Catalytic Enantioselective Synthesis of Quaternary All-Carbon Stereogenic Centers. Preparation of α,α‘-Disubstituted β,γ-Unsaturated Esters through Cu-Catalyzed Asymmetric Allylic Alkylations
作者:Kerry E. Murphy、Amir H. Hoveyda
DOI:10.1021/ol047331r
日期:2005.3.1
prepared from commercially available materials, are used to promote Cu-catalyzed asymmetric allylic alkylations of alpha,beta-unsaturated esters bearing a gamma-phosphate with various alkylzinc reagents. These transformations lead to the formation of alpha,alpha'-dialkyl-beta,gamma-unsaturated esters in high yields as well as high regio- (re) and enantioselectivities (ee).
[反应:见正文]易于从市售材料制备的基于肽的手性配体,用于通过各种烷基锌试剂促进Cu催化的带有γ-磷酸酯的α,β-不饱和酯的不对称烯丙基烷基化反应。这些转化导致以高收率以及高区域选择性和对映选择性ee形成α,α′-二烷基-β,γ-不饱和酯。