arylhydrazones 2a,b by conventional and by microwave heating techniques furnished the corresponding pyridazines 3a-e. The arylhydrazones 7a,b were allowed to react with 1a,b under the same conditions to produce the pyridazinones 10a,b and iminopyridazines 11a,b respectively. On the other hand, the arylhydrazones 12a-c reacted with 1a to afford the pyridazinones 13a-c. Treatment of 3b with dimethylformamide