3-Aminobenzamide → 2-(3-Carbamoylphenylamino)-2-(3,4-dimethoxyphenyl)acetic acid

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A mixture of 3-aminobenzamide (204 mg, 1.5 mmol), 3,4-dimethoxyphenylboronic acid (273 mg, 1.5 mmol) and glyoxylic acid monohydrate (138 mg, 1.5 mmol) in acetonitrile (8.0 mL) and DMF (0.8 mL) was heated at 55° C. for 4.0 h and then stirred at rt for 18 h. The precipitate formed was collected by filtration and washed with ethyl acetate to give 1A (390 mg, 78% yield) after drying. 1H NMR (400 MHz, DMSO-d6) δ ppm 7.03-7.19 (m, 5H) 6.91 (d, J=9.0 Hz, 1H) 6.81 (d, J=8.00 Hz, 1H) 5.05 (s, 1H) 3.83 (s, 3H) 3.72 (s, 3H). LC-MS 331 (M+H).

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