4-Toluenesulfonyl chloride → N-[4-({3-bromo-1-[(4-methylphenyl)sulfonyl]-1H-pyrrolo[2,3-b]pyridin-4-yl}oxy)-3-fluorophenyl]acetamide

Participants

Reaction Conditions

Reaction Steps

3.23 g (8.87 mmol) of N-{4-[(3-bromo-1H-pyrrolo[2,3-b]pyridin-4-yl)oxy]-3-fluorophenyl}acetamide are dissolved in 500 ml of THF and cooled to −78° C. 3.90 ml (9.76 mmol) of a 2.5M n-butyllithium solution are added, and the mixture is stirred for 15 min. 1.86 g (9.76 mmol) of p-toluenesulfonyl chloride are then added dropwise as a solution in 20 ml of THF. The reaction solution is allowed to warm to RT and stirred for one hour. Sodium bicarbonate solution is then added, and the mixture is extracted three times with ethyl acetate. The combined organic phases are dried over magnesium sulfate and the solvent is removed under reduced pressure.

Provenance & Evidence