This invention relates to novel S-protected derivatives of an orally active inhibitor of an angiotensin-converting enzyme (ACE) and its analogues, which derivatives are useful for the reasons that they are (1) easily prepared from novel precursors, (2) resolvable to their optically purified stereoisomeric species and (3) convertible to non-derivatized stereoisomeric species which correspond to the pharmacologically active inhibitor and its analogues. Consequently, this invention also relates to the novel precursors. Novel methods for preparing the derivatives and their precursors are also noted herein. In addition, methods for converting the derivatives to the resolved de-derivatized stereoisomeric species of the ACE inhibitor and its analogues are described.
本发明涉及一种口服的
血管紧张素转化酶(ACE)
抑制剂及其类似物的新型S-保护衍
生物,这些衍
生物有以下优点:(1)易于从新型前体制备,(2)可分离其光学纯异构体,(3)可转化为对应于药理活性
抑制剂及其类似物的非衍生立体异构体。因此,本发明还涉及新型前体,以及制备这些衍
生物和前体的新方法。此外,还描述了将这些衍
生物转化为已分离去衍生的ACE
抑制剂及其类似物立体异构体的方法。