反应详情

20.6 g of methyl 2-amino-6-[(p-tolylsulphonyl)oxy]-4-pyrimidinecarbamate are suspended in 120 ml of methanol and 720 ml of methylene chloride. While stirring there are added thereto at room temperature 20.5 g of m-chloroperbenzoic acid and after 6 hours a further 16.3 g of m-chloroperbenzoic acid. The mixture is stirred overnight and subsequently treated with 1.5 l of hexane, whereby a precipitate separates. The precipitate is filtered off under suction and dried, there being obtained crude methyl 2-amino-6-[(p-tolylsulfonyl)oxy]-4-pyrimidinecarbamate-3-oxide of melting point 139°-142°.

1. additionare added
2. stirringThe mixture is stirred overnight
3. filtrationThe precipitate is filtered off under suction
4. customdried