Potassium Hydroxide‐Catalyzed Alkynylation of Heteroaromatic N‐Oxides with Terminal Alkynes

Abstract An efficient potassium hydroxide‐catalyzed alkynylation of heteroaromatic N‐oxides under transition‐metal‐free conditions with the assistance of visible‐light has been developed. Various C2‐alkynylheterocycles were obtained in up to 92% yield with good functional group tolerance. This new method is operational simple, highly efficient, atom economic, and environmental friendly. magnified image