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Precise Organic Synthesis by Developing Novel Radical Control Methods

Research Project

Project/Area Number 22K19016
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 InstitutionHokkaido University

Principal Investigator

Shimizu Yohei  北海道大学, 理学研究院, 准教授 (60609816)

Project Period (FY) 2022-06-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2023: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2022: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywordsラジカル / 光 / 塩素 / C-H変換反応 / ホスフィン触媒 / アミノ化 / 触媒 / 有機合成
Outline of Research at the Start

本研究は、ラジカルという反応性が非常に高い活性種を触媒によって制御し、生物活性物質等の機能性分子合成の発展に寄与することを目的としている。可視光をクリーンなエネルギー源としたラジカル発生法を基礎として、ここに触媒としてリン化合物やピリジン型化合物等を添加することで、ラジカルの反応性を制御する。不活性C(sp3)-H結合の位置選択的変換反応や、炭素-炭素不飽和結合への立体選択的付加反応をモデル反応として、触媒の探索と最適化を推し進める。

Outline of Final Research Achievements

Phosphine catalysts are found to be effective in controlling the reactivity of chlorine radicals, which are known as highly reactive chemical species. The influence of the structure of the phosphine catalyst is critical, and some insights into structural features that contribute to precise control of the radical were obtained. In addition, we developed an aminochlorination of alkenes under visible light irradiation by utilizing N-chloro(fluorenone imine). This reaction starts with the addition of chlorine radicals to an alkene, and exhibits unique regio-selectivity, introducing a chlorine atom at the terminal position and an amino group at the internal position.

Academic Significance and Societal Importance of the Research Achievements

これまで有効な制御方法のなかった塩素ラジカルの反応性制御にホスフィン触媒という新たな方向性を提唱するものであり、学術的意義は大きい。本方法をさらに発展させることで、一般に不活性な結合であるC(sp3)-H結合を狙った位置選択的な変換反応開発が加速され、医薬分子をはじめとした機能性分子の合成法革新に寄与すると考えられる。またアミノクロロ化反応で得られる生成物は、さまざまな変換を行うことが出来る化合物であり、機能性分子合成に資する多能性中間体として価値が高い。

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (24 results)

All 2024 2023 2022

All Journal Article (4 results) (of which Peer Reviewed: 4 results) Presentation (20 results) (of which Int'l Joint Research: 5 results,  Invited: 2 results)

  • [Journal Article] Visible-Light-Induced Aminochlorination of Alkenes2023

    • Author(s)
      Mejri Emna、Higashida Kosuke、Kondo Yuta、Nawachi Anna、Morimoto Hiroyuki、Ohshima Takashi、Sawamura Masaya、Shimizu Yohei
    • Journal Title

      Organic Letters

      Volume: 25 Issue: 24 Pages: 4581-4585

    • DOI

      10.1021/acs.orglett.3c01645

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Direct α-Trifluoromethylthiolation of Carboxylic Acids Enabled by Boron Catalysis2023

    • Author(s)
      Huang Chung-Yang Dennis、Shimizu Yohei、Sun Kai、Sawamura Masaya
    • Journal Title

      Synlett

      Volume: 34 Issue: 18 Pages: 2210-2214

    • DOI

      10.1055/a-2071-4465

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Boron‐Catalyzed α‐Functionalizations of Carboxylic Acids2023

    • Author(s)
      Shimizu Yohei、Kanai Motomu
    • Journal Title

      The Chemical Record

      Volume: - Issue: 7 Pages: 1-18

    • DOI

      10.1002/tcr.202200273

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Boron Catalysis in the Transformation of Carboxylic Acids and Carboxylic Acid Derivatives2022

    • Author(s)
      Sawamura Masaya、Shimizu Yohei
    • Journal Title

      European Journal of Organic Chemistry

      Volume: 26 Issue: 1

    • DOI

      10.1002/ejoc.202201249

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] ホスフィン触媒を用いた2-アルキルピリジン類のsp3-C-Hアミノ化2024

    • Author(s)
      平家 嘉人・田方 朝・清水 洋平・澤村 正也
    • Organizer
      日本化学会第104春季年会(2024)
    • Related Report
      2023 Annual Research Report
  • [Presentation] Silver-Catalyzed Asymmetric Aldol Reaction and Michael Reaction of Activated Isocyanides2024

    • Author(s)
      Satoshi Sakai, Kei Uchiyama, Kazuna Yato, Koji Imai, Kosuke Higashida, Yohei Shimizu, Masaya Sawamura
    • Organizer
      日本化学会第104春季年会(2024)
    • Related Report
      2023 Annual Research Report
  • [Presentation] 可視光が駆動するアルケンの窒素導入型二官能基化反応2024

    • Author(s)
      田方 朝・Emna Mejri・清水 洋平・澤村 正也
    • Organizer
      日本化学会第104春季年会(2024)
    • Related Report
      2023 Annual Research Report
  • [Presentation] ホウ素触媒によるカルボン酸ドナーとα,β-不飽和カルボン酸アクセプターのマイケル反応2024

