高等学校化学学报 ›› 2022, Vol. 43 ›› Issue (11): 20220555.doi: 10.7503/cjcu20220555

• 有机化学 • 上一篇    

FLPs催化烯胺还原活性研究及反应机理探讨

温志国1, 谯在银2, 田冲1, Borzov Maxim1, 聂万丽1()   

  1. 1.乐山师范学院新能源材料与化学学院, 天然产物化学与小分子催化 四川省高校重点实验室, 乐山 614000
    2.峨眉山宏昇药业股份有限公司, 峨眉山 614200
  • 收稿日期:2022-08-20 出版日期:2022-11-10 发布日期:2022-09-05
  • 通讯作者: 聂万丽 E-mail:niewl126@126.com
  • 基金资助:
    国家自然科学基金(21542011);四川省科技厅计划项目(2020YJ0358);乐山师范学院科研项目与成果培育计划项目(2021SSDJS016);天然产物化学与小分子催化四川省高校重点实验室开放基金重点项目(TRCWYFZCH2019010)

Catalytic Activity and Reaction Mechanism of FLPs for the Reduction of Enamine

WEN Zhiguo1, QIAO Zaiyin2, TIAN Chong1, MAXIM Borzov1, NIE Wanli1()   

  1. 1.Sichuan Province Key Laboratory of Natural Products and Small Molecule Synthesis,School of New Energy Materials and Leshan Normal University,Leshan 614000,China
    2.Emeishan HongSheng Pharmaceutical Co. ,Ltd. ,Emeishan 614200,China
  • Received:2022-08-20 Online:2022-11-10 Published:2022-09-05
  • Contact: NIE Wanli E-mail:niewl126@126.com
  • Supported by:
    the National Natural Science Foundation of China(21542011);the Project of Science and Technology of Sichuan Province, China(2020YJ0358);the Scientific Research and Achievements Cultivation Projects of Leshan Normal University, China(2021SSDJS016);the Key Project of Sichuan Province Key Laboratory of Natural Ptoducts and Small molecule Synthesis, China(TRCWYFZCH2019010)

摘要:

对不同的路易斯碱、 不同取代的氢化硅烷以及不同结构的烯胺进行了研究. 结果表明, 无论在何种光照条件下, 硅氢化反应都不是主要反应; 根据用氘代硅烷试剂对反应机理进行相应的同位素效应研究结果推测, 反应按照自由基机理进行的可能性最为合理. 本文研究结果对探索受限路易斯酸碱对(FLPs)体系的催化方式及进一步拓宽其应用领域具有重要意义.

关键词: 受限路易斯酸碱对, 烯胺, 还原, 机理, 受限自由基对

Abstract:

Over the decade after the pioneering work of frustrated Lewis pair(FLP) chemistry, this research area has achieved tremendous success as novel transition-metal-free system in organic synthesis, enzymatic models, and material sciences. The popularly accepted mechanism of FLP reactivity involves the polarization and heterolytic cleavages of a substrate molecular. Whiles there are also few work showing differing reaction mechanisms for special kinds of Frustrated radical pairs(FRPs), which suggests a homolytic cleavage via one-electron processes. This work studied the Si—H bond activation by B(C6F53 and enamines. In the presence of B(C6F53 enamines did not undergo the expected hydrosilyation with silanes. The dominated hydrogenation products could not match the classic heterolytic cleavages mechanism by B(C6F53 activating R3Si—H and transferring of R3Si+ to a nucleophile. The isotopic experiment results supported a mechanism that proceeds via the highly reactive radical anion[B(C6F53- as the reported FRP behaviors. Understanding the reaction mechanisms is not only crucial to progress in fundamental chemical research but also for further broadens the potential reactivity of FLP systems.

Key words: Frustrated Lewis pair, Enamine, Reduction, Mechanism, Frustrated radical pair

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