Sodium Carbonate → Ethyl 1-[6-(2-methoxy-5-methylphenyl)pyridin-2-yl]-5-(trifluoromethyl)-1H-pyrazole-4-carboxylate

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a flask containing the title compound from Example 1 Step A (1.50 g, 4.69 mmol) were added 2-methoxy-5-methylphenyl boronic acid (0.779 g, 4.69 mmol) and trans-dichlorobis(triphenylphosphine) palladium (II) (329 mg, 0.469 mmol). Acetonitrile (12 mL) and sodium carbonate (11.7 mL, 1.0 M aqueous, 11.7 mmol) were added, and the resulting mixture was degassed via nitrogen sparge. The reaction mixture was stirred at 70° C. for 18 h, then was allowed to cool to room temperature and was poured into water. The mixture was extracted with EtOAc, and the organic phase was concentrated in vacuo. Purification by chromatography on silica gel (0 to 20% EtOAc in hexanes, then 20 to 100% EtOAc in hexanes) provided compound the title compound: LCMS m/z 406.4 [M+H]+; 1H NMR (500 MHz, CDCl3) δ 8.12 (s, 1H), 8.11 (d, J=8.0 Hz, 1H), 7.91 (t, J=8.0 Hz, 1H), 7.77 (d, J=2.0 Hz, 1H), 7.52 (d, J=8.0 Hz, 1H), 7.19 (dd, J=8.0, 2.0 Hz, 1H), 6.91 (d, J=8.0 Hz, 1H), 4.39 (q, J=7.0 Hz, 2H), 3.87 (s, 3H), 2.35 (s, 3H), 1.40 (t, J=7.0 Hz, 3H).

Herkunft & Nachweise