Transition-Metal-Free Superbase-Promoted Stereoselective α-Vinylation of Ketones with Arylacetylenes: A General Strategy for Synthesis of β,γ-Unsaturated Ketones

A wide variety of beta,gamma-unsaturated ketones of E configuration have been obtained in good to excellent yields via (KOBu)-Bu-t/DMSO promoted alpha-vinylation of aliphatic, cycloaliphatic, and alkyl aromatic (heteroaromatic) ketones with diverse arylacetylenes.