Fluoroalkanesulfinate Salts as Dual Fluoroalkyl and SO 2 Sources: Atom-Economical Fluoroalkyl-Sulfonylation of Alkenes and Alkynes by Photoredox Catalysis

We disclose that fluoroalkanesulfinate salts ((R SO ) M) such as the Langlois reagent, CF SO Na, serve as dual fluoroalkyl (R ) and sulfur dioxide (SO ) sources by the action of photoredox catalysis. An operationally simple strategy for the vicinal installation of R and SO groups onto unsaturated carbon-carbon bonds, i.e., , has been developed. In particular, the present photocatalytic can be applied to aromatic alkynes in addition to aliphatic and aromatic alkenes bearing various functional groups.