Majumder, Adhir; Naskar, Rajat; Phukan, Shankab J.; Maity, Ramananda published the artcile< Bimetallic PdII complexes with NHC/Py/PCy3 donor set ligands: applications in α-arylation, Suzuki-Miyaura and Sonogashira coupling reactions>, Quality Control of 576-83-0, the main research area is palladium binuclear imidazolylidene pyridine tricyclohexylphosphine complex preparation catalyst; Suzuki Sonogashira coupling catalyst palladium binuclear imidazolylidene tricyclohexylphosphine complex; alpha arylation oxindole catalyst palladium binuclear imidazolylidene tricyclohexylphosphine complex; crystal mol structure palladium binuclear imidazolylidene pyridine tricyclohexylphosphine complex.
Palladium binuclear NHC-pyridine and NHC-tricyclohexylphosphine complexes Me2C6H2-1,4-(MeImPdI2L)2 (2-5; MeIm = 3-methyl-1-imidazolyl-2-ylidene; L = 3-ClPy, 4-ClPy, 4-MeOPy, PCy3) were prepared and evaluated as catalysts for α-arylation of oxindole, Sonogashira coupling of PhCCH and Suzuki coupling of 3-bromo- and 4-bromobenzaldehyde with arylboronic acids. Bimetallic complexes bearing NHC donor ligands are gaining immense popularity as catalysts in organometallic chem. However, such complexes with a mixed NHC/PR3 donor set ligands are still rare. We present here a series of bimetallic PdII complexes featuring mixed NHC/Py/PCy3 donor set ligands applied in α-arylation of amide, Suzuki-Miyaura coupling and Sonogashira coupling reactions. All complexes have been characterized using standard characterization techniques and one of the complexes has been structurally characterized by X-ray crystallog. anal. Catalytic outcomes clearly indicate the superior activity of PdII complex bearing mixed NHC/PCy3 donor set ligands compared to the PEPPSI-type complexes in both α-arylation of amide and Sonogashira coupling reactions, though almost similar activities were observed for all the complexes in Suzuki-Miyaura coupling reactions. This observation might be due to the involvement of Pd-NPs as an active catalyst in Suzuki-Miyaura coupling reactions, whereas the Hg-poison test suggested the homogeneous nature of the other two types of reactions. Two pyridine rings in a mixed NHC/4-OMe(Py) donor complex are oriented almost in a parallel face-to-face fashion with a centroid to centroid separation of 3.758 Å, indicating π···π interactions between two methoxypyridine rings. This interaction leads to a very short Pd···Pd distance of 5.754 Å in the aforementioned complex.
New Journal of Chemistry published new progress about Alkynes, aryl Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Quality Control of 576-83-0.
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary