MECHANISM OF ISOMERISATION OF ortho OR para BROMO PHENOLS IN SUPERACIDS

Article abstract of DOI:10.1016/S0040-4039(00)87187-7

In superacids ortho or para bromo phenols are isomerised into the meta bromo isomers.In SbF5-HF, the process is intramolecular and proceeds by a 1,2-Br shift.In CF3SO3H, the mechanism involves loss of bromine, followed by meta bromination.