Trifluoroacetic acid → 2-((R)-1-(piperidin-4-yl)ethylamino)-4-(1-tosyl-5-(trifluoromethyl)-1H-pyrrolo[2,3-b]pyridin-3-yl)pyrimidine-5-carbonitrile 2,2,2-trifluoroacetate

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Trifluoroacetic acid (2 mL, 25.96 mmol) was added to a solution of tert-butyl 4-((1R)-1-(5-cyano-4-(1-tosyl-5-(trifluoromethyl)-1H-pyrrolo[2,3-b]pyridin-3-yl)pyrimidin-2-ylamino)ethyl)piperidine-1-carboxylate (1.2 g, 1.79 mmol) in dichloromethane (25 mL) and the reaction mixture was stirred at room temperature for 1 hour. The crude mixture was concentrated to dryness to give the title compound as a white solid (1.021 g, 98% yield).

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