Copper-catalyzed Ullmann coupling under ligand- and additive- free conditions. Part 1: O-Arylation of phenols with aryl halides
摘要:
O-Arylation of a wide variety of substituted phenols and aliphatic alcohols with aryl halides catalyzed by copper iodide under mild ligand and additive free conditions ((BU4NBr)-B-n, DMF, K3PO4, reflux, 22 h) is accomplished in good to excellent product yields (up to 95%). (c) 2008 Elsevier Ltd. All rights reserved.