As part of a search for potent and long-lasting angiotensin converting enzyme (ACE) inhibitors, various types of N-[(1S)-1-carboxy-5-(4-piperidyl)pentyl]-L-alanine derivatives (7a, 8-11) were prepared. The key synthetic intermediate, N-[(1S)-5-(1-benzyloxycarbonyl-4-piperidyl)-1-ethoxycarbonylpentyl]-L-alanine (17a), was synthesized by asymmetric reduction of the α-oxoester (13) with Lactobacillus paracasei subsp. paracasei followed by a substitution reaction with tert-butyl L-alaninate (15) and subsequent treatment with hydrogen chloride. Compounds 7a and 8-11 showed potent and long-lasting ACE-inhibitory activity in rats.
为了寻找强效、长效的
血管紧张素转换酶(ACE)
抑制剂,我们制备了各种类型的 N-[(1S)-1-羧基-5-(4-
哌啶基)戊基]-
L-丙氨酸衍
生物(7a、8-11)。关键合成中间体 N-[(1S)-5-(1-苄氧羰基-4-
哌啶基)-1-乙氧羰基戊基]-
L-丙氨酸(17a)是通过副卡氏乳杆菌亚种不对称还原α-氧代酯(13),然后与
L-丙氨酸叔丁酯(15)发生取代反应,再用
氯化氢处理而合成的。化合物 7a 和 8-11 对大鼠的 ACE 具有强效和持久的抑制活性。