反应详情

Nitromesitylene (20.0 g) is added to a mixture of N-bromosuccinimide (11.7g, 2 equivalents) and azobisisobutyronitrile (10 mg) in carbon tetrachloride (1000 ml). The flask is illuminated with a bright incandescent bulb (controlled by a Variac) with stirring until reflux occurs; an additional heat source is required. After 4 hours the reaction mixture is cooled, evaporated to a residue and partitioned between water and dichloromethane. The organic phase is separated, dried, and evaporated to a residue which is purified by column chromatography on silica gel by gradient elution: benzene/hexane (1:9 to 4:1). The purified product, mostly 4-bromomethyl-2,6-dimethylnitrobenzene, is isolated as an orange oil, 36.8 g.

1. customThe flask is illuminated with a bright incandescent bulb (
2. temperatureuntil reflux
3. temperatureAfter 4 hours the reaction mixture is cooled
4. customevaporated to a residue
5. custompartitioned between water and dichloromethane
6. customThe organic phase is separated
7. customdried
8. customevaporated to a residue which
9. customis purified by column chromatography on silica gel by gradient elution