1404372-06-0Relevant articles and documents
The first use of [PdBr2(imidazolidin-2-ylidene)(pyridine)] catalysts in the direct C-H bond arylation of C2-substituted furan and thiophene
Kalo?lu, Murat,Kalo?lu, Nazan,?zdemir, Nam?k,?zdemir, ?smail
, p. 2821 - 2843 (2021)
Abstract: N-Heterocyclic carbene (NHC)-linked PEPPSI-type palladium complexes have recently been used in the direct C-H bond arylation of heteroarenes. However, in most of the published works, NHC ligands containing benzimidazole and imidazole ring have b
Synthesis, characterization and catalytic activity of PEPPSI-type palladium–NHC complexes
?zdemir, Ismail,Gürbüz, Nevin,Hamdi, Naceur,Mansour, Lamjed,Slimani, Ichraf
, (2020/10/12)
Eight benzimidazolium salts (2a–h) with two nitrogen atoms substituted by various alkyl groups have been synthesized in high yields. The benzimidazolium salts were readily converted into the corresponding PEPPSI-type palladium–NHC complexes (PEPPSI = pyridine-enhanced precatalyst preparation, stabilization, and initiation) (3a–h). The structures of all compounds were characterized by 1H NMR, 13C NMR, and IR spectroscopy as well as by elemental analysis techniques, which support the proposed structures. The catalytic activity of the PEPPSI-type palladium–NHC complexes was evaluated with respect to the direct C5-arylation of 2-substituted heteroaryl derivatives (thiophene, furan and thiazole) with various aryl bromides. This arylation occurs efficiently and selectively at the C5-position of the 2-substituted thiophene, furan and thiazole derivatives.
Synthesis, structures, DFT calculations, and catalytic application in the direct arylation of five-membered heteroarenes with aryl bromides of novel palladium-N-heterocyclic carbene PEPPSI-type complexes
?zdemir, ?smail,?zdemir, Nam?k,Benzerka, Saida,Boulebd, Houssem,Gürbüz, Nevin,Khiri-Meribout, Naima,el-Krim Sandeli, Abd
, p. 17878 - 17892 (2021/10/12)
A new series of Pd-catalysts based on an N-heterocyclic carbene PEPPSI-type ligand (PEPPSI = pyridine enhanced precatalyst preparation stabilization and initiation) with the general formula [Pd(ii)Br2(NHC)(pyridine)] was synthesized and fully characterize
