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Total synthesis of cycloartane-type triterpenoids

Research Project

Project/Area Number 21H02131
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 38040:Bioorganic chemistry-related
Research InstitutionKyoto University

Principal Investigator

Tsukano Chihiro  京都大学, 農学研究科, 准教授 (70524255)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2023: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2022: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2021: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Keywords合成化学 / 生物有機化学 / 有機化学 / 全合成 / 生理活性 / 構造活性相関 / 生物活性
Outline of Research at the Start

本研究では, 伝統的な機能性食品や生薬に由来する複雑縮環トリテルペノイドを取り上げる. これらは, 多様な生物活性を有しているが, 活性発現に重要な構造要因は未解明である. また, 多数の官能基や不安定な構造を有し, チャレンジングな合成標的である. 申請者は, 独自のドミノ反応を基盤とした合成戦略により, これらのテルペノイドの収束的・網羅的全合成を展開する. さらに全合成経路を基盤として, 抗HIV活性等の抗ウイルス活性を指標にした構造-活性相関研究を展開し, 活性発現に必要な構造因子の解明と単純化機能性トリテルペノイドの創製を目指す.

Outline of Final Research Achievements

Pre-schisanartanin A and lancilactone C are triterpenoids, isolated from Schisandra chinensis and Kadsura lancilimba, respectively, which exhibit broad-spectrum antiviral activity, but their cytotoxicity is very weak, making them valuable as pharmaceutical seed compounds. In this study, we developed an efficient synthetic strategy for cycloartane skeletons based on a domino [4+3] cycloaddition involving cleavage of a three-membered ring. By developing this synthetic strategy, we succeeded in constructing the characteristic 7-membered triene structure of lancilactone C (proposed structure) and achieved its total synthesis. Based on NMR data and proposed biosynthesis of lancilactone C, the proposed structure was revised, and its revised structure was elucidated by further synthesis. Additionally, the left and right fragments of pre-schisanartanin A containing an all cis-substituted propane were also synthesized.

Academic Significance and Societal Importance of the Research Achievements

現在、複雑な構造を有するトリテルペノイドは、天然物合成研究の最先端にあり、新しい合成戦略と新規生物活性物質の創出の場となっている。本研究においても、ドミノ[4+3]環化付加反応を開発した点や、特異な置換パターンを有する三員環を含む構造の新規合成法を確立した点で、学術的意義はきわめて大きい。本合成法の創出は、シクロアルタン型トリテルペノイドlancilactone Cの世界初の全合成と真の構造解明につながり、これにより自然界からごく微量しか得られない複雑かつ新奇なトリテルペノイドの確実な供給法を確立したことに加えて、多置換3員環や不飽和7員環をもつ生理活性物質を合成するための新しい指針を得た。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (26 results)

All 2024 2023 2022 2021 Other

All Journal Article (7 results) (of which Peer Reviewed: 7 results) Presentation (13 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results) Remarks (6 results)

  • [Journal Article] Toward the Total Synthesis of Schinortriterpenoids: Construction of the All-cis-Substituted Cyclopropane Unit2024

    • Author(s)
      Ryotaro Yagita, Kazuhiro Irie and Chihiro Tsukano
    • Journal Title

      Synlett

      Volume: 35 Issue: 04 Pages: 423-426

    • DOI

      10.1055/a-2102-8014

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Total Synthesis and Structure Revision of (+)-Lancilactone C2023

    • Author(s)
      Kuroiwa Hidetaka、Suzuki Soichiro、Irie Kazuhiro、Tsukano Chihiro
    • Journal Title

      Journal of the American Chemical Society

      Volume: 145 Issue: 27 Pages: 14587-14591

    • DOI

      10.1021/jacs.3c04124

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 歪んだ3員環を含む生物活性天然物の全合成2023

    • Author(s)
      塚野千尋
    • Journal Title

      化学と生物

      Volume: 61 Pages: 288-295

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Total Synthesis of Lyconesidine B: Approach to a Three-Dimensional Tetracyclic Skeleton of Amine-Type Fawcettimine Core and Studies of Asymmetric Synthesis2022

    • Author(s)
      Kurose Tomohiro、Itoga Moeko、Nanjo Takeshi、Takemoto Yoshiji、Tsukano Chihiro
    • Journal Title

      Bulletin of the Chemical Society of Japan

      Volume: 95 Issue: 6 Pages: 871-881

    • DOI

      10.1246/bcsj.20220049

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Total Synthesis of Nitrogen‐Containing Natural Products Based on Palladium‐Catalyzed C-H Functionalization2022

    • Author(s)
      Tsukano Chihiro、Takemoto Yoshiji
    • Journal Title

      Handbook of CH-Functionalization

      Volume: - Pages: 1-49

    • DOI

      10.1002/9783527834242.chf0185

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Studies Toward the Total Synthesis of Schinortriterpenoids: Diastereoselective Synthesis of the Left‐Hand Fragment2021

