The case concerns novel pyrazinyl-1,2,4-oxadiazole-5- ones and a process for preparing the same. The compounds are useful in the treatment of edema and hypertension.
The novel compounds have the formula
wherein
R is hydrogen or lower alkyl (C1-5),
R' is hydrogen or lower alkyl (C1-5),
R and R' can be joined to form an alkylene group of from 1-4 carbon atoms, and
X is halo, cyano or phenyl.
They can be prepared by reacting an N-(cyanoaminoiminomethyl) pyrazinecarboxamide with hydroxylamine hydrochloride and treating the reaction product with hot hydrochloric acid.
本案涉及新型
吡嗪基-
1,2,4-恶二唑-5-酮及其制备方法。这些化合物可用于治疗
水肿和高血压。
这些新型化合物的
化学式为
式中
R 是氢或低级烷基(C1-5)、
R'是氢或低级烷基(C1-5)、
R 和 R' 可以连接形成 1-4 个碳原子的亚烷基,以及
X 为卤代、
氰基或苯基。
它们可以通过 N-(
氰基
氨基亚
氨基甲基)
吡嗪甲酰胺与
羟胺盐酸盐反应,并用热
盐酸处理反应产物来制备。