反应详情

A solution of 3-((3-fluoro-4-nitrophenoxy)methyl)-1-methyl-1H-pyrazole (70.0 g, 0.28 mol), (2-fluoro-4-(trifluoromethoxy)phenyl)methanamine (58.3 g, 0.28 mol), DIPEA (63.1 mL, 0.36 mol) and acetonitrile (350 mL) was stirred at 80° Celsius for 16 h. The reaction was cooled to RT, concentrated to dryness, and the resulting residue was recrystallized from ethanol (350 mL) and H2O (350 mL). The solid was collected by filtration and rinsed with a mixture of H2O/ethanol (3:1, 200 mL) followed by hexanes (2×300 mL) yielding the title compound as a yellow solid (116.3 g, 94.7%). MS (ESI): mass calcd. for C19H16F4N4O4, 440.1; m/z found, 441.0 [M+H]+. 1H NMR (600 MHz, CDCl3) δ 8.68-8.52 (m, 1H), 8.20-8.14 (d, J=9.5, 1H), 7.39-7.34 (m, 1H), 7.34-7.31 (d, J=2.2, 1H), 7.06-6.97 (d, J=9.8, 2H), 6.42-6.33 (dd, J=9.5, 2.5, 1H), 6.33-6.24 (m, 2H), 5.09-5.01 (s, 2H), 4.60-4.52 (d, J=5.9, 2H), 3.93-3.85 (s, 3H).

1. concentrationconcentrated to dryness
2. customthe resulting residue was recrystallized from ethanol (350 mL) and H2O (350 mL)
3. filtrationThe solid was collected by filtration
4. washrinsed with a mixture of H2O/ethanol (3:1, 200 mL)