Epoxidation of Peptidyl Olefin Isosteres. Stereochemical Induction Effect of Chiral Centers at Four Adjacent Cα Positions
作者:Nurit Perlman、Mordechai Livneh、Amnon Albeck
DOI:10.1016/s0040-4020(00)00036-3
日期:2000.3
Four tripeptidyl olefin isosteres were prepared, each of which contains a single chiral center derived from the bulky amino acid phenylalanine at positions corresponding to the P-2-P'(2) positions of a protease substrate. The effect of these chiral centers on the stereochemical outcome of mCPBA epoxidation of the olefin functionality was studied. A chiral center at P-2 or P'(2) position has no significant effect, and the P'(1) position exerts a small stereoselectivity. A chiral center at the P-1 position, on the other hand, has a profound chiral induction effect on the epoxidation reaction. (C) 2000 Elsevier Science Ltd. All rights reserved.