4-Chloro-3-(trifluoromethyl)phenylacetic acid → 2-(4-chloro-3-(trifluoromethyl)phenyl)-1-(1-(4-fluorophenyl)-6,7-dihydro-1H-pyrazolo[4,3-b]pyridin-4(5H)-yl)ethanone

Beteiligte Stoffe

Reaktionsschritte

The compound was prepared from 4-chloro-3-trifluoromethylphenylacetic acid and 1-(4-fluorophenyl)-4,5,6,7-tetrahydro-1H-pyrazolo[4,3-b]pyridine using General Method B. The product mixture was washed with brine and 2×1 M NaHSO4. The reaction slurry was purified by flash chromatography (SiO2, 24 g column, eluting with 5-50% EtOAc in hexanes) to provide 54 mg (41%) of the title compound as a white solid. 1H NMR (400 MHz, CDCl3, mixture of rotamers) δ 8.44 (s, 0.8H), 7.59 (m, 1H), 7.57 (s, 0.2H), 7.41-7.51 (m, 4H), 7.17 (m, 2H), 4.03 (s, 0.3H), 3.95 (m, 0.3H), 3.91 (s, 1.7H), 3.78 (m, 1.7H), 2.82-2.85 (m, 2H), 2.05 (m, 2H); MS: (ES) m/z calculated for C21H17ClF4N3O [M+H]+ 438.1, found 438.1.

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