Bromination of alkylbenzenes in 1-butyl-3-methylimidazolium bromide and its dibromide complex

A thermo-regulated highly regioselective mono and dihalogenations of phenols and anilines in water employing new Lewis base adducts (LBAs) [DBUBr]+Br− and [DBUI]+I− as green reagents: a simple approach

“…[12][13][14] This led to the development of new bromination reagents to overcome the above-mentioned setbacks. N-Bromosuccinimide (NBS), [15][16][17] tribromoisocyanuric acid (TBCA), 18 or 1-butyl-3-methylimidazolium tribromide, 19,20 and a few other methods [20][21][22][23][24] have been developed, which addressed some of the earlier issues with bromine; however, the use of a co-reagent or a base is necessary and also halogenations could not be conducted in green solvents. Metalcatalysed brominations were also developed.…”