反应详情

6-Methoxy-7-methyl-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid (22 g) was suspended in diphenyl ether (200 ml), and the suspension was heated under reflux overnight. The reaction solution was cooled to room temperature, hexane was then added to the reaction solution, and the precipitated crystal was collected by filtration to give 6-methoxy-7-methyl-1H-quinolin-4-one (16.6 g, yield 93%).

1. temperaturethe suspension was heated
2. temperatureunder reflux overnight
3. filtrationthe precipitated crystal was collected by filtration