A facile stereoselective synthesis of 1,3-dienyl sulfones via Stille coupling reactions of ( E)-α-stannylvinyl sulfones with alkenyl iodides

Abstract

Palladium-catalyzed hydrostannylation of acetylenic sulfones 1 in benzene at room temperature gives stereoselectively ( E)-α-stannylvinyl sulfones 2 in good yields. ( E)-α-Stannylvinyl sulfones 2 are new difunctional group reagents which undergo Stille coupling reactions with alkenyl iodides 3 to afford stereoselectively 1,3-dienyl sulfones 4 in high yields.