, Kei Murakoshi, Takanori Fukushima, Aiichiro Nagaki, Jun-ichi Yoshida
CHEMISTRY LETTERS, 43, 1, 86, 88, Jan. 2014, [Peer-reviewed]
English, Scientific journal - Chiroptical molecular propellers based on hexakis(phenylethynyl)benzene through the complexation-induced intramolecular transmission of local point chirality
Ryo Katoono, Keiichi Kusaka, Shunsuke Kawai, Yuki Tanaka, Keisuke Hanada, Tatsuo Nehira, Kenshu Fujiwara, Takanori Suzuki
ORGANIC & BIOMOLECULAR CHEMISTRY, 12, 47, 9532, 9538, 2014
English, Scientific journal - Preparation and structure of acenaphthylene-1,2-diyldi(9-acridine) derivatives with a long C=C bond
Takashi Takeda, Yasuto Uchimura, Hidetoshi Kawai, Ryo Katoono, Kenshu Fujiwara, Takanori Suzuki
CHEMICAL COMMUNICATIONS, 50, 30, 3924, 3927, 2014, [Peer-reviewed]
English, Scientific journal - CHIRAL MEMORY UNITS BASED ON DYNAMIC REDOX SYSTEMS WITH A DIBENZOXEPINONE SKELETON: DRASTIC CHANGE IN RACEMIZATION BARRIER AND ELECTROCHEMICAL BISTABILITY
Kazuhisa Wada, Yuna Chiba, Takashi Takeda, Hidetoshi Kawai, Ryo Katoono, Kenshu Fujiwara, Takanori Suzuki
HETEROCYCLES, 88, 2, 945, 952, Jan. 2014, [Peer-reviewed]
English, Scientific journal - A C3-symmetric chiroptical molecular propeller based on hexakis(phenylethynyl)benzene with a threefold terephthalamide: Stereospecific propeller generation through the cooperative transmission of point chiralities on the host and guest upon complexation
Ryo Katoono, Hidetoshi Kawai, Masakazu Ohkita, Kenshu Fujiwara, Takanori Suzuki
Chemical Communications, 49, 88, 10352, 10354, 14 Nov. 2013, [Peer-reviewed]
English, Scientific journal - Total Synthesis of Pectenotoxin-2
Kenshu Fujiwara, Yuki Suzuki, Nao Koseki, Yu-ichi Aki, Yuta Kikuchi, Shun-ichi Murata, Fuyuki Yamamoto, Mariko Kawamura, Toshio Norikura, Hajime Matsue, Akio Murai, Ryo Katoono, Hidetoshi Kawai, Takanori Suzuki
Angew. Chem., 126, 3, 799, 803, Wiley-Blackwell, Nov. 2013, [Peer-reviewed]
Scientific journal - Time-integrated One-pot Synthesis, X-ray Structure, and Redox Properties of Electrochromic 1,3-Diarylisobenzofurans
Toshiyuki Hamura, Ryosuke Nakayama, Keisuke Hanada, Yuto Sakano, Ryo Katoono, Kenshu Fujiwara, Takanori Suzuki
CHEMISTRY LETTERS, 42, 10, 1244, 1246, Oct. 2013, [Peer-reviewed]
English, Scientific journal - Geometrical Remote Steric Effects in 4,5-Disubstituted-9,10-dihydrophenanthrenes: Expansion of Prestrained C-9-C-10 Bond in Di(spiroacridan) Derivatives
Kazuhisa Wada, Takashi Takeda, Hidetoshi Kawai, Ryo Katoono, Kenshu Fujiwara, Takanori Suzuki
CHEMISTRY LETTERS, 42, 10, 1194, 1196, Oct. 2013, [Peer-reviewed]
English, Scientific journal - Preparation, Properties, and X-ray Structures of Bis(10-methyl-9-methyleneacridan)-type Electron Donors with a Thiophene, Bithiophene, or Terthiophene Skeleton: Redox Switching of Thiophene-Thienoquinoid Structure Accompanied by UV-vis-NIR Electrochromic Response
Takanori Suzuki, Yuulci Hoshiyama, Kazuhisa Wada, Yusuke Ishigaki, Youhei Miura, Hidetoshi Kawai, Ryo Katoono, Kenshu Fujiwara, Takanori Fukushima
CHEMISTRY LETTERS, 42, 9, 1004, 1006, Sep. 2013, [Peer-reviewed]
English, Scientific journal - 5,10-Dihydrobenzo[a]indolo[2,3-c]carbazole: A Highly Fluorescent Disk-shaped Electron Donor Exhibiting Dual UV-vis-NIR and Fluorescence Spectral Changes upon Electrolysis
Takanori Suzuki, Yusuke Toldmizu, Yuto Sakano, Ryo Katoono, Kenshu Fujiwara, Saori Naoe, Nobutaka Fujii, Hiroaki Ohno
CHEMISTRY LETTERS, 42, 9, 1001, 1003, Sep. 2013, [Peer-reviewed]
English, Scientific journal - Hexaphenylethanes with an Ultra long C-C Bond: Expandability of the C-C Bond in Highly Strained Tetraarylpyracenes
Takashi Takeda, Yasuto Uchimura, Hidetoshi Kawai, Ryo Katoono, Kenshu Fujiwara, Takanori Suzuki
CHEMISTRY LETTERS, 42, 9, 954, 962, Sep. 2013, [Peer-reviewed]
English - A stereoselective method for the construction of the C8 '-O-C6 '' ether of nigricanoside-A: synthesis of simple models for the C20 lipid chain/galactosyl glycerol segment
Naoto Kinashi, Kenshu Fujiwara, Takayuki Tsunoda, Ryo Katoono, Hidetoshi Kawai, Takanori Suzuki
TETRAHEDRON LETTERS, 54, 34, 4564, 4567, Aug. 2013, [Peer-reviewed]
English, Scientific journal - Redox Switching of Conjugation Length Using 9,9,10,10-Tetraaryl-9,10-dihydrophenanthrene as an ON/OFF Unit: Preparation, X-ray Structure, and Redox Properties of Perfluorobiphenyl Derivative and Its SNAr Reactions to pi-Extended Analogues
Takanori Suzuki, Hitomi Tamaoki, Ryo Katoono, Kenshu Fujiwara, Junji Ichikawa, Takanori Fukushima
CHEMISTRY LETTERS, 42, 7, 703, 705, Jul. 2013, [Peer-reviewed]
English, Scientific journal - Oxidative Conversion of Tetraaryldihydrodibenzothiepins into Elemental Sulfur and Stable Cationic Dyes Accompanied by Dual UV-vis and CD Spectral Changes
Takanori Suzuki, Takuma Kuroda, Hitomi Tamaoki, Sho Higasa, Ryo Katoono, Kenshu Fujiwara, Takanori Fukushima, Hidetoshi Yamada
CHEMISTRY LETTERS, 42, 7, 706, 708, Jul. 2013, [Peer-reviewed]
English, Scientific journal - Hydrindacene-based acetylenic macrocycles with horizontally and vertically ordered functionality arrays
Hidetoshi Kawai, Tatsuya Utamura, Erina Motoi, Tomoko Takahashi, Hiroyoshi Sugino, Manabu Tamura, Masakazu Ohkita, Kenshu Fujiwara, Takao Saito, Takashi Tsuji, Takanori Suzuki
Chemistry - A European Journal, 19, 14, 4513, 4524, 02 Apr. 2013
English, Scientific journal - An Ireland-Claisen rearrangement/RCM based approach for the construction of the EF-ring of ciguatmdn 3C
Keisuke Nogoshi, Daisuke Domon, Kenshu Fujiwara, Natsumi Kawamura, Ryo Katoono, Hidetoshi Kawai, Takanori Suzuki
TETRAHEDRON LETTERS, 54, 7, 676, 680, Feb. 2013, [Peer-reviewed]
English, Scientific journal - 7,7,8,8-Tetraaryl-o-quinodimethane Stabilized by Dibenzo Annulation: A Helical pi-Electron System That Exhibits Electrochromic and Unique Chiroptical Properties
Takanori Suzuki, Yuto Sakano, Tomohiro Iwai, Shinichi Iwashita, Youhei Miura, Ryo Katoono, Hidetoshi Kawai, Kenshu Fujiwara, Yasushi Tsuji, Takanori Fukushima
CHEMISTRY-A EUROPEAN JOURNAL, 19, 1, 117, 123, Jan. 2013, [Peer-reviewed]
English, Scientific journal - A new variant of fused cyclic ether synthesis based on ireland-claisen rearrangement and RCM
Daisuke Domon, Kenshu Fujiwara, Natsumi Kawamura, Ryo Katoono, Hidetoshi Kawai, Takanori Suzuki
Natural Product Communications, 8, 7, 929, 934, 2013
English, Scientific journal - Stable neutral radicals based on the polyazaacene skeleton that exhibit high electrochemical amphotericity
Youhei Miura, Hiroshi Chiba, Ryo Katoono, Hidetoshi Kawai, Kenshu Fujiwara, Shuichi Suzuki, Keiji Okada, Takanori Suzuki
TETRAHEDRON LETTERS, 53, 48, 6561, 6564, Nov. 2012, [Peer-reviewed]
English, Scientific journal - Effects of Axle-Core, Macrocycle, and Side-Station Structures on the Threading and Hydrolysis Processes of Imine-Bridged Rotaxanes
Hiroyoshi Sugino, Hidetoshi Kawai, Takeshi Umehara, Kenshu Fujiwara, Takanori Suzuki
CHEMISTRY-A EUROPEAN JOURNAL, 18, 43, 13722, 13732, Oct. 2012, [Peer-reviewed]
English - P-27 Synthetic studies on Nigricanoside A dimethyl Ester(Poster Presentation)
Kinashi Naoto, Fujiwara Kenshu, Katoono Ryo, Kawai Hidetoshi, Suzuki Takanori
Symposium on the Chemistry of Natural Products, symposium papers, 54, 345, 350, Symposium on the chemistry of natural products, 01 Sep. 2012
Japanese, Nigricanocide A dimethyl ester (1), which originated from the green alga Avrainvillea nigricans, is an antimitotic galactoglycerolipid. It is structurally characterized by two ether linkages between a galactosyl glycerol and a C20 oxylipin and between C16 and C20 oxylipins. While the planar structure of the lipid chains and the partial relative configuration of the galactosyl glycerol moiety have been determined, the full absolute stereochemistry is unclear. Therefore, we started a program for determining the full absolute stereostructure of nigricanoside A dimethyl ester by total synthesis. As a part of the program, stereoselective methods for constructing the ether linkages between the galactosyl glycerol and the C20 lipid chain and between the C20 and C16 lipid chains have been developed. Model compounds ((8'R)-4 and (8'S)-4) corresponding to the bottom half of 1, including the C20 lipid chain and the galactosyl glycerol, has also been synthesized. The ether linkage between the galactose and the C20 lipid chain was constructed stereoselectively by the chirality-transferring Ireland-Claisen rearrangement of a 1-substituted-2-bromoallyl alkoxyacetate, which consisted of an optically active 2-bromo-1-alken-3-ol and a 6-(carboxymethoxy)galactose derivative. The rearrangement products were converted to model conpounds (8'R)-4 and (8'S)-4 via a process including Julia olefination with sulfone 5, Mori's alkyne formation, and Lindlar hydrogenation. The ether linkage between lipid chains was stereoselectively synthesized by an Evans type aldol reaction under lithium enolate conditions. Details will be presented in the poster session. - Total Synthesis of Thelephantin O, Vialinin A/Terrestrin A, and Terrestrins B-D
Kenshu Fujiwara, Takuto Sato, Yusuke Sano, Toshio Norikura, Ryo Katoono, Takanori Suzuki, Hajime Matsue
JOURNAL OF ORGANIC CHEMISTRY, 77, 11, 5161, 5166, Jun. 2012, [Peer-reviewed]
English, Scientific journal - Nonadditive Substituent Effects on Expanding Prestrained C-C Bond in Crystal: X-ray Analyses on Unsymmetrically Substituted Tetraarylpyracenes Prepared by a Flow Microreactor Method
Takanori Suzuki, Yasuto Uchimura, Yusuke Ishigaki, Takashi Takeda, Ryo Katoono, Hidetoshi Kawai, Kenshu Fujiwara, Aiichiro Nagaki, Jun-ichi Yoshida
CHEMISTRY LETTERS, 41, 5, 541, 543, May 2012, [Peer-reviewed]
English, Scientific journal - Molecular Gyroscope with a trans-Cyclohexane-1,4-diimine Rotor Unit: Isolation and Characterization of a Geometric Isomer as a Formal Intermediate of Hindered Rotation
Hiroyoshi Sugino, Hidetoshi Kawai, Kenshu Fujiwara, Takanori Suzuki
CHEMISTRY LETTERS, 41, 1, 79, 81, Jan. 2012, [Peer-reviewed]
English, Scientific journal - Induced preference for axial chirality in a triarylmethylium o,o-dimer upon complexation with natural gamma-cyclodextrin: strong ECD signaling and fixation of supramolecular chirality to molecular chirality
Takanori Suzuki, Hitomi Tamaoki, Kazuhisa Wada, Ryo Katoono, Tatsuo Nehira, Hidetoshi Kawai, Kenshu Fujiwara
CHEMICAL COMMUNICATIONS, 48, 22, 2812, 2814, 2012, [Peer-reviewed]
English, Scientific journal - Chirality sensing based on changes in conformation of dynamic terephthalamide hosts: Propeller-, double-arm-, and figure-of-eight-shaped hosts
Ryo Katoono, Hidetoshi Kawai, Kenshu Fujiwara, Takanori Suzuki
Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry, 70, 6, 640, 650, 2012
Japanese - Hysteretic Tricolor Electrochromic Systems Based on the Dynamic Redox Properties of Unsymmetrically Substituted Dihydrophenanthrenes and Biphenyl-2,2 '-Diyl Dications: Efficient Precursor Synthesis by a Flow Microreactor Method
Yusuke Ishigaki, Takanori Suzuki, Jun-ichi Nishida, Aiichiro Nagaki, Naofumi Takabayashi, Hidetoshi Kawai, Kenshu Fujiwara, Jun-ichi Yoshida
MATERIALS, 4, 11, 1906, 1926, Nov. 2011, [Peer-reviewed]
English, Scientific journal - Improved synthesis of C8-C20 segment of pectenotoxin-2
Kenshu Fujiwara, Yuki Suzuki, Nao Koseki, Shun-ichi Murata, Akio Murai, Hidetoshi Kawai, Takanori Suzuki
TETRAHEDRON LETTERS, 52, 43, 5589, 5592, Oct. 2011, [Peer-reviewed]
English, Scientific journal - 1,4-Diaryl-7,10-dimethoxyquinoxalino[2,3-b]quinoxalines and Their Dihydro Derivatives: Redox Switching of NIR Absorption and Fluorescence
Youhei Miura, Hidetoshi Kawai, Kenshu Fujiwara, Takanori Suzuki
CHEMISTRY LETTERS, 40, 9, 975, 977, Sep. 2011, [Peer-reviewed]
English, Scientific journal - Photophysical characteristics of 4,4 '-bis(N-carbazolyl)tolan derivatives and their application in organic light emitting diodes
Masakazu Ohkita, Ayataka Endo, Kimihiro Sumiya, Hajime Nakanotani, Takanori Suzuki, Chihaya Adachi
JOURNAL OF LUMINESCENCE, 131, 7, 1520, 1524, Jul. 2011, [Peer-reviewed]
English, Scientific journal - Synthesis of the C22-C37 segment of prorocentin
Atsushi Takemura, Yasushi Katagiri, Kenshu Fujiwara, Hidetoshi Kawai, Takanori Suzuki
TETRAHEDRON LETTERS, 52, 11, 1222, 1224, Mar. 2011, [Peer-reviewed]
English, Scientific journal - Construction of main-chain type oligorotaxanes and their switching properties: controlled dynamic behavior by imine-bonding formation and cleavage.
Sugino, H, Kawai, H, Fujiwara, K, Suzuki, T
Kobunshi Ronbunshu, 68, 12, 795, 803, The Society of Polymer Science, Japan, 2011, [Peer-reviewed]
English, Scientific journal, Imine-bridged pseudorotaxanes can be prepared by forming imine bonds between the diformyl hydrindacene axle and diamino-substituted macrocycles. Such pseudorotaxanes can be used as intermediates for a series of interlocked molecules with multiple rotaxane substructures, since they do not dethread under neutral or basic reaction conditions. Such imine-bridged oligorotaxanes were prepared by connecting the imine-bridged pseudorotaxane using a triethylene glycol spacer followed by introducing end-caps under basic conditions. The resulting oligorotaxanes with different subunit numbers were separated by GPC.
The imine-bridged oligorotaxanes are interconvertible with the hydrogen-bonded oligorotaxanes under acidic hydrolyzing conditions by using trifluoroacetic acid. Upon heating the hydrolyzed solution of the oligorotaxane, the imine-bridged oligorotaxane was regenerated since the bridged forms are the thermodynamically favored species. - ChemInform Abstract: Intramolecular Triarylmethane-Triarylmethylium Complex: Generation, Properties, and X-Ray Structure of a C-H-Bridged Carbocation
Takanori Suzuki, Takashi Takeda, Yasuyo Yoshimoto, Takayuki Nagasu, Hidetoshi Kawai, Kenshu Fujiwara
ChemInform, 41, 39, no, no, Wiley-Blackwell, 02 Sep. 2010, [Peer-reviewed]
Scientific journal - Total Synthesis and the Absolute Stereochemistry of Prorocentin
Katagiri Yasushi, Fujiwara Kenshu, Takemura Atsushi, Kawai Hidetoshi, Suzuki Takanori
Symposium on the Chemistry of Natural Products, symposium papers, 52, 187, 192, Symposium on the chemistry of natural products, 01 Sep. 2010
Japanese, Prorocentin, isolated from dinoflagellate Prorocentrum lima by Lu et al., exhibits inhibitory activity against some human cancer cell lines [IC_<50>: 16.7μg/mL (DLD-1); 83.67μg/mL (RPM17951)] and possesses an unique polyether structure, characterized by a [6,6]-spirocyclic acetal fused with an oxane ring (BCD-ring), an epoxide (A-ring), a five membered ether (E-ring) and a side chain including a conjugated triene group. Although the absolute configuration of prorocentin has not yet been determined, its biological and structural features make it an attractive synthetic target. Thus,a project toward the total synthesis of prorocentin aiming at determination of the absolute stereochemistry has been commenced. The partial relative structure of prorocentin was proposed by Lu et al. from their intensive NMR experiments, and a possible stereostructure was also shown as 1 in their report. Therefore, we first performed the total symthesis of 1. First, the C8-C20 segment (6) was synthesized from alkyne 7 and 8 via a process including Pd-catalyzed 6-endo cyclization. Aldehyde 6 was then connected with the C21-C35 segment(5), and the resulting alcohol was transformed to 27. The intramolecular double conjugate addition reaction of 27 produced the CD-ring spiroacetal (28), which was transformed to E-iodoalkene 4. The Suzuki-Miyaura coupling of 4 with dienylborane 3 followed by the removal of TBS groups and the concomitant epoxide fromation completed the total synthesis of 1. However, the ^1H and ^<13>C NMR spectra of 1 disagreed with those of natural prorocentin. Since the large deviations of chemical shifts between them were observed in the B-ring, we conferred with Lu on the deviations and deduced structure 2, having a hydroxy group at C17 of the B-ring, as a plausible structure of prorocentin. Thus, we next achieved the total synthesis of 2. The synthetic process was almost similar to that of 1, except the preparation of the B-ring (36), which was carried out by a process involving the aldol reaction of ketone 37 and 38. Finally, compound 2 showed the same spectral properties as natural prorocentin, except the opposite sign of optical rotation, thereby concluding that natural prorocentin is the enantiomer of 2. - Enhancement of transcriptional activity of mutant p53 tumor suppressor protein through stabilization of tetramer formation by calix[6]arene derivatives
Rui Kamada, Wataru Yoshino, Takao Nomura, Yoshiro Chuman, Toshiaki Imagawa, Takanori Suzuki, Kazuyasu Sakaguchi
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS, 20, 15, 4412, 4415, Aug. 2010
English, Scientific journal - Studies toward the total synthesis of armatol F: stereoselective construction of the C6 and C7 stereocenters and formation of the A-ring skeleton
Kenshu Fujiwara, Yuta Hirose, Daisuke Sato, Hidetoshi Kawai, Takanori Suzuki
TETRAHEDRON LETTERS, 51, 32, 4263, 4266, Aug. 2010, [Peer-reviewed]
English, Scientific journal - Model studies for the stereoselective construction of the BC-ring of armatol F based on Ireland-Claisen rearrangement and relay ring-closing olefin metathesis
Kenshu Fujiwara, Keita Tanaka, Yasushi Katagiri, Hidetoshi Kawai, Takanori Suzuki
TETRAHEDRON LETTERS, 51, 34, 4543, 4546, Aug. 2010, [Peer-reviewed]
English, Scientific journal - Intramolecular Chirality Transfer in trans-5,6-Diaryl-5,6-dihydro-1,10-phenanthroline-5,6-diols: Solvato- and Halochromic Responses by Circular Dichroism
Takanori Suzuki, Youhei Miura, Tatsuo Nehira, Hidetoshi Kawai, Kenshu Fujiwara
CHEMISTRY LETTERS, 39, 7, 695, 697, Jul. 2010, [Peer-reviewed]
English, Scientific journal - Intramolecular triarylmethane-triarylmethylium complex: Generation, properties, and X-ray structure of a C-H bridged carbocation
Takanori Suzuki, Takashi Takeda, Yasuyo Yoshimoto, Takayuki Nagasu, Hidetoshi Kawai, Kenshu Fujiwara
PURE AND APPLIED CHEMISTRY, 82, 4, 1033, 1044, Apr. 2010, [Peer-reviewed]
English, Scientific journal - Halochromic Chiroptical Response of Novel Bis(9-acridinyl)-type Fluorophores with a Helical pi Framework
Tatsuo Nehira, Yasuyo Yoshimoto, Kazuhisa Wada, Hidetoshi Kawai, Kenshu Fujiwara, Takanori Suzuki
CHEMISTRY LETTERS, 39, 3, 165, 167, Mar. 2010
English, Scientific journal - PHENANTHRENE-4,5-DIYLBIS(10-METHYLACRIDINIUM) WITH A SHORT C+ -- C+ CONTACT: PREPARATION, MOLECULAR STRUCTURE, REDOX PROPERTIES, AND ELECTROCHROMIC INTERCONVERSION WITH DIHYDROPYRENE DERIVATIVE
Takanori Suzuki, Yasuyo Yoshimoto, Kazuhisa Wada, Takashi Takeda, Hidetoshi Kawai, Kenshu Fujiware
HETEROCYCLES, 80, 1, 149, 155, Jan. 2010
English, Scientific journal - Drastic change in racemization barrier upon redox reactions: novel chiral-memory units based on dynamic redox systems
Takanori Suzuki, Kazuhisa Wada, Yusuke Ishigaki, Yasuyo Yoshimoto, Eisuke Ohta, Hidetoshi Kawai, Kenshu Fujiwara
CHEMICAL COMMUNICATIONS, 46, 23, 4100, 4102, 2010, [Peer-reviewed]
English, Scientific journal - PHENANTHRENE-4,5-DIYLBIS(10-METHYLACRIDINIUM) WITH A SHORT C+ -- C+ CONTACT: PREPARATION, MOLECULAR STRUCTURE, REDOX PROPERTIES, AND ELECTROCHROMIC INTERCONVERSION WITH DIHYDROPYRENE DERIVATIVE
Takanori Suzuki, Yasuyo Yoshimoto, Kazuhisa Wada, Takashi Takeda, Hidetoshi Kawai, Kenshu Fujiware
HETEROCYCLES, 80, 1, 149, 155, Jan. 2010, [Peer-reviewed]
English, Scientific journal - ChemInform Abstract: 4,5-Bis(diarylmethylene)-1,3-dithiole: A Novel Helical Electron Donor Exhibiting Electrochromic Behavior.
