Cl[C:2]1[N:3]=[N:4][C:5]([CH3:8])=[CH:6][CH:7]=1.O.[NH2:10][NH2:11]>C(O)C>[CH3:8][C:5]1[N:4]=[N:3][C:2]([NH:10][NH2:11])=[CH:7][CH:6]=1To a suspension of 3-chloro-6-methyl-pyridazine (3 g, 23.3 mmol) in ethanol (45 mL) was added hydrazine hydrate (45 mL) and the resultant mixture was heated to reflux for 3 hrs. Most of the solvent was removed under reduced pressure and the white solid was collected by filtration and washed with ethanol. Upon drying 2.3 g of (6-methyl-pyridazin-3-yl)-hydrazine was obtained as a white crystalline solid (80% yield).
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