反应详情

A mixture of 6-chloropyridazin-3(2 H)-one (3000 mg, 22983 μmol), K2CO3 (5000 mg, 36178 μmol), and 4-(2-bromoethoxy)-7-methoxyquinoline (6110 mg, 21656 μmol) in DMF (25 mL) was stirred at room temperature for 1.5 h. H2O (50 mL) was added and the mixture was extracted with CH2Cl2 (3×50 mL). The organic layer was washed with H2O (50 mL), dried over Na2SO4, and concentrated to an orange oil. The oil was diluted with ether (40 mL) and the mixture was concentrated to slurry. Hexane (20 mL) was added and the mixture was agitated at 60° C. for 50 min and cooled to room temperature. The mixture was filtered, washed with ether to give a light tan solid (3.2 g). The filtrate was concentrated and partitioned between H2O (20 mL) and EtOAc (50 mL). The organic layer was washed with H2O and concentrated. The residue was triturated with acetone-hexane (1:2) to give a second crop of product (1.5 g). MS (ESI pos. ion) calc'd for C16H14ClN3O3: 331.1; found 332.1 (MH+). 1H NMR (400 MHz, Chloroform-d) δ ppm 3.93 (s, 3 H) 4.55 (t, J=5.28 Hz, 2 H) 4.67 (t, J=5.38 Hz, 2 H) 6.64 (s, 1 H) 6.94 (d, J=9.59 Hz, 1 H) 7.14 (dd, J=9.10, 2.45 Hz, 1 H) 7.18 (d, J=9.78 Hz, 1 H) 7.34 (d, J=2.54 Hz, 1 H) 8.05 (d, J=9.19 Hz, 1 H) 8.65 (d, J=5.28 Hz, 1 H).

1. extractionthe mixture was extracted with CH2Cl2 (3×50 mL)
2. washThe organic layer was washed with H2O (50 mL)
3. dry with materialdried over Na2SO4
4. concentrationconcentrated to an orange oil
5. additionThe oil was diluted with ether (40 mL)
6. concentrationthe mixture was concentrated
7. additionHexane (20 mL) was added
8. stirringthe mixture was agitated at 60° C. for 50 min
9. temperaturecooled to room temperature
10. filtrationThe mixture was filtered
11. washwashed with ether