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Mechanistic Study on New-Type of Catalytic Enantiomeric Amplification

Research Project

Project/Area Number 20K21191
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 33:Organic chemistry and related fields
Research InstitutionNagoya University

Principal Investigator

Masato Kitamura  名古屋大学, 創薬科学研究科, 教授 (50169885)

Project Period (FY) 2020-07-30 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2022: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2021: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords不斉増幅現象 / 銅錯体 / Friedel-Crafts反応 / 相分離 / 不斉触媒反応 / キラル二座配位子
Outline of Research at the Start

申請者らの新規光学活性ビスアミジン配位子の銅2価錯体は,Friedel-Crafts反応において,従来にない高い触媒性能を示す.反応機構解明の過程で,相分離を伴う反応条件で強力な不斉増幅現象が発現することを見出した.これまでの関連研究では、いずれもヘテロキラル2量体とホモキラル2量体の安定性の相違によって説明されるNoyori機構、あるいはヘテロキラル1:2錯体とホモキラル1:2錯体の安定性の相違によって説明されるKagan機構によって理解されてきた.本反応系では,触媒濃度が濃いとNoyori機構が働き,薄いと全く新しい機構が働くことが明らかになってきた.本研究ではこの機構の全貌を解明する.

Outline of Final Research Achievements

A Copper(II) complex of chiral bisamidine ligand which we have developed exihibits unprecedented high catalytic performance toward Friedel-Crafts reaction. In the course of mechanistic investigation, we have found that this reaction arises strong chiral amplification with phase separation. In general, the origin of this phenomena is explained by Noyori mechanism which is difference of stability between homochiral dimer and heterochiral dimer, or Kagan mechanism which is difference of stability between homochiral complex and heterochiral complex. In this study, to the current reaction, we have revealed that the Noyori mechanism is involved when the catalyst concentration is high, whereas a new mechanism involved when the catalyst concentration is low.

Academic Significance and Societal Importance of the Research Achievements

不斉増幅現象は、偏りがわずかなエナンチオマー混合物を用いて、より光学純度の高いキラル化合物を合成することができる。そのため、不斉合成において魅力的な手法となりうる。しかし、その発現条件は特異であるため、いかにしてこの現象が発現するかを明確にすることは反応設計に重要な知見を与える。さらに、自然界のホモキラリティーの起源を知る上でも重要である。本研究成果は、1)条件によってその発現メカニズムが異なること、2)一つは従来の解釈とは異なるメカニズムが関与していること、を実験的に証明したものであり、学術的、社会的いずれの観点からも意義がある。

Report

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

    (10 results)

All 2022 2021 2020 Other

All Journal Article (9 results) (of which Peer Reviewed: 9 results,  Open Access: 2 results) Remarks (1 results)

  • [Journal Article] Asymmetric Dehydrative Cyclization of Allyl Alcohol to Cyclic Ether Using Chiral Br?nsted Acid/CpRu(II) Hybrid Catalysts: A DFT Study of the Origin of Enantioselectivity2022

    • Author(s)
      Ratanasak Manussada、Tanaka Shinji、Kitamura Masato、Hasegawa Jun-ya
    • Journal Title

      The Journal of Organic Chemistry

      Volume: 87 Issue: 19 Pages: 13062-13072

    • DOI

      10.1021/acs.joc.2c01576

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Stereodivergent dehydrative allylation of β-keto esters using a Ru/Pd synergistic catalyst2022

    • Author(s)
      Le Thien Phuc、Tanaka Shinji、Yoshimura Masahiro、Sato Kazuhiko、Kitamura Masato
    • Journal Title

      Nature Communications

      Volume: 13 Issue: 1 Pages: 5876-5876

    • DOI

      10.1038/s41467-022-33432-4

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Ruthenium-Catalyzed Asymmetric Dehydrative Allylic Cyclization of Five-Membered Chalcogen Heteroaromatics2021

