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.
本发明涉及一种新型呋苯异嗪衍
生物,其
化学式如下:(I) ##STR1##(其中R.sub.1,R.sub.2,R.sub.3和R.sub.4可能相同或不同,代表氢原子,卤原子或具有1-4个碳原子的较低烷基基团; R.sub.5是羟甲基基团,羧基或具有1-3个碳原子的较低烷氧羰基基团; X是
硫原子或--CH.dbd.CH--基团),以及当R.sub.5为羧基时的其盐类,以及其制备方法。化合物(I)及其无毒盐具有降压、利尿和
尿酸排泄作用,因此可用作治疗高
尿酸血症、
水肿和高血压的药物。