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Study on total synthesis, stereochemical assignment, and biological assessment of amphidinolide N and its epimers

Research Project

Project/Area Number 20K15270
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 33020:Synthetic organic chemistry-related
Research InstitutionTohoku University

Principal Investigator

Umemiya Shigenobu  東北大学, 理学研究科, 助教 (10802754)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywordsマクロリド / 有機触媒 / 不斉アルドール反応 / 構造決定 / 天然物 / 全合成 / 不斉触媒反応 / 生物活性
Outline of Research at the Start

amphidinolide Nと呼ばれる天然有機化合物は、ヒト扁平上皮癌細胞に対して極めて強力な活性を有している。これまでに知られている中で最強の抗腫瘍活性があることから、新規抗がん剤のリード化合物として世界的に注目されている。しかし、現在では天然から入手が不可能であり、その真の立体構造と活性部位・活性発現機構は未解明のままである。本研究では有機合成により化合物の供給を行い、その強力な抗腫瘍活性の発現機構解明を目的とする。

Outline of Final Research Achievements

The applicant has improved the synthetic route of the C7 epimer of amphidinolide N. An important intermediate C1-C13 fragment were successfully synthesized on a decagram scale via the present route. This synthetic route was also able to synthesize not only the C7 epimer but also the C10 epimer divergently. Namely, four isomers were successfully prepared on the gram scale by our synthetic strategy. The C7 epimer of amphidinolide N, which had already been synthesized and structurally determined by our group, was investigated for its biological activity in collaboration with Prof. Kubota, in Showa Pharmaceutical University. As a result, it was found that the C7 epimer exhibited IC50=6 μg/mL against KB cells and IC50=2.8 μg/mL against L1210 cells.

Academic Significance and Societal Importance of the Research Achievements

これまでamphidinolide Nは強力な生物活性を有している事が知られていたが、実際にその全体構造を合成し、活性評価をした例はなかった。今回初めて全体構造を有する化合物の活性評価を行う事に成功し、オリジナルと比べて弱いものの抗腫瘍活性を持つことを明らかとした。これにより、本化合物の立体が活性に与える影響が極めて大きい事が示唆された。本研究を通し、amphidinolide Nのような複雑なマクロリドを大量供給する手法が確立されたとともに、その生物活性試験を実施できたことは、有機合成化学のみならず、天然物化学や医学・生物学への波及効果があったとみなすことができる。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (6 results)

All 2023 2022 2021

All Journal Article (5 results) (of which Peer Reviewed: 4 results) Presentation (1 results)

  • [Journal Article] Scalable Total Synthesis of Leucascandrolide A Macrolactone Using a Chiral Phosphoric Acid/CuX Combined Catalytic System2023

    • Author(s)
      Umemiya Shigenobu、Shinagawa Naoya、Terada Masahiro
    • Journal Title

      Organic Letters

      Volume: 25 Issue: 11 Pages: 1924-1928

    • DOI

      10.1021/acs.orglett.3c00450

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Chiral Bronsted Acid Catalyzed Enantioconvergent Synthesis of Chiral Tetrahydrocarbazoles with Allenylsilanes from Racemic Indolylmethanols2022

    • Author(s)
      Umemiya Shigenobu、Lingqi Kong、Eto Yuno、Terada Masahiro
    • Journal Title

      Chemistry Letters

      Volume: 51 Issue: 4 Pages: 391-394

    • DOI

      10.1246/cl.210803

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Kinetic resolution of racemic tertiary allylic alcohols through SN2′ reaction using a chiral bisphosphoric acid/silver salt co-catalyst system2022

    • Author(s)
      Kayal Satavisha、Kikuchi Jun、Shinagawa Naoya、Umemiya Shigenobu、Terada Masahiro
    • Journal Title

      Chemical Science

      Volume: 13 Issue: 33 Pages: 9607-9613

    • DOI

      10.1039/d2sc03052g

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Development of chiral bisphosphoric acid/boronic acid co-catalyst system for enantioselective SN2’ reaction2021

    • Author(s)
      Kayal Satavisha、Kikuchi Jun、Shinagawa Naoya、Umemiya Shigenobu、Terada Masahiro
    • Journal Title

      Tetrahedron

      Volume: 98 Pages: 132412-132412

    • DOI

      10.1016/j.tet.2021.132412

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Catalytic Enantioselective Allylation of Acetylenic Aldehydes by Chiral Phosphoric Acid/Transition Metal Cooperative Catalysis: Formal Synthesis of Fostriecin2021

    • Author(s)
      Umemiya Shigenobu、Terada Masahiro
    • Journal Title

      Organic Letters

      Volume: 23 Issue: 9 Pages: 3767-3771

    • DOI

      10.1021/acs.orglett.1c01166

    • Related Report
      2021 Research-status Report
  • [Presentation] キラルリン酸触媒を用いたLeucascandrolide Amacrolactone の効率的全合成2023

    • Author(s)
      品川 尚弥 、梅宮 茂伸 、寺田 眞浩
    • Organizer
      日本化学会第103春季年会
    • Related Report
      2022 Annual Research Report

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Published: 2020-04-28   Modified: 2024-01-30  

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