反应详情

温度

90 °C

A mixture of 1-fluoro-3-nitro-5-(trifluoromethyl)benzene (800 mg, 3.83 mmol), 2-morpholinoethanol (552 mg, 4.21 mmol) and K2CO3 (1586 mg, 11.48 mmol) in DMF (20 mL) was stirred at 90° C. for 10 h. The mixture was concentrated. To the residue was added DCM (150 mL) and the mixture was stirred for 10 min and then filtered. The filtrate was concentrated. The residue was purified by silica column chromatography (PE/EA=10:1˜5:1). All fractions found to contain product by TLC (PE/EA=5:1, Rf=0.6) were combined and concentrated to yield a yellow solid of 4-(2-(3-nitro-5-(trifluoromethyl)phenoxy)ethyl)morpholine (600 mg, 1.780 mmol, 46.5% yield): 1H NMR (400 MHz, CDCl3): δ 8.02 (s, 1H), 7.87 (s, 1H), 7.43 (s, 1H), 4.16 (t, J=5.6 Hz, 2H), 3.72-3.63 (m, 4H), 2.79 (t, J=5.6 Hz, 2H), 2.58-2.47 (m, 4H). ES-LCMS m/z: 321 (M+H).

1. concentrationThe mixture was concentrated
2. additionTo the residue was added DCM (150 mL)
3. stirringthe mixture was stirred for 10 min
4. filtrationfiltered
5. concentrationThe filtrate was concentrated
6. customThe residue was purified by silica column chromatography (PE/EA=10:1˜5:1)
7. concentrationconcentrated