反应详情

温度

100 °C

After dissolving 4-amino-3-chlorophenol (3.17 g, 22.05 mmol) in dimethylsulfoxide (50 ml), sodium hydride (882 mg, 22.05 mmol) was gradually added at room temperature and the mixture was stirred for 30 minutes. The 4-chloro-7-methoxy-6-methoxycarbonylquinoline (3.70 g, 14.7 mmol) described in WO0050405 was added, and the mixture was heated at 100° C. for 3 hours. After standing to cool to room temperature, the reaction solution was distributed between ethyl acetate and water, and the organic layer was washed with water and saturated brine and dried over anhydrous sodium sulfate. The solvent was distilled off, silica gel column chromatography (eluent—ethyl acetate) was performed, the fraction containing the target substance was concentrated, suspended in ethyl acetate and diluted with hexane, and the crystals were filtered out and blow-dried to obtain the title compound (3.092 g, 8.62 mmol, 57.4%) as light brown crystals.

1. additionwas gradually added at room temperature
2. additionwas added
3. temperatureto cool to room temperature
4. washthe organic layer was washed with water and saturated brine
5. dry with materialdried over anhydrous sodium sulfate
6. distillationThe solvent was distilled off
7. additionthe fraction containing the target substance
8. concentrationwas concentrated
9. additiondiluted with hexane
10. filtrationthe crystals were filtered out and
11. customblow-dried