Three new ureido-pyridazinonederivatives, which are structurally related to the known STAT3 inhibitor AVS-0288, were designed by taking into account the structure–activity relationships determined for several ureido-oxadiazole derivatives previously studied by our group. Their synthesis was first attempted through suitable 5-aminopyridazinone intermediates (6a and 6b), which molecular structures were
Substituted 6-phenyl-3(2H)-pyridazinones useful as cardiotonic agents
申请人:Warner-Lambert Company
公开号:US04404203A1
公开(公告)日:1983-09-13
Substituted 6-phenyl-3(2H)-pyridazinone compounds are useful as cardiotonic agents. Said compounds cause a significant increase in myocardial contractility in the anesthetized dog. Said compounds are produced by reacting substituted benzoylpropionic acids with suitably substituted hydrazines to provide 6-phenyl-4,5-dihydro-3(2H)-pyridazinones which are dehydrogenated to the desired product. The intermediate 6-phenyl-4,5-dihydro-3(2H)-pyridazinones are themselves useful as cardiotonic agents.