Synthesis of Difluoroalkylated Arenes by Hydroaryldifluoromethylation of Alkenes with α,α-Difluoroarylacetic Acids under Photoredox Catalysis.

A visble-light-induced hydroaryldifluoromethylation of alkenes with α,α-difluoroarylacetic acids for preparation of difluoroalkylated arenes has been developed. This reaction proceeds through the hypervalent iodine reagent promoted decarboxylation and subsequent radical hydroaryldifluoromethylation.