Diisopropylethylamine → HCID 118522604, compound

Participants

Reaction Steps

To a solution of {3-(5-Chloro-2-difluoromethoxyphenyl)-4-[(pyrazolo[1,5-a]pyrimidine-3-carbonyl)amino]pyrazol-1-yl}acetic acid (100 mg) in DMF (5 mL) was added methyl 3-(piperazin-1-yl)propanoate hydrochloride (44 mg, 0.21 mmol), DIEA (90 mg, 0.70 mmol), HATU (79.2 mg, 0.21 mmol). The resulting solution was stirred at room temperature for 4 h and concentrated under vacuum. The crude product was purified by Prep-HPLC with the following conditions (Prep-HPLC-005): Column, XBridge Prep C18 OBD Column, 5 um, 19*150 mm; mobile phase, water with 0.05% FA and MeCN (40.0% up to 51.0% in 10 min, up to 95.0% in 1 min, hold 95.0% in 1 min, down to 40.0% in 2 min); Detector, UV 254/220 nm. This resulted in 56.1 mg (49%) of the formic acid salt of methyl 3-[4-(2-[3-[5-chloro-2-(difluoromethoxy)phenyl]-4-[pyrazolo[1,5-a]pyrimidine-3-amido]-1H-pyrazol-1-yl]acetyl)piperazin-1-yl]propanoate as a light yellow solid. LCMS (Method 25) [M+H]+=617.1, RT=1.51 min. 1H NMR (400 MHz, DMSO-d6) δ: (ppm) 9.76 (s, 1H), 9.34 (dd, 1H, J=1.6, 7.2 Hz), 8.68-8.67 (m, 2H), 8.31 (s, 1H), 7.62 (dd, 1H, J=2.8, 8.8 Hz), 7.55 (d, 1H, J=2.8 Hz), 7.45 (d, 1H, J=8.8 Hz), 7.28 (dd, 1H, J=4.4, 6.8 Hz), 7.08 (t, 1H, J=73.2 Hz), 5.23 (s, 2H), 3.60 (s, 3H), 3.49-3.41 (m, 4H), 2.59 (t, 2H, J=6.4 Hz), 2.51 (t, 2H, J=6.4 Hz), 2.39-2.33 (m, 4H).

Provenance & Evidence