反应详情

To a solution of 6-bromo-4-morpholin-4-ylquinoline (1.06 g, 3.62 mmol) in THF (22 mL) was added dropwise a 2.5M solution of n-butyllithium in hexanes (1.74 mL, 4.34 mmol, 1.2 equiv.) at −70° C. During the addition, the color of the solution was turned into red and this solution was stirred for 1 h at this temperature. Then, a solution of dimethylformamide (0.558 mL, 7.23 mmol) in THF (2 mL) was added dropwise. After addition, the mixture was allowed to warm to room temperature and stirred for 2 h. Then, the mixture was diluted with saturated ammonium chloride solution and the two layers were separated. The aqueous layer was extracted with ethyl acetate (3×50 mL). The combined organic extracts were washed with brine solution and dried over anhydrous magnesium sulfate. Filtration of the drying agent and removal of the solvent under the vacuum gave the crude residue which was purified by using a Biotage silica gel column chromatography to afford 0.390 g (44.5% yield) of 4-morpholin-4-yl-quinoline-6-carbaldehyde as a white solid: EI-LRMS m/e calcd for C14H14N2O2 (M+) 243.1, found 243.1.

1. additionDuring the addition
2. additionAfter addition
3. stirringstirred for 2 h
4. customthe two layers were separated
5. extractionThe aqueous layer was extracted with ethyl acetate (3×50 mL)
6. washThe combined organic extracts were washed with brine solution
7. dry with materialdried over anhydrous magnesium sulfate
8. filtrationFiltration of the drying agent and removal of the solvent under the vacuum
9. customgave the crude residue which
10. customwas purified