反应详情

温度

40 °C

To a solution of 6-amino-1-methylpyrimidine-2,4(1H,3H)-dione (13.1 g, 92.9 mmol) in DMF (200 mL) was added 1,1-dimethoxy-N,N-dimethylmethanamine (13 mL, 97.9 mmol) and the mixture was stirred at 40° C. for 3 h. Then 1-(chloromethyl)-4-methoxybenzene (15.05 mL, 111.5 mmol) was added followed by potassium carbonate (25.64 g, 0.186 mmol) and DMF (100 mL), the resulting mixture was stirred at 80° C. for 48 h. The reaction was cooled and diluted with ethyl acetate. The organic phase was washed with brine, dried and concentrated to give a crude product which was purified by silica gel chromatography eluting with methanol/DCM (1:80 to 1:20) to give (E)-N′-(1-(4-methoxybenzyl)-3-methyl-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-yl)-N,N-dimethylformimidamide (7.8 g, 26.5% yield) as yellow solid. LCMS retention time 1.023 min; LCMS MH+ 317.

1. stirringthe resulting mixture was stirred at 80° C. for 48 h
2. temperatureThe reaction was cooled
3. washThe organic phase was washed with brine
4. customdried
5. concentrationconcentrated
6. customto give a crude product which
7. customwas purified by silica gel chromatography
8. washeluting with methanol/DCM (1:80 to 1:20)