This invention provides a benezene-fused heterocyclic compound of the formula: ##STR1## wherein R.sup.1 is halogen, nitro, amino, hydroxy, lower alkyl, lower alkoxy substituted by carboxy or protected carboxy, acylamino which may have lower alkyl on the amino moiety, or aryloxy which may have halogen, R.sup.2 is hydrogen or halogen, X is --O-- or ##STR2## in which R.sup.3 is hydrogen, lower alkyl or acyl and A is a group of the formula: ##STR3## in which R.sup.4 is hydrogen, lower alkenyl, lower alkynyl or alkyl which may have suitable substituent(s) selected from the groups consisting of hydroxy, acyl, lower alkoxy, di(lower)alkylamino, carboxy, protected carboxy and aryl; or R.sup.1 is hydrogen or lower alkoxy, R.sup.2 is hydrogen, X is ##STR4## in which R.sub.a.sup.3 is lower alkanoyl and A is a group of the formula: ##STR5## and pharmaceutically acceptable salts thereof. This compound possesses diuretic activity, uricosuric activity and vasodilative activity and are useful as a diuretic agent, uricosuric agent and anti-hypertensive agent. The invention further relates to processes for the preparation of this compound and pharmaceutical composition comprising compound of the above formula.
本发明提供了一种苯并
杂环化合物,其
化学式为:##STR1##其中R.sup.1是卤素,硝基,
氨基,羟基,低碳基,经羧基或保护羧基取代的低碳基,可能在
氨基上具有低碳基的酰胺基,或可能在芳基上具有卤素的氧基;R.sup.2是氢或卤素;X是- O-或##STR2##其中R.sup.3是氢,低碳基或酰基,A是下列式的基团:##STR3##其中R.sup.4是氢,低烯基,低炔基或可能具有羟基,酰基,低碳基氧基,双(低)烷基
氨基,羧基,保护羧基和芳基等适当取代基团的碳基;或R.sup.1是氢或低碳基氧基,R.sup.2是氢,X是##STR4##其中R.sub.a.sup.3是低碳酰基,A是下列式的基团:##STR5##以及其药学上可接受的盐。该化合物具有利尿活性,
尿酸排泄活性和血管扩张活性,并且可用作利尿剂,
尿酸排泄剂和抗高血压药物。本发明还涉及制备该化合物的方法以及包含上述化合物的制药组合物。