作者:Haiwen Xiao、Zhonglin Liu、Haigen Shen、Benxiang Zhang、Lin Zhu、Chaozhong Li
DOI:10.1016/j.chempr.2019.02.006
日期:2019.4
Direct trifluoromethylation of C(sp3)–H bonds, especially in late stages, remains a formidable challenge. Herein, we describe the copper-catalyzed benzylicC(sp3)–H trifluoromethylation. With Cu(I) or Cu(II) as the catalyst, (bpy)Zn(CF3)2 (bpy = 2,2′-bipyridine) as the CF3 source, and NFSI (or Selectfluor) as the oxidant, site-selective benzylicC(sp3)–H trifluoromethylation is successfully implemented
Switchable 2,2,2-Trifluoroethylation and<i>gem</i>-Difluorovinylation of Organoboronic Acids with 2,2,2-Trifluorodiazoethane
作者:Guojiao Wu、Yifan Deng、Chaoqiang Wu、Xi Wang、Yan Zhang、Jianbo Wang
DOI:10.1002/ejoc.201402597
日期:2014.7
The transition-metal-free 2,2,2-trifluoroethylation and gem-difluorovinylation of arylboronic acids were developed. By employing different reaction conditions, these transformations provide both (2,2,2-trifluoroethyl)arenes and gem-difluorovinylarenes from arylboronic acids and 2,2,2-trifluorodiazoethane. The operation is simple and scalable with good functional group tolerance.