反应详情

Butyryl chloride (350 mg, 3.28 mmol) in anhydrous dichloromethane (0.5 mL) was added dropwise to a solution of (R)-tert-butyl 1-(3-amino-5-chloro-1H-pyrrolo[2,3-b]pyridin-4-yl)piperidin-3-ylcarbamate (200 mg, 0.547 mmol; Example 91, Step A) and triethylamine (387 mg, 0.533 mL, 3.83 mmol) in NMP (1.0 mL) cooled on an ice-bath. The resulting mixture was stirred at ambient temperature for 1 hour. The mixture was diluted with THF (10 mL), treated with an aqueous 2N LiOH solution (3 mL) and stirred for 1 hour. The THF was evaporated, and the residue was stirred with water (20 mL) and extracted with EtOAc (3×20 mL). The combined organic extracts were dried over MgSO4, filtered and concentrated. The residue was purified by reverse phase chromatography (Biotage SP4, C-18 25M+, 15-80% CH3CN/water, 25 CV) to yield (R)-tert-butyl 1-(3-butyramido-5-chloro-1H-pyrrolo[2,3-b]pyridin-4-yl)piperidin-3-ylcarbamate (221 mg, 93% yield) as a solid. LCMS (APCI+) m/z 336.1, 436.1 (M+H)+, Retention time=3.75 minutes.

1. temperaturecooled on an ice-bath
2. stirringstirred for 1 hour
3. customThe THF was evaporated
4. stirringthe residue was stirred with water (20 mL)
5. extractionextracted with EtOAc (3×20 mL)
6. dry with materialThe combined organic extracts were dried over MgSO4
7. filtrationfiltered
8. concentrationconcentrated
9. customThe residue was purified by reverse phase chromatography (Biotage SP4