Copper‐Catalyzed Asymmetric β‐Boration of α,β‐Unsaturated Carbonyl Derivatives

The β generation: Transition metal- catalyzed asymmetric β-boration of α,β- unsaturated carbonyl derivatives has recently received much attention. Although a variety of metals can be used to promote this reaction, copper has recently emerged as the candidate of choice. Given the appropriate chiral ligand and reaction conditions, the challenging β-boration of β,β-disubstituted cyclic enones is achieved with excellent yields and enantioselectivities.