Abstract
A highly efficient, rapid and regioselective protocol was developed for the ring bromination
of aromatic compounds under mild conditions with ammonium bromide as a source of bromine
source and Oxone® (potassium peroxysulfate) as an oxidant. No metal catalyst or acidic additive is
required. A variety of aromatic compounds, including methoxy, hydroxy, amino, and
alkyl arenes, reacted smoothly to give the corresponding monobrominated products in
good to excellent yields in very short reaction times. Moreover, dibromination of
deactivated anilines to give the corresponding dibromides proceeded in high yields.
Interestingly, 1-(2-naphthyl)ethanone provided a ring-brominated product.
Key words
halogenation - bromination - arenes - regioselectivity - aryl halides