NMDA antagonist activity of (.+-.)-(2SR,4RS)-4-(1H-tetrazol-5-ylmethyl)piperidine-2-carboxylic acid residues with the (-)-2R,4S-isomer
作者:Paul L. Ornstein、Darryle D. Schoepp、M. Brian Arnold、Noel D. Jones、Jack B. Deeter、David Lodge、J. David Leander
DOI:10.1021/jm00095a004
日期:1992.8
The tetrazole-substituted amino acid (+/-)-(2SR,4RS)-4-(1H-tetrazol-5-ylmethyl)pip eri dine-2-carboxylic acid (LY233053, (+/-)-1) was resolved into its constituent enantiomers by treatment of a key intermediate in the synthesis of the racemic amino acid, ethyl (+/-)-cis-4-(cyanomethyl)-N-allylpiperidine-2-carboxylate, with either 2S,3S- or 2R,3R-di-p-toluoyltartaric acid. These resolved amines were then
拆分了四唑取代的氨基酸(+/-)-(2SR,4RS)-4-(1H-四唑-5-基甲基)哌啶二羧酸(LY233053,(+/-)-1)通过在外消旋氨基酸合成中的关键中间体(+/-)-顺式-4-(氰甲基)-N-烯丙基哌啶-2-羧酸乙酯的合成过程中的关键中间体的组成,将其合成为对映体,3R-二-对甲苯基酒石酸。然后将这些拆分的胺的外消旋体转化为氨基酸(-)-1和(+)-1。发现该有效且选择性的NMDA拮抗剂的活性与1的(-)-异构体(LY235723)相同。X射线晶体学分析的是顺式4-(氰基甲基)-N-烯丙基哌啶-2-羧酸乙酯的2S,3S-二-对甲苯甲酰基酒石酸盐表明,分解的胺具有(-)-1的特征2R,4S绝对立体化学。使用特定的放射性配体[3H]-(2SR,4RS)-4-(膦酰基甲基)哌啶-2-羧酸([3H] CGS 19755; IC50 = 67 +/- 6 nM)确定对NMDA受体的亲和力使用皮质切片制剂(IC50对40