- 4,5-dihydro-3(2H)-pyridazinones and their pharmacological use
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Substituted 4,5-dihydro-3(2H)-pyridazinones of the formula I STR1 wherein R, for example, denotes a radical of the formula STR2 R1 and R2, for example, denote hydrogen or methyl, R3, for example, denotes 2-methoxy-ethoxy, 3-pyridyl-methoxy, amino-carbonyl-methoxy, hydroxy-carbonyl-methoxy, methyl-thio, (2-methoxy-ethyl)-amino-carbonyl-methoxy, 3-pyridyl-methyl or 5-methyl-1,3,4-oxadiazol-2-yl and R4, for example, denotes hydrogen, have useful pharmacological properties and can therefore be used for the preparation of pharmacological products.
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