申请人:Takeda Chemical Industries, Ltd.
公开号:US03998822A1
公开(公告)日:1976-12-21
Pyrido (3,4-d) pyridazine derivatives are provided herein of the formula: ##STR1## wherein R.sub.1 is hydrogen or an alkyl group of 1 to 4 carbon atoms; R.sub.2 is a substituted or unsubstituted phenyl, naphthyl, furyl or pyridyl, the number of the substituents being one of two, the substituents being those selected from the group consisting of lower alkoxy groups of 1 to 3 carbon atoms, lower alkyl groups of 1 to 3 carbon atoms, halogens and nitros; R.sub.3 is hydrogen or a lower alkoxy group of 1 to 4 carbon atoms; and R.sub.4 is a substituted or unsubstituted morpholino, piperidino or pyrrolidino, the substituents being one or two, the substituents being those selected from the group consisting of methyl and ethyl groups, and at least one of the residue R.sub.2 and the residue R.sub.4 is substituted by one or two substituents, and a pharmaceutically acceptable salt thereof. The compounds of the present disclosure have effective and strong diuretic action and exhibit low toxicity characteristics.
本文提供式为:##STR1## 的吡啶并[3,4-d]吡嗪衍生物,其中R.sub.1为氢原子或1至4个碳原子的烷基;R.sub.2为取代或未取代的苯基、萘基、呋喃基或吡啶基,取代基的数目为一或二,所述取代基选自由1至3个碳原子的低级烷氧基、1至3个碳原子的低级烷基、卤素和亚硝基的群;R.sub.3为氢原子或1至4个碳原子的低级烷氧基;R.sub.4为取代或未取代的吗啉基、哌啶基或吡咯烷基,取代基的数目为一或二,所述取代基选自甲基和乙基基团,且至少有残基R.sub.2和残基R.sub.4中的一个或两个取代为一或两个取代基,以及其药学上可接受的盐。本公开的化合物具有有效和强烈的利尿作用,并表现出低毒性特征。