Facile p-toluenesulfonic acid-promoted para-selective monobromination and chlorination of phenol and analogues
摘要:
para-Regioselective bromination of phenol and analogues, promoted by p-toluenesulfonic acid, is achieved in high to excellent yields at room temperature with N-bromosuccinimide. Chlorination with N-chlorosuccinimide and catalysed by p-toluenesulfonic acid also gives para-chlorinated phenol analogues in good yields at room temperature. (C) 2010 Elsevier Ltd. All rights reserved.