Ethanol → HCID 178507684, compound

Participants

Reaction Conditions

Reaction Steps

144.5 g. of 2,4-diamino-6-chloropyrimidine are suspended in 2000 ml. of ethanol. While stirring, the suspension is warmed to 35° C. (about 15 minutes), the greater part of the substance passing into solution. The mixture is then cooled to 6°-8° C. and, at this temperature, there are added dropwise within the course of 40 minutes 175 ml. of 40% peracetic acid in glacial acetic acid. After completion of the addition, the mixture is stirred at 6°-8° C. for a further 30 minutes. The mixture is then left to warm up to room temperature and stirred at this temperature for 3 hours. 2000 Ml. of petroleum ether are then added, the mixture is left to stir for 1 hour and then left to stand overnight. The separated precipitate is filtered off, back-washed with 200 ml. of petroleum ether and dried under reduced pressure, there being obtained 2,4-diamino-6-chloropyrimidine-3-oxide. Recrystallization yields analytically-pure product having a melting point of 193° C.

Provenance & Evidence