申请人:Nippon Chemiphar Co., Ltd.
公开号:US04528194A1
公开(公告)日:1985-07-09
A piperazine derivative of the formula: ##STR1## wherein R.sup.1 is a hydrogen atom or a lower alkyl group; R.sup.2 is a hydroxyl group, an aralkyloxy group, a lower alkoxy group containing 1-5 carbon atoms or a lower alkenyloxy group containing 3-5 carbon atoms; R.sup.3 is a hydrogen atom, or an aralkyloxy group, a lower alkoxy group containing 1-5 carbon atoms or a lower alkenyloxy group containing 3-5 carbon atoms; and R.sup.4 is a hydrogen atom or a lower alkoxy group containing 1-5 carbon atoms, provided that R.sup.2 is a group other than the lower alkoxy group containing 1-5 carbon atoms when both R.sup.3 and R.sup.4 are hydrogen atoms; or a pharmaceutically acceptable salt is effectively useful as a cerebral circulation-improving agent.
该化合物是吡哌啶衍生物,化学式为:##STR1##其中R.sup.1是氢原子或较低的烷基基团;R.sup.2是羟基、芳基氧基、含有1-5个碳原子的较低烷氧基或含有3-5个碳原子的较低烯氧基;R.sup.3是氢原子、芳基氧基、含有1-5个碳原子的较低烷氧基或含有3-5个碳原子的较低烯氧基;R.sup.4是氢原子或含有1-5个碳原子的较低烷氧基,但当R.sup.3和R.sup.4都是氢原子时,R.sup.2不能是含有1-5个碳原子的较低烷氧基;或其药用盐作为一种有效的脑循环改善剂。