Journal
APPLIED ORGANOMETALLIC CHEMISTRY
Volume 34, Issue 2, Pages -Publisher
WILEY
DOI: 10.1002/aoc.5387
Keywords
direct arylation; heteroarene; N-heterocyclic carbene; palladium; PEPPSI
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Funding
- Technological and Scientific Research Council of Turkey TuBTAK [117R010]
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In this study, a series of benzimidazolium salts were synthesized as unsymmetrical N-heterocyclic carbene (NHC) precursors. Benzimidazolium salts were used for synthesis of the PEPPSI (pyridine enhanced precatalyst preparation stabilization and initiation)-themed, six new Pd-complexes with the general formula [PdX2(NHC)(pyridine)]. The structures of all compounds were characterized by various spectroscopic techniques such as H-1 NMR, C-13 NMR and FT-IR. The more detailed structural characterization of four of the complexes was determined by single-crystal X-ray diffraction study. The catalytic activities of all Pd-complexes were evaluated in the direct arylation of the 2-acetylfuran and 2-acetylthiophene with aryl bromides in the presence of 1 mol% catalyst loading.
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