Palladium(II)/Brønsted Acid‐Catalyzed Enantioselective Oxidative Carbocyclization–Borylation of Enallenes

Abstract

Abstract An enantioselective oxidative carbocyclization–borylation of enallenes that is catalyzed by palladium(II) and a Brønsted acid was developed. Biphenol‐type chiral phosphoric acids were superior co‐catalysts for inducing the enantioselective cyclization. A number of chiral borylated carbocycles were synthesized in high enantiomeric excess.