反应详情

A solution of 4-methyl-2-nitroanisole (25 mmol), N-bromosuccinimide (25 mmol) and benzoyl peroxide (2.5 mmol) in carbon tetrachloride (100 mL) was heated at reflux for 18 h. The reaction mixture was then poured into water and solid separated was filtered. The aqueous layer was extracted with carbon tetrachloride (3×50 mL) and organic phase was separated and evaporated to give a solid product. The solid products were combined and recrystallized from ethyl acetate-hexane to give a crystalline product of 3-nitro-4-methoxy benzyl bromide. m.p. 110-112° C., yield 70-75%.

1. temperatureat reflux for 18 h
2. customseparated
3. filtrationwas filtered
4. extractionThe aqueous layer was extracted with carbon tetrachloride (3×50 mL) and organic phase
5. customwas separated
6. customevaporated
7. customto give a solid product
8. customrecrystallized from ethyl acetate-hexane