反应详情

温度

155 °C

A solution of 4-chloro-6-hydroxy-7-methoxyquinoline (3.0 g, 14 mmol) and 4-chloro-2-fluoroaniline (3.5 g, 23 mmol) in cyclohexanol (100 ml) containing 1M ethereal hydrogen chloride (16 ml) was heated at 155° C. for 18 hours. After cooling the mixture was diluted with ether and isohexanes and the precipitate was collected by filtration. The crude product was dissolved in a mixture of methylene chloride/methanol/ammonia (100/10/1) and silica (10 g) was added. The solvent was removed by evaporation and the resulting powder was purified by flash chromatography eluting with methylene chloride/methanol/ammonia (95/5/1 increasing to 80/20/1) to give 4-(4-chloro-2-fluoroanilino)-6-hydroxy-7-methoxyquinoline (1.12 g, 25%).

1. temperatureAfter cooling the mixture
2. filtrationthe precipitate was collected by filtration
3. dissolutionThe crude product was dissolved in a mixture of methylene chloride/methanol/ammonia (100/10/1) and silica (10 g)
4. additionwas added
5. customThe solvent was removed by evaporation
6. customthe resulting powder was purified by flash chromatography
7. washeluting with methylene chloride/methanol/ammonia (95/5/1 increasing to 80/20/1)