反应详情

温度

80 °C

A suspension of 2-(dimethylamino)ethanol (128 mg, 1.435 mmol) in DMF (5 mL) was added to a solution of 1-fluoro-3-nitro-5-(trifluoromethyl)benzene (200 mg, 0.956 mmol) in DMF (5 mL). K2CO3 (264 mg, 1.913 mmol) was added and the mixture was stirred at 80° C. for 8 h. The mixture was cooled to rt. Then the solution was concentrated and distributed between ethyl acetate and saturated NaHCO3 solution. The combined organic extracts were washed with brine, dried over MgSO4, filtered and concentrated. The crude material was purified by preparative TLC (PE/EA=5:1, Rf=0.6) to yield a light yellow solid of N,N-dimethyl-2-(3-nitro-5-(trifluoromethyl)phenoxy)ethanamine (75 mg, 0.270 mmol, 28.2% yield): 1H NMR (400 MHz, CD3OD) δ 8.22-8.02 (m, 2H), 7.72 (s, 1H), 4.43 (t, J=5.1 Hz, 2H), 3.26 (t, J=4.9 Hz, 2H), 2.78-2.60 (m, 6H). ES-LCMS m/z 279 (M+H).

1. temperatureThe mixture was cooled to rt
2. concentrationThen the solution was concentrated
3. washThe combined organic extracts were washed with brine
4. dry with materialdried over MgSO4
5. filtrationfiltered
6. concentrationconcentrated
7. customThe crude material was purified by preparative TLC (PE/EA=5:1, Rf=0.6)