Photoredox Defluorinative Alkylation of 1‐Trifluoromethyl Alkenes and 1,3‐Butadienes with 1,4‐Dihydropyridines as Alkylation Reagents

Abstract A radical defluorinative alkylation method of 1‐trifluoromethyl alkenes and 1,3‐butadienes with 4‐alkyl‐1,4‐dihydropyridines under visible light irradiation is presented. Various alkylated 1,1‐difluoroalkenes and 1,1‐difluorodienes were obtained in moderate to high yields through a sequential C−C and C−F bond cleavage process.