反应详情

温度

90 °C

To a solution of 30% HBr in AcOH (10 mL, Spectrochem, India) was added (S)—N-((3-fluoro-4-(trifluoromethoxy)phenyl)(3-fluoropyridin-2-yl)methyl)-4-methoxy-5-nitropicolinamide (1 g, 0.002 mol), and the resulting reaction mixture was stirred for 12 h at 90° C. The reaction progress was monitored by TLC (50% EtOAc in petroleum ether). After completion of the reaction, the reaction mixture was concentrated and neutralized with sat'd NaHCO3 solution (pH˜7-7.5) and the aqueous solution was extracted with EtOAc (3×10 mL). The combined organic layers were dried over anhydrous sodium sulfate, and concentrated to afford the title compound as a pale yellow solid. 1H NMR (DMSO-d6) δ: 9.84 (d, J=7.5 Hz, 1H), 8.77 (s, 1H), 8.53 (d, J=4.5 Hz, 1H), 7.83-7.70 (m, 1H), 7.57-7.49 (m, 3H), 7.38-7.31 (m, 2H), 6.56 (d, J=7.5 Hz, 1H). MS (ESI, positive ion) m/z: 471.4 (M+H).

1. customthe resulting reaction mixture
2. customAfter completion of the reaction
3. concentrationthe reaction mixture was concentrated
4. extractionthe aqueous solution was extracted with EtOAc (3×10 mL)
5. dry with materialThe combined organic layers were dried over anhydrous sodium sulfate
6. concentrationconcentrated