反应详情

Mel (2.23 mL, 35.72 mmol) was added to a suspension of 5-ethyl-2-thioxo-2,3-dihydro-1h-pyrano[2,3-d]pyrimidine-4,7-dione (4.0 g, 17.86 mmol) in DMF (40 mL) at room temperature. The reaction mixture was stirred at room temperature overnight. The reaction mixture was then poured into water (250 mL) and filtered through a sintered funnel. The solid residue was washed with water (2×50 mL) and dried under vacuum to give 5-ethyl-2-methylsulfanyl-3H-pyrano[2,3-d]pyrimidine-4,7-dione (4.1 g, 96%).

1. filtrationfiltered through a sintered funnel
2. washThe solid residue was washed with water (2×50 mL)
3. customdried under vacuum