反应详情

6,7-Dimethoxy-4-(2-methyl-quinolin-3-yloxy)-quinoline (compound 276) (108 mg) was dissolved in tetrahydrofuran (5 ml) to prepare a solution. A lithiumdiisopropylamide/1.8 M heptane-tetrahydrofuran-ethylbenzene solution (0.3 ml) was added to the solution at −78° C., and the mixture was stirred for 10 min. N-Bromosuccimide (180 mg) was added to the reaction solution, and the mixture was stirred at room temperature for 5 hr. Water was added to the reaction solution, and the mixture was extracted with ethyl acetate. The ethyl acetate layer was then washed with water and was dried over anhydrous sodium sulfate. The solvent was removed by distillation under the reduced pressure, and the residue was purified by thin layer chromatography using methanol-chloroform to give the title compound (23 mg, yield 16%).

1. customto prepare a solution
2. stirringthe mixture was stirred at room temperature for 5 hr
3. extractionthe mixture was extracted with ethyl acetate
4. washThe ethyl acetate layer was then washed with water
5. dry with materialwas dried over anhydrous sodium sulfate
6. customThe solvent was removed by distillation under the reduced pressure
7. customthe residue was purified by thin layer chromatography