摘要:
Asymmetric aldol reactions of aliphatic ketones or aldehydes with aromatic aldehydes or isatins were catalyzed by a very simple and flexible N-(2,6-difluorophenyl)-L-valinamide. Interestingly, stereochemical course of the reaction of hydroxyacetones or alpha-branched aliphatic aldehydes as aldol donors was different from that of cycloalkanones. (C) 2014 Elsevier Ltd. All rights reserved.