反应详情

温度

60 °C

To a solution of 6-(3,4-dimethoxyphenyl)-3-methyl-2,4(1H,3H)-pyrimidinedione (3.0 g) in N,N-dimethylformamide (30 ml) was added sodium hydride (60% in oil, 0.5 g). The mixture was heated at 60° C. with stirring for 20 minutes and cooled to 0° C. To the mixture was added n-propyl iodide (15 ml) with stirring, which was continued at 0° C. for 2 hours and at ambient temperature for 3 hours. After addition of water, the reaction mixture was extracted with ethyl acetate. The organic extract was washed with water, dried over magnesium sulfate and evaporated under reduced pressure. The residue was triturated with diisopropyl ether and the resulting precipitates were collected by filtration to give 6-(3,4-dimethoxyphenyl)-3-methyl-2-propoxy-4(3H)-pyrimidinone (1.15 g) as by-product.

1. temperaturecooled to 0° C
2. stirringwith stirring
3. waitwhich was continued at 0° C. for 2 hours and at ambient temperature for 3 hours
4. extractionthe reaction mixture was extracted with ethyl acetate
5. extractionThe organic extract
6. washwas washed with water
7. dry with materialdried over magnesium sulfate
8. customevaporated under reduced pressure
9. customThe residue was triturated with diisopropyl ether
10. customthe resulting precipitates
11. filtrationwere collected by filtration