[CH3:1][O:2][C:3]1[CH:9]=[CH:8][C:6]([NH2:7])=[CH:5][CH:4]=1.Cl[C:11]1[CH:19]=[CH:18][CH:17]=[CH:16][C:12]=1[C:13]([OH:15])=[O:14].C(=O)([O-])[O-].[Na+].[Na+].C>O.C(O)CO>[CH3:1][O:2][C:3]1[CH:9]=[CH:8][C:6]([NH:7][C:11]2[C:12](=[CH:16][CH:17]=[CH:18][CH:19]=2)[C:13]([OH:15])=[O:14])=[CH:5][CH:4]=1
4-Methoxyaniline (1.86 gm; 20 mmol), 2-chlorobenzoic acid (1.56 gm; 10 mmol), ethylene glycol (5 ml) and anhydrous sodium carbonate (1.1 gm; 10 mmol) were placed in a reaction vessel and stirred until effervescence ceased. Cupric chloride (100 mg; 0.75 mmol) dissolved in 2 ml of water was added to the reaction mixture which was then heated to 125° C. for 6 hours. The reaction was allowed to cool then water (30 ml) and charcoal were added. The mixture was filtered and acidified to pH 2 with conc. hydrochloric acid. The precipitate was collected by filtration, washed with water and then re-dissolved in 1M sodium hydroxide solution. Material was re-precipitated by the addition of acetic acid, filtered off, washed with aqueous acetic acid, then water and finally dried under vacuum over phosphorous pentoxide to give 1200 mg (49%) of N-(4-methoxyphenyl)anthranilic acid.
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