Takanori Suzuki, Shintaro Mikuni, Yusuke Ishigaki, Hiroki Higuchi, Hidetoshi Kawai, Kenshu Fujiwara
ChemInform, 40, 44, Wiley-Blackwell, 03 Nov. 2009, [Peer-reviewed]
Scientific journal - Dynamic Molecular Propeller: Supramolecular Chirality Sensing by Enhanced Chiroptical Response through the Transmission of Point Chirality to Mobile Helicity
Ryo Katoono, Hidetoshi Kawai, Kenshu Fujiwara, Takanori Suzuki
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 131, 46, 16896, 16904, Nov. 2009, [Peer-reviewed]
English, Scientific journal - Synthetic Studies on Armatol F, a Triterpene Fused-Polycyclhc Ether from the Red Alga Chondria armata
Fujiwara Kenshu, Hirose Yuta, Tanaka Keita, Katagiri Yasushi, Sato Daisuke, Kawai Hidetoshi, Suzuki Takanori
Symposium on the Chemistry of Natural Products, symposium papers, 51, 347, 352, Symposium on the chemistry of natural products, 01 Sep. 2009
Japanese, Armatol F (1), isolated from the red alga Chondria armata by Ciavatta et al., is an unusual triterpene compound characterized by the presence of an oxepane (A-ring), a 6/7/7 fusea-tricyclic ether (BCD-ring), six quaternary carbons, and two bromine atoms in its structure. It is also notable that 1 has a cis ring-fusion between C- and D-rings, which is a rare mode of ring-fusion in polycyclic ether natural procudts. The absolte configuraton of the A-ring and relative stereostructure of the BCD-ring have been elucidated by NMR and degradation studies, but the full absolute stereochemistry of 1 remains unclear. Although the bioactivity of 1 has not been reported, it is strongly expected that 1 would have some biological properties because of its striking structural similarity to bioactive thyrsiferol and the congeners. Since we have been interested in the structural complexity and the potential bioactivity of 1, we have been engaged in studies toward the total synthesis of 1 and the determination of its full absolute configuration. As a part of the studies, the model syntheses of the A and BCD-ring skeletons were performed. In the synthesis of A-ring model 16, a chirality transferring Ireland-Claisen rearrangement and a ring-closing olefin metathesis (RCM) were employed as key reactions for the construction of the oxepane skeleton, and the final bromination at C3 is now under investigation. BCD-ring model 18 was designed to be constructed from B-ring model 36 via a chirality transferring Ireland-Claisen rearrangement, an RCM, and Morimoto's intramolecular bromoetherification. At present, BC-ring 50, possessing a carbon chain corresponding to the D-ring, has been synthesized. The details of the model syntheses will be presented in the poster session. - Negligible diradical character for the ultralong C-C bond in 1,1,2,2-tetraarylpyracene derivatives at room temperature
Takashi Takeda, Hidetoshi Kawai, Rainer Herges, Eva Mucke, Yoshitaka Sawai, Kei Murakoshi, Kenshu Fujiwara, Takanori Suzuki
TETRAHEDRON LETTERS, 50, 26, 3693, 3697, Jul. 2009, [Peer-reviewed]
English, Scientific journal - Preparation and X-ray Structures of trans-5,6-Diaryl-5,6-dihydro-1,10-phenanthroline-5,6-diols: Formation of Supramolecular Rod by Hydrogen Bonds
Takanori Suzuki, Youhei Miura, Ryuuichi Tamaki, Hidetoshi Kawai, Kenshu Fujiwara
CHEMISTRY LETTERS, 38, 7, 670, 671, Jul. 2009, [Peer-reviewed]
English, Scientific journal - 4,5-Bis(diarylmethylene)-1,3-dithiole: A Novel Helical Electron Donor Exhibiting Electrochromic Behavior
Takanori Suzuki, Shintaro Mikuni, Yusuke Ishigaki, Hiroki Higuchi, Hidetoshi Kawai, Kenshu Fujiwara
CHEMISTRY LETTERS, 38, 7, 748, 749, Jul. 2009, [Peer-reviewed]
English, Scientific journal - Distorted Saturated Hydrocarbons
Kata Mlinarić-Majerski, Helena Dodziuk, Tatyana N. Gribanova, Vladimir I. Minkin, Ruslan M. Minyaev, Takanori Suzuki, Takashi Takeda, Hidetoshi Kawai, Kenshu Fujiwara, Vladimir Y. Lee, Akira Sekiguchi
Strained Hydrocarbons: Beyond the van-t Hoff and Le Bel Hypothesis, 33, 102, Wiley-VCH Verlag GmbH & Co. KGaA, 08 May 2009, [Peer-reviewed]
English, In book - Stereoselective construction of an anti-beta-alkoxy ether by Ireland-Claisen rearrangement for medium-ring ether synthesis
Kenshu Fujiwara, Natsumi Kawamura, Hidetoshi Kawai, Takanori Suzuki
TETRAHEDRON LETTERS, 50, 11, 1236, 1239, Mar. 2009, [Peer-reviewed]
English, Scientific journal - Strained Hydrocarbon (Chap 2.5 Ultralong C-C Bond)
Wiley-VCH, 2009 - Intramolecular Methylacridan-Methylacridinium Complexes with a Phenanthrene-4,5-diyl or Related Skeleton: Geometry-Property Relationships in Isolable C-H Bridged Carbocations
Takanori Suzuki, Yasuyo Yoshimoto, Takashi Takeda, Hidetoshi Kawai, Kenshu Fujiwara
CHEMISTRY-A EUROPEAN JOURNAL, 15, 9, 2210, 2216, 2009, [Peer-reviewed]
English, Scientific journal - Multi-Input/Multi-Output Molecular Response System Based on the Dynamic Redox Behavior of 3,3,4,4-Tetraaryldihydro[5]helicene Derivatives: Reversible Formation/Destruction of Chiral Fluorophore and Modulation of Chiroptical Properties by Solvent Polarity
Takanori Suzuki, Yusuke Ishigaki, Tomohiro Iwai, Hidetoshi Kawai, Kenshu Fujiwara, Hiroshi Ikeda, Yusuke Kano, Kazuhiko Mizuno
CHEMISTRY-A EUROPEAN JOURNAL, 15, 37, 9434, 9441, 2009, [Peer-reviewed]
English, Scientific journal - Entropy- and hydrolytic-driven positional switching of macrocycle between imine- and hydrogen-bonding stations in rotaxane-based molecular shuttles
Takeshi Umehara, Hidetoshi Kawai, Kenshu Fujiwara, Takanori Suzuki
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 130, 42, 13981, 13988, Oct. 2008, [Peer-reviewed]
English - P-82 Studies toward Total Synthesis of Prorocentin(Poster Presentation)
Fujiwara Kenshu, Katagiri Yasushi, Takemura Atsushi, Kawai Hidetoshi, Suzuki Takanori
Symposium on the Chemistry of Natural Products, symposium papers, 50, 783, 787, Symposium on the chemistry of natural products, 01 Sep. 2008
Japanese, Prorocentin, isolated from dinoflagellate Prorocentrum lima by Lu et al., exhibits inhibitory activity against some human cancer cell lines [IC_<50>: 16.7μg/mL (DLD-1); 83.6μg/mL (RPMI7951)] and possesses an unique polyether structure, featured by a [6,6]-spirocyclic acetal fused with an oxane ring (BCD-ring), an epoxide (A-ring), a five membered ether (E-ring), and a side chain including a conjugated triene group. Although the absolute configuration of prorocentin has not yet been determined, its biological and structural features make it an attractive synthetic target. Thus, a project toward the total synthesis of prorocentin aiming at determination of the absolute stereochemistry has been commenced. The partial relative stereochemistry of prorocentin was proposed by Lu et al. from their intensive NMR experiments, and a possible stereostructure was also shown as 1 in their report. Therefore, we first elucidated a synthetic plan for prorocentin based on the stereochemistry of 1. At the final stage in the synthesis, assembly of 1 from dienyl boran 2 and iodoalkene 3 via a Suzuki-Miyaura coupling followed by removal of TBS group and the simultaneous epoxide formation is intended. Iodoalkene 3 would be derived from C8-C35 segment 4 in a few steps including Takai olefination and protective group manipulation. So far, we have synthesized segments 2 and 4, and examined the above transformation processes (4→3 and 3+2→1) in a model system. Details of the synthesis of 4, based on 6-endo Utimoto cyclization to create the B-ring and intramolecular double conjugate addition to produce the CD-ring, and the model experiments will be described in the poster session. - Synthesis of the ABC-ring models of goniodomin A: preference for the unnatural configuration at C11 of the BC-ring in a non-macrocyclic model system
Takahiro Katagiri, Kenshu Fujiwara, Hidetoshi Kawai, Takanori Suzuki
TETRAHEDRON LETTERS, 49, 20, 3242, 3247, May 2008, [Peer-reviewed]
English, Scientific journal - Ultralong C-C bonds in hexaphenylethane derivatives
Takanori Suzuki, Takashi Takeda, Hidetoshi Kawai, Kenshu Fujiwara
PURE AND APPLIED CHEMISTRY, 80, 3, 547, 553, Mar. 2008, [Peer-reviewed]
English, Scientific journal - Concise stereoselective synthesis of cis-3-alkoxy-2-carbomethoxy medium-ring oxacycles from (R)-3-(3-butenyl)-4-propynoyloxazolidin-2-one
Daisuke Sato, Kenshu Fujiwara, Hidetoshi Kawai, Takanorl Suzuki
TETRAHEDRON LETTERS, 49, 9, 1514, 1517, Feb. 2008
English, Scientific journal - Synthesis of the DE-ring of goniodomin A and prediction of its natural relative stereochemistry
Takahiro Katagiri, Kenshu Fujiwara, Hidetoshi Kawai, Takanori Suzuki
TETRAHEDRON LETTERS, 49, 2, 233, 237, Jan. 2008
English, Scientific journal - Ultralong carbon-carbon bonds in dispirobis(10-methylacridan) derivatives with an acenaphthene, pyracene, or dihydropyracylene skeleton
Hidetoshi Kawai, Takashi Takeda, Kenshu Fujiwara, Makoto Wakeshima, Yukio Hinatsu, Takanori Suzuki
CHEMISTRY-A EUROPEAN JOURNAL, 14, 19, 5780, 5793, 2008, [Peer-reviewed]
English - Designed molecular propellers based on tetraarylterephthalamide and their chiroptical properties induced by biased helicity through transmission of point chirality
Ryo Katoono, Hidetoshi Kawai, Kenshu Fujiwara, Takanori Suzuki
CHEMICAL COMMUNICATIONS, 40, 4906, 4908, 2008, [Peer-reviewed]
English, Scientific journal - Unprecedented four-way-output molecular response system based on biphenyl-2,2 '-diyldiacridiniums: induction of axial chirality through intramolecular hydrogen bonds between chiral amide groups
Takanorl Suzuki, Kenji Ohta, Tatsuo Nehira, Hiroki Higuchi, Eisuke Ohta, Hidetoshi Kawai, Kenshu Fujiwara
TETRAHEDRON LETTERS, 49, 5, 772, 776, Jan. 2008, [Peer-reviewed]
English, Scientific journal - Four-way-output molecular response system based on the dihydrodibenzo[c,g]phenanthrene skeleton: modulation of CD and FDCD activity by acid and electron-transfer
Eisuke Ohta, Tatsuo Nehira, Hidetoshi Kawai, Kenshu Fujiwara, Takanori Suzuki
TETRAHEDRON LETTERS, 49, 5, 777, 781, Jan. 2008, [Peer-reviewed]
English, Scientific journal - Synthesis of the EF-ring of ciguatoxin 3C based on the [2,3]-Wittig rearrangement and ring-closing olefin metathesis
Akiyoshi Goto, Kenshu Fujiwara, Ayako Kawai, Hidetoshi Kawai, Takanori Suzuki
ORGANIC LETTERS, 9, 26, 5373, 5376, Dec. 2007, [Peer-reviewed]
English, Scientific journal - P-76 Synthesis of Acyclic Secondary Alkyl Ethers Based on Hetero Conjugate Addition and Chirality-Transferring Sigmatropic Rearrangement
Goto Akiyoshi, Fujiwara Kenshu, Kawai Ayako, Kawai Hidetoshi, Suzuki Takanori
Symposium on the Chemistry of Natural Products, symposium papers, 49, 703, 708, Symposium on the chemistry of natural products, 24 Aug. 2007
Japanese, Stereoselective construction of medium-sized cyclic ethers is one of the major problems in the synthesis of fused-polycyclic ether natural compounds, represented by ciguatoxin CTX3C. We have explored efficient solutions for the problem, and examined an application of a ring-closing olefin metathesis reaction (RCM), one of the most reliable methods for the formation of medium-ring structure, to cyclic ether synthesis. Although preparation of the precursors for RCM involved a serious difficulty in the stereoselective construction of their acyclic di-sec-alkyl ether part, we found its effective answers, namely, the [2,3]-Wittig rearrangement of a 3-alkoxyallyloxyacetic acid ester and the Ireland-Claisen rearrangement of a 3-alkoxyallyl glycolate. These rearrangement reactions stereoselectively produced 1,2-dialkoxy structures, which were easily transformed to medium cyclic ethers through a process including RCM. Details of the rearrangement reactions and the preparation method for the substrates using a hetero-conjugate addition reaction will be discussed at the presentation. The applications of these rearrangement reactions to the synthesis of the EF-ring of CTX3C will also be described. - Synthesis and relative stereochemistry of the A- and F-rings of goniodomin A
Kenshu Fujiwara, Jota Naka, Takahiro Katagiri, Daisuke Sato, Hidetoshi Kawai, Takanori Suzuki
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 80, 6, 1173, 1186, Jun. 2007
English, Scientific journal - Synthesis of the C8-C20 and C21-C30 segments of pectenotoxin 2
Kenshu Fujiwara, Yu-ichi Aki, Fuyuki Yamamoto, Mariko Kawamura, Masanori Kobayashi, Azusa Okano, Daisuke Awakura, Shunsuke Shiga, Akio Murai, Hidetoshi Kawai, Takanori Suzuki
TETRAHEDRON LETTERS, 48, 26, 4523, 4527, Jun. 2007, [Peer-reviewed]
English, Scientific journal - Electrochiroptical systems based on biphenyl-2,2 '-diyl-type dicationic dyes: strong chiroptical signals through the transmission of point chirality to axial chirality
Takanori Suzuki, Tomohiro Iwai, Eisuke Ohta, Hidetoshi Kawai, Kenshu Fujiwara
TETRAHEDRON LETTERS, 48, 20, 3599, 3603, May 2007, [Peer-reviewed]
English, Scientific journal - Chromic and fluorescence response system based on the dihydrophenanthroline-bipyridine skeleton: dynamic redox behavior and metal binding properties
Takanori Suzuki, Ryuuichi Tamaki, Eisuke Ohta, Takashi Takeda, Hidetoshi Kawai, Kenshu Fujiwara, Masako Kato
TETRAHEDRON LETTERS, 48, 22, 3823, 3827, May 2007, [Peer-reviewed]
English, Scientific journal - Dynamic redox systems as electrochromic materials: Bistability and advanced response
Takanori Suzuki, Eisuke Ohta, Hidetoshi Kawai, Kenshu Fujiwara, Takanori Fukushima
SYNLETT, 2007, 6, 851, 869, Apr. 2007, [Peer-reviewed]
English - Tetraaryl-o-quinodimethanes: Reductive Generation and Severely Distorted Geometry
Shinichi Iwashita, Takanori Suzuki
ChemInform, 38, 8, Wiley-Blackwell, Feb. 2007, [Peer-reviewed]
Scientific journal - Intramolecular triarylmethane-triarylmethylium complexes with a naphthalene-1,8-diyl skeleton: Isolation, structure, and reactivities of the C-H-bridged carbocations
Takashi Takeda, Hidetoshi Kawai, Kenshu Fujiwara, Takanori Suzuki
CHEMISTRY-A EUROPEAN JOURNAL, 13, 28, 7915, 7925, 2007, [Peer-reviewed]
English, Scientific journal - Multi-input-multi-output molecular response system based on dynamic redox behavior of hexaphenylethane-type electron donors with the tetrahydrophenanthrazepine skeleton: Strong chiroptical signals through the transmission of point chirality to helicity
Takanori Suzuki, Shoko Tanaka, Hidetoshi Kawai, Kenshu Fujiwara
CHEMISTRY-AN ASIAN JOURNAL, 2, 1, 171, 177, 2007, [Peer-reviewed]
English, Scientific journal - P-61 Synthetic Studies on Goniodomin A
Fujiwara Kenshu, Katagiri Takahiro, Naka Jota, Sato Daisuke, Kawai Hidetoshi, Suzuki Takanori
Symposium on the Chemistry of Natural Products, symposium papers, 48, 421, 426, Symposium on the chemistry of natural products, 15 Sep. 2006
Japanese, Goniodomin A (GDA) was isolated from dinoflagellate Alexandrium hiranoi as an antifungal agent by Murakami in 1988. Later, its particular bioactivities, such as modulation of actomyosin ATPase activities, increasing the filamentous actin content of human astronoma cells, and antiangiogenic activity via inhibition of actin reorganization in endothelial cells, were found. Although its detailed NMR data and unique planer structure featured by a 32-membered macrolactone including 5- and 6-membered cyclic ethers (the A-, D- and E-ring parts), a spirocyclic acetal (the BC-ring part), and a 6-membered cyclic hemiacetal (the F-ring part) were reported, the stereochemistry of GDA was unclear. Since the complex structure and the remarkable bioactivities of GDA prompted our synthetic interest, we started the program of its total synthesis aiming at determination of absolute stereochemistry. In this presentation, synthesis and stereochemical-elucidation of the A-, DE-, and F-ring parts of GDA will be disclosed. - P-409 Synthetic Studies on Goniodomin A
Katagiri Takahiro, Fujiwara Kenshu, Naka Jota, Kawai Hidetoshi, Suzuki Takanori
International Symposium on the Chemistry of Natural Products, 2006, "P, 409", Symposium on the chemistry of natural products, 23 Jul. 2006
English - P-408 Stereoselective Synthesis of the Nonanomeric Spirocyclic Acetal Part of Pectenotoxin 2
Fujiwara Kenshu, Okano Azusa, Aki Yu-ichi, Kawamura Mariko, Murai Akio, Kawai Hidetoshi, Suzuki Takanori
International Symposium on the Chemistry of Natural Products, 2006, "P, 408", Symposium on the chemistry of natural products, 23 Jul. 2006
English - Convergent synthesis of the common FGHI-ring part of ciguatoxins
Ayumi Takizawa, Kenshu Fujiwara, Eriko Doi, Akio Murai, Hidetoshi Kawai, Takanori Suzuki
TETRAHEDRON, 62, 31, 7408, 7435, Jul. 2006, [Peer-reviewed]
English - Dynamic Covalently Bonded Rotaxanes Cross-Linked by Imine Bonds between the Axle and Ring: Inverse Temperature Dependence of Subunit Mobility
Hidetoshi Kawai, Takeshi Umehara, Kenshu Fujiwara, Takashi Tsuji, Takanori Suzuki
Angew. Chem., 118, 26, 4387, 4392, Wiley-Blackwell, Jun. 2006, [Peer-reviewed]
Scientific journal - Change in conformation upon complexation of double-armed terephthalamide hosts: dynamic molecular recognition of ditopic guests with strong CD signaling
R Katoono, H Kawai, K Fujiwara, T Suzuki
TETRAHEDRON LETTERS, 47, 10, 1513, 1518, Mar. 2006, [Peer-reviewed]
English, Scientific journal - Dynamic covalently bonded rotaxanes cross-linked by imine bonds between the axle and ring: Inverse temperature dependence of subunit mobility
Hidetoshi Kawai, Takeshi Umehara, Kenshu Fujiwara, Takashi Tsuji, Takanori Suzuki
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 45, 26, 4281, 4286, 2006, [Peer-reviewed]
English, Scientific journal - Synthesis of the common FGHI-ring part of ciguatoxins
A Takizawa, K Fujiwara, E Doi, A Murai, H Kawai, T Suzuki
TETRAHEDRON LETTERS, 47, 5, 747, 751, Jan. 2006, [Peer-reviewed]
English, Scientific journal - The first stable tetraarylacenaphthenequinodimethanes exhibiting electrochromism with 'write-protect' option: preparation, highly deformed structure, and reversible interconversion with acenaphthylene-5,6-diyl dicationic dyes
T Suzuki, S Iwashita, T Yoshino, H Kawai, K Fujiwara, M Ohkita, T Tsuji, K Ono, M Takenaka
TETRAHEDRON LETTERS, 47, 4, 467, 471, Jan. 2006, [Peer-reviewed]
English, Scientific journal - Tetraaryl-o-quinodimethanes: Reductive generation and severely distorted geometry
Shinichi Iwashita, Takanori Suzuki
Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry, 64, 9, 958, 968, 2006, [Peer-reviewed]
Japanese, Scientific journal - Synthesis of the C42—C52 Part of Ciguatoxin CTX3C.
