申请人:Imperial Chemical Industries PLC
公开号:US04683232A1
公开(公告)日:1987-07-28
Novel heterocyclic compounds of the formula: ##STR1## wherein either X is --CR.sup.1 R.sup.2 -- and Y is oxygen, sulphur or --NR.sup.3 --, wherein R.sup.1, R.sup.2 and R.sup.3, which may be the same or different, each is hydrogen or alkyl of up to 4 carbon atoms; or X is oxygen, sulphur or --NH-- and Y is --CH.sub.2 --; wherein R.sup.4 and R.sup.5, which may be the same or different, each is hydrogen, cyano, nitro, amino or hydroxy, or alkylthio of up to 4 carbon atoms, or has various other meanings defined in claim 1, provided that R.sup.4 and R.sup.5 are not both hydrogen; or wherein R.sup.4 and R.sup.5 are joined together such that with the benzene ring A they form a benzheterocyclic ring as defined in claim 1; and therein the benzene ring A may optionally bear one or more further substituents; or a salt thereof where appropriate. These compounds possess cardiotonic properties, and some of them possess peripheral vasodilator properties, and they are useful for the treatment of acute or chronic heart failure. Representative of the compounds is N,N-dimethyl-p-(5,6-dihydro-5-oxo-4H-1,3,4-thiadiazin-2-yl)benzamide. Also disclosed are processes for the manufacture of the compounds and pharmaceutical compositions containing them.
化学式为:##STR1## 的新型杂环化合物,其中X为--CR.sup.1 R.sup.2 --,Y为氧、硫或--NR.sup.3 --,其中R.sup.1、R.sup.2和R.sup.3可以相同也可以不同,分别为氢或碳数为4以下的烷基;或者X为氧、硫或--NH--,Y为--CH.sub.2 --,其中R.sup.4和R.sup.5可以相同也可以不同,分别为氢、氰基、硝基、氨基或羟基,或碳数为4以下的烷硫基,或具有权利要求1中定义的各种其他含义,但是R.sup.4和R.sup.5不同时为氢;或者R.sup.4和R.sup.5相互连接,与苯环A形成苯杂环,如权利要求1中定义的那样;其中苯环A可以选择性地带有一个或多个进一步的取代基;或其盐,如果适当的话。这些化合物具有心脏强效作用,其中一些具有周围血管扩张作用,它们可用于治疗急性或慢性心力衰竭。代表性化合物是N,N-二甲基-p-(5,6-二氢-5-氧代-4H-1,3,4-噻二唑-2-基)苯甲酰胺。还公开了制造这些化合物的方法和含有它们的制药组合物。