Updated on 2026/03/11

写真a

 
YUASA HIDEYA
 
Organization
School of Life Science and Technology Professor
Title
Professor
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News & Topics

Degree

  • Doctor of Science

Research Interests

  • Photochemistryt

  • 生物有機化学

  • Biological Organic Chemistry

Research Areas

  • Life Science / Bioorganic chemistry

Education

  • 東京工業大学大学院   総合理工学研究科   生命化学

    - 1991.3

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    Country: Japan

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  • Tokyo Institute of Technology   School of Science   Dept. of Chemistry

    - 1986

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    Country: Japan

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Research History

  • Institute of Science Tokyo   School of Life Science and Technology   Professor

    2024.10

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  • Tokyo Institute of Technology   School of Life Science and Technology   Professor

    2010.10 - 2024.10

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  • Ministry of Education, Culture, Sports, Science and Technology Research Promotoin Bureau Program Officer

    2004 - 2006

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  • 東京工業大学 助教授

    2000

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  • 東京工業大学 助手

    1994

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  • 理化学研究所 フロンティアシステム研究員

    1993

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  • アルバータ大学化学科 博士研究員

    1991

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Professional Memberships

Committee Memberships

  • 日本化学会   関東支部代議員  

    2006   

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    Committee type:Academic society

    日本化学会

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  • 日本糖質学会   評議員  

    2004   

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    Committee type:Academic society

    日本糖質学会

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Papers

  • Magnesium‐Promoted Benzidine‐Type Rearrangement for Regioselective Construction of Polyfunctionalized Biaryls

    Shumpei Saito, Manato Ishida, Yuki Busujima, Miki Ebihara, Kodai Kohama, Naomi Tanaka, Eitaro Toya, Minami Nakamura, Takashi Kanamori, Tadaomi Furuta, Shota Matsumoto, Satoru Karasawa, Hideya Yuasa, Takeshi Hata

    Chemistry – A European Journal   2026.2

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    Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    ABSTRACT

    A magnesium‐promoted benzidine‐type rearrangement of 1,3‐dihalonitroarenes with aryl Grignard reagents has been developed, enabling the highly regioselective and efficient synthesis of 1‐amino‐1’‐hydroxy‐4,4’‐biaryls under simple, transition‐metal‐free conditions. A rational substrate design—featuring an ortho substituent (R) and two meta ‐substituted electron‐withdrawing groups (X, Y)—steers the reaction trajectory, converting a previously minor [5,5]‐sigmatropic migration into the dominant pathway. The transformation exhibits broad functional‐group tolerance, excellent scalability, and provides direct and operationally straightforward access to polyfunctionalized biaryls. Furthermore, trifluoroacetamide‐substituted nitroarenes undergo [5,5]‐rearrangement followed by intramolecular cyclization to furnish CF 3 ‐substituted benzimidazoles with high regioselectivity. Overall, this study expands the conceptual scope of benzidine‐type rearrangements and establishes a mechanistically tunable, sustainable strategy for constructing valuable biaryl and heteroaromatic scaffolds.

    DOI: 10.1002/chem.202503607

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    Other Link: https://chemistry-europe.onlinelibrary.wiley.com/doi/full-xml/10.1002/chem.202503607

  • Facile Synthesis of 5‐Halo‐1,2,3‐triazole‐fused Benzotricyclic Frameworks from 1‐(ω‐Azidoalkyl)‐2‐(2,2‐dihalovinyl)arenes and their Application in Fluorescent Triazole Derivatives

    Takeshi Hata, Seiya Kikukawa, Miki Ebihara, Kazuki Kobayashi, Nozomi Kasakura, Takashi Kanamori, Tadaomi Furuta, Ai Kohata, Nobuaki Funahashi, Shota Matsumoto, Satoru Karasawa, Kazushi Kinbara, Naohiko Koshikawa, Hideya Yuasa

    European Journal of Organic Chemistry   e202500355   2025.6

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    By heating 1‐(ω‐azidoalkyl)‐2‐(2,2‐dihalovinyl)arenes in DMF, intramolecular Huisgen cycloaddition between the azido group and the 1,1‐dihalovinyl moiety proceeded smoothly to afford 5‐halo‐1,2,3‐triazole‐fused tricyclic benzocondensed compounds. Leveraging the remaining halogen groups, carbon‐chain extension via Mizoroki–Heck or Suzuki–Miyaura coupling reactions, followed by an intramolecular Friedel–Crafts reaction, furnished polycyclic systems incorporating fused triazole rings. Furthermore, transformation of the halogen groups into 2‐nitrobenzene derivatives via Suzuki–Miyaura cross‐coupling, followed by a Cadogan reaction using triphenylphosphine, provided a series of fluorescent pentacyclic compounds.

    DOI: 10.1002/ejoc.202500355

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  • Diffusion of 1O2 along the PNA backbone diminishes the efficiency of photooxidation of PNA/DNA duplexes by biphenyl photosensitizer Reviewed

    Yaoyao Du, Takashi Kanamori, Yuma Yaginuma, Nanai Yoshida, Shota Kaneko, Hideya Yuasa

    Bioorganic & Medicinal Chemistry Letters   114   129988 - 129988   2024.12

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    DOI: 10.1016/j.bmcl.2024.129988

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  • Photoswitching CD1d-restriction of TCR by α-GalCer analogs with azobenzene in the middle of acyl chain Reviewed

    Takashi Kanamori, Daisuke Nakabun, Satoshi Kojo, Hiroshi Watarai, Hideya Yuasa

    Journal of Photochemistry and Photobiology A: Chemistry   451   115501 - 115501   2024.6

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    Authorship:Corresponding author   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.jphotochem.2024.115501

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  • Mangostin enhances efficacy of aminolevulinic acid-photodynamic therapy against cancer through inhibition of ABCG2 activity Reviewed

    Hung Wei Lai, Yukitaka Tani, Udomlak Sukatta, Prapassorn Rugthaworn, Asada Thepyos, Shinkuro Yamamoto, Hideo Fukuhara, Keiji Inoue, Hideya Yuasa, Hiroyuki Nakamura, Shun-ichiro Ogura

    Photodiagnosis and Photodynamic Therapy   44   103798 - 103798   2023.12

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    Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.pdpdt.2023.103798

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  • Photoreaction of nitrobenzene derivatives with alkyl thiols giving sulfonamides and derivatives Reviewed

    Hideya Yuasa, Tomohiro Yube, Takashi Kanamori

    Phosphorus, Sulfur, and Silicon and the Related Elements   198 ( 9 )   765 - 769   2023.4

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)   Publisher:Informa UK Limited  

    DOI: 10.1080/10426507.2023.2195651

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  • Mapping the diffusion pattern of 1O2 along DNA duplex by guanine photooxidation with an appended biphenyl photosensitizer. Reviewed International journal

    Takashi Kanamori, Shota Kaneko, Koji Hamamoto, Hideya Yuasa

    Scientific reports   13 ( 1 )   288 - 288   2023.1

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    To realize nucleic acid-targeting photodynamic therapy, a photosensitizer should be attached at the optimal position on a complementary oligonucleotide, where a guanine photooxidation is maximized. Here we show the photooxidation of 22 DNA duplexes with varied lengths between a 1O2-generating biphenyl photosensitizer attached at a midchain thymine in a strand and the single guanine reactant in the other strand. The best photooxidation efficiencies are achieved at 9, 10, and 21 base intervals, which coincides with the pitch of 10.5 base pairs per turn in a DNA duplex. The low efficiencies for near and far guanines are due to quenching of the biphenyl by guanine and dilution of 1O2 by diffusion, respectively. The 1O2-diffusion mapping along DNA duplex provides clues to the development of efficient and selective photosensitizer agents for nucleic acid-targeting photodynamic therapy, as well as an experimental demonstration of diffusion of a particle along cylindrical surface in molecular level.

    DOI: 10.1038/s41598-023-27526-2

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  • 4′-Nitrobiphenyl thioglucoside as the Smallest, fluorescent photosensitizer with cancer targeting ligand Reviewed

    Takashi Kanamori, Yuto Miki, Masataka Katou, Shun-ichiro Ogura, Hideya Yuasa

    Bioorganic & Medicinal Chemistry   61   116737 - 116737   2022.5

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    Authorship:Corresponding author   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.bmc.2022.116737

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  • Recycling of the major thylakoid lipid MGDG and its role in lipid homeostasis in Chlamydomonas reinhardtii Reviewed

    Masako Iwai, Yui Yamada-Oshima, Kota Asami, Takashi Kanamori, Hideya Yuasa, Mie Shimojima, Hiroyuki Ohta

    Plant Physiology   187 ( 3 )   1341 - 1356   2021.7

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    Publishing type:Research paper (scientific journal)   Publisher:Oxford University Press (OUP)  

    Abstract

    Monogalactosyldiacylglycerol (MGDG), the most abundant lipid in thylakoid membranes, is involved in photosynthesis and chloroplast development. MGDG lipase has an important role in lipid remodeling in Chlamydomonas reinhardtii. However, the process related to turnover of the lysogalactolipid that results from MGDG degradation, monogalactosylmonoacylglycerol (MGMG), remains to be clarified. Here we identified a homolog of Arabidopsis thaliana lysophosphatidylcholine acyltransferase (LPCAT) and characterized two independent knockdown (KD) alleles in C. reinhardtii. The enzyme designated as C. reinhardtiiLysolipid Acyltransferase 1 (CrLAT1) has a conserved membrane-bound O-acyl transferase domain. LPCAT from Arabidopsis has a key role in deacylation of phosphatidylcholine (PC). Chlamydomonas reinhardtii, however, lacks PC, and thus we hypothesized that CrLAT1 has some other important function in major lipid flow in this organism. In the CrLAT1 KD mutants, the amount of MGMG was increased, but triacylglycerols (TAGs) were decreased. The proportion of more saturated 18:1 (9) MGDG was lower in the KD mutants than in their parental strain, CC-4533. In contrast, the proportion of MGMG has decreased in the CrLAT1 overexpression (OE) mutants, and the proportion of 18:1 (9) MGDG was higher in the OE mutants than in the empty vector control cells. Thus, CrLAT1 is involved in the recycling of MGDG in the chloroplast and maintains lipid homeostasis in C. reinhardtii.

