Halogenation Using Quaternary Ammonium Polyhalides. IV. Selective Bromination of Phenols by Use of Tetraalkylammonium Tribromides

Abstract

Abstract 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.