    • Author(s)
      Yagita Ryotaro、Irie Kazuhiro、Tsukano Chihiro
    • Journal Title

      European Journal of Organic Chemistry

      Volume: 2021 Issue: 30 Pages: 4269-4272

    • DOI

      10.1002/ejoc.202100510

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Asymmetric Total Synthesis of Shagenes A and B2021

    • Author(s)
      Tsukano Chihiro、Yagita Ryotaro、Heike Takayoshi、Mohammed Tagwa A.、Nishibayashi Kazuya、Irie Kazuhiro、Takemoto Yoshiji
    • Journal Title

      Angewandte Chemie International Edition

      Volume: 60 Issue: 43 Pages: 23106-23111

    • DOI

      10.1002/anie.202109786

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] リーシュマニア症の原因寄生虫に効果のある天然物の全合成:歪みのある三員環の構築と応用2024

    • Author(s)
      塚野千尋
    • Organizer
      有機合成2月セミナー「有機合成のニュートレンド2024」
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Total Synthesis and Structure Revision of (+)-Lancilactone C2023

    • Author(s)
      Chihiro Tsukano; Hidetaka Kuroiwa; Soichiro Suzuki; Kazuhiro Irie
    • Organizer
      IKCOC-15
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 朝鮮五味子由来トリテルペノイド pre-schisanartanin A の全合成研究2023

    • Author(s)
      八木田凌太郎; 入江一浩; 塚野千尋
    • Organizer
      第49回反応と合成の進歩シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] 抗リーシュマニア・セスキテルペン・shagene類の不斉全合成および類縁体の合成2023

    • Author(s)
      伊藤響; 鈴江一友; 入江一浩; 塚野千尋
    • Organizer
      第52回複素環化学討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] サネカズラ属生薬植物由来の抗 HIV トリテルペノイド・ Lancilactone C の合成化学的構造改訂2023

    • Author(s)
      鈴木 総一郎, 黒岩 秀崇, 入江 一浩, 塚野 千尋
    • Organizer
      日本農芸化学会 広島大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 抗リーシュマニア・セスキテルペンshagene類の天然型 エナンチオマーの不斉全合成および生物活性評価2023

    • Author(s)
      伊藤 響, 入江 一浩, 塚野 千尋, 鈴江 一友
    • Organizer
      日本農芸化学会 広島大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 抗 HIV 活性トリテルペノイド・ランシラクトンC の 不斉全合成と構造改訂2022

    • Author(s)
      塚野 千尋, 黒岩 秀崇, 鈴木 総一郎, 入江 一浩
    • Organizer
      第64回天然有機化合物討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Asymmetric Total Synthesis of Shagenes A and B, Anti-Leishmanial Sesquiterpene2022

    • Author(s)
      Chihiro Tsukano
    • Organizer
      SICC-11
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 抗 HIV 活性トリテルペノイド・ランシラクトンC の 不斉全合成と構造改訂2022

    • Author(s)
      塚野 千尋
    • Organizer
      生理化学研究ユニット 第12回シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] サネカズラ属生薬植物由来の抗HIV活性トリテルペノイド・Lancilactone Cの不斉全合成研究2022

    • Author(s)
      黒岩秀崇、入江一浩、塚野千尋
    • Organizer
      日本農芸化学会関西支部第519回講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Pre-schisanartanin Aの右側フラグメント合成2022

    • Author(s)
      八木田凌太郎、入江一浩、塚野千尋
    • Organizer
      日本農芸化学会2022年度大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 三環性セスキテルペン Shagene A および B の不斉全合成2021

    • Author(s)
      塚野千尋、八木田凌太郎、平家崇吉、Tagwa A. Mohammed、西林和也、入江一浩、竹本佳司
    • Organizer
      第63回天然有機化合物討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 抗HIV活性トリテルペノイド・ランシラクトンCの合成研究:連続不斉中心の立体選択的構築2021

    • Author(s)
      黒岩秀崇、入江一浩、塚野千尋
    • Organizer
      第41回有機合成若手セミナー 明日の有機合成を担う人のために
    • Related Report
      2021 Annual Research Report
  • [Remarks] 京都大学 教育研究活動データベース

    • URL

      https://kdb.iimc.kyoto-u.ac.jp/profile_private/ja.51b3fdc113fec740.html

    • Related Report
      2023 Annual Research Report
  • [Remarks] ORCID

    • URL

      https://orcid.org/0000-0002-9361-0857

    • Related Report
      2023 Annual Research Report
  • [Remarks] researchmap

    • URL

      https://researchmap.jp/tsukano_chihiro

    • Related Report
      2023 Annual Research Report
  • [Remarks] 京都大学 教育研究活動データベース

    • URL

      http://kyouindb.iimc.kyoto-u.ac.jp/j/rK9xV

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
  • [Remarks] ORCID ID

    • URL

      https://orcid.org/0000-0002-9361-0857

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
  • [Remarks] researchmap URL

    • URL

      https://researchmap.jp/tsukano_chihiro

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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