    DOI: 10.1093/plphys/kiab340

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    Other Link: http://academic.oup.com/plphys/article-pdf/187/3/1341/41073618/kiab340.pdf

  • Affinity Control of Monosaccharide Conjugated Peptides against Lectins with a Set of Amino Acid Substitutions on α‑Helical Structure Reviewed

    Yusuke Maeda, Toshiki Sawada, Tsuyoshi Takahashi, Hideya Yuasa, Hisakazu Mihara

    Bioconjugate Chem.   Vol. 31 ( No. 11 )   2020.10

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  • Photo effect on the CD1d-binding ability of azobenzene-attached analogues of α-GalCer Reviewed

    Takashi Kanamori, Tomoki Numata, Satoshi Kuwabara, Yasuyuki Ishii, Hiroshi Watarai, HIDEYA YUASA

    Bioorganic & Medicinal Chemistry Letters   126960 - 126960   2020.1

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier {BV}  

    DOI: 10.1016/j.bmcl.2020.126960

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  • Cover Feature: A Twist‐Assisted Biphenyl Photosensitizer Passable Through Glucose Channel (Chem. Asian J. 12/2019) Reviewed

    Yuki Tsuga, Masataka Katou, Satoshi Kuwabara, Takashi Kanamori, Shun‐ichiro Ogura, Shigetoshi Okazaki, Hiroyuki Ohtani, Hideya Yuasa

    Chemistry – An Asian Journal   Vol. 14   2019.6

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    DOI: 10.1002/asia.201900457

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  • Water-Soluble Glucosyl Pyrene Photosensitizers: An Intramolecularly Synthesized 2-C-Glucoside and an O-Glucoside Reviewed

    Takashi Kanamori, Akira Matsuyama, Hidenori Naito, Yuki Tsuga, Yoshiki Ozako, Shun-ichiro Ogura, Shigetoshi Okazaki, Hideya Yuasa

    Journal of Organic Chemistry   Vol. 83 ( 22 )   13765 - 13775   2018.10

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society ({ACS})  

    DOI: 10.1021/acs.joc.8b02066

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  • Synthesis of and triplex formation in oligonucleotides containing 2’-deoxy-6-thioxanthosine Reviewed

    Takeshi Inde, Shuhei Nishizawa, Yuusaku Hattori, Takashi Kanamori, Hideya Yuasa, Kohji Seio, Mitsuo Sekine, Akihiro Ohkubo

    Bioorganic and Medicinal Chemistry   2018.7

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    DOI: 10.1016/j.bmc.2018.06.004

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  • pH-Dependent Switching of Base Pairs Using Artificial Nucleobases with Carboxyl Groups Reviewed

    Tanasak Kaewsomboon, Shuhei Nishizawa, Takashi Kanamori, Hideya Yuasa, Akihiro Ohkubo

    J. Org. Chem.   Vol. 83 ( No. 3 )   1320 - 1327   2018.1

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    DOI: 10.1021/acs.joc.7b02828

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  • Coating lanthanide nanoparticles with carbohydrate ligands elicits affinity for HeLa and RAW264.7 cells, enhancing their photodamaging effect Reviewed

    HIDEYA YUASA

    Bioorganic & Medicinal Chemistry   Vol. 25 ( No. 2 )   2017.1

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  • Long Persistent Phosphorescence of Crystalline Phenylboronic Acid Derivatives and Its Mechanistic Study Reviewed

    Shinichi Kuno, Takashi Kanamori, Yijing Zhao, HIROYUKI OHTANI, HIDEYA YUASA

    ChemPhotoChem   Vol. 1 ( No. 3 )   2017.1

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/cptc.201600031

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  • Near-infrared (NIR) up-conversion optogenetics Reviewed

    Shoko Hososhima, Hideya Yuasa, Toru Ishizuka, Mohammad Hoque, Takayuki Yamashita, Akihiro Yamanaka, Eriko Sugano, Hiroshi Tomita, Hiromu Yawo

    Scientific Reports   Vol. 5   16533   2015.11

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    DOI: 10.1038/srep16533

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  • The Effect of Coatings on the Affinity of Lanthanide Nanoparticles to MKN45 and HeLa Cancer Cells and Improvement in Photodynamic Therapy Efficiency Reviewed

    Takashi Sawamura, Tatsumi Tanaka, Hiroyuki Ishige, Masayuki Iizuka, Yasutoshi Murayama, Eigo Otsuji, Akihiro Ohkubo, Shun-Ichiro Ogura, Hideya Yuasa

    International Journal of Molecular Sciences   16 ( 9 )   22415 - 22424   2015.9

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    Authorship:Corresponding author   Publishing type:Research paper (scientific journal)   Publisher:MDPI AG  

    DOI: 10.3390/ijms160922415

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  • Synthesis and triplex-forming properties of oligonucleotides capable of recognizing corresponding DNA duplexes containing four base pairs Reviewed

    Akihiro Ohkubo, Kenji Yamada, Yu Ito, Kiichi Yoshimura, Koichiro Miyauchi, Takashi Kanamori, Yoshiaki Masaki, Kohji Seio, Hideya Yuasa, Mitsuo Sekine

    NUCLEIC ACIDS RESEARCH   43 ( 12 )   5675 - 5686   2015.7

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    DOI: 10.1093/nar/gkv496

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  • A Ring-Flippable Sugar as a Stimuli-Responsive Component of Liposomes Reviewed

    Junji Takeuchi, Akihiro Ohkubo, Hideya Yuasa

    CHEMISTRY-AN ASIAN JOURNAL   10 ( 3 )   586 - 594   2015.3

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/asia.201403271

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  • Visible room-temperature phosphorescence of pure organic crystals via a radical-ion-pair mechanism Reviewed

    Shinichi Kuno, Hiroshi Akeno, Hiroyuki Ohtani, Hideya Yuasa

    Physical Chemistry Chemical Physics   17 ( 24 )   15989 - 15995   2015

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    Authorship:Corresponding author   Publishing type:Research paper (scientific journal)   Publisher:Royal Society of Chemistry (RSC)  

    <p>Hyperfine coupling of a radical ion pair in metal free organic crystals is responsible for room temperature, second-persisting phosphorescence.</p>

    DOI: 10.1039/c5cp01203a

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  • Access to a novel near-infrared photodynamic therapy through the combined use of 5-aminolevulinic acid and lanthanide nanoparticles Reviewed

    Atsushi Shimoyama, Hiroya Watase, Yu Liu, Shun-Ichiro Ogura, Yuichiro Hagiya, Kiwamu Takahashi, Katsushi Inoue, Tohru Tanaka, Yasutoshi Murayama, Eigo Otsuji, Akihiro Ohkubo, Hideya Yuasa

    PHOTODIAGNOSIS AND PHOTODYNAMIC THERAPY   10 ( 4 )   607 - 614   2013.12

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.pdpdt.2013.07.005

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  • Sugar-attached upconversion lanthanide nanoparticles: A novel tool for high-throughput lectin assay Reviewed

    Yu Liu, Takuya Kobayashi, Masayuki Iizuka, Tatsumi Tanaka, Izumi Sotokawa, Atsushi Shimoyama, Yasutoshi Murayama, Eigo Otsuji, Shun-ichiro Ogura, Hideya Yuasa

    BIOORGANIC & MEDICINAL CHEMISTRY   21 ( 11 )   2832 - 2842   2013.6

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.bmc.2013.04.008

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  • Gold nanoparticles conjugated with monosaccharide-modified peptide for lectin detection Reviewed

    Hiroshi Tsutsumi, Hiroyuki Ohkusa, Hyejin Park, Tsuyoshi Takahashi, Hideya Yuasa, Hisakazu Mihara

    Bioorganic and Medicinal Chemistry Letters   22 ( 22 )   6825 - 6827   2012.11

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    DOI: 10.1016/j.bmcl.2012.09.051

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  • Phylogeny of Galactolipid Synthase Homologs Together with their Enzymatic Analyses Revealed a Possible Origin and Divergence Time for Photosynthetic Membrane Biogenesis Reviewed

    Yuichi Yuzawa, Hidenori Nishihara, Tsuyoshi Haraguchi, Shinji Masuda, Mie Shimojima, Atsushi Shimoyama, Hideya Yuasa, Norihiro Okada, Hiroyuki Ohta

    DNA RESEARCH   19 ( 1 )   91 - 102   2012.2

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    DOI: 10.1093/dnares/dsr044

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    Other Link: http://orcid.org/0000-0002-5349-4927

