Trifluoroacetic acid → HCID 118522581, compound

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Reaction Steps

To a solution of [4-[(2-tert-butoxycarbonylamino-pyrazolo[1,5-a]pyrimidine-3-carbonyl)-amino]-3-(5-chloro-2-difluoromethoxy-phenyl)-pyrazol-1-yl]-acetic acid tert-butyl ester (0.91 g, 1.43 mmol) in dichloromethane (7 mL) was added TFA (15 mL) and the mixture left to stir at room temperature for 6 hours. The solvent was evaporated and the resultant residue azeotroped with dichlormethane/methanol to afford the title compound as a pale yellow solid (0.66 g, 97%). LCMS (Method 3) [M+H]+=477.8, RT=2.95 min. 1H NMR (400 MHz, DMSO-d6) δ: (ppm) 13.15 (br s, 1H), 9.56 (s, 1H), 8.93 (dd, 1H, J=1.5, 6.8 Hz), 8.37-8.34 (m, 1H), 8.35 (s, 1H), 7.63 (dd, 1H, J=2.8, 8.8 Hz), 7.56 (d, 1H, J=2.8 Hz), 7.46 (d, 1H, J=8.9 Hz), 7.26 (t, 1H, J=73.4 Hz), 7.00 (dd, 1H, J=4.5, 6.8 Hz), 6.58 (br s, 2H), 5.05 (s, 2H).

Provenance & Evidence