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

Participants

Reaction Steps

Trifluoroacetic acid (5 mL, 64.90 mmol) was added to tert-butyl 4-(1-(4-chlorophenyl)-2-(1-trityl-1H-imidazol-2-yl)ethylcarbamoyl)-1-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)piperidin-4-ylcarbamate (Intermediate 89) (310 mg, 0.38 mmol) at room temperature and the resulting solution stirred for 30 minutes. Water (5-6 drops) was then added and stirring continued for a further 30 minutes. The resulting solution was diluted with methanol and applied to a 10 g SCX column which was then eluted with MeOH followed by 2N NH3 (in MeOH). Product-containing fractions were combined and concentrated by evaporation then triturated with MeCN/DMF (1:1) to give a pale yellow ppt. The precipitate was collected by filtration, washed with MeCN and dried under vacuum to afford 4-amino-N-(1-(4-chlorophenyl)-2-(1H-imidazol-2-yl)ethyl)-1-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)piperidine-4-carboxamide (130 mg, 72.8%) as a cream solid.

Provenance & Evidence