Ruthenium(II)‐(Arene)‐N‐Heterocyclic Carbene Complexes: Efficient and Selective Catalysts for the
<i>N</i>
‐Alkylation of Aromatic Amines with Alcohols
characterized by 1 H NMR, 13 C NMR and FT-IR spectroscopy techniques. The catalytic activity of the ruthenium complexes has been evaluated with respect to the mono-N-alkylation reactions of aromatic amines with various alcohol derivatives under solvent-free conditions at 120 o C using the borrowing hydrogen strategy.
一系列不对称的 1,3-二取代苯并咪唑氯化物被合成为 N-杂环卡宾 (NHC) 前体。这些化合物用于合成 [RuCl2(芳烃)(NHC)] 类型的新型钌 (II) 配合物,(芳烃 = η 6-p-伞花烃)。所有化合物的结构均通过 1 H NMR、 13 C NMR 和 FT-IR 光谱技术表征。使用借氢策略,在无溶剂条件下,在 120 o C 下,对芳香胺与各种醇衍生物的单-N-烷基化反应评估了钌配合物的催化活性。
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.
Synthesis, crystal structure, DFT studies and catalytic activity of an N-(2,2-dimethyl-1,3-dioxolane-4yl-methyl)benzimidazole ruthenium(II) hydrate complex
作者:Namık Özdemir、Funda Doğan Karabekmez、Emine Özge Karaca、Nevin Gürbüz、İsmail Özdemir
DOI:10.1016/j.molstruc.2023.135159
日期:2023.6
In this study, the new N-coordinated benzimidazole ruthenium(II) complex was synthesized. The complex was fully characterized by FT-IR, 1H and 13C NMR spectroscopic methods. The molecular structure of the complex has been verified by X-ray crystallography. Besides, theoretical structure and spectroscopic data were obtained using density functional theory (DFT/HSEH1PBE) method with the cc-pVDZ basis
在这项研究中,合成了新的N配位苯并咪唑钌 (II) 络合物。该络合物通过 FT-IR、1 H 和13 C NMR 光谱方法进行了全面表征。该配合物的分子结构已通过X射线晶体学验证。此外,利用密度泛函理论(DFT/HSEH1PBE)方法获得了理论结构和光谱数据,其中 C、H、N、O 和 Cl 原子为 cc-pVDZ 基组,金属原子为 LANL2DZ 基组,并进行了比较与实验数据。还测试了该络合物在 KOBu t存在下在纯净条件下芳族胺与芳甲基醇的N-烷基化作用。
Co‐Catalyzed Metal‐Ligand Cooperative Approach for <i>N</i>‐alkylation of Amines and Synthesis of Quinolines via Dehydrogenative Alcohol Functionalization
作者:Sucheta Mondal、Subhasree Pal、Subhankar Khanra、Santana Chakraborty、Nanda D. Paul
DOI:10.1002/ejic.202300263
日期:2023.10.12
A well-defined Co-complex (1 a), bearing 2-(phenyldiazenyl)-1,10-phenanthroline ligand, catalyzed sustainable synthesis of various N-alkylated amines, indole, and substituted quinolines are reported using the readily available alcohols as the alkylating agents.