Studies on Angiotensin Converting Enzyme Inhibitors. V. The Diastereoselective Synthesis of 2-Oxoimidazolidine Derivatives.
作者:Hitoshi KUBOTA、Ken-ichi NUNAMI、Masafumi YAMAGISHI、Sigeru NISIMOTO、Kimiaki HAYASHI
DOI:10.1248/cpb.39.1374
日期:——
A diastereoselective syntesis of imidapril (1), which is under clinical study as an antihypertensive drug based on its angiotensin converting enzyme (ACE)-inhibitory activity, was established. N-Alkylation of (2S)-2-amino-4-phenylbutyric acid ester (12) with 3-((2R)-2-methane or toluenesulfonyloxypropionyl)-2-oxoimidazolidine derivative (11) diastereoselectively proceeded in an SN2 fashion to afford tert-butyl (4S)-3-[(2S)-2-[N-[(1S)-1-ethoxycarbonyl)-3-phenylpropyl]amino]propionyl]-1-methyl-2-oxoimidazolidine-4-carboxylate (13), a precursor of 1. Alternatively, benzyl (2S)-2-[N-(1S)-1-(ethoxycarbonyl)-3-phenylpropyl]amino]propionate (15), which is the key building block of 13, was synthesized by teh same strategy. This procedure was also applied to the synthesis of enalapril.
建立了一种具有二面体选择性的imidapril(1)合成方法,该药物正在进行临床研究,作为一种基于其血管紧张素转化酶(ACE)抑制活性的抗高血压药物。将(2S)-2-amino-4-phenylbutyric acid ester(12)与3-((2R)-2-甲基或甲苯磺酰氧丙酰)-2-氧代咪唑烷衍生物(11)通过SN2方式进行N-烷基化,选择性地生成叔丁基(4S)-3-[(2S)-2-[N-[(1S)-1-乙氧基碳酰基)-3-苯基丙基]氨基]丙酰]-1-甲基-2-氧代咪唑烷-4-羧酸酯(13),该化合物是1的前体。作为替代,合成了苄基(2S)-2-[N-(1S)-1-(乙氧基碳酰基)-3-苯基丙基]氨基]丙酸酯(15),这是13的关键构件。该程序也应用于enalapril的合成。