反应详情

1-(6-Chloropyridin-3-ylmethyl)-5-[1,3]dioxolan-2-yl-8-methoxy-3,4-dihydro-1H-quinolin-2-one (0.4 g), tris(dibenzylideneacetone)dipalladium (48.8 mg), 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (92.6 mg) and sodium tert-butoxide (0.15 g) were suspended in toluene (10.6 ml). N-methylaniline (0.17 g) was added, and the resulting mixture was heated under reflux in an argon atmosphere for 13 hours. After concentration under reduced pressure, the residue was purified by silica gel column chromatography (ethyl acetate:n-hexane=1:1→dichloromethane:methanol=20:1). The purified product was concentrated under reduced pressure to thereby obtain 0.45 g (yield: 95%) of 5-(1,3-dioxolan-2-yl)-8-methoxy-1-[6-(N-methyl-N-phenylamino)pyridin-3-ylmethyl]-3,4-dihydro-1H-quinolin-2-one as an amorphous solid.

1. temperaturethe resulting mixture was heated
2. temperatureunder reflux in an argon atmosphere for 13 hours
3. concentrationAfter concentration under reduced pressure
4. customthe residue was purified by silica gel column chromatography (ethyl acetate:n-hexane=1:1→dichloromethane:methanol=20:1)
5. concentrationThe purified product was concentrated under reduced pressure