The present invention relates to a novel process for preparing cilastatin sodium salt used asa dehydropeptidase 1 inhibitor. The novel method of the present invention could prevent the formation of (E)-isomer from the preparation of intermediate for preparing cilastatin sodium, i.e., (Z)-7-chloro-2-((S)-2,2-dimethylcyclopropanecarboxarnido)-2-heptenoic acid metal salt and isolate the intermediate in situ providing simpler process with high yield and purity. Furthermore, it can provide with highly pure cilastatin sodium salt by isolating novel cilastatin amine salt and using by sodium hydroxide and cationic exchange resin. Accordingly, the method can be very useful in preparing cilastatin sodium salt with high yield and high purity.
本发明涉及一种用作脱氢肽酶1
抑制剂的
盐酸西拉斯汀的新型制备工艺。本发明的新方法可以防止从制备
盐酸西拉斯汀的中间体(Z)-7-
氯-2-((S)-2,2-二甲基环丙基羧
氨基)-
2-庚烯酸金属盐形成(E)-异构体,并在原位分离中间体,提供了高产率和纯度的简化过程。此外,通过分离新型西拉斯汀胺盐并使用
氢氧化钠和阳离子交换
树脂,可以提供高纯度的
盐酸西拉斯汀盐。因此,该方法在制备高产率和高纯度的
盐酸西拉斯汀盐方面非常有用。