  • A Monogalactosyldiacylglycerol Synthase Found in the Green Sulfur Bacterium Chlorobaculum tepidum Reveals Important Roles for Galactolipids in Photosynthesis Reviewed

    Shinji Masuda, Jiro Harada, Makio Yokono, Yuichi Yuzawa, Mie Shimojima, Kazuhiro Murofushi, Hironori Tanaka, Hanako Masuda, Masato Murakawa, Tsuyoshi Haraguchi, Maki Kondo, Mikio Nishimura, Hideya Yuasa, Masato Noguchi, Hirozo Oh-oka, Ayumi Tanaka, Hitoshi Tamiaki, Hiroyuki Ohta

    PLANT CELL   23 ( 7 )   2644 - 2658   2011.7

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    DOI: 10.1105/tpc.111.085357

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    Other Link: http://orcid.org/0000-0002-5349-4927

  • 2-Oxabutane as a substitute for internal monomer units of oligosaccharides to create lectin ligands Reviewed

    Li-Ying Yang, Yuki Kawada, Lina Bai, Daijiro Kubota, Hideya Yuasa

    ORGANIC & BIOMOLECULAR CHEMISTRY   9 ( 19 )   6579 - 6586   2011

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    DOI: 10.1039/c1ob05775h

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  • Synthesis of a novel class of glycocluster with a cyclic alpha-(1 -&gt; 6)-octaglucoside as a scaffold and their binding abilities to concanavalin A Reviewed

    Li-Ying Yang, Tsuyoshi Haraguchi, Tomoka Inazawa, Susumu Kajiwara, Hideya Yuasa

    CARBOHYDRATE RESEARCH   345 ( 15 )   2124 - 2132   2010.10

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.carres.2010.07.027

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  • A Novel Galactosyltransferase Inhibitor with Diamino Sugar as a Pyrophosphate Mimic Reviewed

    Nobuyuki Mitsuhashi, Hideya Yuasa

    EUROPEAN JOURNAL OF ORGANIC CHEMISTRY   2009 ( 10 )   1598 - 1605   2009.4

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    DOI: 10.1002/ejoc.200801285

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  • A Facile Latex Agglutination Lectin Assay (LALA) for Weakly Binding Ligands Reviewed

    H. Yuasa, T. Haraguchi, T. Itagaki

    JOURNAL OF CARBOHYDRATE CHEMISTRY   28 ( 2 )   78 - 93   2009

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1080/07328300802696207

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  • beta-Selective Glycosidation of a 5-Thioglucosamine Derivative Reviewed

    Hideya Yuasa, Osamu Tsuruta, Takuhiro Izumi, Terunao Takahara, Masayuki Izumi, Hironobu Hashimoto

    CHEMISTRY LETTERS   37 ( 12 )   1288 - 1289   2008.12

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    DOI: 10.1246/cl.2008.1288

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  • Stereoselective Synthesis of 5-Thio-beta-L-Fucopyranosyl Phosphate Reviewed

    Tatsuo Miyazaki, Daisuke Hiyoshi, Masayuki Izumi, Hironobu Hashimoto, Hideya Yuasa

    LETTERS IN ORGANIC CHEMISTRY   5 ( 7 )   576 - 578   2008.10

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    DOI: 10.2174/157017808785982130

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  • Glycosidation reactions of 5-thioxylopyranosyl donors Reviewed

    Hideya Yuasa, Youichiro Suga, Hironobu Hashimoto

    Letters in Organic Chemistry   5 ( 6 )   429 - 431   2008.9

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    DOI: 10.2174/157017808785740390

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  • Syntheses and glycosidation reactions of 6-thiosialosyl donors Reviewed

    Hideya Yuasa, Yoshitaka Tanetani, Tatsuo Miyazaki, Masayuki Izumi, Hironobu Hashimoto

    LETTERS IN ORGANIC CHEMISTRY   5 ( 4 )   262 - 264   2008.6

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    DOI: 10.2174/157017808784049434

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  • Syntheses of 5-Thio-D-Mannose from Petrochemicals and a Disaccharide Analog Containing It Reviewed

    H. Yuasa, M. Joyabu, N. Mitsuhashi, HIRONOBU HASHIMOTO

    Res. Lett. Org. Chem.   ( # doi:10.1155/2008/784173 )   2008.1

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  • A novel 5-thioglycosylation method with 1,5-dithioglycosyl donors: relevance to exo- versus endocyclic activation Reviewed

    Hideya Yuasa, Osamu Tsuruta, Hironobu Hashimoto

    TETRAHEDRON LETTERS   48 ( 45 )   7953 - 7956   2007.11

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.tetlet.2007.09.056

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  • Pentamer is the minimum structure for oligomannosylpeptoids to bind to concanavalin A Reviewed

    Hideya Yuasa, Hiroyuki Honma, Hironobu Hashimoto, Miyuki Tsunooka, Kyoko Kojima-Aikawa

    BIOORGANIC & MEDICINAL CHEMISTRY LETTERS   17 ( 18 )   5274 - 5278   2007.9

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.bmcl.2006.12.075

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  • A novel proton-selective sensor based on a sugar with hinge flexibility Reviewed

    Hideya Yuasa, Naohiko Fujii, Shun Yamazaki

    ORGANIC & BIOMOLECULAR CHEMISTRY   5 ( 18 )   2920 - 2924   2007

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    DOI: 10.1039/b709115j

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  • Chemoenzymatic synthesis of thio-nod factor intermediates - Enzymatic transfer of glucosamine on thiochitobiose derivatives Reviewed

    Latino Loureiro Morais, Hideya Yuasa, Khalil Bennis, Isabelle Ripoche, France-Isabelle Auzanneau

    CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE   84 ( 4 )   587 - 596   2006.4

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    DOI: 10.1139/V06-043

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  • Synthesis of bisubstrate analogues targeting alpha-1,3-fucosyltransferase and their activities Reviewed

    M Izumi, S Kaneko, H Yuasa, H Hashimoto

    ORGANIC & BIOMOLECULAR CHEMISTRY   4 ( 4 )   681 - 690   2006.2

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    DOI: 10.1039/b513897c

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  • Exploitation of sugar ring flipping for a hinge-type tether assisting a [2+2] cycloaddition Reviewed

    Hideya Yuasa, Masatoshi Nakatani, Hironobu Hashimoto

    ORGANIC & BIOMOLECULAR CHEMISTRY   4 ( 19 )   3694 - 3702   2006

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    DOI: 10.1039/b609115f

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  • An improvement in the bending ability of a hinged trisaccharide with the assistance of a sugar-sugar interaction Reviewed

    H Yuasa, T Izumi, N Mitsuhashi, Y Kajihara, H Hashimoto

    CHEMISTRY-A EUROPEAN JOURNAL   11 ( 22 )   6478 - 6490   2005.11

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    DOI: 10.1002/chem.200500096

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  • Synthesis of bisubstrate and donor analogues of sialyltransferase and their inhibitory activities Reviewed

    M Izumi, K Wada, H Yuasa, H Hashimoto

    JOURNAL OF ORGANIC CHEMISTRY   70 ( 22 )   8817 - 8824   2005.10

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    DOI: 10.1021/jo0512608

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  • Synthesis and evaluation of 5-thio-L-fucose-containing oligosaccharide Reviewed

    M Izumi, O Tsuruta, Y Kajihara, S Yazawa, H Yuasa, H Hashimoto

    CHEMISTRY-A EUROPEAN JOURNAL   11 ( 10 )   3032 - 3038   2005.5

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    DOI: 10.1002/chem.200400831

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  • Hinge sugar as a movable component of an excimer fluorescence sensor Reviewed

    H Yuasa, N Miyagawa, T Izumi, M Nakatani, M Izumi, H Hashimoto

    ORGANIC LETTERS   6 ( 9 )   1489 - 1492   2004.4

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    DOI: 10.1021/ol049628v

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  • Switching extended 1,3-diequatorial and bent 1,3-diaxial states of a disubstituted hinge sugar by ligand exchange reactions on Pt(II) Reviewed

    T Izumi, H Hashimoto, H Yuasa

    CHEMICAL COMMUNICATIONS   ( 1 )   94 - 95   2004.1

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    DOI: 10.1039/b311811h

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  • A tong-like fluorescence sensor for metal ions: perfect conformational switch of hinge sugar by pyrene stacking Reviewed

    H Yuasa, N Miyagawa, M Nakatani, M Izumi, H Hashimoto

    ORGANIC & BIOMOLECULAR CHEMISTRY   2 ( 24 )   3548 - 3556   2004

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    DOI: 10.1039/b411344f

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  • Synthesis of GDP-5-thiosugars and their use as glycosyl donor substrates for glycosyltransferases Reviewed

    O Tsuruta, H Yuasa, H Hashimoto, K Sujino, A Otter, H Li, MM Palcic

    JOURNAL OF ORGANIC CHEMISTRY   68 ( 16 )   6400 - 6406   2003.8

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    DOI: 10.1021/jo0300035

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  • Mannose-BSA conjugates: Comparison between commercially available linkers in reactivity and bioactivity Reviewed

    M Izumi, S Okumura, H Yuasa, H Hashimoto

    JOURNAL OF CARBOHYDRATE CHEMISTRY   22 ( 5 )   317 - 329   2003

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    DOI: 10.1081/CAR-120023475

