New Stable Cu(I) Catalyst Supported on Weakly Acidic Polyacrylate Resin for Green C-N Coupling: Synthesis of N-(Pyridin-4-yl)benzene Amines and N,N-Bis(pyridine-4-yl)benzene Amines
作者:Nitin Kore、Pavel Pazdera
DOI:10.3390/molecules22010002
日期:——
A method for preparation of a new stable Cu(I) catalyst supported on weakly acidic polyacrylate resin without additional stabilizing ligands is described. A simple and efficient methodology for Ullmann Cu(I) catalyzed C-N cross coupling reactions using this original catalyst is reported. Coupling reactions of 4-chloropyridinium chloride with anilines containing electron donating (EDG) or electron withdrawing
描述了一种在没有额外稳定配体的情况下制备负载在弱酸性聚丙烯酸酯树脂上的新型稳定 Cu (I) 催化剂的方法。报道了使用这种原始催化剂的 Ullmann Cu (I) 催化 CN 交叉偶联反应的简单有效方法。4-氯吡啶鎓与分别含有给电子 (EDG) 或吸电子 (EWG) 基团、萘-2-胺和哌嗪的苯胺的偶联反应得到了成功证明。
Anticancer-Active <i>N</i>-Heteroaryl Amines Syntheses: Nucleophilic Amination of <i>N</i>-Heteroaryl Alkyl Ethers with Amines
作者:Xia Wang、Qiu-Xia Yang、Cheng-Yu Long、Yan Tan、Yi-Xin Qu、Min-Hui Su、Si-Jie Huang、Weihong Tan、Xue-Qiang Wang
DOI:10.1021/acs.orglett.9b01711
日期:2019.7.5
A mild amination protocol of N-heteroaryl alkyl ethers with various amines is described. This transformation is achieved by utilizing simple and readily available base as promoter via C–O bond cleavage, offering a new amination strategy to access several anticancer-active compounds. This work is highlighted by the excellent functional group compatibility, scalability, wide substrate scope, and easy
Selective Functionalization of Aminoheterocycles by a Pyrylium Salt
作者:Daniel Moser、Yaya Duan、Feng Wang、Yuanhong Ma、Matthew J. O'Neill、Josep Cornella
DOI:10.1002/anie.201806271
日期:2018.8.20
The functionalization of aminoheterocycles by using a pyrylium tetrafluoroborate reagent (Pyry‐BF4) is presented. This reagent efficiently condenses with a great variety of heterocyclic amines and primes the C−N bond for nucleophilic aromatic substitution. More than 60 examples for the formation of C−O, C−N, C−S, or C−SO2R bonds are disclosed herein. In contrast to C−N activation through diazotization
Nickel Dual Photoredox Catalysis for the Synthesis of Aryl Amines
作者:Ryan J. Key、Aaron K. Vannucci
DOI:10.1021/acs.organomet.8b00121
日期:2018.5.14
of coupling amines with aryl halides in good to excellent yields. Furthermore, it was found that these reactions are functional under ambient conditions with catalyst loadings of 1 mol %. Spectroscopic studies provide support that this amination mechanism proceeds via a nitrogen-based radical intermediate. This N-radical mechanism offers direct synthetic access to di- and triaryl amines from nickel
An I2-mediated N–Ncoupling reaction has been established for oxidative dimerization of N-aryl aminopyridines to a variety of novel hydrazine derivatives under mild conditions. This synthetic method does not require use of transition metals and can be conveniently carried out on a gram scale. It is also applicable to diphenylamine and N-alkyl aniline substrates.