Arylsulfonylacetylenes as Alkynylating Reagents of C sp 2H Bonds Activated with Lithium Bases

Chameleon: A new strategy for the synthesis of a wide variety of alkynyl derivatives by the reaction of substituted arylsulfonylacetylenes with organolithium species is described (see scheme). The high yields, the simplicity of the experimental procedure, the broad scope of this reaction, and the formation of CspC sp 2 bonds without using transition metals are the main features of this methodology.