Excess Phosphine Ligand Plays a Critical Role in the Asymmetric Copper(I) Iodide-Catalyzed Conjugate Addition of Grignard Reagents to α,β-Unsaturated Esters
作者:Shun-Yi Wang、Ping Song、Teck-Peng Loh
DOI:10.1002/adsc.201000631
日期:2010.12.17
ligand in the asymmetric 1,4-conjugate addition (ACA) of Grignard reagents to α,β-unsaturated esters compounds catalyzed by copper(I) iodide-2,2′-bis(di-p-tolylphosphino)-1,1′-binaphthyl (CuI-Tol-BINAP) is explored herein. In addition, this methodology allows asymmetric induction to be carried out using a non-chiral phosphine copper complex with excess of a chiral phosphine ligand.