反应详情

3-Chloro-4-methylbenzonitrile (2.34 g, 15.4 mmol), NBS (3.0 g, 16.9 mmol) and benzoyl peroxide (0.37 g, 1.54 mmol) are taken up in carbon tetrachloride (50 mL, 0.3M) and refluxed until the reaction is judged complete by TLC. The mixture is then allowed to cool to room temperature and is filtered. The filtrate is concentrated and purified via flash column chromatography (0-5% EtOAc/hexanes) to give 4-bromomethyl-3-chlorobenzonitrile as a white solid. HRMS (ESI) m/z 229.9133 (229.9193 calcd for C8H6ClBrN, M+H).

1. temperaturerefluxed until the reaction
2. filtrationis filtered
3. concentrationThe filtrate is concentrated
4. custompurified via flash column chromatography (0-5% EtOAc/hexanes)