• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Research on construction of all-carbon quaternary stereogenic center in fused ring system and asymmetric total synthesis of heterologous bioactive polycyclic compound

Research Project

Project/Area Number 19H02725
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 33020:Synthetic organic chemistry-related
Research InstitutionWaseda University

Principal Investigator

Nakada Masahisa  早稲田大学, 理工学術院, 教授 (50198131)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2021: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2019: ¥8,840,000 (Direct Cost: ¥6,800,000、Indirect Cost: ¥2,040,000)
Keywords全炭素四級不斉中心 / 多環式天然物 / 転位反応 / 不斉全合成 / 立体選択的
Outline of Research at the Start

有用な生物活性多環式化合物の縮環部に多く見られる全炭素四級不斉中心の構築手法創出は挑戦的かつ重要な研究課題であり、生物科学研究・創薬への波及効果も大きい。そこで①パラジウム触媒を用いた分子内環化反応による全炭素四級不斉中心を含むトランス縮環構造の立体選択的構築法、②酸化的脱芳香族化に伴う立体選択的1,n-転位(n=2,3)による全炭素四級不斉中心構築法を開発し、③有用合成中間体の不斉構築法確立と異種多環式天然物(強力ながん細胞増殖阻害活性をもつxerophilusin類、多彩な生物活性を示すkobusine類)の世界初不斉全合成を通じて開発した手法①, ②の有効性を実証する。

Outline of Final Research Achievements

Intramolecular carbothiolation and thiocarbonylation with forming a quaternary asymmetric carbon using palladium catalysts have been developed. We have succeeded in constructing a trans tricyclic compound with an asymmetric quaternary carbon by reductive Heck reaction, carboiodination, and carboborylation. We have found that cis-selective intramolecular arylations of silyl enol ethers using a palladium catalyst.
We succeeded in constructing a quaternary asymmetric carbon by oxidative dearomatization-stereoselective 1,2-rearrangement cascade, and succeeded in synthesizing a compound having the same quaternary asymmetric centers and dimethylmethylene group as ent-kauranoids. It was found that the stereoselective Michael reaction using an asymmetric organocatalyst yielded a product with a yield of 81% and 97% ee.

Academic Significance and Societal Importance of the Research Achievements

優れた生物活性天然物が自然界から得難い場合や生物工学的な供給が困難な場合は、その化学合成による供給が現実的である。最近では天然物の部分構造をもち20の不斉中心を含むHALAVENが完全合成医薬品として生産・供給されている。このように有機合成化学の進歩とともに、複雑な構造をもつ生物活性天然物の合成研究は大学における研究に留まらず、創薬においても重要であり、社会に貢献する研究といえる。多環式化合物の縮環部に多く見られる第四級不斉炭素の構築は有機合成化学上重要である。よって、この問題を解決する手法の創出は学術的意義があり、構造活性相関研究および生物科学研究、さらには創薬への波及効果も大きいといえる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (11 results)

All 2022 2021 2020 2019 Other

All Journal Article (6 results) (of which Peer Reviewed: 6 results) Presentation (3 results) Remarks (2 results)

  • [Journal Article] Palladium-Catalyzed Thiocarbonylations with Triisopropylsilyl Thioethers2022

    • Author(s)
      Nakada Masahisa、Hosoya Yosuke、Mizoguchi Kota、Yasukochi Honoka
    • Journal Title

      Synlett

      Volume: 33 Issue: 05 Pages: 495-501

    • DOI

      10.1055/a-1733-6073

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Preparation of 2,3-Dihydrobenzo[b]thiophene Bearing Benzylic Quaternary Carbon by Palladium-Catalyzed Cascade Reaction2022

    • Author(s)
      Nakada Masahisa、Hosoya Yosuke、Yasukochi Honoka、Mizoguchi Kota
    • Journal Title

      HETEROCYCLES

      Volume: 104 Issue: 4 Pages: 655-666

    • DOI

      10.3987/com-21-14611

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Construction of Successive Stereogenic Centers of ent-Kauranoid via Oxidative Dearomatization/1,2-Shift Cascade2022

    • Author(s)
      Imamura Yuki、Mizutani Hikaru、Nakada Masahisa
    • Journal Title

      Synlett

      Volume: 33 Issue: 15 Pages: 00-00

    • DOI

      10.1055/a-1855-3777

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Research on the Efficient Enantioselective Total Synthesis of Useful Bioactive Polycyclic Compounds2022

    • Author(s)
      Nakada Masahisa
    • Journal Title

      Bulletin of the Chemical Society of Japan

      Volume: 95 Issue: 7 Pages: 00-00

    • DOI

      10.1246/bcsj.20210329

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Palladium-Catalyzed Carbothiolation via Trapping of the σ-Alkyl Palladium Intermediate with RSTIPS2019

    • Author(s)
      Hosoya Yosuke、Kobayashi Ikumi、Mizoguchi Kota、Nakada Masahisa
    • Journal Title

      Organic Letters

      Volume: 21 Issue: 20 Pages: 8280-8284

    • DOI

      10.1021/acs.orglett.9b03046

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Preparation of a Chiral Building Block by an Organocatalytic Asymmetric Intramolecular Michael Reaction2019

    • Author(s)
      Sato, Y.; Hosoya,Y.; Kobayashi, I.; Adachi, K.; Nakada, M.
    • Journal Title

      Asian J. Org. Chem.

      Volume: 8 Issue: 7 Pages: 1033-1036

    • DOI

      10.1002/ajoc.201900178

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] σ-アルキルパラジウムを中間体とした触媒的カルボチオレーション2021

    • Author(s)
      細谷 洋介・小林 育美・溝口 滉太・中田 雅久
    • Organizer
      日本化学会第101回春季年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] σ-アルキルパラジウムを中間体とした触媒的カルボチオレーション2020

    • Author(s)
      細谷 洋介・小林 育美・溝口 滉太・中田 雅久
    • Organizer
      日本化学会第100回春季年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Highly Enantio- and Stereoselective Construction of ent-Atisane Scaffold via Organocatalytic Asymmetric Intramolecular Michael Reaction and [4+2] Cycloaddition2019

    • Author(s)
      Hiroko Sekita, Yusuke Sato, Ikumi Kobayashi, Yosuke Hosoya, Kyohei Adachi, Ippei Kobayashi and Masahisa Nakada
    • Organizer
      27th International Society of Heterocyclic Chemistry Congress
    • Related Report
      2019 Annual Research Report
  • [Remarks] 中田雅久研究室

    • URL

      http://www.chem.waseda.ac.jp/nakada/

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report 2019 Annual Research Report
  • [Remarks] 早稲田大学 先進理工学部 化学・生命化学科

    • URL

      http://www.chem.waseda.ac.jp/ja/

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report 2019 Annual Research Report

URL: 

Published: 2019-04-18   Modified: 2023-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi