<i>C</i><sub>2</sub>-Symmetric Copper(II) Complexes as Chiral Lewis Acids. Catalytic Enantioselective Aldol Additions of Silylketene Acetals to (Benzyloxy)acetaldehyde
作者:David A. Evans、Jerry A. Murry、Marisa C. Kozlowski
DOI:10.1021/ja960712i
日期:1996.1.1
The Lewis acid-catalyzed addition of enolsilanes to aldehydes, commonly known as the Mukaiyamaaldolreaction, 1,2 is an important variant of the general aldol process. This reaction has become the focal point for the development of enantioselective variants through catalysis by chiral Lewisacids. 3 In this communication we document the use of copper(II) complexes as effective enantioselective catalysts
路易斯酸催化的烯醇硅烷与醛的加成反应,通常称为 Mukaiyama 醛醇反应,1,2 是一般醛醇过程的一个重要变体。该反应已成为通过手性路易斯酸催化开发对映选择性变体的焦点。3 在这篇通讯中,我们记录了铜 (II) 配合物作为该过程的有效对映选择性催化剂的使用,其中催化剂通过双齿配位活化特定的醛,这是先前为该过程报道的手性催化剂所不常见的组织特征。3
Asymmetric Catalytic Aldol-type Reaction with Ketene Silyl Acetals: Possible Intervention of the Silatropic Ene Pathway