[CH3:1][O:2][CH:3]([O:29][CH3:30])[C:4]1[CH:23]=[CH:22][C:7]([O:8][CH2:9][CH2:10]C23C=CC=CC2C(NC3=O)=O)=[C:6]([O:24][CH3:25])[C:5]=1[N+:26]([O-:28])=[O:27].O.[NH2:32]N.O>C(O)C>[CH3:1][O:2][CH:3]([O:29][CH3:30])[C:4]1[CH:23]=[CH:22][C:7]([O:8][CH2:9][CH2:10][NH2:32])=[C:6]([O:24][CH3:25])[C:5]=1[N+:26]([O-:28])=[O:27]A solution of 2-[2-(4-dimethoxymethyl-2-methoxy-3-nitrophenoxy)ethyl]phtalimide (0.05 g, 0.12 mmol) obtained in Step 2 in ethanol (1.0 mL) was added with hydrazine monohydrate (6.4 μL, 0.13 mmol) and heated under reflux for 3 hours. The reaction mixture was cooled to room temperature and added with water, followed by extracting with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate and the solvent was evaporated under reduced pressure to obtain 2-(4-dimethoxymethyl-2-methoxy-3-nitrophenoxy)ethylamine (0.04 g, 100%).
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