    • Author(s)
      Tanaka, S.; Iwase, S.; Kanda, S.; Kato, M.; Kiriyama, Y.; Kitamura, M.
    • Journal Title

      Synlett

      Volume: 53 Issue: 17 Pages: 3121-3125

    • DOI

      10.1055/a-1523-6826

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Systematic asymmetric analog synthesis of fluspidine, a σ1 receptor ligand, to improve ligand affinity2021

    • Author(s)
      Tanaka, S.; Yoshinaka, S.; Kawamura, K.; Morita, M.; Kitamura, M.
    • Journal Title

      Tetrahedron Letters

      Volume: 85 Pages: 153250-153250

    • DOI

      10.1016/j.tetlet.2021.153250

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Asymmetric Dehydrative Allylation Using Soft Ruthenium and Hard Bronsted Acid Combined Catalyst2021

    • Author(s)
      Tanaka, S.; Kitamura, M.
    • Journal Title

      Chemical Record

      Volume: 21 Issue: 6 Pages: 1385-1397

    • DOI

      10.1002/tcr.202000157

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] A Monocationic Zn(II) Acetate Complex of a Chiral Bisamidine Dioxolane Ligand, Naph-diPIM-dioxo-R, for the Asymmetric 1,3-Dipolar Cycloaddition of Tridentate α-Substituted α-Imino Esters and Acrylates to Multi-Substituted Prolines: Importance of an n-π* Interaction for High Enantioselectivity2021

    • Author(s)
      Kiran Indukuru Naga Chaithanya、Fujita Kazuki、Kobayashi Kazuki、Tanaka Shinji、Kitamura Masato
    • Journal Title

      Bulletin of the Chemical Society of Japan

      Volume: 94 Issue: 1 Pages: 295-308

    • DOI

      10.1246/bcsj.20200266

    • NAID

      130007968776

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Mechanism of the Asymmetric Dehydrative Allylative Cyclization of Alcohols to Cyclic Ethers Catalyzed by a CpRu Complex of the Chiral Picolinic Acid-Type Ligand, Cl-Naph-PyCOOH: Is a π-Allyl Intermediate Present?2021

    • Author(s)
      Suzuki Yusuke、Iwase Shoutaro、Ratanasak Manussada、Hasegawa Jun-ya、Tanaka Shinji、Kitamura Masato
    • Journal Title

      Bulletin of the Chemical Society of Japan

      Volume: 94 Issue: 2 Pages: 440-450

    • DOI

      10.1246/bcsj.20200228

    • NAID

      130007995431

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Mechanism Change of (+)-Nonlinear Effect in a Phase Separation System in a CuII-Catalyzed Asymmetric Friedel-Crafts Reaction Using a C2-Chiral Dioxolane-Containing-Bisamidine Ligand, Naph-diPIM-dioxo-iPr2020

    • Author(s)
      Le Thien Phuc、Tanaka Shinji、Yoshimura Masahiro、Kitamura Masato
    • Journal Title

      Bulletin of the Chemical Society of Japan

      Volume: 93 Issue: 11 Pages: 1319-1333

    • DOI

      10.1246/bcsj.20200172

    • NAID

      130007939768

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Asymmetric Synthesis of Multi‐substituted Prolines via a Catalytic 1,3‐Dipolar Cycloaddition Using a Monocationic Zn II OAc Complex of a Chiral Bisamidine Ligand, Naph‐diPIM‐dioxo‐R2020

    • Author(s)
      Chaithanya Kiran I. N.、Fujita Kazuki、Tanaka Shinji、Kitamura Masato
    • Journal Title

      ChemCatChem

      Volume: 12 Issue: 22 Pages: 5613-5617

    • DOI

      10.1002/cctc.202001202

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Remarks] 産総研などが複雑な光学異性体化合物の新合成法、創薬研究加速へ

    • URL

      https://xtech.nikkei.com/atcl/nxt/column/18/02122/00099/

    • Related Report
      2022 Annual Research Report

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Published: 2020-08-03   Modified: 2024-01-30  

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