Visible-Light-Mediated α-Ketoacylations of <i>N</i>H-Sulfoximines with <i>gem</i>-Difluoroalkenes

Abstract

A photochemical approach for the preparation of α-keto-<i>N</i>-acyl sulfoximines from <i>N</i>H sulfoximines and <i>gem</i>-difluoroalkenes has been developed. In the presence of NBS, the reactions proceed in air without the need of a photocatalyst or additional oxidant. Results of mechanistic studies suggest that the two oxygens in the products stem from water and dioxygen.