Daisuke Domon, Kenshu Fujiwara, Yuko Ohtaniuchi, Akihiro Takezawa, Sayaka Takeda, Hidekazu Kawasaki, Akio Murai, Hidethoshi Kawai, Takanori Suzuki
ChemInform, 37, 5, Wiley-Blackwell, Jan. 2006, [Peer-reviewed]
Scientific journal - Synthesis of (+)-Laurencin via Ring Expansion of a C-Glycoside Derivative.
Kenshu Fujiwara, Saori Yoshimoto, Ayumi Takizawa, Shin-ichiro Souma, Hirofumi Mishima, Akio Murai, Hidetoshi Kawai, Takanori Suzuki
ChemInform, 37, 3, Wiley-Blackwell, Jan. 2006, [Peer-reviewed]
Scientific journal - Convergent Synthesis of the IJKLM-Ring Part of Ciguatoxin CTX3C.
Daisuke Domon, Kenshu Fujiwara, Akio Murai, Hidethoshi Kawai, Takanori Suzuki
ChemInform, 37, 5, Wiley-Blackwell, Jan. 2006, [Peer-reviewed]
Scientific journal - Exceptionally large difference in bond length among conformational isomorphs of a hexaphenylethane derivative with a dispiropyracene skeleton
H Kawai, T Takeda, K Fujiwara, T Inabe, T Suzuki
CRYSTAL GROWTH & DESIGN, 5, 6, 2256, 2260, Nov. 2005
English, Scientific journal - Synthesis of the C42-C52 part of ciguatoxin CTX3C
D Domon, K Fujiwara, Y Ohtaniuchi, A Takezawa, S Takeda, H Kawasaki, A Murai, H Kawai, T Suzuki
TETRAHEDRON LETTERS, 46, 48, 8279, 8283, Nov. 2005, [Peer-reviewed]
English, Scientific journal - Convergent synthesis of the IJKLM-ring part of ciguatoxin CTX3C
D Domon, K Fujiwara, A Murai, H Kawai, T Suzuki
TETRAHEDRON LETTERS, 46, 48, 8285, 8288, Nov. 2005, [Peer-reviewed]
English, Scientific journal - Synthesis of (+)-laurencin via ring expansion of a C-glycoside derivative
K Fujiwara, S Yoshimoto, A Takizawa, S Souma, H Mishima, A Murai, H Kawai, T Suzuki
TETRAHEDRON LETTERS, 46, 40, 6819, 6822, Oct. 2005, [Peer-reviewed]
English, Scientific journal - P-18 Branched Ether Formation from 4-Alkoxy-2-Trimethylsilyloxy-3-Butenenitrile Derivatives And Its Synthetic Application to Fused Cyclic Ethers
Takemura Atsushi, Fujiwara Kenshu, Murai Akio, Kawai Hidetoshi, Suzuki Takanori
Symposium on the Chemistry of Natural Products, symposium papers, 47, 493, 498, Symposium on the chemistry of natural products, 15 Sep. 2005
Japanese, Since trans-fused polycyclic ethers are often seen in potently bioactive natural products, such as ciguatoxin (1), they attract significant synthetic attention. So far, many approaches have been studied for their efficient construction. Among these approaches, a ring-closing olefin metathesis reaction (RCM) has now become one of the most reliable methods for the construction of medium-sized cyclic ethers. However, preparation of the precursors for RCM involves a serious difficulty of the stereoselective construction of their acyclic branched ether part. Therefore, we explored an efficient branched ether formation reaction. Here, BF_3・OEt_2 promoted site-selective reduction of 4-alkoxy-2-trimethylsilyloxy-3-butenenitrile (5), prepared through a process including intermolecular hetero-Michael reaction of a 2-butynoate ester derivative (3) with an alcohol (2), with R_3SiH or Bu_3SnH is disclosed, along with the efficient application to the synthesis of fused medium-ring ethers involving the EF-ring segment of CTX1B (1). - Isolation and low-temperature X-ray analysis of intramolecular triarylmethane-triarylmethylium complex: Preference for a C-H-bridged unsymmetric structure exhibiting a facile 1,5-hydride shift and charge-transfer interaction
H Kawai, T Takeda, K Fujiwara, T Suzuki
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 127, 35, 12172, 12173, Sep. 2005, [Peer-reviewed]
English, Scientific journal - Synthesis of the EF-ring segment of ciguatoxin CTXIB based on novel regioselective reduction of unsaturated cyanohydrins and ring-closing olefin metathesis
A Takemura, K Fujiwara, K Shimawaki, A Murai, H Kawai, T Suzuki
TETRAHEDRON, 61, 31, 7392, 7419, Aug. 2005, [Peer-reviewed]
English - Tetracyanoanthraquinodimethanes with a chiral amide group: Preparation, properties, and charge-transfer photochirogenetic reaction with 1,2-dianisylacenaphthene-1,2-diol
T Suzuki, K Ichioka, H Higuchi, H Kawai, K Fujiwara, M Ohkita, T Tsuji, Y Takahashi
JOURNAL OF ORGANIC CHEMISTRY, 70, 14, 5592, 5598, Jul. 2005, [Peer-reviewed]
English, Scientific journal - Stereoselective synthesis of cis- and trans-2,3-disubstituted eight-membered medium-ring ethers based on Ireland-Claisen rearrangement of 3-alkoxy-2-propenyl glycolate esters and ring-closing olefin metathesis
K Fujiwara, A Goto, D Sato, H Kawai, T Suzuki
TETRAHEDRON LETTERS, 46, 20, 3465, 3468, May 2005, [Peer-reviewed]
English, Scientific journal - Stereospecific change in conformation upon complexation of an exoditopic tetraamide host with a bis(ammonium) guest: chiral recognition and strong CD signaling
R Katoono, H Kawai, K Fujiwara, T Suzuki
CHEMICAL COMMUNICATIONS, 41, 5154, 5156, 2005, [Peer-reviewed]
English, Scientific journal - Butane-1,4-diyl dications stabilized by steric factors: electrochiroptical response systems based on reversible interconversion between dihydro[5] helicene-type electron acceptors and electron- donating 1,1 '-binaphthyls
E Ohta, H Higuchi, H Kawai, K Fujiwara, T Suzuki
ORGANIC & BIOMOLECULAR CHEMISTRY, 3, 16, 3024, 3031, 2005
English, Scientific journal - Synthesis of the common left-half part of pectenotoxins
Fujiwara, K., Kobayashi, M., Yamamoto, F., Aki, Y.-I., Kawamura, M., Awakura, D., Amano, S., Okano, A., Murai, A., Kawai, H., Suzuki, T.
Tetrahedron Letters, 46, 30, 5067, 5069, 2005, [Peer-reviewed]
English, Scientific journal - Multipoint recognition of catecholamines by hydrindacene-based receptors accompanied by the complexation-induced conformational switching
H Kawai, R Katoono, K Fujiwara, T Tsuji, T Suzuki
CHEMISTRY-A EUROPEAN JOURNAL, 11, 3, 815, 824, Jan. 2005, [Peer-reviewed]
English, Scientific journal - Short nonbond and long C-C bond in naphthalene-1,8-diylbis(10-methylacridinium) and the corresponding hexaphenylethane derivative: a new electrochromic pair exhibiting dynamic redox properties
H Kawai, T Takeda, K Fujiwara, T Suzuki
TETRAHEDRON LETTERS, 45, 45, 8289, 8293, Nov. 2004, [Peer-reviewed]
English, Scientific journal - Dynamic redox systems based on bis(spiroxanthene)-type donors with a polycyclic aromatic hydrocarbon: preparation, X-ray structures, and electrochromic response with fluorescence change
T Suzuki, S Tanaka, H Higuchi, H Kawai, K Fujiwara
TETRAHEDRON LETTERS, 45, 46, 8563, 8567, Nov. 2004, [Peer-reviewed]
English, Scientific journal - [10]Paracyclophanediamides and their octadehydro derivatives: novel exotopic receptors with hydrogen-bonding sites on the bridge
R Katoono, H Kawai, K Fujiwara, T Suzuki
TETRAHEDRON LETTERS, 45, 46, 8455, 8459, Nov. 2004, [Peer-reviewed]
English, Scientific journal - 102(P-38) Convergent Synthesis of the ABCDE-ring part of ciguatoxin CTX3C
Fujiwara Kenshu, Goto Akiyoshi, Sato Daisuke, Ohtaniuchi Yuko, Tanaka Hideki, Murai Akio, Kawai Hidetoshi, Suzuki Takanori
Symposium on the Chemistry of Natural Products, symposium papers, 46, 587, 591, Symposium on the chemistry of natural products, 01 Oct. 2004
Japanese, CTX3C (1) was isolated as congener of ciguatoxin (CTX) from cultured dinoflagellate Gambierdiscus toxicus by the Yasumoto group. Its unique ladder-shaped trans-fused polycyclic structure possessing 13 ether rings is a synthetic challenge and has attracted the attention of synthetic chemists. During the course of our studies directed toward CTXs, we achieved the syntheses of their individual medium ring parts and developed a convergent method for the construction of their X/6/7/X ring systems. Here, we disclose alternative successful convergent construction of the ABCDE ring system 2 of 1 from the AB- and E-ring segments (5 and 6, respectively). Previously, effective convergent method applying coupling reaction of an acyl anion equivalent with an aldehyde followed by reductive cyclization reactions was developed for the synthesis of trans-fused tetracyclic ethers in this laboratory. Therefore, dimethyldithioacetal mono-S-oxide 5 and aldehyde 6 were selected as AB-and E-ring segments, respectively, in our synthetic plan for 1. The segment 5 was prepared in 16 steps from 7 in 12% total yield. The aldehyde 6 was synthesized in 20 steps from 16 in 38% total yield. Coupling reaction of deprotonated 5 with 6 followed by simultaneous removal of TBS and dithioacetal groups afforded ketodiol 4, which was subjected to reductive cyclization and the subsequent oxidation and deprotection to give 3. Hydroxy ketone 3 was efficiently cyclized into pentacyclic ether 35 under the similar reductive conditions as the cyclization of 4. Treatment of 35 with an excess amount of LDBB induced not only benzyl group detachment but also conversion of the PBBO group to a BnO group to produce 2 successfully. Thus, the ABCDE-ring part 2 was efficiently constructed in 10 steps from 6 in 11% total yield. - Novel branched ether formation via conjugate reduction of an unsaturated cyanohydrin derivative and its synthetic application to the EF-ring segment of ciguatoxin
A Takemura, K Fujiwara, A Murai, H Kawai, T Suzuki
TETRAHEDRON LETTERS, 45, 41, 7567, 7571, Oct. 2004, [Peer-reviewed]
English, Scientific journal - Formal Total Synthesis of Hemibrevetoxin B by a Convergent Strategy.
Kenshu Fujiwara, Daisuke Sato, Manabu Watanabe, Hiroshi Morishita, Akio Murai, Hidetoshi Kawai, Takanori Suzuki
ChemInform, 35, 43, Wiley-Blackwell, Oct. 2004, [Peer-reviewed]
Scientific journal - Convergent synthesis of the ABCDE-ring part of ciguatoxin CTX3C
K Fujiwara, A Goto, D Sato, Y Ohtaniuchi, H Tanaka, A Murai, H Kawai, T Suzuki
TETRAHEDRON LETTERS, 45, 38, 7011, 7014, Sep. 2004, [Peer-reviewed]
English, Scientific journal - Synthesis and characterization of hexakis(4-pyridylethynyl)benzene and hexakis(5-pyrimidylethynyl)benzene
M Ohkita, C Adachi, M Kawano, T Suzuki
HETEROCYCLES, 63, 7, 1537, 1540, Jul. 2004, [Peer-reviewed]
English, Scientific journal - Formal total synthesis of hemibrevetoxin B by a convergent strategy
K Fujiwara, D Sato, M Watanabe, H Morishita, A Murai, H Kawai, T Suzuki
TETRAHEDRON LETTERS, 45, 27, 5243, 5246, Jun. 2004, [Peer-reviewed]
English, Scientific journal - peri-Interaction between diarylmethyl and diarylmethylium units in 1,8-disubstituted naphthalenes: preference of localized structure for the C-H bridged carbocation
H Kawai, T Nagasu, T Takeda, K Fujiwara, T Tsuji, M Ohkita, JI Nishida, T Suzuki
TETRAHEDRON LETTERS, 45, 23, 4553, 4558, May 2004, [Peer-reviewed]
English, Scientific journal - Three-way-output response system by electric potential: UV-vis, CD, and fluorescence spectral changes upon electrolysis of the chiral ester of tetracyanoanthraquinodimethane
H Higuchi, K Ichioka, H Kawai, K Fujiwara, M Ohkita, T Tsuji, T Suzuki
TETRAHEDRON LETTERS, 45, 15, 3027, 3030, Apr. 2004, [Peer-reviewed]
English, Scientific journal - Positive homotropic allosteric binding of benzenediols in a hydrindacene-based exoditopic receptor: Cooperativity in amide hydrogen bonding
H Kawai, R Katoono, K Nishimura, S Matsuda, K Fujiwara, T Tsuji, T Suzuki
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 126, 16, 5034, 5035, Apr. 2004, [Peer-reviewed]
English, Scientific journal - Pyrazino-tetracyanonaphthoquinodimethanes: sterically deformed electron acceptors affording zwitterionic radicals
T Suzuki, S Miyanari, H Kawai, K Fujiwara, T Fukushima, T Miyashi, Y Yamashita
TETRAHEDRON, 60, 9, 1997, 2003, Feb. 2004, [Peer-reviewed]
English, Scientific journal - Preparation, properties, and X-ray structures of 5,5 '-bi(8-aminoquinoxalyl)s: novel Wurster-type electron donors with a heterobiaryl skeleton
T Suzuki, M Saito, H Kawai, K Fujiwara, T Tsuji
TETRAHEDRON LETTERS, 45, 2, 329, 333, Jan. 2004, [Peer-reviewed]
English, Scientific journal - First stable 7,7,8,8-tetraaryl-o-quinodimethane: isolation, X-ray structure, electrochromic response of 9,10-bis(dianisylmethylene)-9,10-dihydrophenanthrene
S Iwashita, E Ohta, H Higuchi, H Kawai, K Fujiwara, K Ono, M Takanaka, T Suzuki
CHEMICAL COMMUNICATIONS, 10, 18, 2076, 2077, 2004, [Peer-reviewed]
English, Scientific journal - Kinetic stabilization of the o-quinoidal 3,4-benzotropone system
M Ohkita, K Sano, K Ono, K Saito, T Suzuki, T Tsuji
ORGANIC & BIOMOLECULAR CHEMISTRY, 2, 17, 2421, 2425, 2004, [Peer-reviewed]
English, Scientific journal - pi-extended o-quinoidal tropone derivatives: experimental and theoretical studies of naphtho[2,3-c]tropone and anthro[2,3-c]tropone
M Ohkita, K Sano, T Suzuki, T Tsuji, T Sato, H Niino
ORGANIC & BIOMOLECULAR CHEMISTRY, 2, 7, 1044, 1050, 2004, [Peer-reviewed]
English, Scientific journal - First stable 7,7,8,8-tetraaryl-o-quinodimethane: isolation, X-ray structure, electrochromic response of 9,10-bis(dianisylmethylene)-9,10-dihydrophenanthrene
S Iwashita, E Ohta, H Higuchi, H Kawai, K Fujiwara, K Ono, M Takanaka, T Suzuki
CHEMICAL COMMUNICATIONS, 36, 18, 2076, 2077, 2004, [Peer-reviewed]
English, Scientific journal - Synthesis of the tricyclic dihydrofuran moiety of azadirachtin: efficient transformation of the Claisen rearrangement intermediate into a functionalized tricyclic dihydrofuran core
J Ishihara, Y Ikuma, S Hatakeyama, T Suzuki, A Murai
TETRAHEDRON, 59, 51, 10287, 10294, Dec. 2003, [Peer-reviewed]
English, Scientific journal - 4,7-bis(dimethylamino)benzimidazoles and twin-type derivatives: reversible two-stage redox system modulated by proton-transfer
T Suzuki, Y Tsubata, Y Obana, T Fukushima, T Miyashi, M Saito, H Kawai, K Fujiwara, K Akiyama
TETRAHEDRON LETTERS, 44, 43, 7881, 7884, Oct. 2003
English, Scientific journal - 95(P-26) Studies toward Convergent Total Synthesis of Hemibrevetoxin B
Fujiwara Kenshu, Watanabe Manabu, Sato Daisuke, Morishita Hiroshi, Murai Akio, Suzuki Takanori
Symposium on the Chemistry of Natural Products, symposium papers, 45, 561, 566, Symposium on the chemistry of natural products, 01 Sep. 2003
Japanese, Hemibrevetoxin B (1), isolated from the red tide dinoflagellate Gymnodinium breve by Shimizu group, is a trans-fused tetracyclic ether. To date, many research groups reported total synthesis of 1. Notably, most of them adopted a linear strategy, though a convergent strategy would have comparable efficiency with linear one even in the synthesis of such small polyether. In this context, we planned to synthesize 1 through a convergent strategy that would allow the large-scale preparation. During our studies, Holton group reported first convergent total synthesis of 1 very recently, where the ABCD ring part was constructed in 15 steps after connection of the cyclic A-ring part with the acyclic C12-C21 (BCD-ring) segment. Here, we disclose alternate successful convergent construction of the ABCD ring system 2 of 1 from the A- and D-ring segments (5 and 6, respectively). Previously, we developed an effective convergent method for the synthesis of trans-fused tetracyclic ethers adopting coupling reaction of an acyl anion equivalent with an aldehyde followed by reductive cyclization reactions. Therefore, dimethyldithioacetal mono-S-oxide 5 and aldehyde 6 were selected as A- and D-ring segments, respectively, in our synthetic plan for 1. The segment 5 was prepared in 14 steps from 2,4,6-tri-O-acetyl-D-glucal 7 in 14% total yield. The aldehyde 6 was synthesized in 19 steps from γ-butyrolactone 14 in 11% total yield. Coupling reaction of deprotonated 5 with 6 followed by simultaneous removal of TBS and dithioacetal groups afforded ketodiol 4, which was subjected to reductive cyclization, oxidation, and deprotection to give 3. Formation of cyclic S,O-acetal 34 from 3 followed by oxidation with mCPBA and in situ treatment with AlMe_3 produced tetracyclic 2. Thus, the ABCD-ring part 2 was successfully constructed in 7 steps from 6 in 12% total yield. - A novel redox switch for fluorescence: drastic UV-vis and fluorescence spectral changes upon electrolysis of a hexaphenylethane derivative of 10,10 '-dimethylbiacridan
T Suzuki, A Migita, H Higuchi, H Kawai, K Fujiwara, T Tsuji
TETRAHEDRON LETTERS, 44, 36, 6837, 6840, Sep. 2003, [Peer-reviewed]
English, Scientific journal - A novel redox switch for fluorescence: drastic UV-vis and fluorescence spectral changes upon electrolysis of a hexaphenylethane derivative of 10,10 '-dimethylbiacridan
T Suzuki, A Migita, H Higuchi, H Kawai, K Fujiwara, T Tsuji
TETRAHEDRON LETTERS, 44, 36, 6837, 6840, Sep. 2003, [Peer-reviewed]
English, Scientific journal - Electrochiroptical response of 2,2 '-(2,2-diarylethenyl)binaphthyl-type electron donors that undergo reversible C-C bond formation/breaking upon two-electron transfer
H Higuchi, E Ohta, H Kawai, K Fujiwara, T Tsuji, T Suzuki
JOURNAL OF ORGANIC CHEMISTRY, 68, 17, 6605, 6610, Aug. 2003, [Peer-reviewed]
English, Scientific journal - Formation of keto-carbeniums from 1,2,2-triarylacenaphthen-1-ols by breaking a long C-C bond: unusual alcohol protonolysis accompanied by formal hydride abstraction
T Suzuki, T Nagasu, H Kawai, K Fujiwara, T Tsuji
TETRAHEDRON LETTERS, 44, 32, 6095, 6098, Aug. 2003, [Peer-reviewed]
English, Scientific journal - Formation of keto-carbeniums from 1,2,2-triarylacenaphthen-1-ols by breaking a long C-C bond: unusual alcohol protonolysis accompanied by formal hydride abstraction
T Suzuki, T Nagasu, H Kawai, K Fujiwara, T Tsuji
TETRAHEDRON LETTERS, 44, 32, 6095, 6098, Aug. 2003, [Peer-reviewed]
English, Scientific journal - Dynamic Redox Systems: Toward the Realization of Unimolecular Memory
Takanori Suzuki, Hiroki Higuchi, Takashi Tsuji, Jun-ichi Nishida, Yoshiro Yamashita, Tsutomu Miyashi
ChemInform, 34, 23, Wiley-Blackwell, 10 Jun. 2003, [Peer-reviewed]
Scientific journal - Chiral electron donors and acceptors: novel "electrochiroptical" response
T Suzuki, J Nishida, E Hirota, M Ohkita, T Tsuji
SYNTHETIC METALS, 133, 357, 358, Mar. 2003
English, Scientific journal - Dynamic redox systems: Toward the realization of unimolecular memory
Suzuki, T., Higuchi, H., Tsuji, T., Nishida, J.-I., Yamashita, Y., Miyashi, T.
