A General Asymmetric Aldol Reaction of Silyl Ketene Acetals Derived from Simple Esters to Aryl α-Keto Esters
作者:Julie Le Engers、Brian L. Pagenkopf
DOI:10.1002/ejoc.200901086
日期:2009.12
A general method for the enantioselective addition of O,O-ketene silyl acetals made from simple esters to α-keto esters catalyzed by a CuCl2·bis(oxazoline) complex is reported that overcomes the limitations of the classic aldol reaction, such as steric intolerance and the need for expensive thio esters. This method excels with aryl α-keto esters and provides products in good yield and high ee that