In order to improve the potency and duration of biological actions of diltiazem, a number of 1, 5-benzothiazepine derivatives having the substituents at the 8 position were prepared and evaluated for their antihypertensive activity in spontaneously hypertensive rats. The introduction of methyl, ethyl, isopropyl, benzyl, methoxy, ethoxy, phenoxy, and methylthio groups increased the antihypertensive activity and prolonged duration of action, whereas cyclohexyl, cyclopentoxy, tolyloxy, p-methoxyphenoxy and phenylthio derivatives were less active than diltiazem. Among them, the 8-benzyl and phenoxy derivatives showed the most potent and long-lasting antihypertensive action.
为了改善
地尔硫卓的药效和
生物作用持续时间,我们制备了一些在 8 位上具有取代基的 1,5-苯并
硫氮杂卓衍
生物,并对其在自发性高血压大鼠体内的抗高血压活性进行了评估。甲基、乙基、异丙基、苄基、甲氧基、乙氧基、苯氧基和甲
硫基的引入增加了抗高血压活性并延长了作用时间,而环己基、环戊基、
甲苯基、对
甲氧基苯氧基和苯
硫基衍
生物的活性低于
地尔硫卓。其中,8-苄基和苯氧基衍
生物的降压作用最强且持续时间最长。