A modified Cu(0)-Cu(I)-mediated C<inf>aryl</inf>-C<inf>aryl</inf>Ullmann coupling for the synthesis of biaryls

Abstract

© 2016 Elsevier Ltd A novel Cu(0)-Cu(I)-mediated Caryl-CarylUllmann coupling has been successfully developed. The use of Cu(I) salts allowed the reactions to proceed under relatively mild conditions (65 °C in DMSO for 15–72 h). The developed method was compatible with a relatively wide range of functional groups simultaneously present on the aromatic ring of different electronic nature. The aryl halides with an electron-withdrawing group ortho to the halide or an electron-donating group meta or para to the halide furnished the corresponding products in good to excellent yields (up to 98%).