反应详情

温度

110 °C

To a mixture of 1-fluoro-4-nitro-2-(trifluoromethyl)benzene (5 g, 23.91 mmol) in DMF (50 mL) was added K2CO3 (6.61 g, 47.8 mmol) and 2-(benzyloxy)ethanol (4.00 g, 26.3 mmol) at rt. The mixture was stirred at 110° C. for 12 h. LCMS and TLC (PE/EA=5:1, Rf=0.4) showed the reaction was finished. The mixture was filtrated, and the filtrate was concentrated to give crude product, which was purified by silica gel column to obtain 1-(2-(benzyloxy)ethoxy)-4-nitro-2-(trifluoromethyl)benzene (7.1 g, 18.18 mmol, 76.0% yield): 1H NMR (400 MHz, CDCl3) 8.49 (d, J=2.4 Hz, 1H), 8.38 (d, J=9.2 Hz, 1H), 7.54-7.28 (m, 5H), 7.13 (d, J=8.4 Hz, 1H), 4.56 (s, 2H), 4.36 (t, J=4.8 Hz, 2H), 3.89 (t, J=3.6 Hz, 2H); ES-LCMS m/z 342 (M+H).

1. filtrationThe mixture was filtrated
2. concentrationthe filtrate was concentrated
3. customto give crude product, which
4. customwas purified by silica gel column