Sodium Methoxide → 2-Methoxy-6-[2-(4-methoxy-phenyl)-ethylamino]-pyrimidine-4-carboxylic acid

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A mixture of 2-chloro-6-[2-(4-methoxy-phenyl)-ethylamino]-pyrimidine-4-carboxylic acid methyl ester [650 mg, 2.02 mmol, Intermediate (55)] 5M sodium methoxide in MeOH (20 mL, 10.1 mmol), in MeOH (10 mL) is heated to reflux and stirred for 5 hours. The heating is turned off and the mixture is stirred for 15 hours at room temperature and concentrated by rotary evaporator to remove the solvent. The solid is dissolved in water and the solution is acidified to pH 2 with the addition of 1N hydrochloric acid. Extracted three times with 75 mL EtOAc and concentrated the combined organic extracts to afford 2-methoxy-6-[2-(4-methoxy-phenyl)-ethylamino]-pyrimidine-4-carboxylic acid [390 mg, 64%, Intermediate (56)] as a solid. LCMS: RT=1.99 minutes, MS: 304 (M+H).

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