New pyrimidine derivatives of the formula: ##STR1## wherein Z is a group selected from ##STR2## in which R.sup.1 and R.sup.2 are each hydrogen, alkenyl, ar(lower)alkyl or lower alkyl optionally substituted with epoxy, hydroxy, amino and/or lower alkylamino and R.sup.5 is lower alkyl, R.sup.3 is hydrogen, aryl optionally substituted with lower alkyl, lower alkoxy and/or halogen, or pyridyl optionally substituted with lower alkyl, R.sup.4 is hydrogen, lower alkyl or phenyl optionally substituted with lower alkoxy, and Y is .dbd.O, .dbd.S or .dbd.N--R.sup.6, in which R.sup.6 is lower alkyl; cyclo(lower)alkyl; ar(lower)alkyl optionally substituted with lower alkoxy; N-containing unsaturated heterocyclic group optionally substituted with lower alkyl; or aryl optionally substituted with hydroxy, lower alkyl, halogen or lower alkoxy, in which lower alkoxy substituent may be substituted with epoxy, hydroxy, amino and/or lower alkylamino, provided that Y is .dbd.N--R.sup.6 when R.sup.3 and R.sup.4 are each hydrogen, and Y is .dbd.S or .dbd.N--R.sup.6 when R.sup.1 and R.sup.2 are each hydrogen or lower alkyl and R.sup.3 is phenyl, and pharmaceutically acceptable salts thereof, and processes for preparation thereof and pharmaceutical composition comprising the same. These derivatives and salts thereof are useful as cardiotonic, antihypertensive agent, cerebrovascular vasodilator and anti-platelet agent.
新的
嘧啶衍
生物的
化学式如下:##
STR1## 其中Z是从##
STR2##中选择的一组基团,其中R.sup.1和R.sup.2分别是
氢,
烯基,ar(较低)烷基或较低烷基,可选择地被环
氧,羟基,
氨基和/或较低烷基
氨基取代,而R.sup.5是较低烷基,R.sup.3是
氢,芳基,可选择地被较低烷基,较低烷
氧基和/或卤素取代,或
吡啶基,可选择地被较低烷基取代,R.sup.4是
氢,较低烷基或
苯基,可选择地被较低烷
氧基取代,而Y是.dbd.O,.dbd.S或.dbd.N--R.sup.6,其中R.sup.6是较低烷基;环(较低)烷基;芳基,可选择地被较低烷
氧基取代;含N的不饱和杂环基团,可选择地被较低烷基取代;或芳基,可选择地被羟基,较低烷基,卤素或较低烷
氧基取代,其中较低烷
氧基取代基团可被环
氧,羟基,
氨基和/或较低烷基
氨基取代,前提是当R.sup.3和R.sup.4分别是
氢时,Y是.dbd.N--R.sup.6,而当R.sup.1和R.sup.2分别是
氢或较低烷基且R.sup.3是
苯基时,Y是.dbd.S或.dbd.N--R.sup.6,以及其药学上可接受的盐,以及制备它们的过程和包含它们的制药组合物。这些衍
生物及其盐可用作心脏强心剂,降压剂,脑血管扩张剂和抗血小板剂。