Different recognitions of (E)- and (Z)-1,1′-binaphthyl ketoximes using lipase-catalyzed reactions
作者:Naoto Aoyagi、Shinji Kawauchi、Taeko Izumi
DOI:10.1016/j.tetlet.2004.05.051
日期:2004.6
Lipase-catalyzed hydrolysis of (E)-2-[alpha-(acetoxyimino)benzyl]-1,1'-binaphthyl [(+/-)-1a] and (Z)-2-[alpha-(acetoxyimino)benzyl]-1,1'-binaphthyl [(+/-)-1b] yielded optically active (E)-2-[alpha-(hydroxyimino)benzyl]-1,1'-binaphthyl [(S)-2a] and (Z)-2-[alpha-(hydroxyimino)benzyl]-1,1'-binaphthyl [(R)-2b], respectively, with high enantiomeric excess. Selectivity for the opposite enantiomer of the axial binaphthyl skeleton was shown by (Z)-isomer 1b against (E-)-isomer 1a. (C) 2004 Elsevier Ltd. All rights reserved.