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2015 Fiscal Year Research-status Report

(+)-ascospiroketal A,B の全合成および絶対配置の決定

Research Project

Project/Area Number 26460028
Research InstitutionTokushima Bunri University

Principal Investigator

江角 朋之  徳島文理大学, 薬学部, 准教授 (50315264)

Project Period (FY) 2014-04-01 – 2017-03-31
Keywordsascospiroketal / 結核 / 不斉1,4-付加 / 不斉アルドール / β-ラクトン / 連続不斉中心 / 不斉四級炭素 / 天然物合成
Outline of Annual Research Achievements

isopropenyloxazolidinone と acetoaldehyde とのアルドール反応により生じるアルドール生成物(1:1ジアステレオマー混合物)を J. M. J. Williams らの速度論的酵素反応を利用して分離し,(+)-ascospiroketal B の 2-methyl-3-hydroxybutanoic acid 部分をエナンチオ選択的に合成した.また,キラルな 1,3-propanediol から出発し,10~18位に相当する部分を (10Z)-alkenyliodide として得た.1~9位に相当する部分は chiraloxazolidinone を不斉補助基とする 1,4-付加反応により,2位の tetraalkyl (all-carbon) 不斉四級炭素を構築したのち,3-alkyloxypropanal と塩基性条件下で aldol 反応させ,β-ラクトンへと変換し,3,4位の不斉の導入に成功した.

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

計画が妥当であったため.

Strategy for Future Research Activity

1~9位に相当する部分をモデルを使った時と同様な方法で合成を進め,10~18位部分とパラジウム(0)触媒によるカップリングを行ったのち,3-hydroxy-2-methylbutanoic acid 部分と縮合させて全合成を完成する予定である.

Causes of Carryover

当初予定していた不斉反応を次年度に行うことにしたため,必要な試薬も次年度に購入することになったため.

Expenditure Plan for Carryover Budget

本研究最終年度に当たるため,研究目標達成に向け主に試薬などの消耗品の購入,学会発表のための旅費などで全額使い切る予定である.

  • Research Products

    (9 results)

All 2016 2015

All Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results,  Open Access: 2 results,  Acknowledgement Compliant: 3 results) Presentation (6 results) (of which Int'l Joint Research: 4 results)

  • [Journal Article] Bakuchiol Is a Phenolic Isoprenoid with Novel Enantiomer-​selective Anti-​influenza A Virus Activity Involving Nrf2 Activation2015

    • Author(s)
      Shoji, Masaki; Arakaki, Yumie; Esumi, Tomoyuki; Kohnomi, Shuntaro; Yamamoto, Chihiro; Suzuki, Yutaka; Takahashi, Etsuhisa; Konishi, Shiro; Kido, Hiroshi; Kuzuhara, Takashi
    • Journal Title

      Journal of Biological Chemistry

      Volume: 290 Pages: 28001-28017

    • DOI

      10.1074/jbc.M115.669465

    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Synthetic studies of neurite outgrowth-​promoting neovibsanins2015

    • Author(s)
      Imagawa, Hiroshi; Esumi, Tomoyuki; Fukuyama, Yoshiyasu
    • Journal Title

      Yuki Gosei Kagaku Kyokaishi

      Volume: 73 Pages: 902-910

    • DOI

      10.1016/B978-0-444-63430-6.00002-3

    • Acknowledgement Compliant
  • [Journal Article] Systematic Asymmetric Synthesis of All Diastereomers of (-​)​-​Talaumidin and Their Neurotrophic Activity2015

    • Author(s)
      Harada, Kenichi; Kubo, Miwa; Horiuchi, Hiroki; Ishii, Akiko; Esumi, Tomoyuki; Hioki, Hideaki; Fukuyama, Yoshiyasu
    • Journal Title

      Journal of Organic Chemistry

      Volume: 80 Pages: 7076-7088

    • DOI

      10.1021/acs.joc.5b00945

    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] 神経栄養因子様活性天然物,ネオビブサニン類のエナンチオ選択的合成研究2016

    • Author(s)
      新居建生
    • Organizer
      日本薬学会第136年会
    • Place of Presentation
      神奈川県横浜市
    • Year and Date
      2016-03-26 – 2016-03-29
  • [Presentation] ビオチン標識化バクチオール誘導体の合成と抗インフルエンザウイルス活性評価2016

    • Author(s)
      渡辺珠汎
    • Organizer
      日本薬学会第136年会
    • Place of Presentation
      神奈川県横浜市
    • Year and Date
      2016-03-26 – 2016-03-29
  • [Presentation] Enantioselective synthetic study of (+)-neovibsanins A and B2015

    • Author(s)
      江角朋之
    • Organizer
      Inaugural Symposium of the Phytochemical Society of Asia 2015
    • Place of Presentation
      Tokushima, Japan
    • Year and Date
      2015-08-30 – 2015-09-02
    • Int'l Joint Research
  • [Presentation] Evalution of talaumidin derivatives on neurite-outgrowth in NGF-differentisted PC12 cells2015

    • Author(s)
      座波
    • Organizer
      Inaugural Symposium of the Phytochemical Society of Asia 2015
    • Place of Presentation
      Tokushima, Japan
    • Year and Date
      2015-08-30 – 2015-09-02
    • Int'l Joint Research
  • [Presentation] Bakuchiol, a phenolic isoprenoid, has enantiomer-selective ant-influenza A.2015

    • Author(s)
      庄司正樹
    • Organizer
      Inaugural Symposium of the Phytochemical Society of Asia 2015
    • Place of Presentation
      Tokushima, Japan
    • Year and Date
      2015-08-30 – 2015-09-02
    • Int'l Joint Research
  • [Presentation] Enantioselective Synthetic Study of (+)-Neovibsanins A and B2015

    • Author(s)
      江角朋之
    • Organizer
      24th International Symposium: Synthesis in Organic Chemistry
    • Place of Presentation
      Cambridge, UK
    • Year and Date
      2015-07-20 – 2015-07-23
    • Int'l Joint Research

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Published: 2017-01-06  

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