Water → (4-(7-chloro-1-(2,6-difluorophenyl)-4-oxo-4,5-dihydro-1H-pyrazolo[4,3-c]pyridin-3-yl)phenyl)acetonitrile

Participants

Reaction Steps

To a solution of (4-(1-(2,6-difluorophenyl)-4-methoxy-1H-pyrazolo[4,3-c]pyridin-3-yl)phenyl)acetonitrile (322.3 mg) obtained in Step A of Example 39 in DMF (10 mL) was added N-chlorosuccinimide (252 mg) at 0° C., and the mixture was allowed to be warmed to room temperature, and stirred for 1 day, and then at 100° C. for 1 day, and cooled to room temperature. The reaction mixture was added to water, and the mixture was extracted twice with ethyl acetate. The organic layers were combined, washed with saturated brine, and dried over sodium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (basic silica gel, ethyl acetate/hexane/methanol) to give the title compound (156 mg).

Provenance & Evidence