Novel furobenzisoxazole derivatives of the formula (I): ##STR1## (wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 which may be the same or different represent a hydrogen atom, a halogen atom, or a lower alkyl group having 1-4 carbon atoms; R.sub.5 is a hydroxymethyl group, a carboxyl group or a lower alkoxy carbonyl group having 1-3 carbon atoms; and X is a sulfur atom or a --CH.dbd.CH-- group), as well as intoxic salts thereof when R.sub.5 is a carboxyl group, and process for preparing the same are disclosed. The derivatives of formula (I) and nontoxic salts thereof have hypotensive, uricosuric and diuretic activities and hence ae useful as therapeutics for treating hyperuricemia, edema and hypertension.
公开了式(I)的新型呋苯
异噁唑衍
生物:##STR1##(其中R.sub.1,R.sub.2,R.sub.3和R.sub.4可以相同或不同,分别代表氢原子,卤原子或具有1-4个碳原子的低烷基;R.sub.5是羟甲基基团,羧基或具有1-3个碳原子的低烷氧羰基基团;X是
硫原子或--CH.dbd.CH--基团),以及当R.sub.5是羧基时的其毒性盐,以及制备它们的过程。公式(I)的衍
生物及其非毒性盐具有降压、利尿和
尿酸排泄活性,因此可用作治疗高
尿酸血症、
水肿和高血压的治疗药物。