Acetyl chloride → N-[3,5-Difluoro-4-(1H-pyrrolo[2,3-b]pyridin-4-yloxy)phenyl]acetamide

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Reaction Conditions

Reaction Steps

1.60 g (6.14 mmol) of 3,5-difluoro-4-(1H-pyrrolo[2,3-b]pyridin-4-yloxy)aniline are suspended in 45 ml of dichloromethane and cooled to 0° C. 2.57 ml (18.4 mmol) of triethylamine and 0.87 ml (12.3 mmol) of acetyl chloride are added dropwise, and stirring at 0° C. is continued for 2.5 hours. A further 0.86 ml (6.14 mmol) of triethylamine and 0.44 ml (6.14 mmol) of acetyl chloride are added, and the mixture is allowed to react for another hour. Saturated sodium bicarbonate solution is then added, and the mixture is stirred at RT for 10 min. The mixture is extracted twice with dichloromethane. The combined organic phases are dried over magnesium sulfate and the solvent is removed under reduced pressure. The crude product is taken up in 45 ml of ethanol. 1.14 ml (6.14 mmol) of 5.4M sodium methoxide solution are added, and the mixture is stirred at RT for 30 min. The mixture is concentrated and the product is purified by chromatography on silica gel (mobile phase: dichloromethane/methanol (7N ammonia) 100:1 to 100:5).

Provenance & Evidence