介绍了一种通过逐步钌催化的 C-H 芳基化和钾介导的还原性环化脱氢从 2-苯基吡啶和芳基溴化物合成二苯并 [f, h] 喹啉及其衍生物的方法。一种二苯并[ f , h ] 喹啉衍生物被用作双齿配体来制备环金属化的钌络合物。通过单晶 X 射线结构分析表征了两种二苯并 [ f , h ] 喹啉化合物和钌络合物。
Directing Group‐Promoted Inert C−O Bond Activation Using Versatile Boronic Acid as a Coupling Agent
作者:Ram Ambre、Ting‐Hsuan Wang、Anmei Xian、Yu‐Shiuan Chen、Yu‐Fu Liang、Titel Jurca、Lili Zhao、Tiow‐Gan Ong
DOI:10.1002/chem.202004132
日期:2020.12.18
strategy facilitates the efficient catalytic cross‐coupling of methoxyarenes with a variety of organoboronreagents. Directing groups facilitate the activation of inert C−O bonds in under‐utilized aryl methyl ethers enabling their adaptation for C−C cross‐coupling reactions as less toxic surrogates to the ubiquitous haloarenes. The method reported enables C−C cross‐coupling with readily available and economical
Palladium-Catalyzed Direct <i>Ortho</i> C–H Arylation of 2-Arylpyridine Derivatives with Aryltrimethoxysilane
作者:Wu Li、Zhangwei Yin、Xiaoqing Jiang、Peipei Sun
DOI:10.1021/jo2016168
日期:2011.10.21
A Pd(OAc)2-catalyzed cross-coupling reaction between 2-arylpyridine and aryltrimethoxysilane in the presence of AgF and BQ in 1,4-dioxane was studied. After various reaction parameters (catalyst, oxidant, additive, solvent and reaction temperature) were examined, the optimal conditions for the reaction were identified. The synthesis is compatible to aryltrimethoxysilane with both electron-withdrawing
研究了在1,4-二恶烷中,在AgF和BQ存在下,Pd(OAc)2催化2-芳基吡啶与芳基三甲氧基硅烷之间的交叉偶联反应。在检查了各种反应参数(催化剂,氧化剂,添加剂,溶剂和反应温度)后,确定了反应的最佳条件。该合成与芳基三甲氧基硅烷在芳基部分上具有吸电子基团和给电子基团两者相容,且产率适中。提供了C–H键活化的动力学同位素效应(k H / k D)。
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。
Acetamide as Cocatalyst for the Nitrogen-Directed Coupling of Arenes with Aryl Chlorides through Ruthenium-Catalyzed C-H Activation
作者:Jie Zhang、Qin Yang、Zhu Zhu、Mao Lin Yuan、Hai Yan Fu、Xue Li Zheng、Hua Chen、Rui Xiang Li
DOI:10.1002/ejoc.201201127
日期:2012.12
by C–H activation is described. Acetamide was found to be an effective cocatalyst for this generally applicable ruthenium(II)-catalyzed direct arylation reaction. A wide range of deactivated aryl chlorides could be efficiently coupled under the mild temperature of 101 °C. The new process is highly atom-economical and sustainable.
描述了一种通过 C-H 活化交叉偶联芳烃的简单高效的方法。发现乙酰胺是这种普遍适用的钌 (II) 催化的直接芳基化反应的有效助催化剂。在 101 °C 的温和温度下,可以有效地偶联多种失活的芳基氯。新工艺具有高度的原子经济性和可持续性。
Combination of RuCl<sub>3</sub>·xH<sub>2</sub>O with PEG – a simple and recyclable catalytic system for direct arylation of heteroarenes via C–H bond activation
作者:Lei Jian、Hai-Yu He、Jin Huang、Qian-Hui Wu、Mao-Lin Yuan、Hai-Yan Fu、Xue-Li Zheng、Hua Chen、Rui-Xiang Li
DOI:10.1039/c7ra02638b
日期:——
A simple and recyclable catalytic system for directarylation of heteroarenes via C–H bond activation was developed with a relatively inexpensive RuCl3·xH2O as a catalyst and PEG-400 as a green medium without any additive or ligand. This system not only showed excellent functional group compatibility, but also the ratio of mono- to diarylated product was easily regulated by varying the reaction conditions
通过使用相对便宜的RuCl 3 · x H 2 O作为催化剂和PEG-400作为绿色介质,没有任何添加剂或配体,开发了一种简单且可回收的催化系统,用于通过C–H键活化杂芳烃直接芳基化。该体系不仅显示出优异的官能团相容性,而且通过改变反应条件也很容易调节单芳基化产物与二芳基化产物的比例。而且,该转化可以在空气中进行,并且在0.3mol%的低催化剂负载下可以容易地按比例放大至克级。特别地,在将该催化剂循环六次之后,获得了85%的良好产率。