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

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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.

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Otto, N., & Opatz, T. (2012). Screening of ligands for the Ullmann synthesis of electron-rich diaryl ethers. Beilstein Journal of Organic Chemistry, 8, 1105–1111. https://doi.org/10.3762/bjoc.8.122

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