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  • Glycosidase inhibition by cyclic sulfonium compounds Reviewed

    H Yuasa, J Takada, H Hashimoto

    BIOORGANIC & MEDICINAL CHEMISTRY LETTERS   11 ( 9 )   1137 - 1139   2001.5

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    DOI: 10.1016/S0960-894X(01)00155-X

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  • Synthesis and biological evaluation of α-L-fucosidase inhibitors: 5a-carba-α-L-fucopyranosylamine and related compounds Reviewed

    Seiichiro Ogawa, Ayako Maruyama, Takashi Odagiri, Hideya Yuasa, Hironobu Hashimoto

    European Journal of Organic Chemistry   ( 5 )   967 - 974   2001

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    DOI: 10.1002/1099-0690(200103)2001:5<967::AID-EJOC967>3.0.CO;2-J

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  • Synthesis of salacinol Reviewed

    H. Yuasa, J. Takada, H. Hashimoto

    Tetrahedron Letters   41 ( 34 )   6615 - 6618   2000.8

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    DOI: 10.1016/S0040-4039(00)01129-1

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  • Pseudosugars, 41 - Synthesis and glycosidase inhibitory activity of 5a-carba-alpha-DL-fucopyranosylamine and -galactopyranosylamine Reviewed

    S Ogawa, R Sekura, A Maruyama, H Yuasa, H Hashimoto

    EUROPEAN JOURNAL OF ORGANIC CHEMISTRY   ( 11 )   2089 - 2093   2000.6

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    DOI: 10.1002/1099-0690(200006)2000:11<2089::AID-EJOC2089>3.3.CO;2-P

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  • Synthesis and ring-opening reaction of 1,6-anhydro-6-deoxy-6-thio-2,3, 4-tri-O-benzyl-beta-D-glucopyranose Reviewed

    K Hatanaka, M Shirasaka, M Katayose, N Watanabe, H Yuasa, H Hashimoto

    POLYMER JOURNAL   32 ( 3 )   297 - 299   2000

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    DOI: 10.1295/polymj.32.297

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  • Synthesis and evaluation of α-fucosidase inhibitory activity of 5a-Carba-α-L-fucopyranose and α-DL-fucopyranosylamine Reviewed

    S. Ogawa, R. Sekura, A. Maruyama, T. Odagiri, H. Yuasa, H. Hashimoto

    Carbohydrate Letters   4 ( 1 )   13 - 20   2000

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  • Bending trisaccharides by a chelation-induced ring flip of a hinge-like monosaccharide unit Reviewed

    Hideya Yuasa, Hironobu Hashimoto

    Journal of the American Chemical Society   121 ( 21 )   5089 - 5090   1999.6

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    DOI: 10.1021/ja984062p

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  • Affinity of 5-thio-L-fucose-containing Lewis X (Le(X)) trisaccharide analogs to anti-Le(X) monoclonal antibody Reviewed

    O Tsuruta, H Yuasa, H Hashimoto, S Kurono, S Yazawa

    BIOORGANIC & MEDICINAL CHEMISTRY LETTERS   9 ( 7 )   1019 - 1022   1999.4

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    DOI: 10.1016/S0960-894X(99)00124-9

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  • Syntheses of two trimannose analogs each containing C-mannosyl or 5- thio-C-mannosyl residue: Their affinities to concanavalin A Reviewed

    Osamu Tsuruta, Hideya Yuasa, Sadamu Kurono, Hironobu Hashimoto

    Bioorganic and Medicinal Chemistry Letters   9 ( 6 )   807 - 810   1999.3

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    DOI: 10.1016/S0960-894X(99)00087-6

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  • Studies on the unusual stability of cis-2,5-diethoxy-2,5- bis(hydroxymethyl)-1,4-dioxane Reviewed

    Hideya Yuasa, Hironobu Hashimoto, Yutaka Abe, Tetsuya Kajimoto, Chi-Huey Wong

    Tetrahedron   55 ( 8 )   2193 - 2204   1999.2

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    DOI: 10.1016/S0040-4020(99)00003-4

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  • Glycosyltransfer mechanism of alpha-glucosyltransferase from Protaminobacter rubrum Reviewed

    H Kakinuma, H Yuasa, H Hashimoto

    CARBOHYDRATE RESEARCH   312 ( 3 )   103 - 115   1998.11

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    DOI: 10.1016/S0008-6215(98)00225-0

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  • Solid phase synthesis of oligomannopeptoids that mimic the concanavalin A-binding trimannoside Reviewed

    Hideya Yuasa, Yujiro Kamata, Sadamu Kurono, Hironobu Hashimoto

    Bioorganic and Medicinal Chemistry Letters   8 ( 16 )   2139 - 2144   1998.8

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    DOI: 10.1016/S0960-894X(98)00364-3

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  • Synthesis of 5-thiomannose-containing oligomannoside mimics: Binding abilities to concanavalin A Reviewed

    H Yuasa, S Matsuura, H Hashimoto

    BIOORGANIC & MEDICINAL CHEMISTRY LETTERS   8 ( 11 )   1297 - 1300   1998.6

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    DOI: 10.1016/S0960-894X(98)00207-8

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  • UDP-N-acetyl-5-thio-galactosamine is a substrate of lactose synthase Reviewed

    O Tsuruta, G Shinohara, H Yuasa, H Hashimoto

    BIOORGANIC & MEDICINAL CHEMISTRY LETTERS   7 ( 19 )   2523 - 2526   1997.10

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    DOI: 10.1016/S0960-894X(97)10009-9

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  • Relative Nucleophilicity of the Two Sulfur Atoms of 1,5-Dithioglucopyranoside Reviewed

    H. Yuasa, Y. Kamata, H. Hashimoto

    Angew. Chem. Int. Ed. Engl.   Vol. 36 ( No. )   868   1997

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  • p-nitrophenyl 1,5-dithio-alpha-L-fucopyranoside: A novel sulfur based fucosidase inhibitor Reviewed

    O Tsuruta, H Yuasa, H Hashimoto

    BIOORGANIC & MEDICINAL CHEMISTRY LETTERS   6 ( 16 )   1989 - 1992   1996.8

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    DOI: 10.1016/0960-894X(96)00356-3

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  • Synthesis of methyl 5'-thio-alpha-isomaltoside via an acyclic monothioacetal and its behavior toward glucoamylase Reviewed

    H Hashimoto, M Kawanishi, H Yuasa

    CHEMISTRY-A EUROPEAN JOURNAL   2 ( 5 )   556 - 560   1996.5

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    DOI: 10.1002/chem.19960020515

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  • Synthesis of 1',6'-disubstituted sucroses and their behavior as glucosyl donors for a microbial alpha-glucosyltransferase Reviewed

    H Kakinuma, H Yuasa, H Hashimoto

    CARBOHYDRATE RESEARCH   284 ( 1 )   61 - 72   1996.4

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    DOI: 10.1016/0008-6215(96)00002-X

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  • Novel conversion of aldopyranosides into 5-thioaldopyranosides via acyclic monothioacetals with inversion and retention of configuration at C-5 Reviewed

    H Hashimoto, M Kawanishi, H Yuasa

    CARBOHYDRATE RESEARCH   282 ( 2 )   207 - 221   1996.3

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    DOI: 10.1016/0008-6215(95)00386-X

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  • Importance of ring sulfur and anomeric hydroxyl for inhibitory activity of 5-thiofucose toward alpha-fucosidases Reviewed

    Hideya Yuasa

    Carbohydr. Lett.   2   23   1996

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  • Synthesis of the carbocyclic analog of uridine 5'-(alpha-D-galactopyranosyl diphosphate) (UDP-Gal) as an inhibitor of beta(1-&gt;4)-galactosyltransferase Reviewed

    H Yuasa, MM Palcic, O Hindsgaul

    CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE   73 ( 12 )   2190 - 2195   1995.12

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    DOI: 10.1139/v95-272

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  • Synthesis of iminothiasugar as a potential transition-state analog inhibitor of glycosyltransfer reactions Reviewed

    Hideya Yuasa, Tetsuya Kajimoto, Chi-Huey Wong

    Tetrahedron Letters   35 ( 44 )   8243 - 8246   1994.10

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    DOI: 10.1016/0040-4039(94)88293-2

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  • FACTORS INFLUENCING STEREOSELECTIVITY OF SULFUR OXIDATION - SUBSTITUENT EFFECTS ON THE OXIDATION OF 5-THIOGLYCOPYRANOSE DERIVATIVES Reviewed

    H YUASA, H HASHIMOTO

    TETRAHEDRON   49 ( 40 )   8977 - 8998   1993.10

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    DOI: 10.1016/S0040-4020(01)91217-7

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  • Chemical-enzymic synthesis of 5'-thio-N-acetyllactosamine: the first disaccharide with sulfur in the ring of the non-reducing sugar Reviewed

    Hideya Yuasa, Ole Hindsgaul, Monica M. Palcic

    Journal of the American Chemical Society   114 ( 14 )   5891 - 5892   1992.7

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    DOI: 10.1021/ja00040a080

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  • NEW AND FACILE SYNTHETIC ROUTES TO 5-THIOALDOHEXOPYRANOSIDES VIA ALDOSE MONOTHIOACETAL DERIVATIVES Reviewed

    H HASHIMOTO, M KAWANISHI, H YUASA

    TETRAHEDRON LETTERS   32 ( 48 )   7087 - 7090   1991.11

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    DOI: 10.1016/0040-4039(91)85047-9

