Resorcinarene-mono-benzimidazolium salts as NHC ligands for Suzuki--Miyaura cross-couplings catalysts

Authors : Ümit Işci, Muhittin Aygün, Resul Sevincek, Yunus Zorlu, Fabienne Dumoulin

Pages : 1300-1309

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Publication Date : 9999-12-31

Article Type : Makaleler

Abstract :Two mono-benzimidazolium salts of resorcinarene have been prepared and used as ligands in Suzuki--Miyaura cross-coupling reactions. They have been fully characterized by $^{1}$H and $^{13}$C NMR, MALDI, and FT-IR spectroscopic methods, and their structures were confirmed by X-ray diffraction analysis. These two new resorcinarene-based mono-benzimidazolium salts showed good catalytic activity for coupling reactions in DMF. The highest conversion was achieved for arylation of 4-bromotoluene using the resorcinarenyl mono-dimethylbenzimidazolium salt.
Keywords : Suzuki--Miyaura reaction, resorcinarene, cavitand, N-heterocyclic carbene, benzimidazolium salt, catalyst