4(And 5)-cyclopropylamino-5(and 4)halo-3(2H)pyridazinones. Formation and characterization of isomers

The reactions of 4,5-dihalo-3(2H)pyridazinones with ammonia and amines gave mixtures of 5-amino-4-halo- and 4-amino-5-halo-3(2H)pyridazinones separated by chromatography. Structures were elucidated by means of retention values (R_f) and confirmed by independent synthesis.