反应详情

7.16 g (21.59 mmol) of tetrabromomethane and 5.66 g (21.59 mmol) of triphenylphosphine are dissolved in 70 ml of THF with exclusion of oxygen and stirred at room temperature for 30 minutes. Then 3.2 g (14.4 mmol) of tert-butyl 4-(2-hydroxyethyl)benzoate, dissolved in 30 ml of THF, are added dropwise, and the reaction mixture is stirred at room temperature for 12 hours. After conversion is complete, the mixture is evaporated to dryness and the resulting residue is purified by flash chromatography on silica gel (mobile phase: cyclohexane/ethyl acetate 10:1). 3.9 g (13.7 mmol, 87% yield) of the title compound are obtained as a colourless oil.

1. additionare added dropwise
2. stirringthe reaction mixture is stirred at room temperature for 12 hours
3. customthe mixture is evaporated to dryness
4. customthe resulting residue is purified by flash chromatography on silica gel (mobile phase: cyclohexane/ethyl acetate 10:1)