Acetic Acid → 4-Methoxy-2-nitrobenzoic acid

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A mixture of 2-nitro-4-methoxybenzonitrile (14.0 g, 78.6 mM) in a solution of acetic acid (28 mL), sulfuric acid (28 mL) and water (28 mL) was refluxed for 11 hr, allowed to cool and diluted with water (200 mL). The resulting precipitate which formed was collected, washed with water and dried to give the title benzoic acid (14.2 g, 91.8%) as a yellow crystalline solid; MS(CI): 198 (M+H).

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