反应详情

To a stirring mixture of (4-bromo-2-methoxyphenyl)acetonitrile (904 mg, 4.00 mmol), 1,3-dibromo-propane (880 mg, 4.40 mmol) in dimethylformamide (10 mL) was added sodium hydride (352 mg, 8.80 mmol) at 0° C. After addition, the mixture was stirred at room temperature for 3 hours. The reaction mixture was quenched with water and extracted with dichloromethane (50 mL×3). The organic phases were combined, dried over sodium sulfate and concentrated in vacuo to give a brown solid. The solid was purification by combiflash chromatography (Petroleum ether/EtOAc=20:1 to 5:1) to give the title compound (370 mg, 34.8%) as a white solid. 1H NMR (400 MHz, CDCl3) δ 7.10 (dd, 1H), 7.02 (d, 1H), 7.00 (d, 1H), 3.87 (s, 3H), 2.78 (m, 2H), 2.50 (m, 3H), 1.95 (m, 1H)

1. additionAfter addition
2. customThe reaction mixture was quenched with water
3. extractionextracted with dichloromethane (50 mL×3)
4. dry with materialdried over sodium sulfate
5. concentrationconcentrated in vacuo
6. customto give a brown solid
7. custompurification by combiflash chromatography (Petroleum ether/EtOAc=20:1 to 5:1)