Preparation of enantiomerically pure (R)- and (S)-3-amino-3-phenyl-1-propanol via resolution with immobilized penicillin G acylase
作者:Nitin W. Fadnavis、Kasiraman R. Radhika、A. Vedamayee Devi
DOI:10.1016/j.tetasy.2005.12.022
日期:2006.1
Ethyl 2,4-dioxo-4-phenylbutyrate, obtained by condensation of acetophenone with diethyl oxalate, was converted to 3-oxo-3-phenyl-1-propanol in 90% yield by reaction with baker's yeast. Reductive amination with sodium cyanoborohydride in the presence of ammonium acetate gave the racemic 3-amino-3-phenyl-1-propanol in 65% yield. Enzymatic resolution of the corresponding N-phenylacetyl derivative with penicillin G acylase, immobilized on an epoxy resin gave (S)-amide and (R)-amino alcohol in high enantiomeric purity (ee > 99%) and > 45% yields for each enantiomer. (c) 2006 Elsevier Ltd. All rights reserved.