[N+:1]([C:4]1[CH:5]=[C:6]([C:13]([OH:15])=[O:14])[C:7](=[CH:11][CH:12]=1)[C:8]([OH:10])=[O:9])([O-])=O>C(O)C>[NH2:1][C:4]1[CH:5]=[C:6]([C:13]([OH:15])=[O:14])[C:7](=[CH:11][CH:12]=1)[C:8]([OH:10])=[O:9]1 g (4.73 mmol) of 4-nitrophthalic acid is dissolved in 10 mL of anhydrous ethanol. The solution is stirred at room temperature and degassed under argon. 50 mg of palladium/charcoal (5%) are added in a single portion and hydrogen is bubbled into the solution. After 3 hours, the solution is filtered through Celite and then evaporated.
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