反应详情

温度

-78 °C

1.37 g (3.58 mmol) of N-{4-[(3-bromo-1H-pyrrolo[2,3-b]pyridin-4-yl)oxy]-3,5-difluorophenyl}acetamide are dissolved in 200 ml of THF and cooled to −78° C. 1.6 ml (4.0 mmol) of a 2.5M n-butyllithium solution are added dropwise, and the mixture is stirred for 15 min. 752 mg (3.94 mmol) of p-toluenesulfonyl chloride as a solution in 7.5 ml of THF are then added dropwise. The reaction solution is allowed to warm to RT and stirred for one hour. The mixture is then partitioned between ethyl acetate and 0.1N aqueous sodium hydroxide solution. The aqueous phase is extracted twice with ethyl acetate. The combined organic phases are dried over magnesium sulfate and the solvent is removed under reduced pressure. The product is purified by column chromatography on silica gel (mobile phase: dichloromethane/acetone 20:1 to 10:1).

1. temperatureto warm to RT
2. stirringstirred for one hour
3. customThe mixture is then partitioned between ethyl acetate and 0.1N aqueous sodium hydroxide solution
4. extractionThe aqueous phase is extracted twice with ethyl acetate
5. dry with materialThe combined organic phases are dried over magnesium sulfate
6. customthe solvent is removed under reduced pressure
7. customThe product is purified by column chromatography on silica gel (mobile phase: dichloromethane/acetone 20:1 to 10:1)