反应详情

5-nitrouracil (10.00 g, 64 mmole) and potassium carbonate were stirred in dimethylformamide (50 mL) for 15 min. A solid formed. Iodomethane (5.3 mL, 85 mmol) was added and the flask was shaken until the solid dissolved. After the reaction mixture was stirred for 30 min., 2% NaOH (w/v) (200 mL) was added, followed by water (100 mL). The solution was washed with ethyl acetate (100 mL), and the aqueous layer was acidified to pH 3 with 1.0N HCl. A precipitate formed as the pH was lowered. After allowing the heterogeneous solution to stand for 16 hours, the product was filtered, washing with water, and air dried. The title compound was isolated in 77% yield as a yellow powder. m.p. 249°-250° C.

1. customA solid formed
2. dissolutiondissolved
3. stirringAfter the reaction mixture was stirred for 30 min.
4. washThe solution was washed with ethyl acetate (100 mL)
5. customA precipitate formed as the pH
6. filtrationthe product was filtered
7. washwashing with water, and air
8. customdried