Bromination [Synthetic Reagents]

　Dibromoisocyanuric acid (DBI) [D3753], which was first reported by Gottardi, is a mild and highly effective brominating reagent,^1,2) and has superior brominating ability when compared with N-bromosuccinimide (NBS), which is frequently used in organic synthesis. For instance, nitrobenzene was converted to the 3-bromonitrobenzene in 88% yield with DBI in conc. sulfuric acid in 5 min at 20ºC,^1a) but in only 70% yield with NBS in 50% sulfuric acid in 3 h at 85ºC. Thus DBI has been widely used as an effective brominating reagent.³⁾