Journal
POLYHEDRON
Volume 208, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.poly.2021.115412
Keywords
Benzimidazolium Chlorides; Palladium-PEPPSI; Homogeneous catalyst; C-H bond activation; Direct arylation reaction
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Funding
- Technological and Scientific Research Council of Turkey (TuBITAK) [2216]
- Inodnu University Research Fund [Iu-BAP: FBG-2019-1594]
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The study successfully synthesized five new Pd PEPPSI-type complexes with NHC spectator ligands, which showed significant activity in direct arylation reactions. Structural details were further confirmed through single crystal X-ray diffraction study, showing good results with just 1 mol % catalyst loading in two hours.
The growing interest of industry in the field of bi(hetero)arenes compounds, motivated us to synthesize these compounds via homogeneous catalytic route by using Pd PEPPSI-type complexes through direct arylation. In this work, the five new Pd PEPPSI-type complexes bearing NHC spectator ligands were synthesized and characterized by a bunch of spectroscopic techniques. Further confirmations of structural details were provided by a single crystal X-ray diffraction study of one pro-ligand and one complex. All these newly synthesized Pd-carbene complexes were found significantly active as catalysts toward direct arylation of five members heterocyclic compounds such as n-propylthaizole, 2-acetylfurane and 2-acetylthiophene with aryl bromides derivatives. These catalysts give significantly good results within two hours with just 1 mol % catalyst loading.
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