Reductive Desulfonylation of Sulfonamides under Polysulfide Anions Photocatalysis.

We demonstrate that polysulfide anions are capable of catalyzing desulfonylation of sulfonamides having a series of aryl and alkyl substituents in the presence of potassium formate under irradiation with visible light. The developed protocol is operationally concise and cost-effective, representing a practical and sustainable synthetic tool for desulfonylation and expanding the chemical space in secondary amine synthesis.