Trifluoroacetic acid → HCID 89586276, compound

Participants

Reaction Steps

To a solution of tert-butyl (cyanomethyl)(1-phenyl-1H-pyrazol-5-yl)carbamate (4.38 g) in dichloromethane was added TFA (16.7 g) at room temperature, and the mixture was stirred for 5 hr. The reaction mixture was concentrated under reduced pressure, and adjusted to pH 9-10 with 1N aqueous sodium hydroxide solution. The reaction mixture was extracted with dichloromethane. The extract was washed with saturated brine, dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (dichloromethane/methanol) to give the title compound (1.90 g).

Provenance & Evidence