Copper‐Catalyzed C−H Difluoroalkylation of Coumarins with Fluoroalkyl Bromides
作者:Min Rao、Zhenwei Wei、Yaofeng Yuan、Jiajia Cheng
DOI:10.1002/cctc.202001025
日期:2020.10.20
An efficient method for the copper‐catalyzed selective C−H difluoroalkylation of coumarins and with low cost and readily available ethylbromodifluoroacetate and N‐phenyl bromodifluoroacetamide has been reported. This reaction exhibits good functional group tolerance with respect to coumarins and difluoroalkylation reagents, and several redox‐sensitive substrates have been successfully C−H difluoroalkylated
Copper-Mediated, Palladium-Catalyzed Cross-Coupling of 3-Iodochromones, Thiochromones, and Quinolones with Ethyl Bromodifluoroacetate
作者:Xiaodong Han、Zhizhou Yue、Xiaofei Zhang、Qian He、Chunhao Yang
DOI:10.1021/jo400412k
日期:2013.5.17
The palladium-catalyzed cross-coupling reaction of 3-iodochromones, thiochromones, and quinolones with ethyl bromodifluoroacetate in the presence of a copper mediator is reported. Under optimized conditions, all reactions worked well and provided difluoro-containing products in moderate to excellent yields.