A Cu(II)-based strategy for catalytic enantioselective β-borylation of α,β-unsaturated acceptors.

Cu(I)-based chemistry has flourished over the last decade because of the reliable use of species such as soft acids. However, the unique nature of Cu(II) catalysts allows the well-documented Cu(I)-based chemistry to be extended. Prominent advantages of this approach include the ease of handling, the avoidance of strong base, and a wider substrate scope in enantioselective β-borylation.