Kaloglu, MuratOzdemir, IsmailDorcet, VincentBruneau, ChristianDoucet, Henri2024-08-042024-08-0420171434-19481099-0682https://doi.org/10.1002/ejic.201601452https://hdl.handle.net/11616/97756Six benzimidazolium salts, having two nitrogen atoms substituted by various alkyl groups, have been synthesized in high yields. The benzimidazolium salts readily converted into the corresponding PEPPSI-type palladium-NHC complexes (PEPPSI = pyridine-enhanced precatalyst preparation, stabilization, and initiation). The structures of all compounds have been characterized by H-1 NMR, C-13 NMR, and IR spectroscopy, as well as elemental analysis techniques, which support the proposed structures. The molecular structure of one complex has been determined by single-crystal X-ray diffraction. The catalytic activity of the PEPPSI-type palladium-NHC complexes has been evaluated with respect to the direct C5-arylation of 2-substituted thiophene derivatives with various aryl halides. This arylation occurs efficiently and selectively at the C5-position of 2-substituted thiophene derivatives.eninfo:eu-repo/semantics/openAccessCarbenesBenzimidazolium saltsPalladiumHeterocyclesSubstituted thiophenesArticle101382139110.1002/ejic.2016014522-s2.0-85016145075Q2WOS:000397851900010Q2