Enantioselective copper(II)-catalyzed conjugate addition of diethylzinc to beta-substituted enones utilizing BINOL-based phosphoramidite ligands

摘要

A family of new chiral phosphoramidite ligands based on 3,3'-disubstituted (S)-BINOL have been successfully synthesized. The chiral phosphoramidite ligands were subsequently applied to the copper(II)-catalyzed enantioselective addition of diethylzinc to beta-substituted enones, giving the desired chiral adducts with enantioselectivities of up to 93% ee and high yields (up to 88%). (C) 2016 Elsevier Ltd. All rights reserved.