Water → N-(4-((2-aminopyridin-4-yl)oxy)-3-fluorophenyl)-1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazole-4-c arboxamide

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A solution of 4-(4-(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazole-4-carboxamido)-2-fluorophenoxy)picolinamide (0.4 g, 0.86 mmol) and PhI(OAc)2 (419 mg, 1.5 mmol) in a mixture of EtOAc (8 mL), MeCN (8 mL) and H2O (4 mL) was cooled to 0° C. and stirred for 30 minutes. The reaction was then allowed to warm to rt, and stirred for another 8 h. The mixture was diluted with NaHCO3 (aq., 60 mL) and extracted with EtOAc (100 mL×3). The combined organic phases were washed with brine, dried over Na2SO4 and concentrated in vacuo. The residue was purified by a silica gel column chromatography (DCM/MeOH (v/v)=10/1) to give the title compound as a white solid (0.21 g, 56%).

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