title: Screening of ligands for the Ullmann synthesis of electron-rich diaryl ethers.
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.
authors.affiliation: Institute of Organic Chemistry, University of Mainz, Duesbergweg 10-14, 55128 Mainz, Germany.
authors.forename: Nicola
authors.initials: N
authors.lastname: Otto
authors.forename: Till
authors.initials: T
authors.lastname: Opatz