反应详情

A mixture of 4-fluoro-2-trifluoromethyl-aniline (5.0 g, 27.89 mmol) and 2-benzoyl-3-ethoxy-acrylic acid ethyl ester (6.9 g, 27.89 mmol) in toluene (125 mL) was heated at reflux. After 18 hr, the reaction was cooled, concentrated and purified by column chromatography (eluent 10% to 40% Et2O/hexanes) to give 2-benzoyl-3-(2-trifluoromethyl-4-fluoro-phenylamino)-acrylic acid ethyl ester (6.6 g, 62%); MS (ESI) m/z 382 (M+H)+; 1H NMR E:Z (mixture 1:1) (CDCl3): δ 0.88 (t, J=5.38 Hz, 3H), 0.95 (t, J=5.38 Hz, 3H), 4.02 (q, J=5.38 Hz, 2H), 4.07 (t, J=5.38 Hz, 2H), 7.29-7.51 (m, 10H), 7.53-7.56 (dt, J=9.67, 1.54 Hz, 2H), 7.66-7.68 (dt, J=8.33, 1.41 Hz, 2H), 8.10-8.13 (d, J=12.68 Hz, 2H), 8.36-8.39 (d, J=12.43 Hz, 2H), 11.17-11.20 (d, J=12.68 Hz, 1H), 12.39-12.42 (d, J=12.43 Hz, 1H).

1. temperaturewas heated
2. temperatureat reflux
3. temperaturethe reaction was cooled
4. concentrationconcentrated
5. custompurified by column chromatography (eluent 10% to 40% Et2O/hexanes)