4,5-DIHYDRO-3(2H)-PYRIDAZINONES,PROCESSES FOR THEIR PREPARATION AND THEIR USE

摘要

Substituted 4,5-dihydro-3(2H)-pyridazinones of the formula I in which R denotes, for example, a radical of the formula R<1> and R<2> denote, for example, hydrogen or methyl, R<3> denotes, for example, 2-methoxyethoxy, 3-pyridylmethoxy, aminocarbonylmethoxy, hydroxycarbonylmethoxy, methylthio, (2-methoxyethyl)aminocarbonylmethoxy, 3-pyridylmethyl or 5-methyl-1,3,4-oxadiazol-2-yl, R<4> denotes, for example, hydrogen have useful pharmacological properties and can therefore be used for the production of pharmacological preparations.