反应详情

A solution of 2-(2-chloro-5-methoxy-4-nitrophenyl)ethanol (7.0 g, 30.22 mmol), triphenylphosphine (12.68 g, 48.3 mmol) and carbon tetrabromide (14.03 g, 42.3 mmol) in DCM (150 mL) was stirred at room temperature for 2 hours. The mixture was partitioned between water (150 mL) and EtOAc (100 mL), and then the separated aqueous phase was extracted with EtOAc (100 mL). The combined organic extracts were washed with water (80 mL), brine (80 mL), dried (Na2SO4) and concentrated under reduced pressure. The crude product was purified by column chromatography on neutral silica gel using 0-1% methanol in DCM to give the title compound (8.0 g, 90%) as a solid.

1. customThe mixture was partitioned between water (150 mL) and EtOAc (100 mL)
2. extractionthe separated aqueous phase was extracted with EtOAc (100 mL)
3. washThe combined organic extracts were washed with water (80 mL), brine (80 mL)
4. dry with materialdried (Na2SO4)
5. concentrationconcentrated under reduced pressure
6. customThe crude product was purified by column chromatography on neutral silica gel using 0-1% methanol in DCM