反应详情

温度

60 °C

In the ice bath, the starting material, about 10 mmol of 3-acetyl-4-nitro-aminobenzene was added into HBr/H2O (about 100 mL, 1/2, v/v), and sodium nitrite solution was gradually added. The solution was stirred at about 60° C. for about 2 hours. After the reaction was completed, the precipitate was filtered. The filtered solution was neutralized with about 1N NaOH, and extracted with EtOAc. Then the extracted material was dried with sodium sulfate anhydride. Next, the dried material was distilled under reduced pressure. Then, 3-acetyl-4-nitro-bromobenzene was obtained in a form of about 75% yellow oil using silica gel column chromatography (Hexane/EtOAc=2/1).

1. filtrationthe precipitate was filtered
2. extractionextracted with EtOAc
3. dry with materialThen the extracted material was dried with sodium sulfate anhydride
4. distillationNext, the dried material was distilled under reduced pressure