6-Aryl-3[2H]pyridazinones of the formula I ##STR1## wherein one of the substituents R1 or R2 denotes methoxy and the other denotes (C2-C5)alkoxy or (C3-C5)alkenyloxy and X denotes oxygen or sulfur, and their pharmacologically acceptable salts with bases, are suitable for use as a bronchospasmolytic or cardiotonic agent. Processes for the preparation of the compounds and appropriate medicaments are described.
公式I的6-芳基-3[2H]
吡啶并嗪酮,其中取代基R1或R2中一个表示甲氧基,另一个表示(C2-C5)烷氧基或(C3-C5)烯氧基,X表示氧或
硫,以及它们与碱形成的药理学上可接受的盐,适用于用作支气管痉挛解除剂或心力衰竭药物。描述了制备这些化合物和适当药物的过程。