Beilstein journal of organic chemistry

Screening of ligands for the Ullmann synthesis of electron-rich diaryl ethers

N Otto, T Opatz

Index: Otto, Nicola; Opatz, Till Beilstein Journal of Organic Chemistry, 2012 , vol. 8, p. 1105 - 1111

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Citation Number: 12

Abstract

Abstract 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.