Pyrene-Based Mono- and Di-N-Heterocyclic Carbene Ligand Complexes of Ruthenium for the Preparation of Mixed Arylated/Alkylated Arylpyridines
作者:Sergio Gonell、Eduardo Peris
DOI:10.1021/cs500735u
日期:2014.8.1
di-N-heterocyclic carbene ligands, two rutheniumcomplexes (one monometallic and the other dimetallic) have been obtained and fully characterized. The molecular structure of the dimetallic complex has been determined by means of X-ray diffraction studies. The electrochemical studies reveal that the metal–metal communication in the dimetallic complex is weak. The catalytic activity of both complexes has been
Solvent-free ruthenium-catalysed triflate coupling as a convenient method for selective azole-<i>o</i>-C–H monoarylation
作者:Oumaima Abidi、Taoufik Boubaker、Jean-Cyrille Hierso、Julien Roger
DOI:10.1039/c9ob00806c
日期:——
Metal-catalysed ortho-directed C-H functionalization usually faces selectivity issues in the competition between mono- and disubstitution processes. We report herein the ruthenium-catalysed N-directed C-H monoarylation of arylpyrazoles with a selectivity of up to 96% or that generally reaches values above 80%. This selectivity is an effect of solvent-free conditions associated with sulfonate reagents, in the absence
(η6-Arene)ruthenium(N-heterocyclic carbene) Complexes for the Chelation-Assisted Arylation and Deuteration of Arylpyridines: Catalytic Studies and Mechanistic Insights
作者:Amparo Prades、Macarena Poyatos、Eduardo Peris
DOI:10.1002/adsc.201000049
日期:——
A series of (η6‐arene)ruthenium complexes have been tested in the arylation of arylpyridines. One (η6‐p‐cymene)ruthenium(N‐heterocyclic carbene) complex (labelled as 1 in the text) was found to be the most effective, being capable of arylating a wide set of substantially different arylpyridines. Complex 1 is also able to promote the regioselective deuteration of a series of arylated N‐heterocycles
一系列的(η 6 -arene)钌配合物在芳基吡啶的芳基化了测试。酮(η 6 - p -cymene)钌(N-杂环卡宾)复合物(标记为1的文本)被发现是最有效的,能够芳基化的宽组基本上不同的芳基吡啶的的。复合物1还能够通过氮导向机制促进一系列芳基化N杂环的区域选择性氘化。氘代胺中的两种用于测量芳基化过程中的动力学同位素效应(KIE)。逆KIE的检测,与观察到的C一起H活化过程不需要添加碱,表明芳构化过程中的限速步骤可能与先前报道的研究不同。
Iron-Catalyzed Direct Arylation through Directed C−H Bond Activation
An iron-catalyzed C-C bond formation reaction of a nitrogen-containing aromatic compound with an arylzinc reagent takes place at 0 degrees C in a good to quantitative yield. The reaction involves a C-Hbondactivationdirected by a neighboring nitrogen atom. The important additives in this reaction are 1,10-phenanthroline, tetramethylethylenediamine, and 1,2-dichloro-2-methylpropane, in the absence
含氮芳族化合物与芳基锌试剂的铁催化 CC 键形成反应在 0 摄氏度下以良好的定量产率发生。该反应涉及由相邻氮原子引导的 CH 键活化。该反应中的重要添加剂是 1,10-菲咯啉、四甲基乙二胺和 1,2-二氯-2-甲基丙烷,在没有它们的情况下观察到非常低的产物收率。
RuCl<sub>3</sub>⋅<i>x</i> H<sub>2</sub>O-Catalyzed Direct Arylation of Arenes with Aryl Chlorides in the Presence of Triphenylphosphine
作者:Ning Luo、Zhengkun Yu
DOI:10.1002/chem.200902612
日期:2010.1.18
A simple, efficient, and economically attractive catalytic system has been developed for the directarylation of arenes with arylchlorides with the RuCl3⋅xH2O/PPh3/Na2CO3/N‐methyl‐2‐pyrrolidone system (see scheme). A remarkable effect of the nature of the base was observed, with Na2CO3 giving the best results.
一个简单的,高效和经济上有吸引力的催化体系已被开发用于芳烃的与和的RuCl芳基氯的直接芳基化3 ⋅ X ħ 2 O / PPH 3 /钠2 CO 3 / Ñ甲基-2-吡咯烷酮系统(参见方案)。观察到了碱性质的显着影响,其中Na 2 CO 3给出了最佳结果。