Study of the effect of the nature of the side chain in esters of -amino acids on the diastereoselectivity of condensation with 5(4H)-oxazolone in the synthesis of dipeptides with N-terminal N-acetylphenylalanine
作者:V. P. Krasnov、E. A. Zhdanova、N. Z. Solieva、L. Sh. Sadretdinova、I. M. Bukrina、A. M. Demin、G. L. Levit、M. A. Ezhikova、M. I. Kodess
DOI:10.1023/b:rucb.0000042296.13831.bd
日期:2004.6
Conditions for fast racemization of 5(4H)-oxazolones prepared from N-acylphenylalanine were found. Reactions of 4-benzyl-2-methyl-5(4H)-oxazolone with amino acid esters proceed diastereoselectively to give predominantly dipeptides comprising R-phenylalanine. The diastereoselectivity increases with complication of the structure of the side chain in the amino acid esters.
发现了由 N-酰基苯丙氨酸制备的 5(4H)-恶唑酮的快速外消旋化条件。4-苄基-2-甲基-5(4H)-恶唑酮与氨基酸酯的反应非对映选择性地进行以产生主要包含R-苯丙氨酸的二肽。非对映选择性随着氨基酸酯侧链结构的复杂化而增加。