Triaminophosphine ligands for carbon-nitrogen and carbon-carbon bond formation
申请人:Iowa State University Research Foundation, Inc.
公开号:US07385058B1
公开(公告)日:2008-06-10
Methods and compounds are provided for the formation of carbon-nitrogen or carbon-carbon bonds comprising reacting an amine or an aryl boronic acid with an aryl halide in the presence of a palladium catalyst, a base, and a compound of formula II:
Transition-Metal-Free Diarylation of Isocyanates with Arynes
作者:Woo Cheol Jang、Dong Wook Hwang、Jeong Hoon Seo、Haye Min Ko
DOI:10.1016/j.tetlet.2019.151018
日期:2019.9
A facile method for the transition-metal-free diarylation of isocyanates with arynes in the presence of cesium fluoride has been developed, which affords functionalized diaryl amines in moderate to excellent yields. This reaction has good functional group tolerance and provides excellent regioselectivity by utilizing a methoxy-substituted aryne precursor.
P(<i>i</i>-BuNCH<sub>2</sub>CH<sub>2</sub>)<sub>3</sub>N: An Effective Ligand in the Palladium-Catalyzed Amination of Aryl Bromides and Iodides
作者:Sameer Urgaonkar、M. Nagarajan、J. G. Verkade
DOI:10.1021/jo0205309
日期:2003.1.1
It is shown that the bicyclictriaminophosphine P(i-BuNCH2CH2)3N serves as an effective ligand for the palladium-catalyzed amination of a wide array of arylbromides and iodides. Other bicyclic or acyclic triaminophosphines, even those of similar basicity and/or bulk, were inferior.
Application of a New Bicyclic Triaminophosphine Ligand in Pd-Catalyzed Buchwald−Hartwig Amination Reactions of Aryl Chlorides, Bromides, and Iodides
作者:Sameer Urgaonkar、Ju-Hua Xu、John G. Verkade
DOI:10.1021/jo034994y
日期:2003.10.1
The new bicyclic triaminophosphine ligand P(i-BuNCH2)3CMe (3) has been synthesized in three steps from commercially available materials and its efficacy in palladium-catalyzed reactions of aryl halides with an array of amines has been demonstrated. Electron-poor, electron-neutral, and electron-rich aryl bromides, chlorides, and iodides participated in the process. The reactions encompassed aromatic
新的双环三氨基膦配体P(i-BuNCH2)3CMe(3)由市售材料分三步合成,并已证明其在钯催化的芳基卤化物与一系列胺反应中的功效。贫电子,中性电子和富电子芳基溴化物,氯化物和碘化物参与了该过程。反应包括芳族胺(伯或仲)和仲胺(环或无环)。还显示出弱碱Cs 2 CO 3可以与配体3一起使用,从而允许在我们的胺化方案中使用多种官能化的底物(例如,那些含有酯和硝基的底物)。该配体为芳基碘化物的胺化提供了一种非常普通,有效和温和的钯催化剂。尽管3对空气和湿气比较敏感,可以采用简单的程序来避免使用手套箱。比较3在这些反应中与前氮杂磷杂环戊烷P(i-BuNCH2CH2)3N的功效(2)显示,除了2中有转环的机会(但3中没有),这两者之间还存在其他明显的立体电子对比有助于解释Pd / 2和Pd / 3催化体系活性差异的配体。
(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