反应详情

A solution of benzo[h]quinoline (6 g, 33.5 mmol) and KOH (5.6 g, 100.5 mmol) in water (400 mL) was boiled. A hot solution of KMnO4 (14.8 g, 93.8 mmol) in water (240 mL) was added dropwise over 1 hour to the boiling solution. The mixture was refluxed for another 6 hours and filtered hot. The filtrate was allowed to cool to room temperature. The organic layer was extracted with chloroform and water, dried with anhydrous magnesium sulfate. After solvent removal, the residue was purified by column chromatography on silica (acetone-petroleum ether) to give product 2.5 g (42%) as a yellow solid.

1. temperatureThe mixture was refluxed for another 6 hours
2. filtrationfiltered hot
3. extractionThe organic layer was extracted with chloroform and water
4. dry with materialdried with anhydrous magnesium sulfate
5. customAfter solvent removal
6. customthe residue was purified by column chromatography on silica (acetone-petroleum ether)