申请人:Warner-Lambert Company
公开号:US04717730A1
公开(公告)日:1988-01-05
A novel method of producing 4,5-dihydro-6-(substituted)phenyl-5-methyl-3(2H)-pyridazinone compounds and the corresponding pharmaceutically acceptable salt compounds is provided as well as pharmaceutical compositions containing one or more of the compounds as active components of the compositions for their pharmacological activity, particularly their cardiotonic and/or antihypertensive activity. Said 5-methylpyridazinone compounds have greatly improved cardiotonic activity in vivo that causes, for example, a significant increase in myocardial contractility in the dog. Said compounds also cause a decrease in blood pressure in the spontaneously hypertensive rat. Said compounds are produced by a stepwise procedure in which one reacts a substituted morpholineacetonitrile with crotononitrile to obtain the corresponding 4-(substituted)-.beta.-methyl.gamma.-oxobenzenebutanoic acid and reacts the latter acid with hydrazine to provide the 4,5-dihydro-6-(substituted)phenyl-5-methyl-3(2 ,uns/H/ )-pyridazinone product.
提供一种生产4,5-二氢-6-(取代)苯基-5-甲基-3(2H)-吡啶酮化合物及相应的药用可接受的盐化合物的新颖方法,以及含有其中一种或多种化合物作为药物活性成分的药物组合物,用于其药理活性,特别是它们的强心和/或降压活性。所述的5-甲基吡啶酮化合物在体内具有极大改善的强心活性,例如,在狗中引起心肌收缩力显著增加。所述化合物还导致自发性高血压大鼠的血压降低。所述化合物通过逐步程序生产,其中将取代吗啉乙腈与丁烯腈反应,以获得相应的4-(取代)-β-甲基-γ-氧基苯丁酸,并将后者酸与肼反应以提供4,5-二氢-6-(取代)苯基-5-甲基-3(2H)-吡啶酮产物。