反应详情

Ethyl 6-chloro-4-(2-fluoro-4-iodoanilino)nicotinate (2.03 g, 4.83 mmol) was dissolved in acetic acid (75 mL), to which was added water (25 mL). This solution was heated at reflux for 14 h. The mixture was allowed to cool, then refrigerated, and a cream solid crystallised out. This material was isolated by filtration, washed well with water and hexanes, then dried to afford ethyl 4-(2-fluoro-4-iodoanilino)-6-oxo-1,6-dihydro-3-pyridinecarboxylate as a white solid (1.14 g, 59%), m.p. (acetone/MeOH) 262-264° C. 1H NMR [(CD3)2SO, 400 MHz] δ 11.59 (br s, 1H), 9.32 (s, 1H), 8.10 (s, 1H), 7.77 (dd, J=10.1, 1.9 Hz, 1H), 7.61 (ddd, J=8.4, 2.0, 0.8 Hz, 1H), 5.38 (d, J=1.3 Hz, 1H), 7.26-7.33 (m, 1H), 4.27 (q, J=7.1 Hz, 2H), 1.30 (t, J=7.1 Hz, 3H). Anal. Calcd for C14H12FIN2O3: C, 41.8; H, 3.0; N, 7.0. Found: C, 41.9; H, 2.8; N, 7.0.

1. temperatureThis solution was heated
2. temperatureat reflux for 14 h
3. temperatureto cool
4. customa cream solid crystallised out
5. customThis material was isolated by filtration
6. washwashed well with water and hexanes
7. customdried