反应详情

温度

0 °C

Methyl 2-(2-chloro-5-methoxy-4-nitrophenyl)acetate (10.2 g, 41.86 mmol) was dissolved in dry THF (200 mL) and cooled to 0° C. A 2M solution of LiBH4 in THF (41.86 mL, 83.73 mmol) was added at 0° C. over 20 minutes then the mixture was allowed to warm to room temperature and stirred for 5 hours. Saturated NH4Cl solution was added to the reaction cautiously and stirred further for 15 minutes then EtOAc (150 mL) and water (150 mL) were added. The separated aqueous phase was extracted with EtOAc (100 mL) then the combined organic extracts were dried (Na2SO4) and concentrated under reduced pressure. The residue was purified by column chromatography on neutral silica gel using 0-2% methanol in DCM to give the title compound (7.0 g, 72%) as a solid.

1. temperatureto warm to room temperature
2. stirringstirred further for 15 minutes
3. extractionThe separated aqueous phase was extracted with EtOAc (100 mL)
4. dry with materialthe combined organic extracts were dried (Na2SO4)
5. concentrationconcentrated under reduced pressure
6. customThe residue was purified by column chromatography on neutral silica gel using 0-2% methanol in DCM