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  • SYNTHESIS OF 5-THIO-L-FUCOSE AND ITS INHIBITORY EFFECT ON FUCOSIDASE Reviewed

    H HASHIMOTO, T FUJIMORI, H YUASA

    JOURNAL OF CARBOHYDRATE CHEMISTRY   9 ( 5 )   683 - 694   1990

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    DOI: 10.1080/07328309008543863

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  • Synthesis of Per-O-alkylated 5-Thio-D-glucono-1,5-lactones and Transannular Participation of the Ring Sulfur Atom of 5-Thio-D-glucose Derivatives on Solvolysis under Acidic Conditions Reviewed

    H. Yuasa, J. Tamura, H. Hashimoto

    J. Chem. Soc. Perkin Trans. 1   Vol. ( No. )   2763   1990

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    DOI: 10.1039/p19900002763

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  • Stereoselectivity in the Oxidation of 5-Thio-glucose Derivatives with 3-Chloroperoxybenzoic Acid Reviewed

    H. Yuasa, A. Takenaka, H. Hashimoto

    Bull. Chem. Soc. Jpn.   Vol. 63 ( No. )   3473 - 3479   1990

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    DOI: 10.1246/bcsj.63.3473

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  • Synthesis of 5-Thio-D-Mannose Reviewed

    Hideya Yuasa, Yoshio Izukawa, Hironobu Hashimoto

    Journal of Carbohydrate Chemistry   8 ( 5 )   753 - 763   1989.12

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    DOI: 10.1080/07328308908048037

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  • SULFUR PARTICIPATION IN METHANOLYSIS AND ACETOLYSIS OF 5-DEOXY-5-THIO-D-GLUCOSE DERIVATIVES Reviewed

    H HASHIMOTO, H YUASA

    TETRAHEDRON LETTERS   29 ( 16 )   1939 - 1942   1988

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    DOI: 10.1016/S0040-4039(00)82084-5

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▼display all

Books

  • レクチンタンパク質をはかる

    2009 

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  • バイオ系のための基礎化学問題集

    講談社サイエンティフィック  2008 

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  • トコトンやさしいタンパク質の本

    日刊工業新聞社  2007 

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MISC

  • 二重鎖DNAに沿った1O2拡散パターンの可視化 Invited

    金森功吏, 湯浅英哉

    光アライアンス   34 ( 8 )   22 - 25   2023.8

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  • 近赤外光を用いた光線力学治療への展開 Invited Reviewed

    湯浅英哉

    CSJ Current Review   42   46 - 51   2021.12

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  • がんの光線力学治療を指向した小さな光増感剤開発 Invited

    湯浅英哉, 金森功吏

    光アライアンス   32 ( 6 )   14 - 17   2021.6

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  • 小さな光増感剤への期待と課題

    湯浅英哉, 金森功史

    JPA日本光線力学学会NEWS LETTER   ( 24 )   5 - 7   2021.3

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  • 重原子不要な励起三重項生成法:スピン軌道電荷移動 Reviewed

    湯浅英哉, 津賀雄輝

    光化学   2019.12

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  • New photosensitisers for photodynamic therapy Invited

    Hideya Yuasa

    Research OUTREACH   2019.9

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  • Intersystem Crossing Mechanisms in the Room Temperature Phosphorescence of Crystalline Organic Compounds Reviewed

    Shinichi Kuno, HIDEYA YUASA

    Bull. Chem. Soc. Jpn.   Vol. 21 ( No. 2 )   223 - 229   2018.2

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    Authorship:Corresponding author   Language:English   Publisher:Chemical Society of Japan  

    DOI: 10.1246/bcsj.20170364

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  • 室温燐光を発する有機化合物結晶とその項間交差メカニズム Reviewed

    久野信一, 湯浅英哉

    光化学   2017.12

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  • ランタニドナノ粒子を用いた光線力学治療技術の開発

    湯浅英哉, 小倉俊一郎

    化学工業   2016.8

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  • Near-infrared (NIR) optogenetics using up-conversion system

    Shoko Hososhima, Hideya Yuasa, Toru Ishizuka, Hiromu Yawo

    2016.2

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  • ラジカル対項間交差三重項生成機構による重原子フリー室温燐光

    湯浅英哉

    先端錯体工学研究会(SPACC)ニュースレター   2015.10

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  • ランタニドナノ粒子アップコンバージョン効果による近赤外オプトジェネティクス

    八尾寛, 八尾寛, 細島頌子, 阿部健太, 湯浅英哉, 菅野江里子, 冨田浩史, 石塚徹

    ナノ学会大会講演予稿集   13th   2015

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    Publishing type:Research paper, summary (national, other academic conference)  

    J-GLOBAL

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  • Imaging of deeply located cancerous lesions using 5-aminolevulinic acid and lanthanide nanoparticles

    Murayama, Y., Ogura, S.-I., HIDEYA YUASA, Otsuji, E.

    Transactions of Japanese Society for Medical and Biological Engineering   Vol. 52   2014

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    DOI: 10.11239/jsmbe.52.SY-64

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  • 東工大英単

    佐伯泰樹, 上西哲雄, 小川高義, 石原由貴, 原田大介, 田村斉敏, 薩摩竜郎, 北川依子, リース・モートン, 時田アリソン, 木山ロリンダ, 高柳邦夫, 佐藤勲, 古井貞熙, 湯浅英哉, 坂本啓

    2011.2

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  • レクチンタンパク質をはかる

    湯浅英哉

    2009.4

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    Language:Japanese   Publisher:酵素・タンパク質をはかる・とらえる・利用する  

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  • モレキュラーマシンの部品としての糖鎖

    湯浅英哉

    複合糖質の化学と最新応用技術   221 - 227   2009.1

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  • Bisubstrate Analogues as Glycosyltransferase Inhibitors

    Masayuki Izumi, Hideya Yuasa, Hironobu Hashimoto

    CURRENT TOPICS IN MEDICINAL CHEMISTRY   9 ( 1 )   87 - 105   2009.1

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    Language:English   Publishing type:Book review, literature introduction, etc.  

    DOI: 10.2174/156802609787354351

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  • Thiasugars: Potential glycosidase inhibitors

    Hideya Yuasa, Masayuki Izumi, Hironobu Hashimoto

    Current Topics in Medicinal Chemistry   9 ( 1 )   76 - 86   2009

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    Authorship:Lead author   Language:English   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)  

    DOI: 10.2174/156802609787354270

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  • Editorial Reviewed

    Seiichiro Ogawa, Hideya Yuasa

    Current Topics in Medicinal Chemistry   9 ( 1 )   1 - 2   2009

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  • バイオ系のための基礎化学問題集

    三原久和, 梶原将, 湯浅英哉, 小畠英理

    2008

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  • トコトンやさしいタンパク質の本

    湯浅英哉

    Vol.   2007.3

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  • 糖の環フリップ:ナノテクノロジーが明かすその機能と応用

    湯浅英哉

    化学と生物   45 ( 8 )   582 - 585   2007

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    Language:Japanese   Publisher:Japan Society for Bioscience, Biotechnology, and Agrochemistry  

    DOI: 10.1271/kagakutoseibutsu1962.45.582

    CiNii Books

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    Other Link: https://jlc.jst.go.jp/DN/JALC/00298612930?from=CiNii

  • Ring flip of carbohydrates: Functions and applications

    Hideya Yuasa

    TRENDS IN GLYCOSCIENCE AND GLYCOTECHNOLOGY   18 ( 104 )   353 - 370   2006.11

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    Language:English   Publishing type:Book review, literature introduction, etc.  

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  • Top-down and bottom-up nanotechnologies to make carbohydrates more flexible

    H. Yuasa

    Nanotechnology in Carbohydrate Chemistry, Ed by H. Yuasa, Transworld Research Network   127 - 148   2006

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  • 「多糖の生成・構造形成・機能に学ぶ」

    湯浅英哉

    ファイバー”スーパーバイオミメティクス―近未来の新技術創製― NTS   136 - 140   2006

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  • Thiasugars as potential glycosidase inhibitor

    H Yuasa, M Izumi, H Hashimoto

    JOURNAL OF SYNTHETIC ORGANIC CHEMISTRY JAPAN   60 ( 8 )   774 - 782   2002.8

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    Language:Japanese   Publishing type:Book review, literature introduction, etc.  

    DOI: 10.5059/yukigoseikyokaishi.60.774

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  • Design syntheses of inhibitors of glycoenzymes

    H Yuasa, C Saotome, O Kanie

    TRENDS IN GLYCOSCIENCE AND GLYCOTECHNOLOGY   14 ( 78 )   231 - 251   2002.7

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    Language:English   Publishing type:Book review, literature introduction, etc.  

    DOI: 10.4052/tigg.14.231

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  • Design syntheses of inhibitors of glycoenzymes

    Hideya Yuasa, Chikako Saotome, Osamu Kanie

    Trends in Glycoscience and Glycotechnology   14 ( 78 )   231 - 251   2002

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    Language:English   Publishing type:Book review, literature introduction, etc.   Publisher:Gakushin Publishing Company  

    DOI: 10.4052/tigg.14.231

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  • Thiasugars as potential glycosidase inhibitor

    Hideya Yuasa, Masayuki Izumi, Hironobu Hashimoto

    Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry   60 ( 8 )   774 - 782   2002

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    Language:Japanese   Publisher:Society of Synthetic Organic Chemistry  

    DOI: 10.5059/yukigoseikyokaishi.60.774

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  • Recent advances in the development of unnatural oligosaccharides - Conformation and bioactivity

    H Yuasa, H Hashimoto

    TRENDS IN GLYCOSCIENCE AND GLYCOTECHNOLOGY   13 ( 69 )   31 - 55   2001.1

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    Language:English   Publishing type:Book review, literature introduction, etc.  

