New nonpeptide angiotensin II receptor antagonists. 1. Synthesis, biological properties and structure-activity relationships of 2-alkylbenzimidazole derivatives
摘要:
On the basis of an extension of the literature lead 1, a series of benzimidazoles have been synthesized and shown to be angiotensin II (AII) receptor antagonists. The structure-activity relationships of these new antagonists have been explored and the key binding interactions defined. Molecular mechanics calculations were carried out on analogues of imidazole AII antagonists and conformationally restricted analogues were synthesized. The benzimidazole antagonists displaced AII in binding studies in vitro with IC50 values in the range 10(-5)-10(-7) M and antagonized the hypertensive effects of AII in vivo (rats) following intravenous administration with ED50 values in the range of 5-20 mg/kg.
Novel imidazoles of the formula ##STR1## and their non-toxic, pharmaceutically acceptable salts with acids and bases having an antagonistic activity against angiotensin II receptors.
The invention concerns heterocyclic compounds of the formula I
(and their physiologically acceptable salts), together with pharmaceutical compositions containing them. The heterocyclic compounds antagonise the actions of angiotensin II and are of value in treating diseases or medical conditions such as hypertension and congestive heart failure in warm-blooded animals. The invention further includes processes for the manufacture of the compounds and their use in medical treatment.
本发明涉及式 I 的杂环化合物(及其生理上可接受的盐类)以及含有它们的药物组合物。
(及其生理上可接受的盐)以及含有它们的药物组合物。这些杂环化合物能拮抗血管紧张素 II 的作用,对治疗温血动物的高血压和充血性心力衰竭等疾病或病症具有重要价值。本发明还包括化合物的制造工艺及其在医疗中的应用。