enantioselection;
reduction;
rhodium and compounds;
phosphorus compounds;
amino acids and derivatives;
D O I:
10.1016/S0040-4039(00)01099-6
中图分类号:
O62 [有机化学];
学科分类号:
070303 ;
081704 ;
摘要:
Surprisingly high enantioselectivities in the Rh-catalyzed hydrogenation of itaconic acid dimethyl eater and methyl-2-acetamido acrylate are observed upon using chiral monophosphonite ligands derived from binaphthol (ee up to 94%). Although appropriate chelating diphosphonites are more effective, the easy modular synthesis of the chiral monophosphonites may allow for the optimization of a given asymmetric hydrogenation reaction. (C) 2000 Elsevier Science Ltd. All rights reserved.