Springer Series in Chemical Physics, 70, 3, 24, Springer Series in Chemical Physics, 22 Jan. 2003, [Peer-reviewed]
Scientific journal - Suzuki, T.; Higuchi, H.; Tsuji, T.; Nishida, J.; Yamashita, Y.; Miyashi, T.: Dynamic Redox Systems: Toward the Realization of Unimolecular Memory, 3-24 (Nakamura, T.; Matsumoto, T.; Tada, H.; Sugiura, K. "Chemistry of Nanomolecular Systems", Springer, ・・・
2003
Suzuki, T.; Higuchi, H.; Tsuji, T.; Nishida, J.; Yamashita, Y.; Miyashi, T.: Dynamic Redox Systems: Toward the Realization of Unimolecular Memory, 3-24 (Nakamura, T.; Matsumoto, T.; Tada, H.; Sugiura, K. "Chemistry of Nanomolecular Systems", Springer, Berlin) (2003) - Functionalization and kinetic stabilization of the [4]paracyclophane system and aromaticity of its extremely bent benzene ring
T Tsuji, M Okuyama, M Ohkita, H Kawai, T Suzuki
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 125, 4, 951, 961, Jan. 2003, [Peer-reviewed]
English, Scientific journal - Electrochiroptical response of a hexaarylethane derivative with a helical ??-skeleton: drastic UV???Vis and CD spectral changes upon electrolysis of 4???,5???-dibromodispiro[xanthene-9,9???(9???H,10???H)-phenanthrene-10???,9???-xanthene]
Takanori Suzuki, Rie Yamamoto, Hiroki Higuchi, Erika Hirota, Masakazu Ohkita, Takashi Tsuji
J. Chem. Soc., Perkin Trans. 2, 11, 1937, 1942, Royal Society of Chemistry ({RSC}), 03 Oct. 2002, [Peer-reviewed]
Scientific journal - ChemInform Abstract: A Novel Class of Molecular Response Systems Based on Hexaphenylethane-Type Electron Donors
Jun-ichi Nishida, Takanori Suzuki, Takashi Tsuji
ChemInform, 33, 26, no, no, Wiley-Blackwell, 02 Jul. 2002, [Peer-reviewed]
Scientific journal - Electrochiroptical response of a hexaarylethane derivative with a helical pi-skeleton: drastic UV-Vis and CD spectral changes upon electrolysis of 4 ',5 '-dibromodispiro[xanthene-9,9 '(9 ' H, 10 ' H)-phenanthrene-10 ',9 ''-xanthene]
T Suzuki, R Yamamoto, H Higuchi, E Hirota, M Ohkita, T Tsuji
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2, 11, 1937, 1942, 2002, [Peer-reviewed]
English, Scientific journal - A novel class of molecular response systems based on hexaphenylethane-type electron donors
J Nishida, T Suzuki, T Tsuji
JOURNAL OF SYNTHETIC ORGANIC CHEMISTRY JAPAN, 60, 1, 40, 51, Jan. 2002, [Peer-reviewed]
Japanese, Scientific journal - A novel class of molecular response systems based on hexaphenylethane-type electron donors
Jun-Ichi Nishida, Takanori Suzuki, Takashi Tsuji
Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry, 60, 1, 40, 51, Society of Synthetic Organic Chemistry, 2002, [Peer-reviewed]
Japanese, Scientific journal - Supramolecular graphyne: a C(sp)-H center dot center dot center dot N hydrogen-bonded unique network structure of 2,4,6-triethynyl-1,3,5-triazine
M Ohkita, M Kawano, T Suzuki, T Tsuji
CHEMICAL COMMUNICATIONS, 24, 3054, 3055, 2002, [Peer-reviewed]
English, Scientific journal - Preparation, structure, and amphoteric redox properties of p-phenylenediamine-type dyes fused with a chalcogenadiazole unit
T Suzuki, T Tsuji, T Okubo, A Okada, Y Obana, T Fukushima, T Miyashi, Y Yamashita
JOURNAL OF ORGANIC CHEMISTRY, 66, 26, 8954, 8960, Dec. 2001, [Peer-reviewed]
English, Scientific journal - Experimental and computational studies of naphtho[2,3-c]tropone: a highly polarized novel troponid system
M Ohkita, K Sano, T Suzuki, T Tsuji
TETRAHEDRON LETTERS, 42, 41, 7295, 7297, Oct. 2001, [Peer-reviewed]
English, Scientific journal - Polar assembly of 2,6-diethynylpyridine through C(sp(2))-H center dot center dot center dot N, C(sp)-H center dot center dot center dot pi and pi-pi stacking interactions: Crystal structure and nonlinear optical properties
M Ohkita, T Suzuki, K Nakatani, T Tsuji
CHEMISTRY LETTERS, 10, 988, 989, Oct. 2001, [Peer-reviewed]
English, Scientific journal - A Redox Switch Based on Dihydro[5]helicene: Drastic Chiroptical Response Induced by Reversible C−C Bond Making/Breaking upon Electron Transfer
Jun-ichi Nishida, Takanori Suzuki, Masakazu Ohkita, Takashi Tsuji
Angew. Chem., 113, 17, 3351, 3354, Wiley-Blackwell, 03 Sep. 2001, [Peer-reviewed]
Scientific journal - Low-temperature X-ray structural analysis of propanedinitrile derivatives substituted with a bis(4-dimethylaminophenyl)methyl group: the origin of elongation of the donor-acceptor substituted C-C bond
T Suzuki, K Ono, H Kawai, T Tsuji
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2, 9, 1798, 1801, Sep. 2001, [Peer-reviewed]
English, Scientific journal - Dual-mode electrochromism switched by proton transfer: dynamic redox properties of bis(diarylmethylenium)-type dyes
T Suzuki, H Higuchi, M Ohkita, T Tsuji
CHEMICAL COMMUNICATIONS, 17, 1574, 1575, Sep. 2001, [Peer-reviewed]
English, Scientific journal - Crystal engineering using very short and linear C(sp)-H center dot center dot center dot N hydrogen bonds: formation of head-to-tail straight tapes and their assembly into nonlinear optical polar crystals
M Ohkita, T Suzuki, K Nakatani, T Tsuji
CHEMICAL COMMUNICATIONS, 16, 1454, 1455, Aug. 2001, [Peer-reviewed]
English, Scientific journal - ChemInform Abstract: Preparation, X-Ray Structures and Unique Redox Reactions of Novel 2,2′-(2,2-Dimethylpropane-1,3-diylidene)bis(1,3-benzodithiole)-type Electron Donors Fused with a Naphthalene Ring.
Takanori Suzuki, Tsuyoshi Yoshino, Masakazu Ohkita, Takashi Tsuji
ChemInform, 32, 7, no, no, Wiley-Blackwell, Feb. 2001, [Peer-reviewed]
Scientific journal - Generation and amphoteric redox properties of novel neutral radicals with the TTF-TCNQ hybrid structure
T Suzuki, M Yamada, M Ohkita, T Tsuji
HETEROCYCLES, 54, 1, 387, 394, Jan. 2001
English, Scientific journal - Single-component organic semiconductors based on novel radicals that exhibit electrochemical amphotericity: Preparation, crystal structures, and solid-state properties of N,N '-dicyanopyrazinonaphthoquinodiiminides substituted with an N-alkylpyridinium unit
T Suzuki, S Miyanari, Y Tsubata, T Fukushima, T Miyashi, Y Yamashita, K Imaeda, T Ishida, T Nogami
JOURNAL OF ORGANIC CHEMISTRY, 66, 1, 216, 224, Jan. 2001, [Peer-reviewed]
English, Scientific journal - A redox switch based on dihydro[5]helicene: Drastic chiroptical response induced by reversible C-C bond making/breaking upon electron transfer
J Nishida, T Suzuki, M Ohkita, T Tsuji
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 40, 17, 3251, +, 2001, [Peer-reviewed]
English, Scientific journal - Generation and amphoteric redox properties of novel neutral radicals with the TTF-TCNQ hybrid structure
T Suzuki, M Yamada, M Ohkita, T Tsuji
HETEROCYCLES, 54, 1, 387, 394, Jan. 2001, [Peer-reviewed]
English, Scientific journal - Kinetic stabilization of the [1.1]paracyclophane system: Isolation and X-ray structural analysis of a [1.1]paracyclophane derivative and its interconversion with the transannular adduct
H Kawai, T Suzuki, M Ohkita, T Tsuji
CHEMISTRY-A EUROPEAN JOURNAL, 6, 22, 4177, 4187, Nov. 2000, [Peer-reviewed]
English, Scientific journal - Kinetic stabilization of the [1.1]paracyclophane system: Isolation and X-ray structural analysis of a [1.1]paracyclophane derivative and its interconversion with the transannular adduct
H Kawai, T Suzuki, M Ohkita, T Tsuji
CHEMISTRY-A EUROPEAN JOURNAL, 6, 22, 4177, 4187, Nov. 2000, [Peer-reviewed]
English, Scientific journal - Kinetic stabilization of the [1.1]paracyclophane system: Isolation and X-ray structural analysis of a [1.1]paracyclophane derivative and its interconversion with the transannular adduct
H Kawai, T Suzuki, M Ohkita, T Tsuji
CHEMISTRY-A EUROPEAN JOURNAL, 6, 22, 4177, 4187, Nov. 2000, [Peer-reviewed]
English, Scientific journal - ChemInform Abstract: A 2,3,5,6-Tetramethylenebicyclo[2.2.0]hexane Derivative: A Novel Bisdiene Molecule That Produces a Dewar Benzene Skeleton Upon Two Successive Diels-Alder Reactions with Dienophiles.
Masakazu Ohkita, Kieko Sano, Sotoyuki Dohba, Yuko Fujita, Takanori Suzuki, Takashi Tsuji
ChemInform, 31, 41, no, no, Wiley-Blackwell, 10 Oct. 2000, [Peer-reviewed]
Scientific journal - Preparation, structure, and unique redox properties of mono-, bis-, and tris(diarylmethylene)-1,3,5-trithianes and related compounds
T Suzuki, T Yoshino, J Nishida, M Ohkita, T Tsuji
JOURNAL OF ORGANIC CHEMISTRY, 65, 18, 5514, 5521, Sep. 2000, [Peer-reviewed]
English, Scientific journal - Preparation and molecular structures of 9,10-dihydrophenanthrenes: Substituent effects on the long bond length
T Suzuki, K Ono, J Nishida, H Takahashi, T Tsuji
JOURNAL OF ORGANIC CHEMISTRY, 65, 16, 4944, 4948, Aug. 2000, [Peer-reviewed]
English, Scientific journal - Syntheses of acetylenic oligophenylene macrocycles based on a novel Dewar benzene building block approach
M Ohkita, K Ando, T Suzuki, T Tsuji
JOURNAL OF ORGANIC CHEMISTRY, 65, 14, 4385, 4390, Jul. 2000, [Peer-reviewed]
English, Scientific journal - ChemInform Abstract: Synthesis and Reaction of 1,4-Acetal-Bridged 2,3,5,6-Tetramethylidenebicyclo[2.2.0]hexane: The First Diels-Alder Route to Dewar Benzenes.
Masakazu Ohkita, Takanori Suzuki, Takashi Tsuji
ChemInform, 31, 2, no, no, Wiley-Blackwell, 11 Jan. 2000, [Peer-reviewed]
Scientific journal - ChemInform Abstract: Supramolecular Aggregation of m-Nitrobenzoic Acid by C-H×××O and O-H×××O Hydrogen Bondings in the Crystalline Charge-Transfer Complexes with Aromatic Hydrocarbons.
Takanori Suzuki, Takashi Tsuji, Takanori Fukushima, Setsuko Miyanari, Tsutomu Miyashi, Yasuyuki Sakata, Tsutomu Kouda, Hiroki Kamiyama
ChemInform, 31, 2, no, no, Wiley-Blackwell, 11 Jan. 2000, [Peer-reviewed]
Scientific journal - Preparation, structure, and redox reactions of nine-membered cyclic peroxides: A novel electrochromic system undergoing reversible extrusion and trapping of O-2
T Suzuki, J Nishida, M Ohkita, T Tsuji
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 39, 10, 1804, +, 2000, [Peer-reviewed]
English, Scientific journal - Preparation, X-ray structures and unique redox reactions of novel 2,2 '-(2,2-dimethylpropane-1,3-diylidene)bis(1,3-benzodithiole)-type electron donors fused with a naphthalene ring
T Suzuki, T Yoshino, M Ohkita, T Tsuji
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1, 20, 3417, 3420, 2000, [Peer-reviewed]
English, Scientific journal - First Dewar benzene approach to acetylenic oligophenylene macrocycles: synthesis and structure of a molecular rectangle bearing two spindles
M Ohkita, K Ando, K Yamamoto, T Suzuki, T Tsuji
CHEMICAL COMMUNICATIONS, 1, 83, 84, 2000, [Peer-reviewed]
English, Scientific journal - ChemInform Abstract: Preparation, Structure, and Unique Redox Properties of Mono-, Bis-, and Tris(diarylmethylene)-1,3,5-trithianes and Related Compounds.
Takanori Suzuki, Tsuyoshi Yoshino, Jun-ichi Nishida, Masakazu Ohkita, Takashi Tsuji
ChemInform, 31, 51, no, no, Wiley-Blackwell, 2000, [Peer-reviewed]
Scientific journal - A 2,3,5,6-tetramethylenebicyclo[2.2.0]hexane derivative: a novel bisdiene molecule that produces a Dewar benzene skeleton upon two successive Diels-Alder reactions with dienophiles
M Ohkita, K Sano, S Dohba, Y Fujita, T Suzuki, T Tsuji
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1, 12, 1971, 1975, 2000, [Peer-reviewed]
English, Scientific journal - Preparation, structure, and redox reactions of nine-membered cyclic peroxides: A novel electrochromic system undergoing reversible extrusion and trapping of O-2
T Suzuki, J Nishida, M Ohkita, T Tsuji
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 39, 10, 1804, +, 2000, [Peer-reviewed]
English, Scientific journal - Synthesis and reaction of 1,4-acetal-bridged 2,3,5,6-tetramethylidene-bicyclo[2.2.0]hexane: the first Diels-Alder route to Dewar benzenes
M Ohkita, T Suzuki, T Tsuji
CHEMICAL COMMUNICATIONS, 19, 1999, 2000, Oct. 1999, [Peer-reviewed]
English, Scientific journal - Supramolecular aggregation of m-nitrobenzoic acid by C-H - O and O-H - O hydrogen bondings in the crystalline charge-transfer complexes with aromatic hydrocarbons
T Suzuki, T Tsuji, T Fukushima, S Miyanari, T Miyashi, Y Sakata, T Kouda, H Kamiyama
JOURNAL OF ORGANIC CHEMISTRY, 64, 19, 7107, 7113, Sep. 1999, [Peer-reviewed]
English, Scientific journal - Photoinduced electron-transfer cope rearrangements of 3,6-diaryl-2,6- octadienes and 2,5-diaryl-3,4-dimethyl-1,5-hexadienes: Stereospecificity and an unexpected formation of the bicyclo[2.2.0]hexane Derivatives
Ikeda, H., Takasaki, T., Takahashi, Y., Konno, A., Matsumoto, M., Hoshi, Y., Aoki, T., Suzuki, T., Goodman, J.L., Miyashi, T.
Journal of Organic Chemistry, 64, 5, 1640, 1649, 05 Mar. 1999
Scientific journal - First stable tetracyanodiphenoquinodimethane with a completely planar geometry: Preparation, X-ray structure, and highly conductive complexes of bis[1,2,5]thiadiazolo-TCNDQ
Takanori Fukushima, Nobuharu Okazeri, Tsutomu Miyashi, Kazuharu Suzuki, Yoshiro Yamashita, Takanori Suzuki
Tetrahedron Letters, 40, 6, 1175, 1178, Elsevier {BV}, Feb. 1999
Scientific journal - Electrical and Nonlinear Optical Properties of Langmuir-Blodgett Films of Charge Transfer Complexes
Nakamura, T., Yumoto, T., Suzuki, T., Akutagawa, T., Hasegawa, T., Tachibana, H., Matsumoto, M., Horiuchi, S., Ikegami, H., Yamochi, H., Saito, G.
Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals, 327, 1999
Scientific journal - First stable tetracyanodiphenoquinodimethane with a completely planar geometry: Preparation, X-ray structure, and highly conductive complexes of bis[1,2,5]thiadiazolo-TCNDQ
Fukushima, T., Okazeri, N., Miyashi, T., Suzuki, K., Yamashita, Y., Suzuki, T.
Tetrahedron Letters, 40, 6, 1999
Scientific journal - A new type of tricolor electrochromic system based on the dynamic redox properties of hexaarylethane derivatives
T Suzuki, J Nishida, T Tsuji
CHEMICAL COMMUNICATIONS, 20, 2193, 2194, Oct. 1998, [Peer-reviewed]
English, Scientific journal - Biphenyl-type electron acceptors exhibiting dynamic redox properties: a novel electrochromic system with 'write protect' option
T Suzuki, H Takahashi, J Nishida, T Tsuji
CHEMICAL COMMUNICATIONS, 13, 1331, 1332, Jul. 1998, [Peer-reviewed]
English, Scientific journal - A kinetically stabilized [1.1]paracyclophane: Isolation and X-ray structural analysis
H Kawai, T Suzuki, M Ohkita, T Tsuji
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 37, 6, 817, 819, Apr. 1998, [Peer-reviewed]
English, Scientific journal - A kinetically stabilized [1.1]paracyclophane: Isolation and X-ray structural analysis
H Kawai, T Suzuki, M Ohkita, T Tsuji
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 37, 6, 817, 819, Apr. 1998, [Peer-reviewed]
English, Scientific journal - Ein kinetisch stabilisiertes [1.1]Paracyclophan – Isolierung und Röntgenstrukturanalyse
Hidetoshi Kawai, Takanori Suzuki, Masakazu Ohkita, Takashi Tsuji
Angewandte Chemie, 110, 6, 827, 829, Wiley-Blackwell, Mar. 1998, [Peer-reviewed]
Scientific journal - Isolation and X-ray structural determination of both folded and twisted conformers of bis{4H,8H-4-(dicyanomethylene)benzo[1,2-c:4,5-c']bis[1,2,5]thiadiazol-8-ylidene}, an overcrowded ethylene with high electron affinity
T Suzuki, T Fukushima, T Miyashi, T Tsuji
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH, 36, 22, 2495, 2497, Dec. 1997, [Peer-reviewed]
English, Scientific journal - Dibenzotetrathiafulvalenes inserted with cycloalkanes and their tricyclic valence isomers: reversible C-C bond making/breaking upon electron transfer
T Suzuki, M Kondo, T Nakamura, T Fukushima, T Miyashi
CHEMICAL COMMUNICATIONS, 23, 2325, 2326, Dec. 1997, [Peer-reviewed]
English, Scientific journal - Tricyclo[4.2.2.2(2,5)]dodeca-1,3,5,7,9,11-hexaene: generation and chemical trapping of the 3,4-dicyano derivative
T Tsuji, M Okuyama, M Ohkita, T Imai, T Suzuki
CHEMICAL COMMUNICATIONS, 22, 2151, 2152, Nov. 1997, [Peer-reviewed]
English, Scientific journal - Hexaphenylethane derivatives exhibiting novel electrochromic behavior
T Suzuki, J Nishida, T Tsuji
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH, 36, 12, 1329, 1331, Jul. 1997, [Peer-reviewed]
English, Scientific journal - Hexaphenylethan-Derivate mit neuartigem elektrochromem Verhalten
Takanori Suzuki, Jun-Ich Nishida, Takashi Tsuji
Angew. Chem., 109, 12, 1387, 1389, Wiley-Blackwell, Jun. 1997, [Peer-reviewed]
Scientific journal - Tetracyanoquinodimethanes Fused With A [1,2,5]Chalcogenadiazole Ring
Takanori Suzuki, Yoshiro Yamashita, Takanori Fukushima, Tustomu Miyashi
Molecular Crystals and Liquid Crystals, 296, 1997, [Peer-reviewed]
Scientific journal - Electronic structures and oxidation potentials of some azulene derivatives
T Kurihara, T Suzuki, H Wakabayashi, S Ishikawa, K Shindo, Y Shimada, H Chiba, T Miyashi, M Yasunami, T Nozoe
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 69, 7, 2003, 2008, Jul. 1996, [Peer-reviewed]
English, Scientific journal - Photoinduced skeletal rearrangement of 1,1-diarylspiropentanes
Y Takahashi, H Ohaku, S Morishima, T Suzuki, H Ikeda, T Miyashi
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1, 4, 319, 325, Feb. 1996, [Peer-reviewed]
English - Photoreactions of crystalline charge-transfer complexes
Suzuki, T.
Pure and Applied Chemistry, 68, 2, 1996
Scientific journal - ESR of the anion radical of 2,6-dithioxobenzo[1,2-d:4,5-d']bis[1,3] dithiol-4,8-dione. Observation of the satellites of O-17, C-13, and S-33 and the second-generation satellites due to both C-13 and S-33 in natural abundance
M Hirayama, T Terasaka, Y Yamashita, T Susuki, T Miyashi, Y Usui
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 68, 12, 3337, 3339, Dec. 1995, [Peer-reviewed]
English, Scientific journal - ESR OF THE TRIANION AND ANION-RADICALS OF BENZO[G][1,2,5]THIADIAZOLO[3,4-B]QUINOXALINE-5,10-DIONE AND ITS SELENIUM ANALOG
M HIRAYAMA, T TERASAKA, M ITASAKA, T SUZUKI, Y YAMASHITA, T MIYASHI
CHEMISTRY LETTERS, 9, 837, 838, Sep. 1995, [Peer-reviewed]
English, Scientific journal - PHOTOINDUCED SKELETAL REARRANGEMENT OF 1,1-DIPHENYLSPIROPENTANES
Y TAKAHASHI, H OHAKU, S MORISHIMA, T SUZUKI, T MIYASHI
TETRAHEDRON LETTERS, 36, 29, 5207, 5210, Jul. 1995, [Peer-reviewed]
English, Scientific journal - THE PI-TRIANION RADICAL OF 2,3,6,7-TETRACYANOBENZO[1,2-B/4,5-B']BISDITHIOLE-4,8-DIONE - OBSERVATION OF ESR WITH C-13-SATELLITES IN NATURAL-ABUNDANCE
M HIRAYAMA, M ITASAKA, T SUZUKI, Y YAMASHITA, T MIYASHI
CHEMISTRY LETTERS, 7, 511, 512, Jul. 1995, [Peer-reviewed]
English, Scientific journal - PHOTOINDUCED SKELETAL REARRANGEMENT OF 1,1-DIPHENYLSPIROPENTANES
Y TAKAHASHI, H OHAKU, S MORISHIMA, T SUZUKI, T MIYASHI
TETRAHEDRON LETTERS, 36, 29, 5207, 5210, Jul. 1995, [Peer-reviewed]
English, Scientific journal - Weak intermolecular interaction in crystal affecting the recognition properties and the solid-state reactivity
Takanori Suzuki
Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry, 53, 5, 403, 412, Yuki Gosei Kagaku Kyokai, 1995, [Peer-reviewed]
Japanese, Scientific journal - 2-(THIOPYRAN-4'-YLIDEN)-1,3-DITHIOLES FUSED WITH THIOPHENE UNITS - INTRAMOLECULAR S-S INTERACTION AFFECTING THE REDOX PROPERTIES AND MOLECULAR GEOMETRIES
T SUZUKI, T SAKIMURA, S TANAKA, Y YAMASHITA, H SHIOHARA, T MIYASHI
JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 12, 1431, 1432, Jun. 1994, [Peer-reviewed]
English, Scientific journal - AN ABSOLUTE ASYMMETRIC-SYNTHESIS OF THE [2+2] CYCLOADDUCT VIA SINGLE CRYSTAL-TO-SINGLE CRYSTAL TRANSFORMATION BY CHARGE-TRANSFER EXCITATION OF SOLID-STATE MOLECULAR-COMPLEXES COMPOSED OF ARYLOLEFINS AND BIS[1,2,5]THIADIAZOLOTETRACYANOQUINODIMETHANE
T SUZUKI, T FUKUSHIMA, Y YAMASHITA, T MIYASHI
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 116, 7, 2793, 2803, Apr. 1994, [Peer-reviewed]
English, Scientific journal - CYCLOREVERSION OF ARENE ENDOPEROXIDES INDUCED BY ELECTRON-TRANSFER
Y TAKAHASHI, S MORISHIMA, K WAKAMATSU, T SUZUKI, T MIYASHI
JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1, 13, 14, Jan. 1994, [Peer-reviewed]
English, Scientific journal - MOLECULAR RECOGNITION THROUGH C-H...O HYDROGEN-BONDING IN CHARGE-TRANSFER CRYSTALS - HIGHLY SELECTIVE COMPLEXATION OF 2,4,7-TRINITROFLUORENONE WITH 2,6-DIMETHYLNAPHTHALENE
T SUZUKI, H FUJII, T MIYASHI, Y YAMASHITA
JOURNAL OF ORGANIC CHEMISTRY, 57, 25, 6744, 6748, Dec. 1992, [Peer-reviewed]
English, Scientific journal - SINGLE-COMPONENT ORGANIC CONDUCTORS BASED ON NEUTRAL RADICALS CONTAINING THE PYRAZINO-TCNQ SKELETON
Y TSUBATA, T SUZUKI, T MIYASHI, Y YAMASHITA
JOURNAL OF ORGANIC CHEMISTRY, 57, 25, 6749, 6755, Dec. 1992, [Peer-reviewed]
English, Scientific journal - CRYSTAL-STRUCTURES OF METALLIC AND INSULATING MOLECULAR-COMPLEXES BETWEEN NAPHTHACENO[5,6-CD-11,12-C'D']BIS[1,2]DISELENOLE AND 4,8-BIS(DICYANOMETHYLENE)-4H,8H-BENZO[1,2-C-4,5-C']BIS[1,2,5]THIADIAZOLE - (TSEN)(BTDA-TCNQ) AND (TSEN)(BTDA-TCNQ)(C6H5CL)
K IWASAKI, A UGAWA, A KAWAMOTO, Y YAMASHITA, K YAKUSHI, T SUZUKI, T MIYASHI
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 65, 12, 3350, 3357, Dec. 1992, [Peer-reviewed]
English, Scientific journal - EVIDENCE FOR GENERATION OF ELECTRONICALLY EXCITED RADICAL ION IN VERY EXOTHERMIC ELECTRON-TRANSFER FLUORESCENCE QUENCHING
K KIKUCHI, T KATAGIRI, T NIWA, Y TAKAHASHI, T SUZUKI, H IKEDA, T MIYASHI
CHEMICAL PHYSICS LETTERS, 193, 1-3, 155, 160, May 1992, [Peer-reviewed]
English, Scientific journal - EVIDENCE FOR GENERATION OF ELECTRONICALLY EXCITED RADICAL ION IN VERY EXOTHERMIC ELECTRON-TRANSFER FLUORESCENCE QUENCHING
K KIKUCHI, T KATAGIRI, T NIWA, Y TAKAHASHI, T SUZUKI, H IKEDA, T MIYASHI
CHEMICAL PHYSICS LETTERS, 193, 1-3, 155, 160, May 1992, [Peer-reviewed]
English, Scientific journal - CLATHRATE FORMATION AND MOLECULAR RECOGNITION BY NOVEL CHALCOGEN CYANO INTERACTIONS IN TETRACYANOQUINODIMETHANES FUSED WITH THIADIAZOLE AND SELENADIAZOLE RINGS
T SUZUKI, H FUJII, Y YAMASHITA, C KABUTO, S TANAKA, M HARASAWA, T MUKAI, T MIYASHI
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 114, 8, 3034, 3043, Apr. 1992, [Peer-reviewed]
English, Scientific journal - TETRATHIENYLETHYLENES, A NEW CLASS OF ELECTRON-DONORS - DICATIONS TWISTED BY 90-DEGREES STABILIZED BY FORMATION OF POLYMETHINE UNITS
T SUZUKI, H SHIOHARA, M MONOBE, T SAKIMURA, S TANAKA, Y YAMASHITA, T MIYASHI
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH, 31, 4, 455, 458, Apr. 1992, [Peer-reviewed]
English, Scientific journal - TETRACYANOQUINODIMETHANES FUSED WITH 1,2,5-THIADIAZOLE AND PYRAZINE UNITS
Y TSUBATA, T SUZUKI, Y YAMASHITA, T MUKAI, T MIYASHI
HETEROCYCLES, 33, 1, 337, 348, Jan. 1992, [Peer-reviewed]
English, Scientific journal - Metallic behavior stable against Peierls instability in the one-dimensional organic conductor tetraselenotetracene-bis(1,2,5-thiadiazolo)tetracyanoquinodimethane [ (TSeT)-(BTDA-TCNQ)]
A. Ugawa, K. Iwasaki, A. Kawamoto, K. Yakushi, Y. Yamashita, T. Suzuki
Physical Review B, 43, 18, 14718, 14721, 1991, [Peer-reviewed]
English, Scientific journal - 4,7-Dimethyl-4,7-dihydro[1,2,5]thiadiazolo[3,4-b]-pyrazin, ein neuer Elektronendonor mit einem 12π-Elektronensystem
Yoshiro Yamashita, Junko Eguchi, Takanori Suzuki, Chizuko Kabuto, Tsutomu Miyashi, Shoji Tanaka
Angew. Chem., 102, 6, 709, 710, Wiley-Blackwell, Jun. 1990, [Peer-reviewed]
Scientific journal - 4,7-DIMETHYL-4,7-DIHYDRO[1,2,5]THIADIAZOLO[3,4-B]PYRAZINE, A NOVEL ELECTRON-DONOR WITH A 12-PI-ELECTRON RING-SYSTEM
Y YAMASHITA, J EGUCHI, T SUZUKI, C KABUTO, T MIYASHI, S TANAKA
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH, 29, 6, 643, 645, Jun. 1990, [Peer-reviewed]
English - BENZO[G][1,2,5]THIADIAZOLO[3,4-B]QUINOXALINE-5,10-DIONE AND ITS SELENIUM ANALOG - AN UNUSUAL TYPE OF QUINONES
Y YAMASHITA, Y TSUBATA, T SUZUKI, T MIYASHI, T MUKAI, S TANAKA
CHEMISTRY LETTERS, 3, 445, 448, Mar. 1990, [Peer-reviewed]
English, Scientific journal - A novel reaction of thiirane cation radicals in solution: The formation of 5,6-diphenyl-1,2,3,4-tetrathianes through trisulphurated thiirane cation radical intermediates
Kamata, M., Murayama, K., Suzuki, T., Miyashi, T.
Journal of the Chemical Society, Chemical Communications, 11, 1990
Scientific journal - 2,2'-(5,8-DIHYDROQUINOXALINE-5,8-DIYLIDENE)BIS(1,3-BENZODITHIOLE)S - A NEW TYPE OF ELECTRON-DONORS
Y YAMASHITA, T SUZUKI, T MIYASHI
CHEMISTRY LETTERS, 9, 1607, 1610, Sep. 1989, [Peer-reviewed]
English, Scientific journal - PREPARATION, PROPERTIES, AND CRYSTAL-STRUCTURE OF A 1,2,5-THIADIAZOLOTETRA-CYANOQUINODIMETHANE
T SUZUKI, Y YAMASHITA, C KABUTO, T MIYASHI
JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 16, 1102, 1103, Aug. 1989, [Peer-reviewed]
English, Scientific journal - PHOTOCYCLOADDITION REACTIONS OF TRICYCLO[3.3.1.0/2,8]NONA-3,6-DIEN-9-ONE (BARBARALONE) AND CARBONYL-COMPOUNDS
T MIYASHI, A KONNO, Y TAKAHASHI, A KANEKO, T SUZUKI, T MUKAI, N KOGA, H IWAMURA
TETRAHEDRON LETTERS, 30, 39, 5297, 5300, 1989, [Peer-reviewed]
English, Scientific journal - BEDT-TTF COMPLEXES WITH PERCYANO SUBSTITUTED ORGANIC-ANIONS
H YAMOCHI, T TSUJI, G SAITO, T SUZUKI, T MIYASHI, C KABUTO
SYNTHETIC METALS, 27, 1-2, A479, A484, Dec. 1988, [Peer-reviewed]
English, Scientific journal - CRYSTAL-STRUCTURE OF BENZENE-BIS[1,2,5]THIADIAZOLOTETRACYANOQUINODIMETHANE (BTDA) COMPLEX - A WEAK CHARGE-TRANSFER COMPLEX STABILIZED BY INCLUSION BEHAVIOR
T SUZUKI, C KABUTO, Y YAMASHITA, T MUKAI, T MIYASHI
JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 13, 895, 896, Jul. 1988, [Peer-reviewed]
English, Scientific journal - FORMATION AND SPIN-DENSITY DISTRIBUTION OF THE RADICAL-ANION AND RADICAL TRIANION OF BIS[DIPHENYLPYRADINO]TETRACYANOQUINODIMETHANE STUDIED BY ELECTRON-SPIN-RESONANCE
M HIRAYAMA, A SEKI, Y YAMASHITA, T SUZUKI, T MIYASHI
CHEMISTRY LETTERS, 5, 769, 772, May 1988, [Peer-reviewed]
English, Scientific journal - ELECTRON-SPIN-RESONANCE OBSERVATION OF THE RADICAL TRIANION AND RADICAL-ANION OF BIS(1,2,5-THIADIAZOLO)-TETRACYANOQUINODIMETHANE
M HIRAYAMA, A SEKI, Y YAMASHITA, T SUZUKI, T MIYASHI
JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 7, 490, 491, Apr. 1988, [Peer-reviewed]
English, Scientific journal - Bis([1,2,5]thiadiazolo)[3,4-b;3′,4′-e]pyrazin, ein neuer Heterocyclus mit 14 π-Elektronen und hoher Elektronenaffinität
Yoshiro Yamashita, Kenichi Saito, Takanori Suzuki, Chizuko Kabuto, Toshio Mukai, Tsutomu Miyashi
Angew. Chem., 100, 3, 428, 429, Wiley-Blackwell, Mar. 1988, [Peer-reviewed]
Scientific journal - BIS([1,2,5]THIADIAZOLO)[3,4-B-3',4'-E]PYRAZINE, A NOVEL 14-PI-ELECTRON HETEROCYCLE WITH HIGH ELECTRON-AFFINITY
Y YAMASHITA, K SAITO, T SUZUKI, C KABUTO, T MUKAI, T MIYASHI
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH, 27, 3, 434, 435, Mar. 1988, [Peer-reviewed]
English - A NEW TYPE OF TWO-DIMENSIONAL ORGANIC CONDUCTORS - ALKYLAMMONIUM BIS[1,2,5]THIADIAZOLOTETRACYANOQUINODIMETHANIDES
T SUZUKI, C KABUTO, Y YAMASHITA, T MUKAI, T MIYASHI, G SAITO
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 61, 2, 483, 493, Feb. 1988, [Peer-reviewed]
English, Scientific journal - PHOTOCYCLIZATION OF NORBORNADIENES FUSED WITH QUINONE UNITS
T SUZUKI, Y YAMASHITA, T MUKAI, T MIYASHI
TETRAHEDRON LETTERS, 29, 12, 1405, 1408, 1988, [Peer-reviewed]
English, Scientific journal - ELECTRON-SPIN-RESONANCE OF RADICAL-ANION AND RADICAL TRIANION OF [1,2,5]THIADIAZOLO-TETRACYANONAPHTHOQUINODIMETHANE
M HIRAYAMA, A SEKI, Y YAMASHITA, T SUZUKI, T MIYASHI
CHEMISTRY LETTERS, 1, 67, 70, Jan. 1988, [Peer-reviewed]
English, Scientific journal - ESR of radical anion and radical trianion of [1,2,5]thiadiazolo-tetracyanonaphthoquinodimethane.
