Published January 1, 2015
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Palladium-catalysed Suzuki-Miyaura cross-coupling with imidazolylidene ligands substituted by crowded resorcinarenyl and calixarenyl units
- 1. Strasbourg Univ, UMR CNRS 7177, Lab Mol Inorgan Chem & Catalysis, Strasbourg, France
- 2. Cumhuriyet Univ, Fac Sci, Dept Chem, Sivas, Turkey
- 3. Univ Rennes 1, Inst Phys, UMR CNRS 6251, F-35014 Rennes, France
Description
Two N-heterocyclic carbene (NHC) palladium complexes of formula [PdBr2 (NHC)(pyridine)] in which the carbenic ring is flanked by sterically crowded cavitand substituents were prepared from appropriate imidazolium salts bearing either two resorcinarene or a combination of resorcinarene and calixarene fragments. Both complexes displayed high stability and good activities in the cross-coupling of aryl bromides with phenyl boronic acid. One of the imidazolium salts was characterised by an X-ray diffraction study.
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