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Design of coordinatively unsaturated transition metal complexes for controlled radical reactions

Research Project

Project/Area Number 16K13996
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Synthetic chemistry
Research InstitutionKyushu University

Principal Investigator

Nagashima Hideo  九州大学, 先導物質化学研究所, 教授 (50159076)

Co-Investigator(Kenkyū-buntansha) 田原 淳士  九州大学, 先導物質化学研究所, 助教 (50713145)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywordsラジカル反応 / 不斉合成 / 遷移金属触媒 / 配位不飽和錯体 / 触媒的不斉合成 / 遷移金属錯体 / 水溶媒 / 鉄 / 不斉反応 / 不斉配位子 / 一電子酸化還元反応 / ラジカル / マンガン、鉄、コバルト / 不斉錯体 / 擬ハロゲン配位子 / トリアザシクロノナン配位子 / 一電子酸化還元 / 有機ハロゲン化合物 / 動的速度論分割
Outline of Final Research Achievements

Coordinatively unsaturated transition metal complexes were synthesized and subjected to studies on dynamic resolution of secondary alkyl halides and asymmetric addition of bromotrichloromethane to styrene. The hydrophobic effect of water as the solvent was examined to achieve efficient asymmetric induction. Four new Fe complexes derived from 1,4,7-triazacyclononane ligands and chiral diols or a chiral sulfonic acid were synthesized and characterized. These unfortunately did not show good catalytic activity and asymmetric induction. Transition metal complexes were prepared from Rh, Ru, Ir, Fe, Co, or Cu precursors and a chiral bidentate phosphine. Among them, the Rh complexes exhibit excellent catalytic activity and moderate asymmetric induction for the addition reaction of bromotrichloromethane to styrene in both organic solvents and water. In contrast, the Fe complexes showed good catalytic activity only in organic solvents, and no asymmetric induction was observed.

Academic Significance and Societal Importance of the Research Achievements

ラジカル反応は有機・高分子合成反応に広範に利用されているが、その反応制御、とくに、高い選択性を持つ反応の実現は困難である。本研究では、ラジカル種の不斉制御を、適切に設計された配位不飽和遷移金属錯体と水の疎水性効果の組み合わせを用いることにより、この困難な課題の解決を図ったものである。成果として、触媒活性と不斉誘起双方を達成するには、触媒の2電子酸化還元機能と水の疎水性効果が有効であること、逆に、1電子酸化還元能力が高い触媒は高い触媒活性を示すが、不斉誘起能力に欠けること、水溶性を示す触媒は疎水性効果を発現しにくい、といった、当該課題の解決に有効な要因を明らかにした。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (15 results)

All 2019 2018 2017 2016 Other

All Int'l Joint Research (2 results) Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (10 results) (of which Int'l Joint Research: 5 results,  Invited: 2 results) Remarks (2 results)

  • [Int'l Joint Research] 南洋理工大学(シンガポール)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Nanyang Technological University(singapore)

    • Related Report
      2017 Research-status Report
  • [Journal Article] 原子移動型ラジカル重合用鉄触媒設計法2019

    • Author(s)
      永島英夫
    • Journal Title

      触媒

      Volume: 61

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] Reverse ATRP of St and MMA Catalyzed by Me3TACNFeX3 (X = Cl, Br)2019

    • Author(s)
      Atsushi Tahara, Yuto Ii, Yusuke Sunada, Mitsunobu Kawamura, Hideo Nagashima
    • Organizer
      IRCCS The 2nd International Symposium
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Reverse Atom Transfer Radical Polymerization of St and MMA Catalyzed by Me3TACNFeX3 (X = Cl, Br)2018

    • Author(s)
      Atsushi Tahara, Yuto Ii, Yusuke Sunada, Mitsunobu Kawamura, Hideo Nagashima
    • Organizer
      第65回有機金属化学討論会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Hydrosilylation of Alkene with Hydrosiloxanes Catalyzed by Co(0) or Fe(0) Isocyanide Complexes,2017

    • Author(s)
      Atsushi Sanagawa, Hideo Nagashima
    • Organizer
      IRCCS-JST CREST Joint Symposium
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Atom Transfer Radical Polymerization by solvent-stabilized (Me3TACN)FeX22017

    • Author(s)
      So-ichiro Nakanishi, Mitsunobu Kawamura, Yusuke Sunada, Atsushi Tahara, Hideo Nagashima
    • Organizer
      IRCCS-JST CREST Joint Symposium
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] コバルト及び鉄イソシアニド錯体触媒によるヒドロシロキサンを用いるアルケンのヒドロシリル化反応2017

    • Author(s)
      真川 敦嗣、永島英夫
    • Organizer
      第64回有機金属化学討論会
    • Related Report
      2017 Research-status Report
  • [Presentation] コバルトイソシアニド錯体触媒による官能基を有するアルケンのヒドロシリル化2017

    • Author(s)
      真川敦嗣、永島英夫
    • Organizer
      第21回ケイ素化学協会シンポジウム
    • Related Report
      2017 Research-status Report
  • [Presentation] Controlled radical polymerization by iron(III) complexes bearing Me3TACN ligands2017

    • Author(s)
      II, Yuto; TAHARA, Atsushi; KAWAMURA, Mitsunobu; SUNADA, Yusuke; NAGASHIMA, Hideo
    • Organizer
      日本化学会第98春季年会
    • Related Report
      2017 Research-status Report
  • [Presentation] 溶媒によって安定化された単核鉄触媒を用いた原子移動ラジカル重合反応2016

    • Author(s)
      中西崇一朗・田原淳士・河村充展・砂田祐輔・永島英夫
    • Organizer
      第63回有機金属化学討論会
    • Place of Presentation
      早稲田大学西早稲田キャンパス、東京
    • Year and Date
      2016-09-14
    • Related Report
      2016 Research-status Report
  • [Presentation] Element Strategy Initiative in Homogeneous Catalysis: A Brief Overview from Catalysis of Iron2016

    • Author(s)
      Hideo Nagashima
    • Organizer
      BASE METAL CATALYSIS SYMPOSIUM
    • Place of Presentation
      Princeton University, USA
    • Year and Date
      2016-09-01
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Element Strategy Initiative in Homogeneous Catalysis: A Brief Overview from Catalysis of Iron2016

    • Author(s)
      Hideo Nagashima
    • Organizer
      JST-NTU Joint Seminar on Sustainable Synthesis and Catalysis
    • Place of Presentation
      Nanyang Technological University, Singapore
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Remarks] 研究室HP

    • URL

      http://nagashima-lab.cm.kyushu-u.ac.jp/

    • Related Report
      2018 Annual Research Report
  • [Remarks] 「鉄が生み出す新たな可能性」マイナビニュース 2018年2月15日

    • URL

      https://news.mynavi.jp/article/nanotech2018-9/

    • Related Report
      2017 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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