A highly efficient asymmetric conjugate addition of methylmagnesium bromide (MeMgBr) to α,β-unsaturated esters catalyzed by copper(I) iodide-tolyl-BNIP (CuI-Tol-BINAP) is described.
On the Mechanism of the Copper-Catalyzed Enantioselective 1,4-Addition of Grignard Reagents to α,β-Unsaturated Carbonyl Compounds
作者:Syuzanna R. Harutyunyan、Fernando López、Wesley R. Browne、Arkaitz Correa、Diego Peña、Ramon Badorrey、Auke Meetsma、Adriaan J. Minnaard、Ben L. Feringa
DOI:10.1021/ja0585634
日期:2006.7.19
The mechanism of the enantioselective 1,4-addition of Grignardreagents to alpha,beta-unsaturated carbonyl compounds promoted by copper complexes of chiral ferrocenyl diphosphines is explored through kinetic, spectroscopic, and electrochemical analysis. On the basis of these studies, a structure of the active catalyst is proposed. The roles of the solvent, copper halide, and the Grignardreagent have
Copper‐Catalyzed Enantioselective Conjugate Addition of Grignard Reagents to α,β‐Unsaturated Esters
作者:Fernando López、Syuzanna R. Harutyunyan、Auke Meetsma、Adriaan J. Minnaard、Ben L. Feringa
DOI:10.1002/anie.200500317
日期:2005.4.29
A Highly Catalytic Asymmetric Conjugate Addition: Synthesis of the C14−C20 Fragment of Antibiotic TMC-151A, Siphonarienal and Siphonarienone
作者:Tze-Keong Lum、Shun-Yi Wang、Teck-Peng Loh
DOI:10.1021/ol702715q
日期:2008.3.1
A highly selective and general method for the synthesis of enantiopure deoxypropionates via the iterative application of CuI-ToI-BINAP-catalyzed asymmetric conjugate addition is described. This method gives access to all possible stereoisomers since both syn- and anti-deoxypropionates were obtained in high diastereoselectivities. The usefulness of the method is further exemplified by the preparation of two marine organisms, siphonarienal and siphonarienone, from commercially available trans-2-hexenoate.