反应详情

To a mixture of 9a (0.6 g, 1.89 mmol) and diisopropylethylamine (0.4 mL, 2.08 mmol, 1.1 equiv) in 15 mL isopropanol was added 4-chloro-8-methoxyquinoline (17) (0.366 g, 1.89 mmol, 1 equiv). The mixture was refluxed with stirring for overnight. It was then evaporated and concentrate was dissolved in CH2Cl2 (50 mL) and the solution obtained was washed with 5% NaHCO3 (3×50 mL), brine (2×50 mL), and then dried over Na2SO4. The solution was filtered and evaporated to dryness. The residue was purified through column chromatography using 20% methanol in ethyl acetate to give 18a as white wax (0.66 g, 73% yield). 1H NMR (400 MHz, CDCl3) δ ppm 0.93-0.95 (t, 3H, 4 Hz), 1.75 (m, 3H), 2.11-2.21 (m, 2H), 2.69-3.07 (m, 13H), 3.23 (s, 4H), 3.47 (s, 1H), 4.02 (s, 3H), 6.60 (s, 1H), 6.66-6.68 (d, 1H, J=8 Hz), 6.82-6.84 (t, 2H, J=4 Hz), 6.98-7.00 (d, 1H, J=8 Hz), 7.36-7.42 (t, 1H, J=12 Hz), 7.50-7.52 (d, 1H, J=8 Hz), 8.67-8.68 (d, 1H, J=4 Hz).

1. temperatureThe mixture was refluxed
2. customIt was then evaporated
3. concentrationconcentrate
4. dissolutionwas dissolved in CH2Cl2 (50 mL)
5. customthe solution obtained
6. washwas washed with 5% NaHCO3 (3×50 mL), brine (2×50 mL)
7. dry with materialdried over Na2SO4
8. filtrationThe solution was filtered
9. customevaporated to dryness
10. customThe residue was purified through column chromatography