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Creation of Highly Electrophilic Divalent Silicon Scpecies for Small Molecules Activation

Research Project

Project/Area Number 19K22188
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 InstitutionUniversity of Tsukuba (2020)
Nagoya City University (2019)

Principal Investigator

Sasamori Takahiro  筑波大学, 数理物質系, 教授 (70362390)

Project Period (FY) 2019-06-28 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2020: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2019: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Keywords元素資源 / フェロセン / シリレン / ケイ素 / 求電子性 / 酸化還元 / 小分子変換 / 高周期典型元素 / 小分子活性化
Outline of Research at the Start

本研究では、持続可能な社会の実現に向けた挑戦的な反応開拓として、豊富元素による窒素および二酸化炭素の小分子活性化反応を開拓する。元素枯渇問題と資源活用問題を解決するため、稀少な遷移金属を用いずに、豊富元素であるケイ素と鉄を活用した新しい小分子活性化試剤を開発する。電気化学的な酸化還元により、その反応性制御が可能なフェロセニル置換ケイ素二価化学種「シリレン」を基盤とする分子設計を行い、電気化学的な2電子酸化によりシリレン本来の求電子性を究極まで高め、窒素や二酸化炭素の結合をも切断可能な超求電子性シリレンを創製することが本研究課題の目的である。

Outline of Final Research Achievements

The final goal of this research project is the creation of a super-electrophilic silylene, which is a divalent silicon species with extremely high electrophilicity due to its vacant p-orbital and cationic charge. It can be expected the introduction of ferrocenly groups towards the silylene moiety could afford the Redox-controlable electrophilicity depending on the electrochemical properties of the ferrocenyl moieties.
During the course of this project, we have succeeded in the synthesis of a sterically demanding bis(ferrocenyl)dichlorosilane, which would be kinetically protected in order to exist as a monomeric silylene. The reduction of the dichlorosilane with sodium afforded the corresponding silirane derivative, having Si-C-C three-membered ring skeleton. It was found that the obtained silirane could work as a suitable precursor of the corresponding bis(ferrocenyl)silylene under mild conditions.

Academic Significance and Societal Importance of the Research Achievements

窒素や二酸化炭素など豊富な資源を変換するための小分子変換触媒開発は世界的な重要課題である。加えて、稀少元素に替えて豊富な元素を活用する元素資源問題も重要視されている。開発に成功した、鉄とケイ素からなるビス(フェロセニル)シリレンは、豊富元素による小分子変換触媒として期待できる新物質である。今後、本研究成果を基盤として、電気化学的な酸化還元によりこのシリレンの反応性を制御し、超求電子性シリレンへと展開できれば、資源問題に対する解決の糸口となり得る。「シリレンの酸化還元による反応性制御」という反応設計は一般性の高い反応原理となり、これが確立すれば様々な分子変換反応に適用でき、波及効果は大きい。

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (11 results)

All 2020 2019 Other

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (5 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results) Book (1 results) Remarks (1 results)

  • [Journal Article] Generation of Bis(ferrocenyl)silylenes from Siliranes2020

    • Author(s)
      Pan Yang、Morisako Shogo、Aoyagi Shinobu、Sasamori Takahiro
    • Journal Title

      Molecules

      Volume: 25 Issue: 24 Pages: 5917-5917

    • DOI

      10.3390/molecules25245917

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Ferrocenyl-substituted low-coordinated heavier group 14 elements2020

    • Author(s)
      Sasamori Takahiro
    • Journal Title

      Dalton Transactions

      Volume: - Issue: 24 Pages: 8029-8035

    • DOI

      10.1039/d0dt01426e

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Bioactive 1,1′-unsymmetrical bi-functional ferrocenyl compounds using a novel solvent free one pot multicomponent reaction method2020

    • Author(s)
      Barik Tulasi、Ghosh Avishek、Mishra Abtar、Dhiman Rohan、Sasamori Takahiro、Chatterjee Saurav
    • Journal Title

      Journal of Organometallic Chemistry

      Volume: 908 Pages: 121095-121095

    • DOI

      10.1016/j.jorganchem.2019.121095

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Reductive Difunctionalization of Aryl Alkenes with Sodium Metal and Reduction-Resistant Alkoxy-Substituted Electrophiles2020

    • Author(s)
      Fukazawa Mizuki、Takahashi Fumiya、Nogi Keisuke、Sasamori Takahiro、Yorimitsu Hideki
    • Journal Title

      Organic Letters

      Volume: 22 Issue: 6 Pages: 2303-2307

    • DOI

      10.1021/acs.orglett.0c00490

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 5H-ジベンゾゲルモール-5-イリデン誘導体の発生2020

    • Author(s)
      森迫祥吾、野呂幸佑、笹森貴裕
    • Organizer
      第47回有機典型元素化学討論会
    • Related Report
      2020 Annual Research Report
  • [Presentation] ビス(フェロセニル)シリレンの合成検討2020

    • Author(s)
      潘楊、笹森貴裕
    • Organizer
      日本化学会第100春季年会
    • Related Report
      2019 Research-status Report
  • [Presentation] Attempted Synthesis of a Bis(ferrocenyl)silylene2020

    • Author(s)
      Yang Pan, Takahiro Sasamori
    • Organizer
      19th International Symposium on Silicon Chemistry (ISOS-2020)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Formation of 1,2- and 1,4-Disilabenzenes2019

    • Author(s)
      Takahiro Sasamori
    • Organizer
      The 7th Asian Silicon Symposium (ASiS-7), Singapore (Nanyang Technological University)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Small-molecules-activation by the 1,2- and 1,4-Digermabenzenes2019

    • Author(s)
      Takahiro Sasamori
    • Organizer
      International Conference on the Coordination and Organometallic Chemistry of Germanium, Tin and lead ( ICCOC-GTL-16 )
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Book] Reference Module in Chemistry, Molecular Sciences and Chemical Engineering2020

    • Author(s)
      Koh Sugamata, Shogo Morisako, Takahiro Sasamori
    • Total Pages
      15
    • Publisher
      Elsevier
    • Related Report
      2020 Annual Research Report
  • [Remarks]

    • URL

      https://www.nsc.nagoya-cu.ac.jp/~sasamori/www/index.html

    • Related Report
      2019 Research-status Report

URL: 

Published: 2019-07-04   Modified: 2022-01-27  

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