申请人:Imperial Chemical Industries PLC
公开号:US04423045A1
公开(公告)日:1983-12-27
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.
新颖的杂环化合物的化学式如下: ##STR1## 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可能相同也可能不同,每个都是氢或碳原子数最多为4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可能相同也可能不同,每个都是氢、氰基、硝基、氨基或羟基,或碳原子数最多为4的烷硫基,或在权利要求1中定义的其他含义,前提是R.sup.4和R.sup.5不都是氢;或者R.sup.4和R.sup.5结合在一起,使得它们与苯环A形成权利要求1中定义的苯杂环环;其中苯环A可能选择性地带有一个或多个进一步的取代基;或者在适当的情况下其盐。这些化合物具有强心作用,其中一些具有外周血管扩张作用,它们可用于治疗急性或慢性心力衰竭。该化合物的代表是N,N-二甲基-p-(5,6-二氢-5-氧代-4H-1,3,4-噻二嗪-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药物组合物。