Transition metal-free and regioselective alkenyl C–S cross-coupling reaction of alkenylsulfonium salts†

Herein, we report a novel and highly efficient strategy for the construction of alkenyl sulfoxides via transition metal-free C–S cross-coupling of sulfenate anions with alkenylsulfonium salts. This procedure features the capture of in situ generated sulfenate anions from β-sulfinyl esters under mild conditions, which provides an efficient strategy for the synthesis of diverse alkenyl sulfoxides in moderate to good yields.