This invention relates to amidine derivatives which are histamine H-2 antagonists and which inhibit gastric acid secretion. According to the invention there is provided a guanidine derivative of the formula I:-
in which R' is hydrogen or a 1-10C alkyl, 3-8C cycloalkyl, 4.14C cycloalkylalkyl, 3-6C alkenyl, 3-6C alkynyl, 1-6C alkanoyl, 6-10C aryl, 7-11C aralkyl or 7-11C aroyl radical, the latter three being optionally substituted; ring X is a heterocyclic ring as defined in the specification; A is phenylene or 5-7C cycloalkylene or a 1-8C alkylene chain into which is optionally inserted one or two groups; and R2 and R3 are a variety of radicals described in the specification: and the pharmaceutically-acceptabie acid-addition salts thereof. Manufacturing processes and pharmaceutical compositions are also described.
本发明涉及
组胺 H-2 拮抗剂和抑制胃酸分泌的脒衍
生物。根据本发明提供了一种式 I 的
胍衍
生物
其中 R' 是氢或 1-10C 烷基、3-8C 环烷基、4.14C环烷基、3-6C烯基、3-6C炔基、1-6C烷酰基、6-10C芳基、7-11C芳烷基或7-11C芳烷基,后三者任选被取代;环X为说明书中定义的杂环;A为亚苯基或5-7C环亚烷基或1-8C亚烷基链,其中任选插入一个或两个基团;R2和R3为说明书中描述的各种基团:及其药学上可接受的酸加成盐。还描述了制造工艺和药物组合物。