A 3N-substituted 3,4-dihydropyrimidine derivative of the formula: ##STR1## wherein R.sup.1 is methyl or ethyl, R.sup.2 is methyl or ethyl, R is phenyl or substituted phenyl, X is chloro or methyl and pharmaceutically acceptable acid addition salts thereof have substantially the same strong vasodilative and Ca.sup.++ antagonistic effects as nicardipine and therefore are useful as agents for treating disorders of the cardiovascular system, for example, hypotensive agents, agents for amelioration of brain circulation and anti-angina pectoris agents. Processes for producing the above compounds economically and effectively are also disclosed.
一种3N-取代的3,4-二氢
嘧啶衍
生物,其
化学式为:##STR1## 其中R.sup.1为甲基或乙基,R.sup.2为甲基或乙基,R为苯基或取代苯基,X为
氯或甲基,以及其药学上可接受的酸盐加合物具有与
尼卡地平相同的强烈血管扩张和Ca.sup.++拮抗作用,因此可用于治疗心血管系统疾病,例如降压剂、改善脑循环的剂和抗心绞痛剂。本文还公开了经济有效地生产上述化合物的方法。