Acetic Acid → (R)-4-(1-amino-3-cyclopropyl-1-oxopropan-2-ylamino)-5-fluoro-2-(3-phenylisoxazol-5-ylamino)benzamide

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To a solution of (R)-2-(4-cyano-2-fluoro-5-(3-phenylisoxazol-5-ylamino)phenylamino)-3-cyclopropylpropanamide (75 mg) in EtOH (1 mL) and DMSO (0.5 mL) at room temperature, aq. 1N NaOH (0.5 mL) and aq. H2O2 (50%, 0.5 mL) were added. The mixture was stirred at room temperature for 15 min. HOAc (0.5 mL) was added. After being concentrated in vacuo, the residue was purified by HPLC to give the titled compound (13 mg). MS 424.4 (M+H); UV 201.0, 244.9, 289.1 nm; t 0.668 min.

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