反应详情

温度

-40 °C

Diisopropylethylamine (2.2 mL, 12.92 mmol) and trifluoromethanesulfonic anhydride (1.3 mL, 7.75 mmol) were added to a solution of 4-{1-ethyl-1-[(E)-4-(3-ethyl-3-hydroxy-1-pentenyl)-3-methyl-phenyl]-propyl}-2,6-dimethyl-phenol (Example 38-(4); 2.55 g, 6.46 mmol) in dichloromethane (30 mL) at −40° C., and the mixture was stirred at −40° C. for 10 minutes. A saturated aqueous sodium bicarbonate solution was added to the reaction mixture, which was then heated to room temperature and extracted with dichloromethane. The organic layer was dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure. The resulting residue was purified by silica gel chromatography (hexane:ethyl acetate=100:0 to 50:50, 40 minutes) to give the target compound as a colorless oil (2.92 g, 86%).

1. temperaturewas then heated to room temperature
2. extractionextracted with dichloromethane
3. dry with materialThe organic layer was dried over anhydrous magnesium sulfate
4. filtrationfiltered
5. concentrationconcentrated under reduced pressure
6. customThe resulting residue was purified by silica gel chromatography (hexane:ethyl acetate=100:0 to 50:50, 40 minutes)