Pyridazines. XV. Synthesis of 6-aryl-5-amino-3(2H)-pyridazinones as potential platelet aggregation inhibitors

Several 3(2H)-pyridazinones with amino groups at the 5-position of the pyridazine nucleus have been prepared. The 6-aryl-5-halo-3(2H)-pyridazinones obtained from mucochloric and mucobromic acid lead to the corresponding 5-alkylamino-3(2H)-pyridazinones, which were tested as platelet aggregation inhibitors.