反应详情

温度

40 °C

330 mg of potassium carbonate and 150 ml of methyl iodide are added to a solution of 500 mg of ethyl [4-(morpholin-4-yl)-6-oxo-1,6-dihydropyrimidin-2-yl]acetate (prepared in step 1c of example 1c) in 1.5 ml of dioxane. The reaction mixture is heated at 40° C. for 16 and then cooled to ambient temperature. The suspension is filtered through sintered glass and then rinsed with dioxane, and the filtrate is concentrated under reduced pressure. The residue is purified by silica column chromatography, elution being carried out with a mixture of dichloromethane, acetonitrile and methanol (98/01/01, 96/02/02, then 90/05/05 V/V/V). 200 mg of ethyl [1-methyl-4-(morpholin-4-yl)-6-oxo-1,6-dihydropyrimidin-2-yl]acetate are obtained in the form of a white solid, the characteristics of which are the following:

1. temperaturecooled to ambient temperature
2. filtrationThe suspension is filtered through sintered glass
3. washrinsed with dioxane
4. concentrationthe filtrate is concentrated under reduced pressure
5. customThe residue is purified by silica column chromatography, elution
6. additionbeing carried out with a mixture of dichloromethane, acetonitrile and methanol (98/01/01, 96/02/02