Tandem Asymmetric Aza-Darzens/Ring-Opening Reactions: Dual Functionality from the Silane Lewis Acid
作者:S. Corey Valdez、James L. Leighton
DOI:10.1021/ja9066354
日期:2009.10.21
rhodium-catalyzed reaction of Ph(2)S with ethyldiazoacetate) to N-acylhydrazones promoted by a chiral silane Lewis acid leads to the highly diastereo- and enantioselective synthesis of beta-chloro-alpha-hydrazido esters. The addition of electron-rich arenes and ZnCl(2) to the reaction mixture leads to the highly diastereo- and enantioselective one-potsynthesis of diarylalanine derivatives. In both cases