反应详情

500 mg (2.52 mmol) of 2,2-diphenylethanol was dissolved in 10 ml of toluene. 382 mg (3.78 mmol) of triethylamine was added to the obtained solution, and they were stirred at room temperature for 1 hour. 386 mg (3.03 mmol) of diketene was added to the obtained mixture under cooling with ice, and then they were stirred under heating at 100° C. for 2 hours. After the addition of saturated aqueous sodium hydrogencarbonate solution followed by the extraction with ethyl acetate, the organic layer was dried over anhydrous sodium sulfate and concentrated under reduced pressure to obtain the unpurified title compound.

1. temperatureunder cooling with ice
2. stirringthey were stirred
3. temperatureunder heating at 100° C. for 2 hours
4. extractionfollowed by the extraction with ethyl acetate
5. dry with materialthe organic layer was dried over anhydrous sodium sulfate
6. concentrationconcentrated under reduced pressure