Visible Light‐Mediated Trifluoromethylation of Fluorinated Alkenes via C−F Bond Cleavage

Abstract A convenient photoredox‐catalyzed defluorinative trifluoromethylation of α ‐trifluoromethyl alkenes and gem ‐difluoroalkenes is developed. The reactions proceeded efficiently via trifluoromethyl radical addition followed by β ‐fluorine elimination process, providing a new entry to multifluorinated alkenes in moderate to good yields with excellent stereoselectivity. magnified image