反应详情

To a suspension of 6-(3,4-dimethoxyphenyl)-2,4(1H,3H)-pyrimidinedione (1.0 g) in a mixture of water (5 ml) and methanol (5 ml) was added potassium hydroxide (0.57 g), and to an almost dissolved mixture was added methyl iodide (5 ml). The mixture was stirred at ambient temperature for 18 hours. The resulting precipitates were filtered and washed successively with water, ethanol and diisopropyl ether to afford 6-(3,4-dimethoxyphenyl)-3-methyl-2,4(1H,3H)-pyrimidinedione (0.13 g).

1. customThe resulting precipitates
2. filtrationwere filtered
3. washwashed successively with water, ethanol and diisopropyl ether