Coumarin → HCID 23054125, compound

Participants

Reaction Steps

To 80 ml of acetic anhydride was suspended 7.3 g (0.05 mol) of coumarin and 16.1 g (0.05 mol) of iodobenzene diacetate, and 10 g (0.1 mol) of concentrated sulfuric acid was added dropwise thereto at 0 to 7° C. for 1 hour, followed by gradually warming to room temperature and reacting with stirring for 8 hours. After completion of the reaction, the reaction solution was poured in 200 ml of ice water, and 150 ml of dichloromethane was added thereto to dissolve insolble substance. Then 18.4 g (0.1 mol) of potassium hexafluorophosphate was added to the obtained solution, followed by stirring at room temperature for 2 hours. The dichloromethane layer obtained by fractionation was washed with 100 ml of water twice. The obtained dichloromethane layer was semi concentrated under reduced pressure and the precipitated crystal was filtered off, followed by drying under vacuum at 50° C. for 2 hours to obtain 2.4 g of objective substance as pale yellow crystal (yield: 10%).

Provenance & Evidence