[C:1]([C:3]1[C:8]2[CH2:9][C:10](=O)[C:11]3[CH:17]=[C:16]([O:18][CH3:19])[CH:15]=[CH:14][C:12]=3[S:13][C:7]=2[CH:6]=[CH:5][CH:4]=1)#[N:2].O.[NH2:22][NH2:23]>C(O)C.O1CCOCC1>[C:1]([C:3]1[C:8]2[CH2:9][C:10](=[N:22][NH2:23])[C:11]3[CH:17]=[C:16]([O:18][CH3:19])[CH:15]=[CH:14][C:12]=3[S:13][C:7]=2[CH:6]=[CH:5][CH:4]=1)#[N:2]900 mg of 9-cyano-2-methoxy-10,11-dihydro-11-oxo-dibenzo[b,f]thiepin was dissolved in the mixed solvent of 8 ml of ethanol and 8 ml of dioxane. To this was added 1.0 g of 100% hydrazine hydrate and the resulting mixture was refluxed with stirring for 7.5 hours. After the completion of reaction, the solvent was distilled off to obtain the residue, which was washed with a small amount of ethanol, and there was obtained 750 mg of 9-cyano-2-methoxy-10,11-dihydro-11-oxo-dibenzo[b,f]thiepin hydrazone as colorless needles having a melting point of 186°-187° C.
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