Alkylation of cyclic amines with alcohols catalyzed by Ru(II) complexes bearing N -Heterocyclic carbenes
作者:Öznur Doğan Ulu、Nevin Gürbüz、İsmail Özdemir
DOI:10.1016/j.tet.2017.09.027
日期:2018.2
includes the synthesis of 2-(1,3-dioxane-2-yl)ethyl substituted benzimidazole substituted N-heterocyclic carbenes precursors and their ruthenium complexes. Synthesized compounds were characterized by elemental analysis and NMR spectroscopy. All complexes have been tested in the alkylation of pyrrolidine and morpholine with alcohols, showing an excellent activity in this reaction.
Transfer hydrogenation of ketones in the presence of half sandwich ruthenium (II) complexes bearing imidazoline and benzimidazole ligand
作者:Neslihan Şahin、Serpil Demir、İsmail Özdemir
DOI:10.3998/ark.5550190.p008.759
日期:——
using imidazoline and benzimidazole derivatives as interesting ligands due to the fact that they are structurally simple, readily available, inexpensive, and they allow easy introduction of various substituents into their structure. Therefore, Nsubstituted imidazoline and benzimidazoleligands and their new rutheniumcomplexes [RuCl2(η-p-cymene)(L)] (L = N-substituted imidazoline/benzimidazole) were
本文探讨了使用咪唑啉和苯并咪唑衍生物作为有趣的配体的可能性,因为它们结构简单、容易获得、价格低廉,并且可以轻松地将各种取代基引入其结构中。因此,合成并表征了 N 取代的咪唑啉和苯并咪唑配体及其新的钌配合物 [RuCl2(η-p-伞花烃)(L)](L = N-取代的咪唑啉/苯并咪唑)。研究了新配合物对酮类转移加氢反应的催化性能。此外,还以良好的收率获得了相应的仲醇。
Benzimidazolium sulfonate ligand precursors and application in ruthenium-catalyzed aromatic amine alkylation with alcohols
New benzimidazolium sulfonate salts have been prepared and fully characterized. They have been associated in situ with [RuCl2(p-cymene)]2 to generate efficient catalytic systems operating at 120 °C under neat conditions in the presence of potassium tert-butylate for selective N-alkylation of primary aromatic amines into secondary amines.
by homogeneous Pd-catalyzed directarylation is an important research topic in modern organic chemistry. In this study, PEPPSI-type, (PEPPSI = Pyridine Enhanced Precatalyst Preparation Stabilization and Initiation), new Pd-catalysts with N-heterocyclic carbene ligand were synthesized, and they were used as catalysts in the synthesis of bi(hetero)arenes by directarylation process. The structures of
摘要 由于双(杂)芳烃在工业上的重要性,通过均相 Pd 催化直接芳基化合成这些化合物是现代有机化学中的一个重要研究课题。本研究合成了具有 N-杂环卡宾配体的新型 Pd 催化剂,PEPPSI 型(PEPPSI = Pyridine Enhanced Precatalyst Prepared Stabilization and Initiation),并将它们用作直接合成双(杂)芳烃的催化剂。芳基化过程。Pd-卡宾配合物的结构通过不同的光谱和分析技术,如NMR、FT-IR和元素分析来阐明。通过单晶 X 射线衍射研究确定了其中一种配合物的更详细的结构特征。
Catechol‐bearing imidazolium and benzimidazolium chlorides as promising antimicrobial agents
作者:Mert O. Karataş、Selami Günal、Ahmet Mansur、Bülent Alıcı、İsmail Özdemir
DOI:10.1002/ardp.202000013
日期:2020.6
Catechol‐containing imidazolium (four) and benzimidazolium chlorides (eight) were synthesized to evaluate their antimicrobial properties. All the compounds were fully characterized using 1H and 13C nuclear magnetic resonance, liquid chromatography–mass spectrometry, infrared spectroscopic methods, and elemental analyses. Antimicrobial activities of the compounds were tested against the bacteria Escherichia