Ammonium Hydroxide → 5-Pyrimidinecarboxylic acid, 4-amino-2-(methylthio)-, ethyl ester

Participants

Reaction Conditions

Reaction Steps

140 ml of a 20% NH4OH solution are added, in 20 minutes, and while maintaining the temperature at around 20° C., to a suspension of 50.7 g of ethyl 4-chloro-2-(methylthio)pyrimidin-5-carboxylate in 400 ml of EtOH. After stirring at ambient temperature for 20 hours, the reaction medium is concentrated under vacuum almost to dryness, and the residue is then taken up in 350 ml of water, stirred for 20 minutes, filtered, washed with 3×60 ml of water, and then dried under vacuum in the presence of P2O5. A white solid is obtained, Mp=134-135° C., m=39.9 g.

Provenance & Evidence