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。
Synthesis of Novel β-Lactams from Phenothiazin-10-ylacetic Acid
作者:Zahra Omidvari、Maaroof Zarei
DOI:10.1002/jhet.3138
日期:2018.5
The first synthesis of 3‐phenothiazine‐β‐lactams is herein reported. Thirteen new derivatives of β‐lactams were synthesized using various Schiff bases and (phenothiazin‐10‐yl)acetic acid, which in turn was prepared starting from phenothiazine. The sole product of the Staudinger ketene–imine [2 + 2] cycloaddition reaction is the trans‐β‐lactam. All the synthesized compounds were characterized by elemental
Half-sandwich ruthenium-carbene catalysts: Synthesis, characterization, and catalytic application in the N-alkylation of amines with alcohols
作者:Murat Kaloğlu
DOI:10.1016/j.ica.2019.119163
日期:2019.12
the synthesis and characterization of new half-sandwich ruthenium complexes containing oxygen functionalised N-aryl and N-alkyl benzimidazol-2-ylidene ligands have been reported. All ruthenium complexes were tested as catalysts for a wide range of substrates in the N-alkylation of secondary cyclic amines such as pyrrolidine and piperidine, and 4-methylaniline which was a primary aromaticamine with
Simple electrochemical reduction of nitrones to amines
作者:Eduardo Rodrigo、Siegfried R. Waldvogel
DOI:10.1039/c8sc04337j
日期:——
rings to the corresponding amines. The main advantage of this protocol relies on the fact that only electrons are needed, avoiding the use of different chemicals and harsh procedures, something that reinforces some green aspects. The conversion tolerates different moieties and a large variety of functional groups. In addition, this electrolysis can be performed on a simple undivided beaker-type cell