Pyrrolotriazolopyrimidine derivatives having the formula ##STR1## wherein R.sup.1 represents hydrogen atom or an alkyl group having from 1 to 4 carbon atoms and R.sup.2 represents an alkyl group having from 1 to 4 carbon atoms, a cycloalkyl group having from 5 to 8 carbon atoms, a phenyl group optionally substituted with one or more halogen atoms or a phenylalkyl group having the formula ##STR2## IN WHICH R.sup.3 represents hydrogen atom or an alkyl group having from 1 to 4 carbon atoms, R.sup.4 represents halogen atom, an alkyl group having from 1 to 4 carbon atoms or an alkoxy group having from 1 to 4 carbon atoms, m represents an integer from 0 to 2 and n represents an integer from 0 to 3, and pharmacologically acceptable salts thereof. The compounds are useful as vasodilating or hypotensive agents and may be prepared by reacting triazolopyrimidine derivatives having the formula ##STR3## wherein X.sup.1 and X.sup.2 may be the same or different and each represents a halogen atom and R.sup.1 has the same meaning as defined above with an amine having the formula R.sup.2 - NH.sub.2 wherein R.sup.2 has the same meaning as defined above.
具有以下式子的
吡咯三唑
嘧啶衍
生物:##STR1## 其中R.sup.1代表氢原子或具有1至4个碳原子的烷基基团,R.sup.2代表具有1至4个碳原子的烷基基团,具有5至8个碳原子的环烷基团,或者是苯基,该苯基可以被一个或多个卤素原子取代,或者是具有以下式子的苯基烷基团:##STR2## 其中R.sup.3代表氢原子或具有1至4个碳原子的烷基基团,R.sup.4代表卤素原子,具有1至4个碳原子的烷基基团或具有1至4个碳原子的烷氧基团,m代表从0到2的整数,n代表从0到3的整数,以及其药学上可接受的盐。这些化合物可用作扩血管或降压剂,并可以通过将具有以下式子的三唑
嘧啶衍
生物与具有以下式子的胺反应而制备出来:##STR3## 其中X.sup.1和X.sup.2可以相同或不同,每个代表卤素原子,而R.sup.1具有上述定义的相同含义。