Masatoshi Hirayama, Akihiko Seki, Yoshiro Yamashita, Takanori Suzuki, Tsutomu Miyashi
Chem. Lett., 1, 67, 70, Chemical Society of Japan, 1988, [Peer-reviewed]
Scientific journal - AN ANION RADICAL SALT OF A QUINONE FUSED WITH 1,3-DITHIOLE UNITS - CRYSTAL AND MOLECULAR-STRUCTURE OF A TETRAETHYLAMMONIUM SALT OF 2,6-DITHIOXOBENZO[1,2-D-4,5-D']- BIS[1,3]DITHIOLE-4,8-DIONE
T SUZUKI, C KABUTO, Y YAMASHITA, T MIYASHI
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 60, 9, 3459, 3461, Sep. 1987, [Peer-reviewed]
English - PREPARATION AND PROPERTIES OF THE DIANION AND THE DIHYDRO DERIVATIVE OF THE BIS[1,2,5]THIADIAZOLO DERIVATIVE OF TETRACYANOQUINODIMETHANE
Y YAMASHITA, T SUZUKI, T MUKAI
JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 15, 1184, 1185, Aug. 1987, [Peer-reviewed]
English, Scientific journal - CRYSTAL-STRUCTURE OF TTF.BTDA-TCNQ COMPLEX - A NEW TYPE OF CT COMPLEX WITH AN INCLUSION BEHAVIOR AND A MULTIDIMENSIONAL STRUCTURE
T SUZUKI, C KABUTO, Y YAMASHITA, T MUKAI
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 60, 6, 2111, 2115, Jun. 1987, [Peer-reviewed]
English, Scientific journal - PREPARATION, PROPERTIES, AND CRYSTAL-STRUCTURE OF [1,2,5]SELENADIAZOLOTETRACYANONAPHTHOQUINODIMETHAN
T SUZUKI, C KABUTO, Y YAMASHITA, T MUKAI
CHEMISTRY LETTERS, 6, 1129, 1132, 1987, [Peer-reviewed]
English, Scientific journal - NOVEL QUINONE-TYPE ACCEPTORS FUSED WITH SULFUR HETEROCYCLES AND THEIR HIGHLY CONDUCTIVE COMPLEXES WITH ELECTRON-DONORS
Y YAMASHITA, T SUZUKI, G SAITO, T MUKAI
JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 19, 1489, 1491, Oct. 1986, [Peer-reviewed]
English, Scientific journal - CRYSTAL AND MOLECULAR-STRUCTURE OF BIS-1,2,5-THIADIAZOLOTETRACYANO-QUINODIMETHANE - A NOVAL ACCEPTOR FORMING HIGHLY CONDUCTIVE COMPLEXES
C KABUTO, T SUZUKI, Y YAMASHITA, T MUKAI
CHEMISTRY LETTERS, 9, 1433, 1436, Sep. 1986, [Peer-reviewed]
English, Scientific journal - PREPARATION AND PROPERTIES OF TETRACYANOQUINODIMETHANS FUSED WITH PYRAZINE UNITS
Y YAMASHITA, T SUZUKI, G SAITO, T MUKAI
CHEMISTRY LETTERS, 5, 715, 718, May 1986, [Peer-reviewed]
English, Scientific journal - CRYSTAL-STRUCTURES OF MOLECULAR-COMPLEXES OF 2-CHLORO-11,11,12,12-TETRACYANOANTHRAQUINODIMETHANE WITH BENZENE (1-1) AND PYRENE (2-1) - A NOVEL TYPE OF CHARGE-TRANSFER COMPLEXES
C KABUTO, Y FUKAZAWA, T SUZUKI, Y YAMASHITA, T MIYASHI, T MUKAI
TETRAHEDRON LETTERS, 27, 8, 925, 928, 1986, [Peer-reviewed]
English, Scientific journal - CRYSTAL-STRUCTURES OF MOLECULAR-COMPLEXES OF 2-CHLORO-11,11,12,12-TETRACYANOANTHRAQUINODIMETHANE WITH BENZENE (1-1) AND PYRENE (2-1) - A NOVEL TYPE OF CHARGE-TRANSFER COMPLEXES
C KABUTO, Y FUKAZAWA, T SUZUKI, Y YAMASHITA, T MIYASHI, T MUKAI
TETRAHEDRON LETTERS, 27, 8, 925, 928, 1986, [Peer-reviewed]
English, Scientific journal - THE SYNTHESIS AND PROPERTIES OF 11, 11, 12, 12-TETRACYANOANTHRAQUINODIMETHAN AND ITS DERIVATIVES
Y NISHIZAWA, T SUZUKI, Y YAMASHITA, T MIYASHI, T MUKAI
NIPPON KAGAKU KAISHI, 5, 904, 909, 1985, [Peer-reviewed]
Japanese, Scientific journal - PREPARATION AND PROPERTIES OF A TETRACYANOQUINODIMETHANE FUSED WITH 1,2,5-THIADIAZOLE UNITS
Y YAMASHITA, T SUZUKI, T MUKAI, G SAITO
JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 15, 1044, 1045, 1985, [Peer-reviewed]
English, Scientific journal - HIGHLY CONDUCTIVE COMPLEXES OF BIS-1,2,5-THIADIAZOLO-TETRACYANOQUINODIMETHAN (BTDA-TCNQ) WITH AMINES
Y YAMASHITA, T SUZUKI, G SAITO, T MUKAI
CHEMISTRY LETTERS, 11, 1759, 1762, 1985, [Peer-reviewed]
English, Scientific journal - CHARGE-TRANSFER COMPLEXES OF 11,11,12,12-TETRACYANOANTHRAQUINODIMETHANS WITH VARIOUS DONORS
T MUKAI, T SUZUKI, Y YAMASHITA
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 58, 8, 2433, 2434, 1985, [Peer-reviewed]
English
Other Activities and Achievements
- Polyaryl-substituted Quinodimethane Derivatives with Unique Emission Properties Based on Multi-conformations in Pseudopolymorphs
菅原一真, 小野利和, 鈴木孝紀, 石垣侑祐, 基礎有機化学討論会要旨集, 31st (CD-ROM), 2021 - NIR Mechanochromic Luminescence of Bis(triarylmethylium)-type Macrocyclic Dications
石垣侑祐, 立花拓哉, 菊池モト, 菅原一真, 鈴木孝紀, 基礎有機化学討論会要旨集, 31st (CD-ROM), 2021 - Unique redox behavior of orthogonally twisted dications with multiple 14π-aromatic units
林裕貴, 鈴木孝紀, 石垣侑祐, 基礎有機化学討論会要旨集, 31st (CD-ROM), 2021 - Dynamic control of [n] acene structures upon electron transfer: hysteretic three-state redox interconversion accompanied by a change in NIR absorptions
張本尚, 菅原一真, 鈴木孝紀, 石垣侑祐, 基礎有機化学討論会要旨集, 31st (CD-ROM), 2021 - 癌細胞増殖抑制作用を持つボタンイボタケ由来パラターフェニル化合物の合成展開
藤原憲秀, 乗鞍敏夫, 佐藤たくと, 佐野勇介, 櫛部佳祐, 角田隆幸, 上遠野亮, 鈴木孝紀, 岩井邦久, 松江一, 秋田応用生命科学研究会第26回講演会, Nov. 2015
Japanese, Summary national conference - ガンバジュニンD,EおよびテレファンチンDの提出構造の合成
藤原憲秀, 櫛部佳祐, 佐藤たくと, 乗鞍敏夫, 上遠野亮, 鈴木孝紀, 松江一, 日本化学会講演予稿集, 94th, 4, 2014 - 水溶性置換基を導入したジアリールエテニル型動的酸化還元系の多重出力型エレクトロクロミズム挙動
上遠野亮, 花田佳祐, 日笠翔, 石垣侑祐, 藤原憲秀, 山田英俊, 鈴木孝紀, 基礎有機化学討論会要旨集, 24th, 424, 22 Aug. 2013
Japanese - p-ターフェニル天然物テレファンチンOの合成
藤原憲秀, 佐藤たくと, 佐野勇介, 乗鞍敏夫, 上遠野亮, 鈴木孝紀, 松江一, 日本化学会講演予稿集, 93rd, 4, 2013 - ペクテノトキシン2の構造活性相関研究
鈴木悠記, 藤原憲秀, 古関直, 上遠野亮, 鈴木孝紀, 乗鞍敏夫, 松江一, 天然有機化合物討論会講演要旨集(Web), 55th, 2013 - 非対称置換1,1,2,2‐テトラアリールピラセンのフローマイクロ合成:極度に伸長したC‐C結合の置換基効果
鈴木孝紀, 内村康人, 石垣侑祐, 上遠野亮, 藤原憲秀, 永木愛一郎, 吉田潤一, 基礎有機化学討論会要旨集, 23rd, 389, 05 Sep. 2012
Japanese - 5,6‐位に異なる置換基を有するアセナフテン誘導体の効率的なフローマイクロ合成と特異な分子構造
鈴木孝紀, 内村康人, 石垣侑祐, 上遠野亮, 藤原憲秀, 永木愛一郎, 吉田潤一, 化学系学協会北海道支部冬季研究発表会講演要旨集, 2012, 11, 31 Jan. 2012
Japanese - 貝毒ペクテノトキシン2の全合成
鈴木悠記, 藤原憲秀, 古関直, 菊地悠太, 村田俊一, 安藝祐一, 岡野梓, 山本冬樹, 河村真理子, 志賀俊介, 村井章夫, 上遠野亮, 河合英敏, 鈴木孝紀, 乗鞍敏夫, 松江一, 万有生命科学振興国際交流財団福岡シンポジウム, 22nd, 2012 - 三色エレクトロクロミズムを示す非対称ヘキサフェニルエタン誘導体:フローマイクロ法による効率合成と分子内不斉誘導
石垣侑祐, 河合英敏, 藤原憲秀, 鈴木孝紀, 永木愛一郎, 吉田潤一, 基礎有機化学討論会要旨集, 22nd, 423, 07 Sep. 2011
Japanese - 点不斉を持つ非対称ヘキサフェニルエタン誘導体:フローマイクロ法による効率合成と特異なエレクトロクロミズム挙動
石垣侑祐, 河合英敏, 藤原憲秀, 鈴木孝紀, 永木愛一郎, 吉田潤一, 日本化学会講演予稿集, 91st, 4, 1481, 11 Mar. 2011
Japanese - ペクテノトキシン2の全合成
藤原憲秀, 鈴木悠記, 古関直, 菊地悠太, 村田俊一, 安藝祐一, 山本冬樹, 河村真理子, 岡野梓, 村井章夫, 河合英敏, 鈴木孝紀, 乗鞍敏夫, 松江一, 天然有機化合物討論会講演要旨集, 53rd, 2011 - マイクロフロー法により効率合成が可能となった非対称ヘキサフェニルエタン誘導体の特異なエレクトロクロミズム挙動
石垣侑祐, 西田純一, 河合英敏, 藤原憲秀, 鈴木孝紀, 永木愛一郎, 高林尚史, 吉田潤一, 基礎有機化学討論会要旨集, 21st, 337, 02 Sep. 2010
Japanese - イミン架橋型ロタキサンの構築と加水分解平衡に与えるイミン架橋ステーションの構造的影響
河合英敏, 杉野寛佳, 梅原健志, 藤原憲秀, 鈴木孝紀, 基礎有機化学討論会予稿集, 2P062, 2008
Summary national conference - 新規ロタキサン構築法としてのイミン架橋型スレッディングの適用性調査
河合英敏, 杉野寛佳, 梅原健志, 藤原憲秀, 鈴木孝紀, 構造有機化学討論会要旨集, 1P-36, 2007
Summary national conference - Tetraaryl-o-quinodimethanes: Reductive generation and severely distorted geometry
Shinichi Iwashita, Takanori Suzuki, JOURNAL OF SYNTHETIC ORGANIC CHEMISTRY JAPAN, 64, 9, 958, 968, Sep. 2006
Japanese, Book review - Enantio- and stereocontrolled formation of the bisspiroacetal core of spirolide B
Ishihara, J., Ishizaka, T., Suzuki, T., Hatakeyama, S., Tetrahedron Letters, 45, 42, 7855, 7858, 2004 - ESR of the p-Radical Formed by Photoreduction of Bis(1,2,5-selenadiazolo)tetracyano-quinodimethane in Methanol. Observation of a Large 77Se Hfs
M. Hirayama T. Terasaka, Y. Morita, T. Suzuki, Y. Yamashita, T. Miyashi, Chem. Lett., 1995, 11, 1021, 1022, 1995
A large 77Se hfs was observed in the ESR spectrum of a radical generated by photoreduction of the electron acceptor, BSDA-TCNQ(3), with 355 nm laser irradiation in methanol. This spectrum was identified as the anion radical of a proton adduct of 3, which was supported by the MO calculation., The Chemical Society of Japan, English - Benzidine type electron donors fused with 1,2,5-chalcogenadiazole units
Suzuki, T., Okubo, T., Okada, A., Yamashita, Y., Miyashi, T., Heterocycles, 35, 1, 395, 406, 1993 - Preparation and properties of tetracyanoquinodimethane radical-anion salts with azaazulenium and diazaazulenium ions
Yamashita, Y., Suzuki, T., Kobayashi, Y., Mukai, T., Miyashi, T., Synthetic Metals, 45, 2, 213, 220, 1991 - Preparation and Crystal Structures of Tetracyanoquinodimethanes fused with [1,2,5]Selenadiazole Units
T. Suzuki, C. Kabuto, Y. Yamashita, G. Saito, T, Mukai, T. Miyashi, Chem. Lett., 11, 2285, 2288, 1987
The title electron acceptors, TSDA (2) and BSDA (3), were prepared which crystallize isomorphously with the sulfur analogue, BTDA (1). The molecular interactions are enhanced in 2 and 3 compared with 1, which connect the molecules to form two-dimensionally expanded "sheet-like" networks and their infinite layers., The Chemical Society of Japan, English - 芳香族環および複素環の縮合したテトラシアノキノジメタン類の合成と性質 (導電材料とその応用) -- (電子伝導)
山下 敬郎, 鈴木 孝紀, 向井 利夫, 日本化学会誌, 1986, 3, p268, 275, Mar. 1986
日本化学会, Japanese - The Synthesis and Properties of Tetracyanoquinodimethans Fused with Aromatic Rings and Heterocyclic Rings
Yamashita, Y., Suzuki, T., Mukai, T., Nippon Kagaku Kaishi, 1986, 3, 268, 275, 1986
Lectures, oral presentations, etc.
- 動的酸化還元系の化学 (特別講演)
鈴木孝紀
第32回基礎有機化学討論会, 20 Sep. 2022, Japanese, Keynote oral presentation
20 Sep. 2022 - 22 Sep. 2022, [Invited] - Hexaarylbutadienes Exhibiting NIR-electrochromism for the Development of H2S-Bioimaging and Photodynamic Therapy
Takanori Suzuki
19th International Symposnium on Novel Aromatic Compounds, 06 Jul. 2022, English, Invited oral presentation
03 Jul. 2022 - 08 Jul. 2022, [Invited] - Studies on Dynamic Redox Systems: Construction of Record-breaking Strained Compounds and Development of Unimolecular Memory
鈴木 孝紀
The 99th CSJ Annual Meeting, Award Lecutre,, 18 Mar. 2019, English - 超結合:共有結合の限界を超えた化学
鈴木 孝紀
日本化学会第99春季年会特別企画, 16 Mar. 2019, Japanese
Research Themes
- 含硫黄複素環類の近赤外エレクトロクロミズム:カルコゲン結合とバイオイメージング
科学研究費助成事業
Apr. 2025 - Mar. 2028
鈴木 孝紀
日本学術振興会, 基盤研究(C), 北海道大学, 25K08604 - 有機エレクトロクロミック物質の新展開:近赤外光スイッチによるバイオイメージング
科学研究費助成事業
01 Apr. 2020 - 31 Mar. 2025
鈴木 孝紀, 石垣 侑祐
生体内での硫化水素の局在と濃度を非侵襲的かつリアルタイムでイメージングする方法の開発は、病理学/医学の分野へと応用の期待される新技術となる。応募者らはこれまで、電位の入力によって近赤外(NIR)光領域の非常に大きな吸収体のON/OFFが可能な有機エレクトロクロミック物質を利用し、肝炎や癌などの様々な疾患との関わりの深い硫化水素をイメージングできる方法論の開発を行ってきた。今年度は、硫化水素はガス療法に有望であることが示されている点に注目し、硫化水素が腫瘍微小環境に影響を及ぼして強力な抗腫瘍免疫を誘導できるかどうかについては、依然として議論の余地があった。そこで本研究では、腫瘍を標的とし、腫瘍微小環境に応答性を示す新たな脂質ナノ粒子を開発した。これは、腫瘍組織特異的に硫化水素をデリバリーして組織内で放出することができる機能を持ち、光力学免疫療法も可能である。
新規ナノ粒子は、酸性の腫瘍微小環境中で pHに応じた硫化水素の一気放出を可能にし、粒子中の有機エレクトロクロミック材料を即座に還元する。その結果、近赤外蛍光と光線力学療法の活性が出現する。さらに、高レベル濃度の硫化水素が腫瘍間質液圧の低下、血管新生の促進、血管透過性の増加、低酸素症の改善、免疫抑制状態の軽減によって腫瘍微小環境中を再構築できることを見出したが、それにより、ナノ粒子の腫瘍取り込みが増加して光線力学療法の有効性が高まることで、808 nm レーザー照射中によって、細胞死が誘発された。新規ナノ粒子は硫化水素ガスと光線力学療法の相乗効果を可能にし、乳がん腫瘍を効果的に根絶することで、腫瘍の転移と再発を予防できることが明らかとなった。
日本学術振興会, 基盤研究(B), 北海道大学, 23K20275 - 有機エレクトロクロミック物質の新展開:近赤外光スイッチによるバイオイメージング
科学研究費助成事業 基盤研究(B)
01 Apr. 2020 - 31 Mar. 2025
鈴木 孝紀, 石垣 侑祐
研究計画に沿った研究実験を実施し、その実績について、”Generation of hydroxyl radical-activatable ratiometric near-infrared bimodal probes for early monitoring of tumor response to therapy.”L. Wu, Y. Ishigaki, W. Zeng, T. Harimoto, B. Yin, Y. Chen, S. Liao, Y. Liu, Y. Sun, X. Zhang, Y. Liu, Y. Liang, P. Sun, T. Suzuki, G. Song, Q. Fan, D. Ye, Nat. Commun. 2021, 12, 6145. [DOI: 10.1038/s41467-021-26380-y (open access)]の論文にて発表した。
上記論文では、生体内のヒドロキシラジカルを選択的に検知してイメージングを行う方法を開拓したものであり、ヘキサアリールブタジエン骨格に、適切なアルキル基の置換したアミノ基を導入した化合物が有効であった。またNIR蛍光によるイメージングに、NIR吸収に由来する光音響分光スペクトルを併用することで、定量性の高い手法として確立できた点は特筆に値する。
一方、物質開発については、ヘキサアリールブタジエンの基本骨格を持ちながらも、酸化還元に際して分子内に反芳香族性骨格であるチエピン、オキセピン骨格が生じることで、よりNIRの長波長部分に吸収をもつ化合物群についての検討を中心に進める計画であった。当該物質の合成には成功しており、今後そのスペクトル特性とイメージング法への応用へ進む段階である。
日本学術振興会, 基盤研究(B), 北海道大学, 20H02719 - Creation of bistable molecular junction with electrical ON/OFF switching mechanisum
Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Research (Exploratory)
30 Jul. 2020 - 31 Mar. 2023
鈴木 孝紀
「電位入力型ON/OFF機能の付与された双安定性分子ジャンクションの創成」に関する本研究課題では、分子薄膜の両面に電極が接合された分子ジャンクションについて、エレクトロニクスの高速化とダウンサイジングに不可欠な将来的技術であることを鑑み、薄膜を構成する分子の導電性が外部刺激によって変化する設計のもとで、分子ジャンクションにON/OFF機能を付与する挑戦的内容である。国立シンガポール大学C.A.Nijhuis教授との国際共同研究として実施する。電極接合については、Nijhuis教授らが持つ共融ガリウム-インジウム電極の蒸着技術を用い、Au/分子薄膜//GaOx/EGaIn型のデバイスを構築する。
初年度は、中性分子の酸化電位と新たなC-C結合が形成されることによる二価陽イオン種還元電位に1Vもの差を伴う電気化学的双安定性をもった系として、ビフェニル(BP)とジヒドロフェナントレン(DHP)骨格の変換する動的酸化還元対をモチーフとした分子の合成をおこなった。最終的に、酸化還元部位に対して、金表面に結合可能な2つのジスルフィド部位を有する一連の化合物群を合成した。酸化還元骨格上に導入する置換基によって、動作電位が変化させられることをサイクリックポルタンメトリーで確認した。具体的には、同じアミン系置換基であっても、ピロリジノ基、ジメチルアミノ基、モルホリノ基では、0.3Vの変化を観測した。その際、以前に検討したプロトタイプでの問題点であった、遅い結合切断の過程による、変換速度の問題を克服する点を解決できたことも確認した。
Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Research (Exploratory), Hokkaido University, 20K21184 - ドナーアクセプター連結型中分子による生物機能/光機能分子創出
科学研究費補助金(新学術領域(研究領域提案型))
Apr. 2018 - Mar. 2020
鈴木 孝紀
文部科学省, Principal investigator, Competitive research funding - 安定な1,4-ジイルジカチオンの発生/消失に伴うモノマー/ポリマースイッチング
科学研究費補助金(競争的萌芽研究)
Apr. 2016 - Mar. 2019
鈴木 孝紀
文部科学省, Principal investigator, Competitive research funding - Unimolecular n-bit memory and molecular wire with variable resistivities: Proposal of new molecular design and prototype construction
Grants-in-Aid for Scientific Research
2015 - 2019
Takanori Suzuki
The dynamic redox (dyrex) systems undergo reversible bond formation/cleavage upon electron transfer. This characteristic feature provides those redox systems with electrochemical bistability, by which oxidation of the donor and reduction of the cationic species occur at difference potentials. Such separation prevents the exchange of electrons between the neutral state and the cationic state, whereas the activation energy for the corresponding process in ordinary redox pairs is negligible. Thus, bistability in dynamic redox pairs can lead to their use in unimolecular memory because one molecule can be considered to be one digit if the two redox states are assigned values of 0 and 1 (e.g., the neutral donor is 0 and the cationic state is 1). We have developed several promising dyrex systems in this work, which would be used as prototypes for developing advanced molecular memory unit.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, Principal investigator, Competitive research funding, 15H03790 - マルチレドックスサイト型オリゴマー中分子による生物機能分子創出
科学研究費補助金(新学術領域(研究領域提案型))
Apr. 2016 - Mar. 2018
鈴木 孝紀
文部科学省, Principal investigator, Competitive research funding - Dynamic Imine-Bridging System Controlling Dynamic Behavior and Equilibrium
Grants-in-Aid for Scientific Research
01 Apr. 2012 - 31 Mar. 2015
KAWAI Hidetoshi, SUZUKI Takanori
A cooperation of dynamic imine-bon formations and cooperativity of allosteric bindings has been incorporated into various supramolecular motifs and studied to create "dynamic molecular system" with dynamic motion and dynamic equilibrium in this project: The following outstanding results has found: A) Preservation effect of DPs in cooperative supramolecular copolymerization based on allosteric bindings, B) Cooperative hydrogen-bonding in the hydrindacene-geared molecules, C) Opposite thermodynamic selectivity among two formyl-stations in the imine-bridged rotaxane under the hydrolytic conditions and D) Shape-memory effect and template effect by incorporating atropisomerism to imine-based macrocyclic receptors.
