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 β,γ-unsaturated ketones of <i>E</i> configuration have been obtained in good to excellent yields via KO<sup><i>t</i></sup>Bu/DMSO promoted α-vinylation of aliphatic, cycloaliphatic, and alkyl aromatic (heteroaromatic) ketones with diverse arylacetylenes.