Trifluoroacetic acid → (3S)-1-[3-methoxy-6-[6-(6-methylpyrazin-2-yl)pyrazolo[4,3-c]pyridin-1-yl]pyrazin-2-yl]piperidin-3-amine

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Reaction Steps

A solution of tert-butyl N-[(3S)-1-[3-methoxy-6-[6-(6-methylpyrazin-2-yl)pyrazolo[4,3-c]pyridin-1-yl]pyrazin-2-yl]-3-piperidyl]carbamate (75 mg, 0.15 mmol) in dichloromethane 4.0 ml and trifluoroacetic acid (0.80 mL, 10 mmol) was stirred at RT 4 h. The reaction was concentrated and submitted for reverse phase HPLC to give 222 (25 mg) in 41% yield. MS (ESI) m/z: 418.2. 1H NMR (400 MHz, DMSO) δ 9.45 (s, 2H), 9.32 (s, 1H), 8.67 (s, 1H), 8.63 (s, 1H), 8.15 (s, 1H), 4.24 (d, J=10.2 Hz, 1H), 4.06 (d, J=13.3 Hz, 1H), 4.00 (s, 3H), 3.09 (dd, J=24.2, 12.0 Hz, 3H), 2.63 (s, 3H), 1.94 (d, J=15.0 Hz, 2H), 1.76 (d, J=10.0 Hz, 1H), 1.49 (d, J=10.0 Hz, 1H).

Provenance & Evidence