Enantioselective hydrogenation of pyrrolidine-2,3,5-triones over the Pt–cinchonidine system
作者:A Szabo、N Künzle、T Mallat、A Baiker
DOI:10.1016/s0957-4166(98)00499-6
日期:1999.1
1- and I-Substituted pyrrolidine-2,3,5-triones 5, 6 and 9 have been synthesized and hydrogenated to 3-hydroxy derivatives 10-12 with 17-91% ee using a 5 wt% Pt/Al2O3 catalyst in the presence of small amounts of cinchonidine. The influence of substituents on the enantioselectivity is discussed. (C) 1999 Elsevier Science Ltd. All rights reserved.