反应详情

To a mixture of 2-hydroxy-4-nitro-benzonitrile (2 g, 12.19 mmol) and K2CO3 (3.36 g, 24.39 mmol) in MeCN (20 mL) was added 1,2-dibromoethane (3.4 g, 18.29 mmol) at room temperature. The reaction mixture was stirred at room temperature for 18 h while monitoring by TLC. The solvent was removed under reduced pressure and the residue was taken up in ethyl acetate (100 mL) and washed with brine (2×25 mL). The organic layer was dried over anhydrous sodium sulphate and concentrated to give 2-(2-bromoethoxy)-4-nitrobenzonitrile (1.6 g, 49%) as a light red solid. 1H NMR (400 MHz, CDCl3) δ ppm 7.94-7.92 (1H, m), 7.82-7.78 (2H, m), 4.52 (2H, t, J=6.4 Hz), 3.73 (2H, t, J=6.4 Hz).

1. customThe solvent was removed under reduced pressure
2. washwashed with brine (2×25 mL)
3. dry with materialThe organic layer was dried over anhydrous sodium sulphate
4. concentrationconcentrated