反应详情

To a solution of 2-[4-(2-bromo-ethoxy)-3,5-dimethyl-phenyl]-5,7-dimethoxy-3H-quinazolin-4-one (0.17 g, 0.39 mmol) in N,N-dimethylformamide (0.5 mL) was added N-methylpiperazine (0.44 mL, 3.92 mmol) and the reaction mixture was stirred at room temperature for 15 hours. N,N-dimethylformamide was removed under reduced pressure. The residue was purified by column chromatography (silica gel 230-400 mesh; 5% methanol in dichloromethane as eluent) to give the title compound as a white solid. Yield: 60 mg (33.8%). MP 180-182° C. 1H NMR (400 MHz, DMSO-d6): δ 11.76 (s, 1H), 7.89 (s, 2H), 6.73 (d, J=2.4 Hz, 1H), 6.51 (d, J=2.4 Hz, 1H), 3.88 (m, 5H), 3.84 (s, 3H), 2.68 (t, J=5.6 Hz, 2H), 2.50 (br s, 4H), 2.32 (br s, 4H), 2.30 (s, 6H), 2.15 (s, 3H). MS (ES+) m/z: 453.21 (M+1).

1. customN,N-dimethylformamide was removed under reduced pressure
2. customThe residue was purified by column chromatography (silica gel 230-400 mesh; 5% methanol in dichloromethane as eluent)