    DOI: 10.4052/tigg.13.31

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  • 非天然型オリゴ糖開発の現状―立体配座と生理活性

    湯浅 英哉, 橋本弘信

    Trends in Glycoscience and Glycotechnology   13 ( 69 )   31 - 55   2001

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  • Creation of a DNA-Binding Oligosaccharide

    YUASA Hideya

    12 ( 66 )   267 - 268   2000.7

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    Language:Japanese  

    CiNii Books

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  • Replacing the ring oxygen of carbohydrates with sulfur: its biological and chemical consequences

    H. Yuasa, HIRONOBU HASHIMOTO

    Reviews on Heteroatom Chemistry   19   35   1999

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  • Basic Studies toward Thiasugar-Containing Artificial Oligosaccharides

    YUASA Hideya

    51 ( 2 )   187 - 190   1998

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    Language:Japanese  

    CiNii Books

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  • Glycosyltransferases in the Synthesis of Oligosaccharide Analogs.

    Palcic Monica M., Hindsgaul Ole

    TIGG   8 ( 39 )   37 - 49   1996

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    Language:Japanese   Publisher:FCCA(Forum: Carbohydrates Coming of Age)  

    The glycosyltransferase-mediated synthesis of oligosaccharide analogs is reviewed, with emphasis on the use of modified sugar-nucleotide donors or modified acceptors as substrates. A survey of the most studied enzymes: β(1→4)-galactosyltransferase, N-Acetylglucosaminyltransferase I, α(1→3/4)-fucosyltransferases and α(2→3 or 2→6)-sialyltransferases, shows them to be very useful for the rapid production of chemically modified di-, tri- and tetrasaccharide analogs.

    DOI: 10.4052/tigg.8.37

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  • 5-チオアルドヘキソピラノース誘導体の合成、反応及び生理活性

    湯浅英哉

    1991.3

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  • STEREOELECTRONIC EFFECTS IN THE OXIDATION OF RING SULFUR ATOM OF 5-THIO-D-GLUCOSE DERIVATIVES

    H YUASA, H HASHIMOTO

    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY   199   51 - CARB   1990.4

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    Language:English   Publishing type:Research paper, summary (international conference)  

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Awards

  • LASER WEEK IN KOCHI 3学会会長賞

    2020.10  

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  • 手島精一記念研究賞(発明賞)

    2017.2  

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  • 第1回東京工業大学挑戦的研究賞

    2002  

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    Country:Japan

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  • 東京工業大学糖鎖研究会奨励賞(山形達也賞)

    1998  

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    Country:Japan

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  • 第7回有機合成化学協会高砂香料工業研究企画賞

    1995  

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    Country:Japan

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Research Projects

  • The synthesis of a photoactivatable alpha-GalCer derivative that maintains immunostimulative activty by evading anergy induction

    Grant number:17K19194  2017.6 - 2020.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Challenging Research (Exploratory)

    YUASA HIDEYA

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    Grant amount:\6240000 ( Direct Cost: \4800000 、 Indirect Cost:\1440000 )

    Galactosylceramide (GalCer) is recognized by the CD1d proteins on antigen-presenting cells at the ceramide moiety and the galactose moiety is presented to iNKT cells, which stimulates the immune responses. However, the immune suppression by repeated injection of GalCer has discouraged its development as an anti-cancer agent. To overcome the shortcoming by spatiotemporal restriction of its exposure, we synthesized the photochromic azobenzene-incorporated analogues and tested the photo-immunoregulation effect of in its binding to CD1d. FACS analyses indicated that some of these analogues enhanced the affinity to CD1d on photo-irradiation by about 20%. A docking simulation suggests that the photochromic molecule should be bulkier for a clearer discrimination between on and off states. We thus started the design and synthesis of bulkier azobenzene-incorporated analogues.

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  • Design and synthesis of heavy atom-free photosensitizers based on the biradical intersystem crossing mechanism and its application to photodynamic therapy

    Grant number:16H04176  2016.4 - 2021.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    YUASA HIDEYA

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    Grant amount:\17810000 ( Direct Cost: \13700000 、 Indirect Cost:\4110000 )

    We succeeded in the development of biphenyl derivatives as a new intramolecular CT photosensitizer on the basis of our own triplet-producing mechanism. We exploited this photosensitizer for the photodynamic damage of cancer cells. We also found that the biphenyl photosensitizer can be excited by two-photon excitation with a near-infrared laser, which enables deep-tissue entry. Overall, we have accomplished almost all the goals first planned, except for animal experiments.

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  • Near infrared upconversion optogenetics

    Grant number:15K15025  2015.4 - 2017.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Challenging Exploratory Research

    Yawo Hiromu, ISHIZUKA Toru, YUASA Hideya

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    Grant amount:\3770000 ( Direct Cost: \2900000 、 Indirect Cost:\870000 )

    Optogenetics is an innovative neuroscience method to control the neural activity even in a living animal. The near infrared (NIR) light (wavelength, 650-1450 nm) penetrates deeper in tissues than the visible light, and is a candidate signal to the brain from outside of the body. However, there have not been the tools to catch the near infrared signal for optogenetics. The lanthanide nanoparticles (LNPs), composed of rare-earth elements, absorb low-energy NIR light to emit high-energy visible light (up-conversion). We created a hybrid optogenetic system which consists of the donor LNPs and the acceptor ChRs which are highly sensitive to the emission wavelengths of LNPs. When the NIR laser light was applied to nearby LNPs, the membrane potential was depolarized to evoke action potentials. It is suggested that the green luminescent light emitted from UCNPs effectively activated ChRs to generate enough large photocurrent to change neural activities even in the living animal.

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  • Development of a boric acid-capturing molecular device using inositol ring inversion

    Grant number:24550148  2012.4 - 2015.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    YUASA Hideya

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    Grant amount:\5590000 ( Direct Cost: \4300000 、 Indirect Cost:\1290000 )

    Monosaccharides like glucose have a foldable hexagonal structure. They can be exploited as a component of motional molecular devices, if we can control the folding structure by a signal molecule. We synthesized a monosaccharide with two long methylene chains that can change structures from linear to parallel chains by zinc ion. This monosaccharide with zinc ion forms a lipid bilayer structure by aggregation like cell membrane lipids, enabling incorporation of a lipophilic substance. In acidic conditions, this liposome structure is decomposed releasing the inner substances, because the parallel chain is turned back into the linear chain. The stimuli responsive liposome can be a new drug delivery system.

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  • 環境汚染海藻由来多糖の機能化による分子デバイスの開発

    Grant number:19655056  2007 - 2008

    日本学術振興会  科学研究費助成事業  萌芽研究

    湯浅 英哉

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    Grant amount:\3300000 ( Direct Cost: \3300000 )

    本研究では、地中海で大繁殖している環境汚染海藻イチイヅタの主成分であるべータ1-3キシラン(13Xylan)の有効利用に資するための基礎検討を目的とする。13Xylanは、各キシロース単糖の環フリップにより、蛇腹のような伸縮運動を起こすことが期待できる。そこで、原子間力顕微鏡(AFM)を用いた引っ張り実験により、13Xylanを各種条件下で引っ張り、その伸縮性を確かめる。本研究ではタカノハヅタから13Xylanの単離を行うことに成功した。また、ゲルろ過法により高分子分画と低分子分画に分離し、それぞれに対し糖定量分析を用いることにより、平均重合度88と40の13Xylanを得ることができた。AFM測定の結果、キシランの平均長は550nmであった。Worm-LikeChainモデルにあてはめてフォースカーブを解析することにより、高分子の柔軟性を示すパラメーターであるPersistence Lengthを求めると、0.41nmが算出された。フォースカーブはカードランで観察されるプラトーが観察されず、螺旋構造をとらないことが推定された。しかし、金属の添加で伸縮性が変化する結果は得られなかった。いっぽう、キシロースの2,4位にカルボキシメチル基を導入した化合物は、亜鉛イオンやランタニドイオンの添加により立体配座が逆イス型へと100%変換することが明らかになった。これにより、13Xylanをカルボキシメチル化することにより分子蛇腹作製することへの期待をつなぐ結果となった。

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  • CONSTRUCTION OF NOBEL PLIERS-LIKES A CCHARIDE-RECEPTOR SENSORS USING THE RING FLIP OF XYLOSE

    Grant number:17550151  2005 - 2006

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    YUASA Hideya

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    Grant amount:\3600000 ( Direct Cost: \3600000 )

    Some of bacteria infect human through the recognition of cell surface oligosaccharides. Thus the sensors detecting the oligosaccharide receptors are expected to be the diagnostic tools for the bacteria. We have succeeded in synthesizing a molecule that permit pliers-like motion and developed a metal ion sensor that gives excimer fluorescence on chelation to a metal ion through the closure of the molecular pliers. If we can attach two identical saccharides at the handles of the molecular pliers, this would permit chelation to two subsites of the recognition pocket of a saccharide receptor. This study aims at synthesizing a sensor for a relatively low-priced lectin to optimize the structural prerequisites to be a practical lectin sensor. We attached pyrenyl and naphthyl groups at 2,4-positons and two mannose residues at 1,3-positions of xylose through alkyl chain spacers. Although the naphthyl-based sensor did not work, the pyrene-based sensor worked and showed a fluorescence change upon addition of a lectin. As opposed to the expectation, the monomer fluorescence increased and the excimer fluorescence decreased as the lectin was added. This finding will be important to develop on-chip lectin sensors. We also succeeded in synthesizing a proton-selective sensor and a tether for a [2+2] photocycloaddition reaction using the pliers-like molecule.

