Dimethylformamide → N-(4-((2-amino-3-chloropyridin-4-yl)oxy)-2,5-difluorophenyl)-1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazole-4-carboxamide

Participants

Reaction Steps

To a solution of N-(2,5-difluoro-4-hydroxyphenyl)-1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazole-4-carboxamide (395 mg, 1.1 mmol) in DMF (5.0 mL) was added t-BuOK (202 mg, 1.8 mmol) and the mixture was stirred at rt for 30 minutes. Then 3,4-dichloropicolinamide (190 mg, 1.0 mmol) was added and the mixture was microwaved at 120° C. for 2 hours, then cooled to rt, quenched with water (30 mL) and extracted with EtOAc (50 mL×3). The combined organic phases were washed with brine (50 mL×3), dried over anhydrous Na2SO4, and concentrated in vacuo. The residue was purified by a silica gel column chromatography (MeOH/DCM (v/v)=1/30) to give the title compound as a pale yellow solid (310 mg, 60%).

Provenance & Evidence