Synthesis, structures and catalytic activity of Pd(II) saccharinate complexes with monophosphines in direct arylation of five-membered heteroarenes with aryl bromides
作者:Veysel T. Yilmaz、Ceyda Icsel、Omer R. Turgut、Muhittin Aygun、Enes Evren、Ismail Ozdemir
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 1H NMR, 13C NMR and FT‐IR. The more detailed structural characterization of four of the complexes was determined by single‐crystal X‐ray
在这项研究中,合成了一系列苯并咪唑鎓盐作为不对称的N杂环卡宾(NHC)前体。苯并咪唑盐用于合成以PEPPSI(吡啶增强的前催化剂制剂的稳定和引发作用)为主题的六种新型Pd配合物,其通式为[PdX 2(NHC)(吡啶)]。所有化合物的结构均通过各种光谱技术进行了表征,例如1 H NMR,13C NMR和FT‐IR 通过单晶X射线衍射研究确定了四种配合物的更详细的结构表征。在负载量为1 mol%的情况下,在2-乙酰基呋喃和2-乙酰基噻吩与芳基溴的直接芳基化反应中,评估了所有Pd络合物的催化活性。
The first used butylene linked bis(N-heterocyclic carbene)-palladium-PEPPSI complexes in the direct arylation of furan and pyrrole
作者:Murat Kaloğlu、Serpil Demir Düşünceli、İsmail Özdemir
DOI:10.1016/j.jorganchem.2020.121236
日期:2020.6
bis-benzimidazole based N-heterocyclic carbene (NHC) precursors and their PEPPSI-type bimetallic Pd-complexes, and we implemented its activities in the direct C5-arylation of 2-acetylfuran and 1-methylpyrrole-2-carboxaldehyde with various aryl bromides. The catalyticactivities of the synthesized palladium-complexes were found to be very high. These complexes were fully characterized by different techniques
我们报道了丁烯键联的双苯并咪唑基N杂环卡宾(NHC)前体及其PEPPSI型双金属Pd配合物的合成和表征,我们在2-乙酰基呋喃和1-甲基吡咯的直接C5-芳基化中实现了其活性。 -2-甲醛与各种芳基溴化物。发现合成的钯配合物的催化活性非常高。这些配合物通过不同的技术进行了充分表征,例如1 H NMR,13 C NMR,FT-IR光谱和元素分析。
N-Heterocyclic carbene-palladium-PEPPSI complexes and their catalytic activity in the direct C–H bond activation of heteroarene derivatives with aryl bromides: synthesis, and antimicrobial and antioxidant activities
the 3c complex was determined by X-ray crystallography. More detailed structural characterization of the 3c complex was performed through single-crystal X-ray diffraction, which supports the proposed structures. The Pd–NHC–PEPPSI complexes were used as catalysts in the direct C5-arylation of 2-acetyl furan, 2-acetylthiophene, and 2n-propylthiazole with different aryl bromides. These complexes exhibited
在这项研究中,以高产率合成了一系列不对称的 1,3-二取代苯并咪唑氯化物2a-g,其中两个氮原子被不同的烷基取代,作为 N-杂环卡宾 (NHC) 前体。然后将这些苯并咪唑盐转化为 PEPPSI 家族的相应 Pd-NHC 配合物(PEPPSI = 吡啶增强的预催化剂制备、稳定和引发)3a-g。所有化合物的结构均通过1 H 核磁共振 (NMR) 光谱、13 C NMR 光谱、红外光谱和元素分析进行表征,这些都支持所提出的结构。3c的结构络合物通过 X 射线晶体学测定。通过单晶 X 射线衍射对3c复合物进行了更详细的结构表征,这支持了所提出的结构。Pd-NHC-PEPPSI 配合物用作2-乙酰基呋喃、2-乙酰噻吩和 2-正丙基噻唑与不同芳基溴化物直接 C 5芳基化反应的催化剂。这些配合物表现出中到高的催化活性,并且选择性地位于 C 5位置。此外,还评估了 Pd-NHC-PEPPSI 复合物对一系
New benzimidazolium N-heterocyclic carbene precursors and their related Pd-NHC complex PEPPSI-type: Synthesis, structures, DFT calculations, biological activity, docking study, and catalytic application in the direct arylation
New benzhydryl-5,6-dimethyl-(3-methylbenzyl)benzimidazolium salt as N-heterocyclic carbene precursors and their relatednew Pd-NHC complex PEPPSI-type with the general formula [PdBr2(NHC)(pyridine)] were prepared and theoretically studied. Quantum chemistry computations at the B3LYP/6-311G(d,p)/LANL2DZ level were used to examine the molecular structure, electronic characteristics, and chemical reactivity