反应详情

温度

85 °C

In a 50 ml round-bottomed flask, 680 mg of 2-fluoromethylmorpholine (Yoshikazu Jinho et al.; J. Med. Chem., 37(17), 2791-2796; 1994) and 0.63 g of (4-chloro-6-methoxypyrimidin-2-yl)acetic acid ethyl ester (example 8b, step 2b) are placed in 15 ml of DMSO and 1,013 ml of triethylamine. The reaction medium is heated for 18 h at 85° C. The reaction medium is poured into a saturated NaCl solution and the mixture is extracted with 3 times 25 ml of ethyl acetate. The organic extracts are combined and washed with a saturated NaCl solution, dried over magnesium sulfate and evaporated. The compound obtained is chromatographed on silica gel (15-40 μm, Merck), elution being carried out with a gradient of dichloromethane and methanol (98/2 to 95/5 v/v). The fractions containing the expected compound are combined and evaporated, so as to give (±)-[4-(2-fluoromethylmorpholin-4-yl)-6-oxo-1,6-dihydropyrimidin-2-yl]acetic acid ethyl ester (412 mg).

1. extractionthe mixture is extracted with 3 times 25 ml of ethyl acetate
2. washwashed with a saturated NaCl solution
3. dry with materialdried over magnesium sulfate
4. customevaporated
5. customThe compound obtained
6. customis chromatographed on silica gel (15-40 μm, Merck), elution
7. additionThe fractions containing the expected compound
8. customevaporated