Photoredox‐Catalyzed Chlorosulfonylation of gem ‐Difluoroalkenes

A visible‐light‐catalyzed chlorosulfonylation reaction of gem ‐difluoroalkenes has been successfully developed using sulfonyl chloride as both the sulfonyl group and chlorine source. The reaction proceeds under mild, additive‐free conditions, generating α , α ‐difluoromethyl‐ β ‐chlorosulfones with excellent regioselectivity and broad substrate scope. The β ‐chlorosulfone product serves as versatile intermediate, readily converting into valuable derivatives such as β ‐azido sulfone. This method provides rapid access to functional fluorinated scaffolds relevant to medicinal chemistry.