反应详情

To a solution of 2-[4-(2-hydroxy-ethoxy)-3,5-dimethyl-phenyl]-5,7-dimethoxy-3H-quinazolin-4-one (0.50 g, 1.35 mmol) in anhydrous THF (20 mL) were added triphenyl phosphine (0.53 g, 2.02 mmol), pyrrolidine-2,5-dione (0.20 g, 2.02 mmol), and N,N-diisopropylethyl amine (0.44 g, 3.38 mmol). To this stirred solution was added diethylazodicarboxylate (0.35 g, 2.02 mmol). The reaction mixture was stirred at room temperature for 8 hours under nitrogen. Ethyl acetate (400 mL) was added. The organic phase was separated, washed with water (100 mL), then brine (100 mL), and dried over anhydrous Na2SO4. The solvent was removed under reduced pressure. The crude material was purified by the Simpliflash system (4:96 methanol:CH2Cl2 as eluent) to give the title compound as a white solid. Yield: 0.3 g. (49%). 1H NMR (400 MHz, CDCl3): δ 9.30 (br s, 1H), 7.66 (s, 2H), 6.82 (d, J=2.4 Hz, 1H), 6.46 (d, J=1.6 Hz, 1H), 3.99 (s, 3H), 3.97 (s, 3H), 3.92 (s, 4H), 2.78 (s, 4H), 2.31 (s, 6H). MS (ES) m/z: 452.51 (M+1) (100%).

1. customThe organic phase was separated
2. washwashed with water (100 mL)
3. dry with materialbrine (100 mL), and dried over anhydrous Na2SO4
4. customThe solvent was removed under reduced pressure
5. customThe crude material was purified by the Simpliflash system (4:96 methanol:CH2Cl2 as eluent)