反应详情

A mixture of methyl 5-chloro-2-methyl-3-nitrobenzoate (6 g, 26.2 mmol), NBS (5.1 g, 28.8 mmol), and BPO (0.63 g, 2.6 mmol) in CCl4 (50 mL) was heated to reflux overnight. Water (200 mL) was added and CCl4 was removed under reduced pressure. The residue was extracted with DCM (200 mL×3). The combined organic layers were washed with brine, dried over Na2SO4, and concentrated to give crude title compound (7 g, yield 87%) as a brown oil which was used in the next step without purification.

1. temperaturewas heated
2. temperatureto reflux overnight
3. customCCl4 was removed under reduced pressure
4. extractionThe residue was extracted with DCM (200 mL×3)
5. washThe combined organic layers were washed with brine
6. dry with materialdried over Na2SO4
7. concentrationconcentrated