benzaldehyde [5-chloro-6-oxo-1-(3-trifluoromethyl-phenyl)-1,6-dihydro-pyridazin-4-yl]-methyl-hydrazone 、
4-chloro-2-(3-trifluoromethylphenyl)-5-(1-methylhydrazino)-pyridazin-3(2H)-one 以there is obtained 2-(3-trifluoromethylphenyl)-5-(1-methyl-2-benzylhydrazino)-pyridazin-3(2H)-one, (m.p. 89° to 90° C)的产率得到5-(
N'-benzyl-
N-methyl-hydrazino)-2-(3-trifluoromethyl-phenyl)-2
H-pyridazin-3-one