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  • Study for Establishment of a Program Officer System of the Gant-in-Aid for Scientific Research

    Grant number:16800053  2004 - 2005

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Special Purposes

    HASUO Masahiro, AKAIKE Takaaki, YUASA Hideya, ARIMOTO Kazuhiro, SUZUKAWA Kazumi, SHINSHI Tadahiko

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    Grant amount:\8000000 ( Direct Cost: \8000000 )

    The results of this survey study for establish of a new program officer (PO) system of the Grant-in-Aid for Scientific Research (Kakenhi) are as follows;
    1 Survey study on foreign competitive research funding systems and their PO systems
    We on-site visited NIH and NSF (USA), RC (UK), A*STAR (Singapore), NSC (Taiwan), KRF (Republic of Korea), HFSP (Japan-North America-Europe), ESF (EU) and DFG (Germany) to learn and investigate their competitive research funds or grants and their PO systems.
    2 Survey study on domestic competitive research funding systems and their PO systems
    We learned and investigated competitive research fund or grant systems and PO systems of the Kakenhi (MEXT and JSPS), the Special Coordination Funds for Promoting Science and Technology (JST), the Industrial Technology Research and Development Projects (NEDO) and Research project for Utilizing Advanced Technologies in Agriculture, Forestry and Fisheries, Technical Development Program for Making Agribusiness in the Form of Utilizing the Concentrated Know-How from Private Sector (MAFF). We made a list about them for comparison.
    3 Inquiry surveys on the PO system in Kakenhi of MEXT
    We carried out questionnaire surveys on roles and operations of POs in the Kakenhi system of MEXT, their possible carrier plan, and so on, to members of the referee boards, researchers supported by the Kakenhi of MEXT and PO's affiliations. The results were analyzed to extract their awareness, understanding, opinions and demands for the Kakenhi.
    4 Enlightenment activities and inquiry surveys on the Kakenhi and PO systems
    With a proposal of this project we carried out symposiums and panel discussions on the Kakenhi and PO systems in annual meetings of the Chemical Society of Japan, the Japan Society of Mechanical Engineers and the Japanese Biochemical Society. We also carried out questionnaire surveys on the Kakenhi and PO systems to participants on site. The results are analyzed to extract their awareness, understanding, opinions and demands for the Kakenhi. The results were also utilized to validate the effect of our enlightenment activities.

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  • CONSTRUCTION OF FUNCTIONAL MOLECULES USING FLEXIBILITY AND ALLOSTERY OF HINGE SUGAR

    Grant number:13680668  2001 - 2004

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    YUASA Hideya

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    Grant amount:\3600000 ( Direct Cost: \3600000 )

    Hinge motions play crucial roles in the functions of motor proteins, signal transducers, and allosteric enzymes. Thus, mimicking the hinge regions of these natural molecular machines with small molecules is the basis for the construction of smaller molecular machines and devices. We brought β-xylopyranosides into focus as potential hinge molecules, because these molecules are prone to undergo a ring-flip, which accompanies the conversion of the all equatorial substituents into axial orientations in a pliers-like manner. The same ring-flip is more difficult with the corresponding substituted-cyclohexanes because of the lack of anomeric effect and the existence of an additional axial hydrogen atom. In our continuing efforts to create molecular devices from xylopyranosides, we invented "hinge sugars," 2,4-diamino-2,4-dideoxy-β-xylopyranosides, which shifts the conformation from C1 to 1C in response to a metal ion. In this stucy, we were able to fix this hinge sugar in 1C conformation by forming a Pt^<2+> complex or by N,N'-carbonylation. With this hinge sugar in hand, we were also able to build a metal ion sensor, 1,3-dipyrenylmethyl-hmge sugar. Chelation of the diamino group to the metal ion causes the ring flip of hinge sugar, leading the diequatorial pyrenyl groups into the diaxial orientations. The parallel pyrene groups afford an excimer fluorescence. These findings are important for the construction of molecular machines and molecular devices in the future.

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  • Construction of Molecular Devices

    2001

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    Grant type:Competitive

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  • 分子デバイスの構築

    2001

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  • 糖尿病治療薬を指向した新規グリコシダーゼ阻害剤の開発

    Grant number:11780416  1999 - 2000

    日本学術振興会  科学研究費助成事業  奨励研究(A)

    湯浅 英哉

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    Grant amount:\2300000 ( Direct Cost: \2300000 )

    本研究は、スリランカ産の糖尿病向け生薬から単離され強力なグルコシダーゼ阻害活性を持つサラシノールを大量に供給するための化学合成法の確立を第一の目的とする。また、このサラシノールの構造活性相関を調べるため各種誘導体を合成し、そのグリコシダーゼ阻害活性を測定することを第二の目的とする。サラシノールはチオフラノースの環硫黄原子がアルキルスルホニウムイオンの形でエリスリトールとの間で脱水縮合しており、エリスリトール側鎖上にある硫酸基との間で分子内で塩を形成することにより一種のスピロ環状構造を形成している。この構造をチオフラノースとエリスリトールの環状硫酸エステル誘導体の間の求核置換反応により構築できることを明らかにした。これによりサラシノールの大量供給法を確立するのと同時に立体配置を決定することができた。また、同様の方法で各種誘導体を合成し、これらの各種グリコシダーゼに対する阻害活性を測定することにより、スルホニウムイオン構造とエリスリトール側鎖の構造がともにサラシノールのグルコシダーゼ阻害活性において重要な役割を果たしていることを明らかにした。この結果は、スルホニウムイオン構造をベースにした全く新しいタイプのグリコシダーゼ阻害剤を開発するにあたり非常に重要な情報となる。

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  • 高分子鋳型を用いた人工糖加水分解酵素の構築における基礎的研究

    Grant number:09780523  1997 - 1998

    日本学術振興会  科学研究費助成事業  奨励研究(A)

    湯浅 英哉

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    Grant amount:\2100000 ( Direct Cost: \2100000 )

    本研究は高分子鋳型を用いて人工糖加水分解酵素を構築することを目的とする。天然の糖加水分解酵素は、二つのカルボン酸基を一般酸塩基触媒として用いている場合が多い。そこで、2,4-ジアミノキシロースを還元末端に含む二糖とメタクリル酸で塩を形成させ、これにエチレングリコールジメタクリレートを加えて共重合を行い二糖を除去することにより、糖を結合する溝に二つのカルボン酸を持つ高分子鋳型を合成した。しかし、この共重合体は顕著な糖加水分解活性を示さなかった。人工糖加水分解酵素を構築するにあたっては加水分解酵素阻害剤の阻害機構をさらに詳細に調べることが重要と考えられた。そこでアミノ基を持つ種々のしょ糖誘導体による、αグルコース加水分解移酵素に対する阻害活性を検討した。この結果、アミノ基を1′あるいは3′位に持つ誘導体が顕著な活性を示したことから、1′,3′-ジアミノしよ糖誘導体が誘導物質として期待がもてることが示唆された。現在この化合物の合成を検討中である。高分子鋳型と基質である糖との結合には主に糖が持つ水酸基と高分子鋳型の酸素原子との水素結合が関与してると思われるが、この結合は一般的に弱い。さらに人工糖加水分解酵素の活性を向上させるにあたっては、高分子鋳型と糖との親和性を増加させる必要がある。そこで、糖の疎水面を高分子鋳型により積極的に認識させる目的で、環硫黄疑似糖により芳香環を誘導することを計画し、様々な環硫黄疑似糖の合成を行った。現在、アミノ基を二つ持つ糖をアグリコン部位に持つ環硫黄疑似糖の合成を検討中である。

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  • 糖転移酵素の2基質複合体アナログの合成と機能

    Grant number:09240206  1997

    日本学術振興会  科学研究費助成事業  重点領域研究

    橋本 弘信, 湯浅 英哉

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    Grant amount:\1800000 ( Direct Cost: \1800000 )

    本研究の目的は、糖転移酵素の作用機作を探るべく設計した基質アナログを合成して、それらの糖転移酵素に対する挙動を明かにし、得られた知見をもとに特異的な糖転移酵素阻害剤を創製することにある。具体的には、ガラクトシルトランスフェラーゼ(GalTase)に対し成果の得られた分子設計戦略を適用して、癌化などに関連する糖転移酵素としてよく知られているN-アセチルグルコサミニルトランスフェラーゼ、シアリルトランスフェラーゼ(STase)などに対する特異的阻害剤の開発を目指して、それらに対する2基質、すなわち糖供与体と糖受容体を結合した複合体アナログを合成する。
    本年度は、分子設計の普遍性に関する知見を得るため、GalTaseに対する糖供与体と糖受容体を結合するリンカーの位置の異なる新たな基質複合体アナログ2種の合成を完成した。一方、STaseに対する2基質複合体アナログの設計するためには、その糖供与体のリン酸エステル部分に対する基質認識に関する情報が不可欠である。そこで、ホスホン酸構造を有するCMP-シアル酸のアナログを設計した。新たに、すでに開発済みの手法を用いてシアリルメチルホスホナ-ト型アナログのα-アノマーを、相当するシアル酸のC-アリルグリコシドを出発物質として合成した。シアリルホスホナ-ト型アナログをも合わせて、STaseおよびCMP-シアル酸のトランスポーターに対する挙動を明らかにした。シアリルホスホナ-ト型アナログは、糖供与体となることが、またシアリルメチルホスホナ-ト型アナログはCMP-NeuNAcトランスポーターに対して強い阻害作用を示した。

