O.[NH2:2]N.C[N:5](/[CH:7]=[N:8]/[C:9](=O)[C:10]1[CH:15]=[CH:14][C:13]([CH3:16])=[C:12]([I:17])[CH:11]=1)C>C(O)(=O)C>[I:17][C:12]1[CH:11]=[C:10]([C:9]2[NH:8][CH:7]=[N:5][N:2]=2)[CH:15]=[CH:14][C:13]=1[CH3:16]Hydrazine monohydrate (0.30 g, 6.0 mmol) was added to a stirred solution of (E)-N-((dimethylamino)methylene)-3-iodo-4-methylbenzamide (preparation 48b, 1.20 g, 3.8 mmol) in acetic acid (6 mL) and the mixture was stirred and heated to 90° C. After 2 hours, the mixture was concentrated in vacuo and water and 2N aqueous sodium hydroxide solution were added to the residue. The solid that formed was filtered, washed with water and dried in vacuo to give the title compound (0.98 g, 91%) as a solid.
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