%0 Journal Article
%T Screening of ligands for the Ullmann synthesis of electron-rich diaryl ethers
%A Nicola Otto
%A Till Opatz
%J Beilstein Journal of Organic Chemistry
%D 2012
%I 
%R 10.3762/bjoc.8.122
%X In the search for new ligands for the Ullmann diaryl ether synthesis, permitting the coupling of electron-rich aryl bromides at relatively low temperatures, 56 structurally diverse multidentate ligands were screened in a model system that uses copper iodide in acetonitrile with potassium phosphate as the base. The ligands differed largely in their performance, but no privileged structural class could be identified.
%K catalysis
%K C¨CO bond formation
%K diaryl ethers
%K nucleophilic aromatic substitution
%K Ullmann-type coupling
%U http://dx.doi.org/10.3762/bjoc.8.122