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  • 糖鎖リガンド複合体アナログの合成

    Grant number:08219210  1996

    日本学術振興会  科学研究費助成事業  重点領域研究

    橋本 弘信, 湯浅 英哉

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    Grant amount:\2100000 ( Direct Cost: \2100000 )

    糖転移酵素における糖転移気候の解明と複合糖質糖鎖の生合成の制御を目的として、糖転移酵素の基質複合体の設計と合成を検討した。すでにガンの転移などに深く関わっているとされるβ-1,4-ガラクトース転移酵素に対して顕著な阻害活性を有する、糖供与体と糖受容体を結合したアナログの合成を達成している。今年度はこの特異的阻害剤設計における汎用性を明らかにするために、両基質の異なった結合様式の2種のアナログを合成した。さらに糖転移酵素の糖供与体部分の新規なアナログを開発するために、5-チオ-アルドースから成る糖転移酵素における糖転移機構の解明と5-チオアルドースから成る糖ヌクレオチド(Leloir)供与体UDP-5-チオ-D-ガラクトサミン1,GDP-5-チオ-L-フコース2,GDP-5-チオ-D-マンノース3などを合成した。1および2はそれぞれラクトアルブミン存在下におけるβ-1,4-ガラクトース転移酵素およびα-1,2-フコース転移酵素により、GlcNAcおよびGalに相当する5-チオ糖残基が転移されることを明らかにし、新しい酵素合成の可能性を切り拓いた。また、シアル酸転移酵素(ST)の供与体であるDMP-アシル酸のホスホン酸構造をもつアナログ数種を合成した。シアリルホスホン酸型アナログはSTに対し阻害は示さないが、転移するという興味ある事実を明らかにし、シアリルメチルホスホン酸型アナログはCMPに匹敵する阻害活性を示すことを見いだした。また、後者のα-アノマーはシアル酸輸送タンパク質を阻害するという新しい知見も得た。

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  • 糖鎖リガンド複合体アナログの合成

    Grant number:07229214  1995 - 1996

    日本学術振興会  科学研究費助成事業  重点領域研究

    橋本 弘信, 湯浅 英哉

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    Grant amount:\2100000 ( Direct Cost: \2100000 )

    生物有機化学的手法で、糖とタンパク質間の分子認識機構を解明する一環として、糖関連酵素の基質アナログおよび糖鎖を認識するタンパク質の人工リガンドの合成を行った。糖転移酵素の1つであるβ-1,4-ガラクトシルトランスフェラーゼ(GalTase)の供与体であるUDP-ガラクトースと受容体であるN-アセチル-β-グルコサミニドをメチレンで架橋した二基質複合体アナログを設計し、その合成を完成した。また、そのものが非常に強いGalTase阻害活性(Ki=1.3μM)を示すという、興味ある事実を見い出した。このことによりGalTaseによる糖転移の際の両基質の空間的配置に関する情報とともに、GalTaseの活性部位を探るための基質アナログを設計するための知見も得られた。
    高次の糖鎖構造認識を検証するプローブとして、血液型関連抗原であるH type2およびLe^X三糖のフコース残基を5-チオフコースに置換した三糖アナログを、共通の合成中間体である1,6-アンヒドロ-2-アジド-2-デオキシ-4-O-(β-ガラクトシル)グルコース誘導体を経由して合成した。剛性したH type2三糖アナログは、H type2三糖を認識するレクチンには認識されず抗体に強く認識されるという、その普遍性に関して今後の検討に興味のもたれる事実を見い出した。

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  • テンプレート効果を利用した位置及び立体選択的グリコシル化法の開発

    Grant number:07780490  1995

    日本学術振興会  科学研究費助成事業  奨励研究(A)

    湯浅 英哉

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    Grant amount:\900000 ( Direct Cost: \900000 )

    生体機能への関与が最近明らかにされたオリゴ糖は医薬品としての重要なターゲットの一つであり、その効率的な合成のためにはグリコシド化反応の位置および立体選択性を同時に制御する新しい手法の開発が強く望まれる。そこで、この新手法として、あらかじめ糖供与体と糖受容体をポリエチレングリコール鎖を介してつなげておいて、アルカリ金属存在下グリコシド化を行う方法を考案した。この方法では、ポリエチレングリコールからクラウンエーテルへの環化をともなうため、グリコシド化反応の選択性が金属イオンによるテンプレート効果により助長されることが期待された。当初、モデル実験として糖供与体であるエチルチオマンノピラノシドの2位水酸基にトリ、テトラ、およびペンタエチレングリコールの末端をエーテル結合させた化合物で、N-ヨードスクシンイミドを用いてもう一方の末端の水酸基の分子内グリコシド化を検討した。この結果、いずれの長さのポリエチレングリコールを用いても、過塩素酸ナトリウム、過塩素酸カリウムなどのアルカリ金属の存在はグリコシド化の収率を低下させることが判った。さらに糖受容体としてマンノースの2位水酸基にポリエチレングリコールを結合させて、3位の水酸基でのグリコシド化を試みたが、金属のあるなしにかかわらずグリコシド化は全く進行しなかった。一般にメチレン鎖をリンカーとしてあらかじめつないだ2糖のグリコシド化では良好な結果が得られているので、リンカー内に酸素原子が存在すると反応を妨害するものと思われる。一方、モデル実験で得られたβ-マンノピラノシド-クラウンエーテル複合体はアミノ酸などを不斉認識する光学活性クラウンエーテルとして期待が持たれるので、今後さらに合成的検討を加える予定である。

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  • Synthesis and Function of Modified Oligosaccharides

    Grant number:06453212  1994 - 1996

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    HASHIMOTO Hironobu, YUASA Hideya

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    Grant amount:\7200000 ( Direct Cost: \7200000 )

    In order to elucidate the reaction machanisms of glucosidases and glycosyltransferases, various oligosaccharide mimics were synthesized and their biochemical behaviors were examined. Di-and trisaccharides having 5-thio-L-fucose residue at the non-reducing end were synthesized and the former analogs were proved to be effective as a linkage-specific inhibitor against alpha-L-fucosidase, while one (H type 2) of the latter analogs showed different behaviors from the natural trisaccharide toward the lectin and antibody. Further, synthetic routes of disaccharides having azasugar at the non-reducing end through amidine linkage were developed. Various glycosyl donor analogs of glycosyltransferases were synthesized. Among them, UDP-5-thio-GalNAc, GDP-5-thio-L-Fuc, and sialyl phosphonate analog of CMP-NeuNAc were found to be active as glycosyl donors, for beta-1,4-galactosyltransferase, alpha-L-fucosyltransferase, and alpha-sialytransferase, respectively.

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  • ガン化に関連する糖転移酵素に対して特異的阻害活性を持つチオ糖の酵素を用いた合成

    Grant number:06740500  1994

    日本学術振興会  科学研究費助成事業  奨励研究(A)

    湯浅 英哉

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    Grant amount:\900000 ( Direct Cost: \900000 )

    癌化に伴って異常に多く発現することが知られている糖転移酵素の一つ、グルコサミニルトランスフェラーゼVを阻害する物質が合成できれば、癌の治療や機構解明に大きく貢献することが期待される。当研究ではこの目標に向ける第一段階として、全く新しいタイプの遷移状態類似体であるイミノチア糖が合成された。この化合物はフラノースの環硫黄原子置換類似体であり、硫黄原子にはトルエンスルホニルイミノ基が付加され、3価となっている。この化合物はプロトンNMRおよび分子モデルより、糖転移反応の遷移状態に構造および電荷分布が似通っていることが示された。また、糖転移酵素阻害剤への応用の指標として行った糖加水分解酵素に対する阻害実験では、この化合物の酵素に対する結合が基質よりも2倍ほど大きいことが示された。温度可変による阻害実験では、この結合にはエンドロピーの寄与がないことが示され、トルエンスルホニル部分が結合の邪魔をしている可能性が示唆された。したがって、さらに阻害活性を向上させるには、トルエンスルホニルイミノ基のうち、特にかさ高いスルホニル部分を除去した化合物が有力であることが示された。また、この化合物の合成途上、環化反応の進行がアノマー効果の有無に依存するという有機化学上の新しい発見がなされた。
    以上のように、本研究では新しいタイプの糖類似体イミノチア糖の効率的合成法および糖転移酵素阻害剤としての可能性が示された。

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  • Development of Functional Oligosaccharide Analogs

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  • 糖認識タンパク阻害剤の合成

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  • 機能性オリゴ糖アナログの開発

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  • Synthesis of the inhibitors for sugar-recognizing proteins

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    Grant type:Competitive

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