Green alternative solvents for the copper-catalysed arylation of phenols and amides
作者:Carlo Sambiagio、Rachel H. Munday、A. John Blacker、Stephen P. Marsden、Patrick C. McGowan
DOI:10.1039/c6ra02265k
日期:——
for the Cu-catalysed arylation of phenols and amides is reported. Alkyl acetates proved to be efficient solvents in the catalytic processes, and therefore excellent alternatives to the typical non-green solvents used for Cu-catalysed arylationreactions. Solvents such as isosorbide dimethyl ether (DMI) and diethyl carbonate also appear to be viable possibilities for the arylation of phenols. Finally
Aryl bromides and phenols are coupled efficiently to the corresponding diaryl ethers in the presence of a practical Cu(I)/l-butylimidazole catalyst system. The convenient protocol is applied successfully to the synthesis of 16 different diaryl ethers in high yield and selectivity. (C) 2008 Elsevier Ltd. All rights reserved.