Asymmetric Organocatalytic Benzylation of α,β-Unsaturated Aldehydes with Toluenes
作者:Luca Dell'Amico、Xavier Companyó、Tricia Naicker、Thomas M. Bräuer、Karl Anker Jørgensen
DOI:10.1002/ejoc.201300899
日期:2013.8
direct organocatalytic enantioselective benzylation by using toluenes and α,β-unsaturatedaldehydes is presented. The reaction is catalyzed by tert-butyldimethylsilyl-protected diphenylprolinol in the presence of a mild organic base and proceeds with excellent yields and enantioselectivities up to >99 % ee. This reactivity is based on a synergistic effect between the iminium ion intermediate and the