Electrochemically Tunable Vinyl C–H Sulfonylation and Tandem Vinyl C–H Sulfonylation/ N -Alkyl Oxygenation in Enaminones toward Vinyl Sulfones

An electrochemical operation has been developed for the direct sulfonylation of the vinyl C–H bond in enaminones for the synthesis of α-sulfonyl enaminones, which has not been previously realized by any other catalytic method. In addition to the direct vinyl α-C–H sulfonylation, the functionalization of both the vinyl α-C–H and the N -alkyl C–H bonds has been achieved by modifying the electrochemical conditions, leading to the synthesis of another class of new α-C–H sulfonyl enamides with water as the oxygen source.