A process for preparing a novel imiddazole derivative expressed by the general formula:
where R1 and R4 represent lower alkyl groups, and R2 and R3 lower alkylene groups. The process proceeds as follows:
where R1, R2, R3 and R4 are as defined above, and where X1 represents a halogen, a mercapto group, a nitrogen-containing 5-membered aromatic-heterocyclic-n-yl group or a expressed by the formula-S(O)n-Z (where z denotes a hydroxy group or alkyl group and n is 1 or 2), X2 represents a halogen, a mercapto group, a cyanamide group or a group expressed by the formula -S(O)n-Z, and X3 represents a halogen or a group expressed by the formula -S(O)n-Z. (1) exhibits histamine H2 antagonism and is useful as a medicine for treating ulcers.
一种由通式表示的新型
咪唑衍
生物的制备方法:
其中 R1 和 R4 代表低级烷基,R2 和 R3 代表低级亚烷基。该工艺流程如下:
其中 R1、R2、R3 和 R4 如上定义,X1 代表卤素、巯基、含氮 5 元芳香族-杂环-n-基团或由式-S(O)n-Z 表示的基团(其中 z 表示羟基或烷基,n 为 1 或 2),X2 代表卤素、巯基、
氰基或由式-S(O)n-Z 表示的基团,X3 代表卤素或由式-S(O)n-Z 表示的基团。(1) 具有
组胺 H2 拮抗作用,可用作治疗溃疡的药物。