2-Aminopyrimidones which are histamine H2- antagonists having the structure
in which Het is a nitrogen-containing 5- or 6-membered fully unsaturated heterocyclic group, m is 0 or 1, Y is methylene, oxygen or sulphur, n is 2 or 3, Z is hydrogen or lower aikyl, A is an alkylene group or an alkylene group interrupted by oxygen or sulphur, and B is hydrogen or a methyl, cycloalkyl, heteroaryl, phenyl, naphthyl, benzodioxolyl or dihydroben- zodioxinyl group, are prepared by a process in which an amine Het-(CH2)mY(CH2)nNH2 is reacted with a 2-nitroaminopyrimidone of structure
The new 2-nitroaminopyrimidone intermediates are prepared by reacting nitroguanidine with an oxoester RO2C-CH(COZ)-A-B where R is lower alkyl.
2-
氨基嘧啶酮是
组胺 H2- 拮抗剂,其结构如下
其中 Het 是含氮的 5 或 6 元完全不饱和杂环基团,m 是 0 或 1,Y 是亚甲基、氧或
硫,n 是 2 或 3,Z 是氢或低级烷基,A 是亚烷基或被氧或
硫打断的亚烷基、通过胺 Het-(
CH2)mY( )nNH2 与结构式为 2-硝基
氨基嘧啶酮反应的工艺制备新的 2-硝基
氨基嘧啶酮,其结构式为: Het-( )mY( )nNH2、Het-( )mY( )nNH2 和 Het-( )mY( )nNH2。
新的 2-硝基
氨基嘧啶酮中间体是通过
硝基胍与氧化酯 RO2C-CH(COZ)-A-B(其中 R 为低级烷基)反应制备的。