申请人:Akzo, N.V.
公开号:US04952571A1
公开(公告)日:1990-08-28
The invention relates to pyridazinone compounds of the general formula I: ##STR1## wherein R.sup.1 represents one to four substituents, which may be the same or different and are selected from H, OH, halogen, NO.sub.2, unsubstituted or C1-C4 alkyl substituted amino, C1-C4 alkyl, C1-C4 halogen substituted alkyl, O--ALK--NR.sup.4 R.sup.5, C1-C4 alkoxy, whereby two substituents taken together may also represent a methylenedioxy group; R.sup.2 and R.sup.3 represent independently H or C1-C4 alkyl; R.sup.4 and R.sup.5 represent independently H or C1-C4 alkyl, or form together with the nitrogen a 5- or 6- membered ring; X represents S or O; the dotted line represents an optional bond; and their pharmaceutically acceptable salts. The compounds according to the invention have a cardiotonic, blood platelet aggregation inhibiting, systemic vasodilator, pulmonary vasodilator, and bronchodilator activity, and more particularly they show a very potent increase of the force of the muscular contractions of the heart, reduce afterload on the heart, improve pulmonary blood flow, and improve airways ventilation.
本发明涉及一般式I的吡啶并咪唑酮化合物:##STR1## 其中R.sup.1代表一个到四个取代基,可以相同或不同,并且选择自H、OH、卤素、NO.sub.2、未取代或C1-C4烷基取代的氨基、C1-C4烷基、C1-C4卤素取代的烷基、O-ALK-NR.sup.4 R.sup.5、C1-C4烷氧基,其中两个取代基在一起也可以代表一个亚甲二氧基基团;R.sup.2和R.sup.3分别代表H或C1-C4烷基;R.sup.4和R.sup.5分别代表H或C1-C4烷基,或者与氮一起形成一个5-或6-成员环;X代表S或O;虚线表示可选键;以及它们的药学上可接受的盐。根据本发明的化合物具有心脏强心、抑制血小板聚集、系统血管扩张、肺血管扩张和支气管扩张活性,特别是它们显示出非常强的增加心肌收缩力、减少心脏的后负荷、改善肺血流和改善气道通气的作用。