    • Author(s)
      吉田 薫穂・清水 洋平・澤村 正也
    • Organizer
      日本化学会第104春季年会(2024)
    • Related Report
      2023 Annual Research Report
  • [Presentation] Direct 1,5-Dicarboxylic Acid Synthesis by Boron-catalyzed Michael Reaction of Carboxylic Acid Donor-Acceptor Couples2024

    • Author(s)
      Yukiho Yoshida, Yohei Shimizu, Masaya Sawamura
    • Organizer
      The 7th ICReDD International Symposium
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Synthesis of sterically congested primary amines by photoinduced aminodifunctionalization of alkenes2024

    • Author(s)
      Asa Tagata, Emna Mejri, Kosuke Higashida, Yohei Shimizu, Masaya Sawamura
    • Organizer
      The 7th ICReDD International Symposium
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Visible-Light-Induced Aminofunctionalization of Alkenes2023

    • Author(s)
      Yohei Shimizu, Mejri Emna, Asa Tagata, Masaya Sawamura
    • Organizer
      International Joint Symposium 2023 on Synthetic Organic Chemistry
    • Related Report
      2023 Annual Research Report
  • [Presentation] 可視光が駆動するホウ素触媒カルボン酸α位アミノオキシ化反応2023

    • Author(s)
      清水 洋平・大山 翼・吉田 薫穂・森沢 卓斗・澤村 正也
    • Organizer
      第132回触媒討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Silver-catalyzed Asymmetric Aldol and Michael Reactions of Activated Isocyanides2023

    • Author(s)
      Satoshi Sakai, Kei Uchiyama, Kazuna Yato, Koji Imai, Kosuke Higashida, Yohei Shimizu, Masaya Sawamura
    • Organizer
      第69回有機金属化学討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Intermolecular Forces-Enabled Enantioface-Discrimination of Ketones and Construction of tetra-Substituted Chiral Carbon Centers2023

    • Author(s)
      Satoshi Sakai, Kei Uchiyama, Kazuna Yato, Kosuke Higashida, Yohei Shimizu, Masaya Sawamura
    • Organizer
      Symposium on Molecular Chirality 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Computational Studies on the Mechanism of Phenol-NHC-Copper Catalyzed Enantioselective Transformation2023

    • Author(s)
      Akito Kitabayashi, Yohei Shimizu, Kosuke Higashida, Masaya Sawamura
    • Organizer
      Symposium on Molecular Chirality 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ケトンを求電子剤とする銀触媒不斉アルドール反応の開発2023

    • Author(s)
      酒井 聡史・内山 渓・矢藤 千菜・今井 洸児・東田 皓介・清水 洋平・澤村 正也
    • Organizer
      第33回万有福岡シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] 単純ケトンとイソシアノ酢酸類の銀触媒不斉アルドール反応2023

    • Author(s)
      内山渓、酒井聡史、矢藤千菜、今井洸児、東田皓介、清水洋平 、澤村正也
    • Organizer
      化学系学協会北海道支部2023年冬季研究発表会
    • Related Report
      2022 Research-status Report
  • [Presentation] Catalyst-free visible-light-induced aminochlorinationof alkenes2023

    • Author(s)
      Emna Mejri, Yohei Shimizu, Masaya Sawamura
    • Organizer
      化学系学協会北海道支部2023年冬季研究発表会
    • Related Report
      2022 Research-status Report
  • [Presentation] DFT計算による銅触媒シクロプロパノール開環不斉アリル化の反応経路と不斉制御の解析2023

    • Author(s)
      北林亮人、水島祥、東田皓介、清水洋平、澤村正也
    • Organizer
      化学系学協会北海道支部2023年冬季研究発表会
    • Related Report
      2022 Research-status Report
  • [Presentation] α-Functionalization of Carboxylic Acids Driven by Boron Catalyst and Visible Light2023

    • Author(s)
      Yohei Shimizu
    • Organizer
      7th International Conference on CATALYSIS AND CHEMICAL ENGINEERING
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 保護基フリー合成を指向した化学選択的触媒反応の開発2023

    • Author(s)
      清水洋平
    • Organizer
      2022年度 日本化学会北海道支部奨励賞(若手)受賞講演会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] ホウ素触媒と可視光によるカルボン酸α位アミノ化反応2023

    • Author(s)
      大山 翼、森沢 卓斗、清水 洋平、澤村 正也
    • Organizer
      日本化学会第103春季年会(2023)
    • Related Report
      2022 Research-status Report
  • [Presentation] 非共有結合性相互作用の複合効果に着目したイソシアノ酢酸類の銀触媒不斉アルドール反応の開発2022

    • Author(s)
      酒井 聡史、内山 渓、今井 洸児、藤岡 茜、東田 皓介、清水 洋平、澤村 正也
    • Organizer
      第130回触媒討論会
    • Related Report
      2022 Research-status Report
  • [Presentation] 実験ー量子化学計算の協奏で挑む酵素模倣型高機能触媒の開発2022

    • Author(s)
      清水洋平、東田 皓介
    • Organizer
      第8回北大・部局横断シンポジウム
    • Related Report
      2022 Research-status Report

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Published: 2022-07-05   Modified: 2025-01-30  

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