Electrochemical Oxidative Carbonylation of H-Sulfoximines.

The electrochemical synthesis of -aroylsulfoximines features the use of tetra--butylammonium iodide (TBAI) as the medium and a broad substrate scope, thus affording a wide range of -aroylated sulfoximines in moderate to good yields. The advantages of this electrochemical strategy are augmented by mild reaction conditions that are external oxidant-free, ligand-free, and easy to scale up to gram scale. Both the control experiments and the mechanistic studies revealed that the whole electrochemical process proceeded through a palladium (II/IV/II) catalytic cycle.