Access to <i>gem</i>-Difluoroalkenes via Organic Photoredox-Catalyzed <i>gem</i>-Difluoroallylation of Alkyl Iodides
作者:Songlin Yan、Weijie Yu、Jianye Zhang、Hongmei Fan、Zhifeng Lu、Zhenming Zhang、Tao Wang
DOI:10.1021/acs.joc.1c02659
日期:2022.1.21
gem-difluoroallylation of α-trifluoromethyl alkenes with alkyl iodides via C–F bond cleavage for the synthesis of gem-difluoroalkene derivatives is reported. This transition-metal-free transformation utilized a readily available organic dye 4CzIPN as the sole photocatalyst and employed a common chemical N,N,N′,N′-tetramethylethylenediamine as the radical activator of alkyl iodides via halogen-atom transfer. In addition
报道了一种有机光氧化还原催化的α-三氟甲基烯烃与烷基碘通过 C-F 键断裂进行偕二氟烯丙基化合成偕二氟烯烃衍生物的方法。这种无过渡金属的转化利用容易获得的有机染料 4CzIPN 作为唯一的光催化剂,并使用常见的化学物质N , N , N ', N '-四甲基乙二胺通过卤素原子转移作为烷基碘的自由基活化剂。此外,各种碘化物,包括伯、仲和叔烷基碘,都可以耐受并提供良好至高产率。