Sodium Thiosulfate → 4-(7-bromo-1-cyclopentyl-4-methoxy-1H-pyrazolo[4,3-c]pyridin-3-yl)benzenesulfonamide

Participants

Reaction Steps

To a solution of 4-(1-cyclopentyl-4-methoxy-1H-pyrazolo[4,3-c]pyridin-3-yl)benzenesulfonamide (72.4 mg) obtained in Step A of Example 92 in DMF (5 mL) was added NBS (38.1 mg) at 0° C., and the mixture was stirred overnight at room temperature. To the reaction mixture was added saturated aqueous sodium thiosulfate solution, and the mixture was extracted with ethyl acetate. The organic layer was washed successively with water and saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate/hexane) to give the title compound (67.8 mg).

Provenance & Evidence