Photoredox-catalyzed cascade difluoromethylation/SO 2 reintegration/polyfluoroarylation of conjugated dienes with a bifunctional CF 2 HSO 2 Na reagent

A visible-light-driven, photoredox-catalyzed difluoromethylation, SO 2 reintegration, and polyfluoroarylation cascade of conjugated dienes has been developed, employing CF 2 HSO 2 Na as a bifunctional reagent and polyfluoroarenes as terminating agents.