Expanding Pd-Catalyzed C−N Bond-Forming Processes: The First Amidation of Aryl Sulfonates, Aqueous Amination, and Complementarity with Cu-Catalyzed Reactions
作者:Xiaohua Huang、Kevin W. Anderson、Danilo Zim、Lei Jiang、Artis Klapars、Stephen L. Buchwald
DOI:10.1021/ja035483w
日期:2003.6.1
The first general method for the Pd-catalyzedamination of aryl tosylates and benzenesulfonates was developed utilizing ligand 1, which belongs to a new generation of biaryl monophosphine ligands. In addition, the new catalyst system for the first time enables amidation of aryl arenesulfonates and aqueousamination protocols that do not necessitate the use of cosolvents. The substrate scope has been
Pd催化芳基甲苯磺酸酯和苯磺酸酯胺化的第一种通用方法是利用配体1开发的,该配体属于新一代联芳基单膦配体。此外,新的催化剂系统首次实现了芳基芳烃磺酸盐的酰胺化和不需要使用助溶剂的水性胺化方案。底物范围已显着扩大到包括含有伯酰胺和游离羧酸基团的芳基卤化物。在多功能基板的情况下,Pd 催化的胺化可以提供与 Cu 催化的 CN 键形成过程互补的选择性。
(DiMeIHept<sup>Cl</sup>)Pd: A Low-Load Catalyst for Solvent-Free (Melt) Amination
作者:Volodymyr Semeniuchenko、Sepideh Sharif、Jonathan Day、Nalin Chandrasoma、William J. Pietro、Jeffrey Manthorpe、Wilfried M. Braje、Michael G. Organ
DOI:10.1021/acs.joc.1c01057
日期:2021.8.6
(DiMeIHeptCl)Pd, a hyper-branched N-aryl Pd NHC catalyst, has been shown to be efficient at performing amine arylation reactions in solvent-free (“melt”) conditions. The highly lipophilic environment of the alkyl chains flanking the Pd center serves as lubricant to allow the complex to navigate through the paste-like environment of these mixtures. The protocol can be used on a multi-gram scale to make
Electrochemical Reductive Arylation of Nitroarenes with Arylboronic Acids
作者:Dan Wang、Zhaohua Wan、Heng Zhang、Hesham Alhumade、Hong Yi、Aiwen Lei
DOI:10.1002/cssc.202101924
日期:2021.12.17
Reductive arylation: The synthesis of diarylamine is extremely important in organic chemistry. Herein, a novel electrochemical reductive arylation of arylboronicacids with nitroarenes is developed. A variety of diarylamines is synthesized without the need for transition-metal catalysts. The reaction can be scaled up efficiently in a flow cell and several derivatization reactions are carried out smoothly
Ir-Catalyzed C–H Amidation Using Carbamoyl Azides for the Syntheses of Unsymmetrical Ureas
作者:Kwangho Yoo、Jooyeon Lee、Myung Hwan Park、Youngjo Kim、Hyun Jin Kim、Min Kim
DOI:10.1021/acs.joc.0c00659
日期:2020.5.1
An iridium-catalyzed C-H amidation for the syntheses of unsymmetrical urea was developed using carbamoyl azides (R(R')N-C(O)-N3) as the nitrogen source. A combination of iridium and silver gave an active catalyst for C-N bond formation. A variety of urea derivatives were synthesized using carbamoyl azides with only dinitrogen byproducts. Finally, the use of the transientdirectinggroupstrategy with
Copper immobilized at a covalent organic framework: an efficient and recyclable heterogeneous catalyst for the Chan–Lam coupling reaction of aryl boronic acids and amines
作者:Yi Han、Mo Zhang、Ya-Qing Zhang、Zhan-Hui Zhang
DOI:10.1039/c8gc02611d
日期:——
inexpensive reagents and was employed as an effective support for heterogeneous copper. It was demonstrated that the obtained Cu@PI-COF is a highly active heterogeneous catalyst which can effectively promote the Chan–Lamcouplingreaction of aryl boronic acids and amines in an open flask without the aid of any base or additive. In addition, the catalyst could be readily recovered from the reaction mixture