Reaction of phenols with calculated amounts of benzyltrimethylammonium tribromide or tetrabutylammonium tribromide in dichloromethane–methanol for 0.5–1 h under mild conditions gave, selectively, the objective mono-, di-, or tribromophenols in good yields.
CITATION STYLE
Kajigaeshi, S., Kakinami, T., Okamoto, T., Nakamura, H., & Fujikawa, M. (1987). Halogenation Using Quaternary Ammonium Polyhalides. IV. Selective Bromination of Phenols by Use of Tetraalkylammonium Tribromides. Bulletin of the Chemical Society of Japan, 60(11), 4187–4189. https://doi.org/10.1246/bcsj.60.4187
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