Polymer-Supported Copper Complex for C−N and C−O Cross-Coupling Reactions with Aryl Boronic Acids
作者:Gary C. H. Chiang、Thomas Olsson
DOI:10.1021/ol048943e
日期:2004.9.1
[reaction: see text] Immobilization of copper onto modified Wang resin provided a polymer-supported copper catalyst, which is effective in cross-coupling reactions between N- or O-containing substrates and arylboronic acids. The copper catalyst is air stable and can be recycled with minimal loss of activity.
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。
Ligands for metals and improved metal-catalyzed processes based thereon
申请人:——
公开号:US20040171833A1
公开(公告)日:2004-09-02
One aspect of the present invention relates to ligands for transition metals. A second aspect of the present invention relates to the use of catalysts comprising these ligands in transition metal-catalyzed carbon-heteroatom and carbon-carbon bond-forming reactions. The subject methods provide improvements in many features of the transition metal-catalyzed reactions, including the range of suitable substrates, reaction conditions, and efficiency.
Palladium/Proazaphosphatrane-Catalyzed Amination of Aryl Halides Possessing a Phenol, Alcohol, Acetanilide, Amide or an Enolizable Ketone Functional Group: Efficacy of Lithium Bis(trimethylsilyl)amide as the Base
作者:Sameer Urgaonkar、John G. Verkade
DOI:10.1002/adsc.200404005
日期:2004.5
A commercially available catalyst system comprising Pd(OAc)2 or Pd2(dba)3 and the proazaphosphatrane ancillary ligand P(i-BuNCH2CH2)3N (1) for the amination of arylhalides substituted with a phenol, alcohol, acetanilide, amide or ketone group containing an enolizable hydrogen is described. The reaction is performed in the presence of LiN(SiMe3)2 as the base. Other bases tested were either less effective
Nickel/Photoredox Dual Catalytic Chan‐Lam Coupling of Aryl Azides and Arylboric Acids
作者:Xia Ge、Haojie Ji、Hongjian Lu
DOI:10.1002/cjoc.202400276
日期:2024.9.15
utilizes phenylboronic acids and arylazides as coupling agents in a redox-neutral environment, enabled by a synergistic nickel/photoredox catalytic system. This approach leverages a proton-coupled electron transfer mechanism to bypass the typical nitrene pathway associated with arylazides, which is prone to intramolecular rearrangement, C—H amination, and reductive hydrogenation. Notably, our method