Unexpected stereoselective CuBr2-catalyzed cascade reaction of 2-ethynylanilines with silylynamides: facile and atom-economical access to N-vinylsilylindoles

A stereoselective, ligand-free, and cost-effective CuBr 2 -catalyzed cascade reaction of 2-ethynylanilines with silylynamides toward valuable N -vinylsilylindoles is developed under air conditions.