反应详情

温度

-70 °C

Trifluoromethanesulfonic anhydride (3.55 mL, 21.1 mmol) was added to a cooled (−75° C. ) solution of 2,6-dichloro-4-[[[[3-[[(1,1-dimethylethyl)dimethyl-silyl]oxy]phenyl]methyl]amino]carbonyl]phenol (7.50 g, 17.6 mmol) and triethylamine (9.8 mL, 70.4 mmol) in dry dichloromethane (70 mL). After stirring for 3 h at ˜−70° C., the reaction was quenched with solid ammonium chloride (6 g). The solvent was evaporated and ethyl acetate was added. The solution was washed with 1 N HCl, saturated aqueous sodium bicarbonate and brine. The organic layer was dried (MgSO4), filtered, evaporated and dried under high vacuum to give trifluoromethanesulfonic acid, 2,6-dichloro-4-[[[[3-[[(1,1-dimethylethyl)dimethyl-silyl]oxy]phenyl]methyl]amino]carbonyl]phenyl ester (9.46 g, 97%) as pale orange oil.

1. customthe reaction was quenched with solid ammonium chloride (6 g)
2. customThe solvent was evaporated
3. additionethyl acetate was added
4. washThe solution was washed with 1 N HCl, saturated aqueous sodium bicarbonate and brine
5. dry with materialThe organic layer was dried (MgSO4)
6. filtrationfiltered
7. customevaporated
8. customdried under high vacuum