Japan Society for the Promotion of Science, Grant-in-Aid for Young Scientists (A), Tokyo University of Science, 24685008 - Supramolecular Rod: New Molecular Design Consept of MFMS
Grants-in-Aid for Scientific Research
2013 - 2014
SUZUKI Takanori
The acronym "MFMS" represents the molecular design concept of "maximum function on the minimum skeleton", which has been increasing in importance, especially for the design of advanced response systems. When a modular design is applied to multi-output-multi-input response systems, the multiple functional moieties have to be connected, resulting in a larger molecular size.
On the other hand, under the "MFMS" concept, the potential functions of molecules are educed by slight structural modification of a preexisting moiety to add another functionality. The "MFMS" is an atom-economical approach for the future development of highly functional materials. In this study, two kinds of multi-output molecular response systems were developed based on our electrochromic dyrex (dynamic redox) system.
Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Exploratory Research, Hokkaido University, Principal investigator, Competitive research funding, 25620050 - Ring-Fused Malonamides as a Novel Hydrogen-bonding Motif: Construction of Supramolecular Architectures with Controlled Dimensionality
Grants-in-Aid for Scientific Research
2011 - 2013
KAWAI Hidetoshi, SUZUKI Takanori
Ring-fused malonamides with two primary amide groups, such as 2,2-indanedicarboxamides, assemble into well-defined 2D-sheet structures based on the formation of 6 to 8 hydrogen bonds per molecule. The fused ring part would be planted above and below the 2D-sheet by supporting with multiple hydrogen-bondings. The stacking manner and the interlayer distances of these sheets in crystal can be manipulated by varying the size of the fused ring, to form either interdigitated or segregated structures. Furthermore, triptycene-fused malonamides for the purpose of formation to tubular structures by rolling 2D-sheet into a cylinder due to their steric hindrance of triptycenes. We revealed their hydrogen-bonding patterns to assemble a tubluar structure by powder X-ray structural analysis. This motif technique allows the ready design of crystalline materials wherein the various functionalities are situated in well-ordered arrays.
Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Exploratory Research, Tokyo University of Science, 23655024 - Integrated syntheses of novel dynamic redox systems exhibiting assembled multiple functions
Grants-in-Aid for Scientific Research(新学術領域研究(研究領域提案型))
2009 - 2013
TAKANORI SUZUKI
Electrochromism is a representative function of organic redox systems, by which electrochemical input is reversibly transduced into UV-Vis spectral output. Based on our previous studies on "dynamic redox (dyrex)" systems that undergo reversible C-C bond-formation/-cleavage upon electron transfer, we envisaged that the assembled multiple functions would be endowed under the novel molecular design, and such materials could be prepared exclusively only by using newly developed synthetic methods based on integrated reactions. This work can be divided into two parts: [1] studies on NOVEL MATERIALS exhibiting dynamic redox behavior prepared by integrated reactions; and [2] characterization and exploration of organic redox systems newly prepared by NOVEL INTEGRATED REACTIONS. Most of the research results have been published.
Ministry of Education, Culture, Sports, Science and Technology, 新学術領域研究(研究領域提案型), 北海道大学, Principal investigator, Competitive research funding, 21106012 - World-Record Molecules : The longest C-C bond and hypervalency
Grants-in-Aid for Scientific Research(基盤研究(B))
2009 - 2011
Takanori SUZUKI, Kenshu FUJIWARA, Hidetoshi KAWAI
Based on our own results for hexaphenylethane derivative studied so far, it has been proposed that the compound with a ultralong C-C bond would be generated as a stable entity when the two unpaired electron are forced to stay in a proximity in the corresponding diradical without isomerization into the closed-shell species through resonance/peri-cyclic reactions. Based on the above concept have been designed a series of tetraarylpyracenes where the longest C-C bond ever [1.791(3)Å] was determined experimentally. The expandability of such prestrained bonds was also uncovered.
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(B), 北海道大学, Principal investigator, Competitive research funding, 21350022 - 動的シクロファン:新しい分子応答系の提案
科学研究費補助金(萌芽研究)
2005 - 2007
鈴木 孝紀, 藤原 憲秀, 河合 英敏
申請者は本課題の中で「動的シクロファン」という概念を提案した。これは、外部刺激によってシクロファンの持つ歪みや骨格構造に摂動を与え、それに付随する渡環相互作用の変化やシクロファンに特徴的な物性値変化を応答出力として取り出すというユニークな試みである。これまでテレフタルアミドの様々誘導体へのp-キシリレンジアンモニウム型ゲストの添加による「超分子シクロファン」の検討を行っている。例えば、応答型レセプター機能を持つシクロファンについての検討を行い、分子内に2つのテレフタルアミド骨格を持ち、,これらが二組の1,4-ビス(フェニルエチニル)ベンゼン発色団で架橋された大環状シクロファンについては、不斉なゲストを錯形成させた時、ゲストのエナンチオマーの一方はねじれ構造への変形を引き起こすが、その鏡像体との錯形成ではホストは長方形の構造のままで変形が誘起されないという興味深い結果が得られている。これらは、円二色性(CD)出力を合わせ持つシグナリングホストとなることものである。上記の成果に基づき今年度は、6置換ベンゼンとなる2,3,5,6-テトラアリールテレフタルアミドをモチーフとして、これらが1)非会合状態ではアミドがアンチ配座となり6つの置換基は非プロペラ配置をとる、2)ジアンモニウムが会合して超分子シクロファンとなると、シン配座になったアミド基のdirecting効果により、プロペラ配座に変化する、3)点不斉の情報がプロペラ構造の動的なヘリシティに効果的に転写されることで動的応答挙動が付与される、という分子プロペラの系を確立に成功した(投稿中)
文部科学省, 萌芽研究, 北海道大学, Principal investigator, Competitive research funding, 17655012 - Research on Combinatorial Functions of Integrated Organic Redox Systems and their Applications for Unimolecular Memory
Grants-in-Aid for Scientific Research(基盤研究(B))
2003 - 2005
Takanori SUZUKI, Kenshu FUJIWARA
This project has been planned to develop new design concepts on the novel organic responding molecules based on the integration of redox active molecules. The major themes to be tackled with are as follows : (1) Redox response systems with electrochemical bistability and surface modifying properties ; (2) New synthetic strategy for the fused- polyether structures ; (3) Redox active molecules with phase transition properties triggered by external stimuli.We have succeeded in preparing redox systems to meet the requirement in the first theme, and some of them are further endowed with multi-input and multi-output fuctionalities. The disuflide unit or ethynyl groups were selected that act as surface-binding linkers for Au an Si, respectively. Preparation of SAM and examination toward the realization of unimolecular memory are now under way.The fused-polyether skeleton found in some marine natural products should be a suitable motif for studying the aggregation by weak C-H--O hydrogen bonds. In the second theme, facile and general convergent strategy was developed for a variety of polyether skeleton. Based on the newly developed protocol based on the reaction between an aldehyde and an acylanion equivalent, we could synthesize polyetheral natural product (hemibrevetoxin B) and the large segments of ciguatoxins with 4-5 ether units. X-ray analyses on some of them have revealed that several short C-H--O contacts were observed that connect tape-shaped polyethers tol the stacked or dimeric strucures. Not only natural but also non-natural polyethers are shown worth investigated.Reversible oligomerization of bis(diarylethenyl)arenes-type electron donors upon oxidation is the outstanding achievement in terms of the third theme. Deeply-colored polycation oligomers could be isolated as stable salts that regenerated the starting monomeric donors upon reduction. By attaching long alkyl chains on the aryl groups, some of these materials act as organic gelators, thus giving a new desing concept for the dynamic mesophase, whose properties can be modulated by electrochemical input.
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(B), 北海道大学, Principal investigator, Competitive research funding, 15350019 - 不斉表面の電気化学的応答とその機能
科学研究費補助金(萌芽研究)
2002 - 2004
鈴木 孝紀
本研究課題の目的は、1)不斉要素を有する有機酸化還元系の構築とその応答機能を開発し、2)それらを表面へと固定できる方法論を応用して表面物性としての機能を引き出すことにある。本年度はそれぞれ、1)テトラヒドロフェナントラアゼピン骨格を有する系の開発、2)表面修飾に利用できるアンカー置換基を有する酸化還元系の開発について検討を行った。a)アゼピン骨格を有するキラルな酸化還元系:不斉要素を有する有機酸化還元系は、電気化学的入力に対して電子スペクトル及び円二色性(CD)スペクトルの双方の出力を与える多重出力型分子応答系となる。大きなCD出力を得るためには、エキシトンカップリングの利用できる軸不斉またはらせん状化合物が望ましい。表題骨格のヘリシティは容易に反転するが、N上にキラルなベンジルアミノ基を導入することで一方のジアステレオマーを優先させることに成功した。これにより、煩雑な光学分割を行わずに感度良くエレクトロキロオプティカル出力が得られる系の構築が可能となった。b)末端アセチレンおよびジスルフィド官能基をする酸化還元系:表面での自己組織化膜の形成を行うためには、表面修飾に利用できるアンカー置換基が導入された機能性酸化還元系を合成する必要がある。これまで動的酸化還元活性が確認されたジスピロジヒドロフェナントレン骨格を有する3種の酸化還元対の、a)ベイ領域へのエチニル基に導入、b)スピロ環上へのプロパルギル基の導入、c)ベイ領域へのジスルフィド官能基の導入された化合物の合成に成功した。前2者は水素終端シリコン表面への固定に、後者は金表面への固定に利用できる官能基を有するものであり、現在膜の調製の検討を行っている。
文部科学省, 萌芽研究, 北海道大学, Principal investigator, Competitive research funding, 14654139 - Electrochiroptics : Novel Molecular Response System
Grants-in-Aid for Scientific Research(基盤研究(B))
2001 - 2002
Takanori SUZUKI, Takashi TSUJI
This research project is intended to construct the novel molecular response systems that transduce the electrochemical input into two kinds of spectral outputs, they are UV-Vis and CD spectra. These materials are named as "electrochiroptical response systems", and considered as promising candidates for use as chiral redox memories. Compared with the extensively studied electrochromic materials giving the UV-Vis spectral change as a sole output, there have been only a few successful examples reported so far. Based on our previous results on the multi-stage redox systems endowed with high electrochemical bistability, we have designed several chiral electron donors that can be reversibly transformed into the stable dicationic species. They exhibited drastic changes in UV-Vis as well as CD spectra during the interconversion. The high amplitude in CD signals is one of the central points to be considered in the molecular design, and we have realized it by exciton coupling of two identical chromophores located at the proper positions in these molecules. We are now planning to fix these molecules on the metal surface by making SAM, so that these molecules can be used as molecular devices.
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(B), 北海道大学, Principal investigator, Competitive research funding, 13440184 - 特異なスピン共役系の関係と展開
科学研究費助成事業
1998 - 2000
小林 啓二, 石黒 勝也, 井上 克己, 岡田 恵次, 阿波賀 邦夫, 鈴木 孝紀, 富岡 秀雄
主な研究実績は以下の三つに大別することができる。
新しい安定スピン共役電子系の開発:立体保護により、半減期が室温で10分近くに及ぶ非常に安定な三重項カルベンを開発した。安定なラジカル種により構成される単一成分分子性金属が見い出された。また、キラルな構造を有する不斉ラジカル種の開発に成功し、不斉分子磁石の構築への指針が提示された。
集合体としてのスピン共役電子系の設計と性質:窒素二座型配位子を中心に、スピン共役電子系を配位子とする自己集積型金属錯体による高スピン種の開発が行われ、配位子におけるスピン伝達の様式が解析できた。また、室温をまたいで磁気的双安定性を示すラジカル集合体結晶が発見され、室温での磁気的性質のスイッチング現象を実現させた。
外部応答を示す動的なスピン共役電子系の研究:プロトン濃度に依存して双極イオン構造とビラジカル構造との平衡が成立する分子開発した。酸性度を磁性をプローブとして計測する方法論の基礎が検討された。電気化学的反応系でも、このようなイオン反応が絡む電子構造スイッチング反応が見い出された。電荷移動を固体摩砕により誘起できることが分かった。固相中に開殻分子種を発生させる手法へと展開が計られ、さらに固相反応の触媒的役割が明らかになった。
日本学術振興会, 特定領域研究(A), 東京大学, 10146101 - 多点相互作用反応・場として機能する新規環状構造の開発
科学研究費助成事業
1999 - 1999
辻 孝, 大北 雅一, 鈴木 孝紀
分子認識や自己認識化には、当該分子が分子形状を維持する剛直性と状況に適応し得る柔軟性を併せ備えていることが求められる。本研究では、5員環部が還元されたインダセンがそのような特性を備え、適切に異なる官能基によって構造修飾することにより、三次元的な相互作用を制御できる点に着目した。
1.インダセン骨格を利用した新規ホスト化合物の合成 5員環はenvelop型配座をとっており、(Z)-置換体では嵩高さの小さな基はaxial位をとってπ-πstacking構造の錯体を形成するのに適した約7.0Aの距離をおいてほぼ平行に配列される。(Z)-置換誘導体の結晶構造解析は、計算による予測を裏付けた。また、2分子が歯車のように互いに噛み合った興味深い結晶構造を明らかにした。若干の置換アリールエチニル体を合成し、そのホスト分子としての機能に検討を加えた。その結果、CT吸収強度に(Z)-体と(E)-体では約9倍の差が認められ、(Z)-体とのより強い錯体形成が認められた。
対応する(E)-置換体では、より嵩高い置換基がequatorial配座をとって逆方向に配列される。4-ピリジル/メトキシカルボニル置換体のX線構造解析は、このことを実証した。共有結合あるいは金属への配列を利用して大環状構造を構築すれば、官能基を大環状構造の環内方向に配列させることができる。大環状の構築とその基質の取り組みの選択性と触媒機能を継続課題として解明する計画である。
2.官能基化したパラフェニレン/エチニレン型マクロサイクルの合成 先に合成を報告したジクロロDewarベンゼンが、官能基化したメタおよびパラフェニレン構造をその折れ曲がり構造を利用して大環状構造に組み込むための合成素子として有用であることを見い出した。1, 2-ジエチニルベンセンとの交互(2:2)環化カップリング、および1,3-ジエチニルベンゼン等価体との(2:4)環化カップリング、保護基の交換、光芳香環化によって官能基化したパラフェニレン/エチニレン型マクロサイクルが得られた。それらのキラル性、空孔への基質特異的取り組みと官能基による活性化は今後の検討課題である。
日本学術振興会, 特定領域研究(A), 北海道大学, 11119201 - Development of Novel Cyclic Structures Possessing Inclusion, Self-Assembly, and Self-Organization Properties
Grants-in-Aid for Scientific Research
1998 - 1999
TSUJI Takashi, OHKITA Masakazu, IMAI Toshiro, SUZUKI Takanori
[l] Syntheses and Properties of Novel Receptors Possessing Hydrindacene Skeleton Hydrindacene skeleton is consisted of rigid central aromatic ring and flexible peripheral 5-membered rings, and its intermolecular interactions are expected to be adequately regulated by functionalizing those rings with suitable substituents. In this study, the development of title receptors was investigated on the basis of those expectations.
The preparation of several substituted derivatives followed by their X-ray structural analyses revealed that the 5-membered rings prefer an envelope conformation and the less bulky substituents (Rs) are disposed nearly parallel to each other at a distance of ca. 7.0 Å, twice the interlayer distance in graphite. Those structural chacteristics were exploited to the design of novel multiply functionalized receptor molecules which preferentially associate with specific stubstrates. Thus, the (Z) Rs = arylethynyl/R_L = alkoxycarbonyl derivatives seem to incorporate aromatic substrates between the arylethynyl groups, facilitated by the π-π stacking interactions. The Rs = alkoxycarbonyl/R_L = aryl derivatives were also prepared and utilized to construct macrocyclic receptors in which the former substituents are oriented to the inside of the cycles.
