6-phenyl-1,2,4-triazine-3,5(2h,4h)-dione → HCID 22313051, compound

Participants

Reaction Conditions

Reaction Steps

To a stirring suspension of 6-phenyl-1,2,4-triazine-3,5-(2H,4H)-dione (6.00 g, 31.7 mmol) in dry acetonitrile (50 mL) under nitrogen was added bis(trimethylsilyl)acetamide (15.7 mL, 63.4 mmol). The resulting yellow solution was heated at 80° C. for 3 hours. The solution was cooled and 2,6-difluorobenzyl bromide (8.20 g, 39.6 mmol) was added in one portion. The mixture was heated at 80° C. under nitrogen for an additional 15 hours. The resulting solution was cooled to room temperature, quenched with methanol (20 mL), and diluted with dichloromethane (175 mL). The mixture was washed with water (75 mL) and brine (70 mL), and dried over magnesium sulfate. Evaporation gave a tan solid that was triturated with cold diethyl ether (5×5 mL). After drying in vacuo, the compound was isolated as a flocculent, off-white solid (8.80 g, 88%).

Provenance & Evidence