反应详情

温度

110 °C

6.3 g (150 mmol) of lithium chloride, 16.8 ml (57 mmol) of tributylvinyltin and 1.6 g (1.5 mmol) of Pd(PPh3)4 are added sequentially at ambient temperature to a solution of 17.7 g (48 mmol) of 2-phenyl-3-methyl-8-trifluoromethanesulfonyloxyquinoline in 250 ml of dioxane, degassed beforehand using a stream of nitrogen. The reaction medium is then heated at 110° C. for 16 hours. After evaporating the dioxane, the residue is taken up in 200 ml of water and 200 ml of ethyl acetate. The aqueous phase is extracted with ethyl acetate. The organic phases are combined, dried over magnesium sulfate, filtered and concentrated under vacuum. The residue is purified by silica gel chromatography (eluent: ethyl acetate/cyclohexane 3/7) to provide 11.3 g of 2-phenyl-3-methyl-8-vinylquinoline in the form of a colorless oil. (Yield: 96%)

1. customdegassed
2. customAfter evaporating the dioxane
3. extractionThe aqueous phase is extracted with ethyl acetate
4. dry with materialdried over magnesium sulfate
5. filtrationfiltered
6. concentrationconcentrated under vacuum
7. customThe residue is purified by silica gel chromatography (eluent: ethyl acetate/cyclohexane 3/7)