Trifluoroacetic acid → (R)-N-(4-(3-aminopiperidin-1-yl)-5-chloro-1H-pyrrolo[2,3-b]pyridin-3-yl)isobutyramide hydrochloride

Participants

Reaction Steps

(R)-tert-Butyl 1-(5-chloro-3-isobutyramido-1H-pyrrolo[2,3-b]pyridin-4-yl)piperidin-3-ylcarbamate (0.100 g, 0.229 mmol) was placed in DCM (3 mL) at room temperature. TFA (1 mL) was then added, and the reaction was stirred at room temperature for 1 hour and concentrated to dryness. The resulting residue was then purified by reverse phase HPLC (0-50% ACN in water). The resulting product was next dissolved in minimal DCM (with MeOH to aid solubility) and added to a stirring solution of 1M HCl in ether. The resulting solid was filtered, washed with ether and dried to give (R)—N-(4-(3-aminopiperidin-1-yl)-5-chloro-1H-pyrrolo[2,3-b]pyridin-3-yl)isobutyramide hydrochloride (0.050 g, 53.3% yield). 1H NMR (400 MHz, D2O) δ 8.11 (s, 1H), 7.28 (s, 1H), 3.81-3.78 (m, 1H), 3.52-3.49 (m, 1H), 3.40-3.36 (m, 1H), 3.20-3.15 (m, 2H), 2.66-2.63 (m, 1H), 2.09-2.06 (m, 1H), 1.78-1.77 (m, 1H), 1.65-1.54 (m, 2H), 1.12-0.18 (m, 6H). LCMS (APCI+) m/z 336 (M+H)+.

Provenance & Evidence