[2] Preparation of Functionalized Phenylene-ethynylene Macrocycles 1,4-Bridged dichloro-Dewar benzenes are accessible in 4 steps from DMAD and dichloroethylene. Functionalized m- and p-phenylene groups are conveniently incorporated into macrocycles by taking advantage of their equivalency to bent benzene derivatives. Thus, their alternating (2 : 2) coupling- cyclization with diethynylbenzenes followed by hydrolysis and aromatization provided functionalized phenylene-ethynylene macrocycles which were otherwise diffiucult to access.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), HOKKAIDO UNIVERSITY, 10440182 - インダン骨格を利用した超分子形成能を有する基質設計を機能開発
科学研究費助成事業
1998 - 1998
辻 孝, 大北 雅一, 今井 敏郎, 鈴木 孝紀
ベンゼン環の両側に飽和5員環が縮環したヘキサヒドロインダセン骨格では、両末端の5員環上の置換基とベンゼン環上の置換基が直交した配向をとることを特徴とする。その結果、それらの置換基を操作することによりx,y,z3軸方向での分子間相互作用を制御できる。本研究では、5員環およびベンゼン環上に水素結合能や金属配位能を有する置換基を導入したインダセン誘導体と、その骨格を複数個環状に結合したマクロサイクルを設計し、その合成と超分子形成能に検討をくわえた。
1. 官能基化したヘキサヒドロインダセン誘導体の合成に関する報告は少ない。そこで、ベンゼン環上に官能基変換が可能なメトキシ基、また、5員環にカルボニル、カルボキシル基等を導入した誘導体の合成法の開発を行い、それらの誘導体合成への道を開いた。
2. ベンゼン環に縮環した5員環は、カルボニル基や二重結合の導入によりベンゼン環と共平面に固定されるが、飽和の場合には比較的大きな配座自由度をもつ。その特性を利用した超分子形成能を有する基質の設計と官能基による構造修飾の可能性に検討を加えた。
3. ヒドリンダセンの2つの5員環にsyn/anti面選択的に置換基を導入することは困難であるが、環状ケトアミドでの容易なエピマー化能を利用し、基質のsyn/anti立体化学に拘わらず、syn体を経由してアミド基間の水素結合によって大環状構造へと自己組織化三量化する基質の設計と開発を行った。
日本学術振興会, 萌芽的研究, 北海道大学, 10874104 - 多年相互作用反応場開発を指向した新規環状構造の構築と機能
科学研究費助成事業
1998 - 1998
辻 孝, 大北 雅一, 今井 敏郎, 鈴木 孝紀
適切な官能基の導入によって、x,y,z座標軸方向での相互作用の制御が可能なヘキサヒドロインダセン(ヒドリンダセン)骨格を主要構成単位とする大環状構造の構築と、その多点相互作用による基質特異的ゲスト分子の取り込み、さらに、立体選択的反応場としての機能開発を目指した研究をおこなった。
1.電子供与性基を置換したヒドリンダセン骨格と、環内部への水素結合受容体の取り込みを目指した水素結合供与(アミド)基から成るマクロサイクルの設計と合成をおこなった。π-π stackingの効果と水素結合によってジニトロベンゼン、ジシアノベンゼン等との基質特異的ホスト-ゲスト錯体形成を狙ったものである。錯体形成は吸収スペクトルの変化によって検知できると考えており、上記の化合物に対する特異的センサーとして、また、反応場としての機能をさらに明かにしてゆく予定である。
2.ヒドリンダセン骨格とジエチニルベンゼンを交互に繋ぎ、大きな空孔をもつ環状構造の構築を進めた。ベンゼン環上の置換基は配座間の相互変換によってその位置関係が大きく変化し、置換基との相互作用による基質の取り込みと排出に際して機能すると考えられる。これらの結果に基いてさらに、ヒドリンダセンのベンゼン環上への水素結合能や金属配位能を有する置換基の導入とそれらの基を利用したチャンネル構造の形成、官能基化された開閉機能を備えた側鎖の導入による篭形構造の構築と多点相互作用によって基質を構造特異的に活性化する反応場の形成に検討を加える予定である。
日本学術振興会, 特定領域研究(A), 北海道大学, 10132201 - インダセン骨格によって構成された包接、自己集合能を有する基質の設計・開発研究
科学研究費助成事業
1997 - 1997
辻 孝, 大北 雅一, 今井 敏郎, 鈴木 孝紀
ベンゼン環の両側に飽和5員環が縮環したヘキサヒドロインダセン骨格は、両末端の5員環上の置換基が環骨格にたいして直交した方向の、一方、ベンゼン環上の置換基は5員環上の置換基に対して垂直方向の配向をとることを特徴とする。5員環およびベンゼン環に水素結合能や金属配位能を有する置換基を導入したインダセン誘導体と、その骨格を複数個環状に結合したマクロサイクルの設計と合成に検討を加えた。
1.官能基化したヘキサヒドロインダセン誘導体の合成に関する報告は少ない。そこで、ベンゼン環上に官能基変換が可能なメトキシ基、また、5員環にカルボニル、カルボキシル基等を導入した誘導体の合成法の開発を行い、それらの誘導体合成への道を開いた。
2.ヘキサヒドロインダセン骨格を5員環末端位で二量化し、二重結合の導入、シクロプロパン化によってシクロプロパン環を介したスピロ結合によってインダセン骨格を結び付けた構造を合成した。2つのインダセン骨格が互いに約120℃の角度をなして折れ曲がった構造をしており、今後のマクロサイクル合成の基本となるものである。
3.ベンゼン環に縮環した飽和5員環の比較的大きな自由度や、環状ケトエステルでの容易なエピマ-化能を利用した分子識別能や自己組織化能をもつヘキサヒドロインダセン誘導体を本研究過程で新たに着想し、その合成研究を進めた。X線構造解析の結果、飽和5員環の両末端位置の置換基がインダセン骨格に対してほぼ垂直の配座を優先することが明らかとなったが、この特徴を今後の分子間会合研究に取り入れ、生かすことを計画している。
日本学術振興会, 萌芽的研究, 北海道大学, 09874120 - 〔1.1〕パラシクロファンの動力学的安定化とその化学特性研究
科学研究費助成事業
1996 - 1997
辻 孝, 大北 雅一, 今井 敏郎, 鈴木 孝紀
1.速度論的に安定化された[1.1]パラシクロファンの単離とX線構造解析。 我々が1993年にその合成を初めて報告した[1.1]パラシクロファンとその若干の置換体は、いずれも溶液中-20°C以下でのみ安定に存在し得る化合物であった。本研究において、そのベンゼン環上に-CH_2Si(CH_3)_3,-CON(CH_3)_2基を導入することによって著しく安定化されることを見い出し、単結晶として単離することに成功した。そのX線構造解析は、既存化合物中では最高度に変形したベンゼン環の存在を明らかにした。また、著しい変形にもかかわらず、理論計算から予測されたようにベンゼン環に検知し得るほどの結合交替はなく、良好な芳香族性の維持が示唆された。
2.速度論的に安定化された新規[1.1]パラシクロファンおよび[1.1]ナフタレノファンの合成研究。[4]パラシクロファン系における研究成果に基き、新たにメチレン側鎖上にアルキリデンを導入した[1.1]パラシクロファン誘導体、および、ベンゾ縮環を導入して共役系の拡張と速度論的安定化を兼ね備えた[1.1]ナフタレノファン誘導体の合成を進めた。これらの化合物では、[1.1]パラシクロファンの2つのベンゼン環上に電子的性質を異にする置換基の導入が可能であり、[1.1]パラシクロファンの特徴である強制された渡環相互作用による特性の発現が期待される。
3.[1.1]パラシクロファンの酸化還元挙動の解析。 理論計算は、[1.1]パラシクロファンのジカチオン種では2つのベンゼン環の面間隔の著しい減少と2つのベンゼン環に渡る電子の非局在化による新規な芳香族性の発現を示唆した。しかし、Et,CON(CH_3)_2基を置換した誘導体についてのCV測定では、安定なカチオンラジカル、ジカチオン種の生成は見い出せなかった。速度論的安定化が不十分なためと考えられ、上記(2)の化合物の合成を待ってさらに検討を進める。
日本学術振興会, 基盤研究(B), 北海道大学, 08454192 - Construction of Redox-type Photochromic Systems Based on Photoinduced Electron Transfer Reactions in Crystalline State
Grants-in-Aid for Scientific Research(基盤研究(C))
1996 - 1997
Takanori SUZUKI
The research project is intended to construct the novel redox-type photochromic systems based on the photoinduced electron transfer reactions of electron-donor-acceptor complexes in the crystalline state. In order to realize such an idea it is essential to develop a new type of redox molecules exhibiting bistability. Thus, the redox pairs were designed so as to undergo reversible C-C bond formation and cleavage upon electron transfer. The research started from examining the interconversion hexaphenylethane derivatives 1 and dicationic bis (triarylmethane) dyes 2. It has been found that they constitute the dynamic and reversible redox pair showing vivid change in color and drastic structural change upon electron transfer. They surely are the promising candidate for the present purpose. Unfortunately, however, attempts to obtain the CT crystal of 1 with a variety of electron donors have been unsuccessful, preventing me from realizing my initial proposal. Next, the biphenyl-type electron acceptors having dicyanovinyl moieties were investigated. 2,2'-Disubstituted derivative was found to undergo C-C bond formation upon two-electron reduction. By combining the further isomerization of the reduction product, the latter system constitute a prototype of the novel electrochromic system with "write protect" option.
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(C), 北海道大学, Principal investigator, Competitive research funding, 08640664 - 新規安定ラジカルの両性多段階酸化還元挙動と単一成分有機電導体への展開
科学研究費補助金(重点領域研究)
1995 - 1995
鈴木 孝紀
現在までに良好な電導性を示す数多くの分子性結晶が知らるようになったが、有機超伝導体を含めてそのほとんど全てが二成分以上から形成されている。これは、有機固体での電導性の担い手となる伝導電子を供給するという不可欠な要因によるものであるが、このこと自体が系の複雑さを増大させ、固体物性を司る結晶構造の制御をより困難にしている事も事実である。このような観点からすると単一成分有機電導体の研究はこの分野の新しい展開方向を指し示すものの一つと考えられる。そこで本課題では電気化学的両性度の高い新規な安定ラジカルを合成、単離しその単一成分有機電導体としての有効性を検討する事を目的として研究を行うことにした。実際の研究では四環性窒素複素環化合物であるキノキサロ[2,3-b]キノキサリン骨格(1)をモチーフとして選んだ。これは、ピラジンに代表される窒素複素環が代表的なW eitz型の酸化還元系を為すため電気化学的両性を付与しやすいこと、また極く限られた系ではあるものの中性ラジカルが安定に単離されている例があることを考慮した分子設計による。母体の1aとメチルトリフレートとの反応で5位が4級化されたカチオン種2aとした。このものの電子受容性は非常に高く、塩化メチレン中で還元電位の測定では+0.66及び-0.20Vに可逆な波形を示した。このことは2aの一電子還元で生成するラジカル種3aが0.86Vという小さなEsum値を持つ電気化学的両性の強い分子であることを予想させる。しかし、ヨウ化物イオンを用いた2aの還元では電子スペクトルで748nmの吸収を有する新しい化学種が観測されたものの半減期が10秒程と不安定な為その単離には至らなかった。そこで1aの1,4,7,10位の4箇所に様々な置換基を導入した化合物から出発しラジカル種3を安定に単離した。これらは10^<-7>から10^<-9>Scm^<-1>程度の電導性を示すことが明らかとなった。これらの値は決して高いものではないが、本研究の分子設計の妥当性を示すものである。
文部科学省, 重点領域研究, 北海道大学, Principal investigator, Competitive research funding, 07232205 - Studies of Highly Reactive Biradical and Cation Radicals
Grants-in-Aid for Scientific Research
1994 - 1995
MIYASHI Tsutomu, MCBRIDE J.Michael, HILINSKI Edwin.F., GOODMAN Joshua.L., WAGNER Peter J., AKIYAMA Kimio, SUZUKI Takanori, TAKAHASHI Yasutake, IKEDA Hiroshi, MARIANO Patrick S., DINNOCENZO Joseph P., BERSON Jerome A.
We have studied the relationship between biradical (BR) and cation radical(CR)intermediates in the photoinduced electron-tranfer(PET)skeletal rearrangement of organic compounds. In general, a nondistonic CR of a donor substrate generated by PET from the excited state of sensitizer (A)can undergo the bond formation or bond cleavage to give a more stable distonic CR intermediates (I^<・+>). Although free distonic CRs have been often observed spectroscopically and/or captured by a trapping reagent such as molecular oxygen or alcohol, reactions of a distonic CR in an ion pair [I^<・+>/A^<・->] have not been well understood yet. There are two possibilities for the decay of a distonic CR intermediate. One is back electron transfer (BET) from A^<・-> to give a singlet or triplet BR intermediate, which give final product (s) by the bond cleavage or formation. The other one is an alternative possible sequence, i.e., bond cleavage or formation in a CR stage followed by BET.In order to know which process is operative, we use two complementary laser techniques, time-resolved absorption spectroscopy for the direct observation of CR and BR intermediates and time-resolved photoacoustic calorimetry for the determination of energy of [I^<・+>/A^<・->]. As result, we found three PET reactions that proceed through both CR and BR intermediates. The first is the PET degenerate Cope rearrangement of 2,5-diaryl-1,5-hexadiene, which proceeds in a CR cyclization-BR cleavage mechanism through 1,4-diarylcyclohexa-1,4-diyl CR and 1,4-diarylcyclohexa-1,4-diyl BR.The second example is the degenerate methylenecyclopropane rearrangement of 2,2-diarylmethylenecyclopropane induced by PET,which involves a trimethlenemethane CR (TMM^<・+>) and corresponding BR (TMM). The last case is the generation of singlet and triplet tetramethyleneethane BRs by cyclization of 5,5-dimethy1-2,3-bis (1-phenylvinyl) cyclopentadiene CR.
Those three PET reactions provided an intriguing conclusion that BET in an ion pair is an important key process which connects CR chemistry with BR chemistry. This conclusion is quite noteworthy since, up to the present, BET was usually considered as an energy wasting process.
Japan Society for the Promotion of Science, Grant-in-Aid for international Scientific Research, Tohoku University, 06044014 - Studies on Molecular Devices showing Redox Response
Grants-in-Aid for Scientific Research(一般研究(C))
1994 - 1995
Takanori SUZUKI
The research project is intended to construct the organic redox systems which exhibit the electrochemical response such as electrochromism. In order to realize such molecular systems a new way of molecular designing was adopted where (1) the charged species would be stabilized by formation of strong chromophores with large pi-conjugation but not by aromatization and (2) drastic structural changes should be occurred during the electron transfer. These conditions are quite different from what had been used to design the multi-stage redox systems for a long time. The "dynamic redox behavior"is the central concept in this work, thus the redox pairs were designed so as to undergo reversible C-C bond formation andcleavage upon electron transfer. Dibenzo-TTF derivatives inserted with a cycloalkane ring as well as their isomersof the tricyclic skeleton were studiedin detail as prototypes. Some molecules studies here were proven to be thereversible dynamic redox systems . In orderr to construct the electrochromic systems other molecules containing triarylmethane dye skeletons were designed. The reversible interconversion between hexaarylethane derivatives and bis (triarylmethane) dications was demonstrated .
Ministry of Education, Culture, Sports, Science and Technology, 一般研究(C), 東北大学->北海道大学, Principal investigator, Competitive research funding, 06640675 - 新規安定ラジカルの両性多段階酸化還元挙動と単一成分有機電導体への展開
科学研究費補助金(重点領域研究)
1994 - 1994
鈴木 孝紀
本研究では電気化学的両性度の高い新規な安定ラジカルを合成単離し、その単一成分有機電導体としての有効性を検討する事を目的としている。実際の分子設計に於いては、電子供与性(D)及び受容性(A)双方の部分構造を一分子内に含むA-π-D^・型の中性ラジカルを設計した。平成6年度にはD^・骨格となるピリジル基のN上に、長さの異なるアルキル鎖を有するR-1の研究を行なった。得られたラジカルは高い電気化学的両性度を有し、またRの長さによってその酸化還元挙動は変化しない。しかし、その電導性はRの長さにより系統的に変化することが見いだされた。メチルおよびペンチル体のX線構造解析によれば、これらのラジカルはいずれもA^<-・>-π-D^+型の分極構造を有していることが示され、また結晶中に於ける分子の重なりも非常に良く似ている。しかし、Rが長くなるにつれて結晶構造の二次元性が顕著に低下し、これが電導性の変化につながっていることが明らかとなった。
文部科学省, 重点領域研究, 東北大学, Principal investigator, Competitive research funding, 06243204 - Photoinduced Electron-Transfer Reactions of Polyenes and Small Ring Compounds
Grants-in-Aid for Scientific Research
1992 - 1993
MIYASHI Tsutomu, SUZUKI Takanori, IKEDA Hiroshi, TAKAHASHI Yasutake
The photoinduced CR Cope rearrangements of 2,5-diaryl-1,5-hexadiene derivatives were investigated in terms of the energy surface. Combining chemical evidences with results on Ea for cyclization of diene cation radicals and the energy level of the cyclohexa-1,4-cation radical ion-pair obtained by pulse-radiolysis and photoacoustic calorimetric analysis, a cation radical cyclization-diradical cleavage mechanism was established for the photoinduced CR Cope rearrangement. The PET reaction of 1,4-diaryl-2,3-dimethylbicyclo[2.2.0]hexanes which is related to the CR Cope rearrangement provided the sensitizer and solvent polarity-dependent dual reactivity of 1,4-diaryl-2,3-dimethylbicyclo[2.2.0]hexane cation radicals. The intramolecular [2+2]cycloadditions of 2,6-diaryl-1,6-heptadiene cation radicals to form bicyclo[3.2.0]hexanes occurred efficiently, but the efficiency markedly decreased with an increase in the number of the methylene group between two stirene units for the PET reactions of 2,7-diaryl-1,7-octadienes and 2,8-diaryl-1,8-nonadienes.
The PET reactions of the 3,4-bis(styryl)-substituted furan and pyrrole derivatives were investigated by laser flash photolysis, which proved the generation of fused dimethylenefuran and dimethylenepyrrole derivatives and provided rate constants of chemical capture with electron-deficient diylophiles. By combination of these results with stereochemistry of chemical capture and MO calcultations, the ground state singlet states of fused dimethylenefuran and dimethylenepyrrole derivatives was determined. Experimental verification of the inversion of the spin multiplicity of dimethylenepyrroles is currently investigated for pyrrole derivatives with an electron-withdrawing group.
Photoexciation reactions of solid state molecular complexes of BTDA and three divinyl benzenes provided intersting [2+2]cycloaddition reactions via electron-transfer. The probable absolute asymmetric synthesis via the single crystal-to-single crystal transformation is currently investigated for the solid state PET reaction of the molecular complex of BTDA and omicron-divinylbenzene.
Japan Society for the Promotion of Science, Grant-in-Aid for General Scientific Research (A), TOHOKU UNIVERSITY, 03403005 - 機能性多段階酸化還元系の開発とその応答機能
Competitive research funding - Molecular Response System Based on Dynamic Redox Properties
Competitive research funding
Industrial Property Rights
- 新規なビキサンテン化合物およびビスキサンテニリウム化合物とその製造方法、およびその用途
Patent right, 鈴木孝紀, 藤原憲秀, 河合英敏, 田中祥子, 樋口博紀
特願2004-265909, 2004 - 新規なビアクリダン化合物およびビスアクリジニウム化合物とその製造法、およびその用途
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Patent right, 宮仕 勉, 山下 敬郎, 鈴木 孝紀, 藤井 宏, 三菱石油株式会社
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Patent right, 宮仕 勉, 向井 利夫, 山下 敬郎, 鈴木 孝紀, 藤井 宏, 三菱石油株式会社
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特開平1-160925, 23 Jun. 1989
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Patent right, 向井 利夫, 山下 敬郎, 鈴木 孝紀, 富士ゼロックス株式会社, 向井 利夫
特願昭61-298371, 15 Dec. 1986
特開昭63-150273, 22 Jun. 1988
201103059002566719 - 新規化合物、その化合物と電子供与体との電荷移動錯体、及びその化合物の陰イオンあるいは陰イオンラジカルの塩
Patent right, 向井 利夫, 山下 敬郎, 鈴木 孝紀, 向井 利夫, 富士ゼロックス株式会社
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Others
- 1988-1989 日本学術振興会特別研究員 日本学術振興会特別研究員
1989-1994 東北大学助手(理学部化学科) 助手
1995 北海道大学助教授(理学部化学第二学科) 助教授
1995-2002 北海道大学助教授(大学院理学研究科化学専攻) 助教授
2002-2006 北海道大学教授(大学院理学研究科化学専攻) 教授
2006- 北海道大学教授(大学院理学研究院化学部門) 教授 - 1988-1989 Postdoctoral Fellowships of Japan Society for the Promotion of Science,JSPS Research fellow: 1988-1989; Assistant Professor: Tohoku University, 1989-1994; Associate Professor: Hokkaido University, 1995-2001; Full Professor: Hokkaido University, 2002-present
1989-1994 Research Associate
1995 Associate Professor
1995-2002 Associate Professor
2002-2006 Professor
2006- Professor
syllabus
- 分子化学(有機構造化学特論), 2024年, 修士課程, 総合化学院
- 構造有機化学, 2024年, 修士課程, 総合化学院
- 総合化学特論Ⅱ(Modern Trends in Organic Chemistry and Biological Chemistry), 2024年, 修士課程, 総合化学院
- 大学院共通授業科目(一般科目):自然科学・応用科学, 2024年, 修士課程, 大学院共通科目
- 総合化学特論II (Modern Trends in Organic Chemistry and Biological Chemistry), 2024年, 修士課程, 工学院
- 先端総合化学特論Ⅰ, 2024年, 博士後期課程, 総合化学院
- 総合化学特論II (Modern Trends in Organic Chemistry and Biological Chemistry), 2024年, 博士後期課程, 工学院
- 教科教育法(理科Ⅲ), 2024年, 学士課程, 教育学部
- 教科教育法(理科Ⅳ), 2024年, 学士課程, 教育学部
- 一般教育演習(フレッシュマンセミナー), 2024年, 学士課程, 全学教育
- 化学実験Ⅲ, 2024年, 学士課程, 理学部
- 基礎有機化学, 2024年, 学士課程, 理学部
- 教科教育法(理科Ⅱ), 2024年, 学士課程, 教育学部
- 教科教育法(理科Ⅰ), 2024年, 学士課程, 教育学部
- 機能生化学, 2024年, 学士課程, 理学部
- 生物化学Ⅱ, 2024年, 学士課程, 理学部