Acetic Anhydride → propane-1-sulfonic acid{3-[5-(1-acetyl-1H-indazol-5-yl)-1H-pyrrolo[2,3-b]pyridine-3-carbonyl]-2,4-difluoro-phenyl}-amide

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Reaction Steps

Into a round bottom flask, propane-1-sulfonic acid {2,4-difluoro-3-[5-(1H-indazol-5-yl)-1H-pyrrolo[2,3-b]pyridine-3-carbonyl]-phenyl}-amide (P-0001, 0.020 g, 0.040 mmol) is combined with acetic anhydride (0.023 mL, 0.24 mmol) and 4 mL of acetonitrile. The reaction is stirred at room temperature for 3 hours, then concentrated under vacuum, combined with water and extracted with ethyl acetate. The organic layer is dried over sodium sulfate, filtered and the filtrate concentrated under vacuum. The resulting material is purified by silica gel column chromatography, eluting with a gradient of 20-100% ethyl acetate (with 2% acetic acid) in hexanes. Appropriate fractions are combined and concentrated under vacuum, and the resulting solid is further washed with a mixture of ethyl acetate:hexanes to provide the desired compound. MS (ESI) [M+H+]+=538.0.

Provenance & Evidence