Direct synthesis of highly substituted thiophenes through copper(i)-catalyzed tandem reactions of alkylidenethiiranes with terminal alkynes
A novel copper(i)-catalyzed tandem addition/cycloisomerization reaction of 1-phenylsulfonylalkylidenethiiranes with terminal alkynes for the convergent assembly of 2-(α-phenylsulfonylalkyl)-thiophenes is reported, which could directly assemble various fun