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

Noncovalent immobilization of chiral Lewis acid catalysts on pi-electron materials

Research Project

Project/Area Number 20K15272
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Kitanosono Taku  東京大学, 大学院理学系研究科(理学部), 助教 (50755981)

Project Period (FY) 2020-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywordsπ電子材料 / Lewis酸 / 水中反応 / 不斉反応場 / 不均一系触媒
Outline of Research at the Start

本研究課題ではLewis塩基点を持たないCNTを活用し、CNTへの強い物理吸着能を活用することで高活性な水和キラルLewis酸点を疎水的且つ濡れ性を帯びたCNT表面上に担持させ、困難な活性・不斉環境の維持と回収・再使用性との両立を狙う。まずこれまでに例のないキラルスカンジウム触媒の回収・再使用を、漏出を抑制することが最も困難な水中反応にて、不斉配位子を担持することなく達成することで触媒の頑強性を示し、水中でも使用可能な、頑強で高活性な不斉Lewis酸触媒のための一般手法の確立を目指す。

Outline of Final Research Achievements

We were keen to rely on organic reactions using water as a reaction medium to achieve non-covalent immobilization of chiral Lewis acid catalysts; It was envisioned that embedding highly active hydrated chiral Lewis acid into hydrophobic surfaces would result in keeping its activity and asymmetric environments, regardless of chemical modification of asymmetric ligands. As a result, chiral catalysts supported on polyanionic polymers or carbon nanotubes (CNTs) was found to provide good enantioselectivity. In the former catalysis, water-insoluble components are self-organized by simple stirring in water without plasma treatment or mechanochemical techniques. Both catalysts developed in this project showed good catalytic activity not in organic solvents or under solvent-free conditions, but in water.

Academic Significance and Societal Importance of the Research Achievements

化学資源の枯渇や化学系廃棄物に対する懸念、またカーボンニュートラル社会に向けた取り組みを背景として、有機化学の分野では、合成手法の合理化による環境負荷の低減が強く求められている。キラルLewis酸は、医薬品や化成品などの迅速合成を可能にする触媒的不斉合成に広く用いられているが、その回収・再使用を可能にするための固定化(不溶化)技術には、活性や不斉環境を維持と金属や配位子の漏出抑制との両立という根本的な課題があった。本研究課題では、煩雑な合成を要する不斉配位子の化学修飾に依らず、活性な金属錯体を固定化する手法について、様々なアプローチから研究を行い、水中特異的な興味深い知見が多数得られた。

Report

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

    (10 results)

All 2022 2021 2020

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

  • [Journal Article] Water-driven solid self-assembled catalysis2022

    • Author(s)
      T. Kitanosono, T. Hisada, Y. Yamashita, S. Kobayashi
    • Journal Title

      J. Organomet. Chem.

      Volume: 965-966 Pages: 122318-122318

    • DOI

      10.1016/j.jorganchem.2022.122318

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Zeolite Catalysis Enables Efficient Pyrazinone Synthesis in Water2021

    • Author(s)
      T. Hisada, T. Kitanosono, Y. Yamashita, S. Kobayashi
    • Journal Title

      Bull. Chem. Soc. Jpn.

      Volume: 94 Issue: 6 Pages: 1757-1759

    • DOI

      10.1246/bcsj.20210112

    • NAID

      130008066573

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Synthetic Organic “Aquachemistry” that Relies on Neither Cosolvents nor Surfactants2021

    • Author(s)
      Kitanosono Taku, Kobayashi Shu
    • Journal Title

      ACS Cent. Sci.

      Volume: - Issue: 15 Pages: 5598-5605

    • DOI

      10.1021/jacs.0c13317

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Hydrogen‐Bonding‐Assisted Cationic Aqua Palladium(II) Complex Enables Highly Efficient Asymmetric Reactions in Water2020

    • Author(s)
      Kitanosono Taku, Hisada Tomoya, Yamashita Yasuhiro, Kobayashi Shu
    • Journal Title

      Angew. Chem. Int. Ed.

      Volume: 60 Issue: 7 Pages: 3407-3411

    • DOI

      10.1002/anie.202009989

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Reactions in Water Involving the “On‐Water” Mechanism2020

    • Author(s)
      Kitanosono Taku、Kobayashi Shu
    • Journal Title

      Chem. Eur. J.

      Volume: - Issue: 43 Pages: 9408-9429

    • DOI

      10.1002/chem.201905482

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] Development of Chiral Lewis Acid Complexes with High Hydrophobicity as Self-healing Catalysts for Reactions in Water2022

    • Author(s)
      F. Lu, T. Kitanosono, Y. Yamashita, S. Kobayashi
    • Organizer
      日本化学会第102春季年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 芳香環修飾を施した単層カーボンナノチューブを用いる固定化キラルスカンジウム触媒の開発2022

    • Author(s)
      S. Tanaka, T. Kitanosono, Y. Yamashita, S. Kobayashi
    • Organizer
      日本化学会第102春季年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 新規キラル2,2'-ビピリジンの開発と有機反応への応用2022

    • Author(s)
      T. Hisada, S. Shiramizu, T. Kitanosono, Y. Yamashita, S. Kobayashi
    • Organizer
      日本化学会第102春季年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 水中キラルルイス酸触媒の非共有結合的担持法の開発2021

    • Author(s)
      田中理史, 北之園拓, 小林修
    • Organizer
      日本化学会第101春季年会
    • Related Report
      2020 Research-status Report
  • [Book] 水中有機合成の開発動向2022

    • Author(s)
      小林修、北之園拓
    • Total Pages
      319
    • Publisher
      シーエムシー出版
    • ISBN
      9784781316635
    • Related Report
      2021 Annual Research Report

URL: 

Published: 2020-04-28   Modified: 2023-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi