反应详情

A mixture of 1B (5.0 g) and dimethylformamide (50 ml) is treated with sodium hydride (1.06 g). Benzylbromide (3.15 ml) was slowly added to the resulting reaction mixture and stirred at room temperature for 20 hours. The reaction mixture was poured into water. The mixture was extracted with diethyl ether twice. The combined organic phases were washed with water, dried and concentrated in vacuo. The crude product was chromatographed (hexane/dichloromethane, 1/1) to give the product as a white solid (4.5 g, 64%) with a melting point of 52°-53.5° C.

1. extractionThe mixture was extracted with diethyl ether twice
2. washThe combined organic phases were washed with water
3. customdried
4. concentrationconcentrated in vacuo
5. customThe crude product was chromatographed (hexane/dichloromethane, 1/1)