Formal Synthesis of the ACE Inhibitor Benazepril·HCl via an Asymmetric Aza-Michael Reaction
作者:Luo-Ting Yu、Ji-Ling Huang、Ching-Yao Chang、Teng-Kuei Yang
DOI:10.3390/11080641
日期:——
A formal enantioselective synthesis of benazepril·HCl (4), an anti- hypertensive drug, is reported. Our synthesis employed an asymmetric aza-Michael addition of L-homophenylalanine ethyl ester (LHPE, 1) to 4-(2-nitrophenyl)-4-oxo- but-2-enoic acid methyl ester (6) as the key step to prepare (2S,3’S)-2-(2-oxo-2,3,4,5- tetrahydro-1H-benzo[b]azepin-3-ylamino)-4-phenylbutyric acid ethyl ester (8), which is the key intermediate leading to benazepril·HCl (4).
报道了一种正式的对映选择性合成氢氯噻嗪(benazepril·HCl,4)抗高血压药物的方法。我们的合成采用了L-同苯丙氨酸乙酯(LHPE,1)与4-(2-硝基苯)-4-氧代-丁-2-烯酸甲酯(6)之间的不对称氮-迈克尔加成反应作为关键步骤,制备出(2S,3’S)-2-(2-氧代-2,3,4,5-四氢-1H-苯并[b]氮杂烯-3-基氨基)-4-苯基丁酸乙酯(8),该化合物是合成氢氯噻嗪(benazepril·HCl,4)的关键中间体。