Highly Efficient and Selective Synthesis of (E)‐α,β‐Unsaturated Ketones by Crossed Condensation of Ketones and Aldehydes Catalyzed by an Air‐Stable Cationic Organobismuth Perfluorooctanesulfonate

An air‐stable cationic organobismuth perfluorooctanesulfonate possessing both acidic and basic characters was synthesized, and showed high catalytic activity, diastereoselectivity, stability, and reusability in the one‐pot synthesis of (E)‐α,β‐unsaturated ketones through highly selective crossed condensation of ketones and aldehydes in water.