申请人:Imperial Chemical Industries PLC
公开号:US04795755A1
公开(公告)日:1989-01-03
This invention relates to heterocyclic 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: ##STR1## in which R.sup.1 and R.sup.2, same or different, are hydrogen or 1-10C alkyl, 3-8C cycloalkyl, 4-14C cycloalkylalkyl, each alkyl, cycloalkyl or cycloalkylalkyl optionally carrying one or more F, Cl or Br atoms, provided that one of R.sup.1 and R.sup.2 is halogen-substituted, or R.sup.2 is hydrogen and R.sup.1 is R.sup.5 -E-W- in which W is 2-6 alkylene optionally substituted by 1 or 2 1-4C alkyls, E is O,S,SO,SO.sub.2 or NR.sup.6 in which R.sup.6 is H or 1-6C alkyl, R.sup.5 is H or 1-6C alkyl optionally substituted by 1 or 2 1-4C alkyls, or R.sup.5 and R.sup.6 are joined to form a pyrrolidine, piperidine, morpholine, piperazine or N-methylpiperazine ring; ring X is a heterocyclic ring as defined in the specification; A is phenylene or 5-7C cycloalkylene, or a 1-8C alkylene into which is optionally inserted one or two groups; and R.sup.3 and R.sup.4 are a variety of radicals described in the specification: and the pharmaceutically-acceptable acid-addition salts thereof. Manufacturing processes and pharmaceutical compositions are also described.
本发明涉及异噁唑衍生物,它们是组胺H-2拮抗剂,能抑制胃酸分泌。根据本发明,提供了一种式I的胍基衍生物:##STR1## 其中R.sup.1和R.sup.2,相同或不同,为氢或1-10C烷基,3-8C环烷基,4-14C环烷基烷基,每个烷基、环烷基或环烷基烷基可选地携带一个或多个F、Cl或Br原子,前提是R.sup.1和R.sup.2中的一个是卤素取代的,或者R.sup.2是氢而R.sup.1是R.sup.5-E-W-,其中W是2-6烷基烯,可选地被1或2个1-4C烷基取代,E是O、S、SO、SO.sub.2或NR.sup.6,其中R.sup.6是H或1-6C烷基,R.sup.5是H或1-6C烷基,可选地被1或2个1-4C烷基取代,或者R.sup.5和R.sup.6连接形成吡咯烷、哌啶、吗啉、哌嗪或N-甲基哌嗪环;环X是规范中定义的杂环;A是苯基或5-7C环烷基,或者一个可选地插入一到两个基团的1-8C烷基;R.sup.3和R.sup.4是规范中描述的各种基团;以及其药用可接受的酸盐。还描述了制造工艺和药物组合物。