[CH:1]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH:4]=[CH:3][C:2]=1[CH2:11][O:12][C:13]1[CH:14]=[C:15]([CH:20]=[C:21]([N+:23]([O-:25])=[O:24])[CH:22]=1)[C:16](OC)=[O:17].O.[NH2:27][NH2:28]>CO>[CH:1]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH:4]=[CH:3][C:2]=1[CH2:11][O:12][C:13]1[CH:14]=[C:15]([CH:20]=[C:21]([N+:23]([O-:25])=[O:24])[CH:22]=1)[C:16]([NH:27][NH2:28])=[O:17]A solution of methyl 3-[(2-naphthyl)methoxy]-5-nitrobenzoate (0.97 g, 2.87 mmol) and hydrazine hydrate (0.56 mL, 11.5 mmol) in MeOH (50 mL) was stirred under reflux overnight. Formation of solid hydrazide from a boiling mixture was observed in the morning. Mixture was cooled, solid filtered and air-dried. Greenish-white plates, yield 0.60 g (62%). 1H NMR (DMSO-d6, 400 MHz), δ: 10.15 (br.s, 1H); 8.27 (s, 1H); 8.05-7.91 (m, 6H); 7.63 (d, J=7.5 Hz, 1H); 7.59-7.52 (m, 2H); 5.48 (s, 2H); 4.66 (br.s, 2H).
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