反应详情

温度

50 °C

Benzyl (3,5-bis-trifluoromethyl-benzyl)-(5-hydroxy-pyrimidin-2-yl)-carbamate (9.70 g) and ethyl 4-bromobutyrate (3.53 g) are dissolved in N,N-dimethylformamide (50 mL) and thereto is added potassium carbonate (3.41 g) and the mixture is stirred at 50° C. for 1 hour. Thereto are added ethyl acetate and a saturated brine, and the mixture is separated, and the organic layer is washed with a saturated brine, dried over magnesium sulfate, and concentrated under reduced pressure. The resulting residue is purified by silica gel column chromatography (hexane:ethyl acetate=4:1→1:1) to give ethyl 4-{2-[benzyloxycarbonyl-(3,5-bis-trifluoromethyl-benzyl)-amino]-pyrimidin-5-yloxy}-butyrate (8.29 g). MS (m/z): 586 [M+H]+

1. customa saturated brine, and the mixture is separated
2. washthe organic layer is washed with a saturated brine
3. dry with materialdried over magnesium sulfate
4. concentrationconcentrated under reduced pressure
5. customThe resulting residue is purified by silica gel column chromatography (hexane:ethyl acetate=4:1→1:1)