反应详情

Pyridinium p-toluenesulfonate (PPTS) (0.24 g) was added to a mixed solution of 5-(1,3-dioxolan-2-yl)-8-methoxy-1-(6-thiophen-3-ylpyridin-3-ylmethyl)-3,4-dihydro-1H-quinolin-2-one (0.4 g) in acetone (8 ml) and water (4 ml), followed by heating under reflux 1.5 hours. The resulting mixture was concentrated under reduced pressure, subjected to extraction with dichloromethane, washed with water, washed with a saturated sodium chloride solution, dried over sodium sulfate, filtrated, and concentrated under reduced pressure to thereby obtain 0.4 g (yield: quantitative) of 8-methoxy-1-(6-thiophen-3-ylpyridin-3-ylmethyl)-2-oxo-1,2,3,4-tetrahydroquinoline-5-carboxaldehyde as a light brown amorphous solid.

1. temperatureby heating
2. temperatureunder reflux 1.5 hours
3. concentrationThe resulting mixture was concentrated under reduced pressure
4. extractionsubjected to extraction with dichloromethane
5. washwashed with water
6. washwashed with a saturated sodium chloride solution
7. dry with materialdried over sodium sulfate
8. filtrationfiltrated
9. concentrationconcentrated under reduced pressure