可见光/路易斯碱协同催化的三氟甲基取代烯烃脱氟硅化反应研究  

Research of Visible Light/Lewis Base Dual Catalytic Defluorinative Silylation of Trifluoromethyl-Substituted Alkenes

作　　者：朱佳洁 万义 袁启洋 魏金莲 张永强 Zhu Jiajie;Wan Yi;Yuan Qiyang;Wei Jinlian;Zhang Yongqiang(School of Pharmacy,East China University of Science and Technology,Shanghai 200237)

机构地区：[1]华东理工大学药学院,上海200237

出　　处：《有机化学》2023年第10期3623-3634,共12页Chinese Journal of Organic Chemistry

基　　金：国家自然科学基金(No.22171080);上海市自然科学基金(No.23ZR1417200)资助项目。

摘　　要：以三氟甲基取代烯烃为底物,使用硅硼烷为硅自由基供体,开发了一项可见光/路易斯碱协同催化的脱氟硅化反应新技术,实现了多样性偕二氟烯丙基硅砌块的绿色高效合成.新反应以奎宁环为路易斯碱催化剂,通过其对硅硼键的辅助活化促进硅自由基生成,表现出绿色温和、体系简单、易于放大、底物适用范围广和官能团兼容性强等优势.此外,本研究还初步展示了该类合成砌块在多类型含偕二氟甲基结构单元构建中的应用.A novel photoredox/Lewis base dual-catalytic defluorinative silylation reaction of trifluoromethylsubstituted alkenes for the synthesis of gem-difluoroallylsilanes is reported,where silylboranes are employed as the silyl donor reagents.The protocol proceeds via the catalytic activation of Si—B bond by a Lewis base quinuclidine and the formation of silyl radical,making it easy to scale up.It features mild and green reaction conditions,simple reaction system,broad substrate scope and good functional group compatibility.Furthermore,the potential of this class of building blocks in the construction of various gem-difluoromethyl-containing structures has been also demostrated.

关 键 词：可见光催化 路易斯碱催化 硅硼烷 三氟甲基取代烯烃 偕二氟烯丙基硅合成 

分 类 号：O621.251[理学—有机化学]