反应详情

To a solution of tert-butyl N-[(3S)-1-[3-cyano-6-[6-(6-methylpyrazin-2-yl)pyrazolo[4,3-c]pyridin-1-yl]-2-pyridyl]-3-piperidyl]carbamate (0.4859 mmol; 248.6 mg) in dichloromethane (8 mL) was added TFA (2 mL). The resulting mixture was stirred at room temperature for 4 hours. The mixture was concentrated and the residue was purified by reverse phase HPLC to afford 201 was obtained as an off-white solid (361.6 mg, 18%). 1H NMR (400 MHz, DMSO) δ 9.61-9.55 (s, 1H), 9.48-9.44 (s, 1H), 9.37-9.33 (s, 1H), 8.80-8.75 (s, 1H), 8.66-8.62 (s, 1H), 8.26-8.19 (m, 2H), 7.48-7.44 (d, J=8.4 Hz, 1H), 4.29-4.19 (dd, J=10.7, 6.9 Hz, 2H), 3.00-2.94 (m, 1H), 2.66-2.62 (s, 3H), 2.03-1.89 (dd, J=18.5, 10.2 Hz, 2H), 1.80-1.66 (m, 1H), 1.49-1.37 (m, 1H); MS (ESI) m/z: 412.2 [M+H]+

1. concentrationThe mixture was concentrated
2. customthe residue was purified by reverse phase HPLC