反应详情

6.6 g (0.1 mole) of 85% potassium hydroxide and 8.9 g (0.1 mole) of morpholine are dissolved in 200 ml of water and, with cooling, 7.7 g (0.1 mole) of carbon disulfide are added. The mixture is stirred until a yellowish homogeneous solution is obtained. With cooling and stirring, 9.4 g (0.11 mole) of aqueous 35% formaldehyde and a solution of 12.7 g (0.1 mole) of 2-amino-4,6-dimethylpyrimidine and 9.7 g (0.1 mole) of methanesulfonic acid in 50 ml of water are added in succession. The reaction mixture is further stirred at room temperature, whereupon first an oil precipitates, which crystallises after a short time. After 24 hours the batch is diluted with 1 liter of water and the crystalline precipitate is filtered with suction and dried, affording 24 g (80% of theory) of the title compound with a melting point of 119°-121° C.

1. temperaturewith cooling
2. customis obtained
3. temperatureWith cooling
4. stirringstirring
5. stirringThe reaction mixture is further stirred at room temperature
6. customwhereupon first an oil precipitates
7. customwhich crystallises after a short time
8. additionAfter 24 hours the batch is diluted with 1 liter of water
9. filtrationthe crystalline precipitate is filtered with suction
10. customdried