反应详情

温度

252.5 °C

Phenyl ether (1 L) was heated to 255° C. Butenoate 3 (334 g, 1.35 mol) was carefully added portionwise while maintaining temperature 245-260° C. After the addition was complete, the yellow-orange suspension was held at 255° C. for an additional 15 min. The mixture was slowly cooled to 40° C., the solids were collected by filtration and washed with EtOAc (3×500 mL) followed by MeOH (3×500 mL) to give hydroxy quinoline 4 as yellow-orange solid (256 g, 88% yield); 1H NMR (DMSO) δ 11.52 (br, s, 1H), 10.07 (s, 1H), 8.24 (s, 1H), 7.82 (d, 1H), 7.42 (d, 1H), 5.84 (s, 1H), 2.31 (s, 3H), 2.05 (s, 1H).

1. additionAfter the addition
2. temperatureThe mixture was slowly cooled to 40° C.
3. filtrationthe solids were collected by filtration
4. washwashed with EtOAc (3×500 mL)