Facile p-toluenesulfonic acid-promoted para-selective monobromination and chlorination of phenol and analogues
作者:Pakorn Bovonsombat、Rameez Ali、Chiraphorn Khan、Juthamard Leykajarakul、Kawin Pla-on、Suraj Aphimanchindakul、Natchapon Pungcharoenpong、Nisit Timsuea、Anchalee Arunrat、Napat Punpongjareorn
DOI:10.1016/j.tet.2010.06.041
日期:2010.8
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.