Enantioselective Hydrogenation of the Double Bond of Exocyclic α,β‐Unsaturated Carbonyl Compounds Catalyzed by Iridium/H₈‐BINOL‐Derived Phosphine‐Oxazoline Complexes

Abstract

Abstract H 8 ‐BINOL‐derived phosphine‐oxazolines complexed with iridium were successfully applied for the asymmetric hydrogenation of the carbon‐carbon double bond of exocyclic α,β‐unsaturated carbonyl compounds. A valuable series of α‐chiral cyclic ketones, lactones, and lactams were therefore provided via the reaction in high yields and good to excellent enantioselectivity of up to 95 % ee . The effects of the ligands and substrate structures on the asymmetric catalysis were also discussed.