反应详情

Into 50 mL of tetrahydrofuran, 962 mg of 2,2-difluorobenzo[1,3]dioxol-5-carboxylic acid was suspended, 0.8 mL of triethylamine was added to the suspension, and after cooling with ice, thereto was added 0.75 mL of isobutyl chloroformate. The mixture was stirred for 1 hour, and then 662 mg of sodium borohydride was added thereto, and the reaction mixture was stirred at room temperature for 2 hours. The reaction mixture was acidified with 1 mol/L hydrochloric acid, the solvent was removed under reduced pressure, and ethyl acetate was added thereto. The organic layer was separated, washed with an aqueous saturated sodium chloride solution, and dried over anhydrous magnesium sulfate, and the solvent was removed under reduced pressure to obtain 942 mg of a colorless oily substance, (2,2-difluorobenzo[1,3]dioxol-5-yl)methanol.

1. temperatureafter cooling with ice
2. stirringthe reaction mixture was stirred at room temperature for 2 hours
3. customthe solvent was removed under reduced pressure, and ethyl acetate
4. additionwas added
5. customThe organic layer was separated
6. washwashed with an aqueous saturated sodium chloride solution
7. dry with materialdried over anhydrous magnesium sulfate
8. customthe solvent was removed under reduced pressure