[F:1][C:2]1[CH:3]=[C:4]([C:8]2[N:13]=[N:12][C:11]([NH:14][NH2:15])=[CH:10][CH:9]=2)[CH:5]=[CH:6][CH:7]=1.[CH3:16][O:17][CH2:18][C:19](Cl)=O>>[F:1][C:2]1[CH:3]=[C:4]([C:8]2[CH:9]=[CH:10][C:11]3[N:12]([C:19]([CH2:18][O:17][CH3:16])=[N:15][N:14]=3)[N:13]=2)[CH:5]=[CH:6][CH:7]=1As for Example 4, 6-(3-fluorophenyl)-3-hydrazinopyridazine (prepared in a manner similar to that described in Example 1) is reacted with methoxyacetyl chloride to give the product of the Example.
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