Ammonia → Ethyl 2-amino-4-(propylamino)pyrimidine-5-carboxylate

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Reaction Steps

To a solution of 2-(methylthio)-4-(propylamino)pyrimidine-5-carboxylic acid ethyl ester (A1, 11.7 g) in N-methylpyrrolidone (90 mL), meta-chloroperbenzoic acid (70 to 75% wt, 20.8 g) was added under ice cooling, and the mixture was stirred at room temperature for 40 minutes. To the reaction mixture, N,N-diisopropylethylamine (23.9 mL) and 10% aqueous ammonia (60.0 mL) were added at room temperature, and the mixture was stirred at the same temperature for 1 hour. The reaction mixture was poured into water (400 mL). The solid matter was taken by filtration, washed with water, and then dried under reduced pressure to obtain ethyl 2-amino-4-(propylamino)pyrimidine-5-carboxylate (C3, 8.0 g).

Provenance & Evidence