Direct Introduction of Ethoxycarbonyldifluoromethyl-Group to Heteroarenes with Ethyl Bromodifluoroacetate via Visible-Light Photocatalysis
作者:Qingyu Lin、Lingling Chu、Feng-Ling Qing
DOI:10.1002/cjoc.201300411
日期:2013.7
A mild and versatile approach for the directintroduction of ethoxycarbonyldifluoromethyl‐group to heteroarenesvia visible‐light photocatalysis has been developed. The new photoredox protocol has enabled the difluoromethylenation of heteroarenes containing a wide range of common functional groups under mild conditions.
Visible Light-Promoted Phosphine-Catalyzed Difluoroalkylation of Arenes and Heterocycles
作者:Heng Lu、Dong-yu Wang、Ao Zhang
DOI:10.1021/acs.joc.9b02882
日期:2020.1.17
A visible light-promoted difluoroalkylation reaction of arenes or heterocycles, using triaryl phosphine as the catalyst and difluoroalkyl iodide as the alkylating agent, is presented. The strategy is highlighted by photocatalyst-free, mild reaction conditions and a broad substrate scope. Mechanistic experiments indicate that this reaction involves a radical-chain process that is initiated by an electron