Trifluoroacetic acid → 4-amino-N-(1-(4-chlorophenyl)-3-(dimethylamino)-3-oxopropyl)-1-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)piperidine-4-carboxamide

Participants

Reaction Steps

TFA (1.0 mL) was added to a suspension of tert-butyl 4-(1-(4-chlorophenyl)-3-(dimethylamino)-3-oxopropylcarbamoyl)-1-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)piperidin-4-ylcarbamate (Intermediate 98) (770 mg, 0.24 mmol) in dichloromethane (10 mL) under argon. The resulting solution was stirred at room temperature for one night. The solvents were removed in vacuo and the reaction mixture was purified by preparative HPLC using a Waters X-Bridge reverse-phase column (C-18, 5 microns silica, 19 mm diameter, 100 mm length) and decreasingly polar mixtures of water (containing 0.2% ammonium carbonate) and acetonitrile as eluent. The fractions were evaporated to dryness to afford 4-amino-N-(1-(4-chlorophenyl)-3-(dimethylamino)-3-oxopropyl)-1-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)piperidine-4-carboxamide (74.0 mg, 64.8%) as a white powder.

Provenance & Evidence