A peptide optionally in isosteric form wherein a methylene group in the backbone chain is disubstituted, one or both substituents being fluorine and/or chlorine, in free form or in pharmaceutically acceptable salt form, such as a compound of formula I ##STR1## wherein the substituents have various significances, or an isosteric form thereof, is useful as an enzyme inhibitor. In particular, as a renin inhibitor, it is useful in the prophylaxis or treatment of hypertension and congestive heart failure. It is prepared by a process comprising the step of coupling two corresponding peptide residues optionally in isosteric form, or precursors thereof, and if required appropriately converting any resultant compound in precursor form.
一种肽可选地以同构形式存在,其中背骨链中的一个亚甲基基团被二取代,一个或两个取代基为
氟和/或
氯,以自由形式或制药可接受的盐形式存在,例如化合物I的公式##STR1##其中取代基具有不同的意义,或其同构形式,可用作酶
抑制剂。特别地,作为肾素
抑制剂,它在预防或治疗高血压和充血性心力衰竭方面是有用的。它是通过一种过程制备的,该过程包括耦合两个相应的肽残基,可选地以同构形式存在,或它们的前体,并在必要时适当地转化任何产生的化合物的前体形式。