Palladium and copper-supported on charcoal: A heterogeneous multi-task catalyst for sequential Sonogashira–Click and Click–Heck reactions
摘要:
This paper describes the development of one-pot sequential Sonogashira-Click and Click-Heck reactions by using Pd-Cu/C as a heterogeneous multi-task catalyst for the synthesis of heterocyclic structures. Details of the optimization studies and the substrate scope are discussed. These methodologies allow the preparation of functionalized triazoles in simple experimental conditions with inexpensive reagents. (C) 2014 Elsevier B. V. All rights reserved.
Copper-polymer nanocomposite: An efficient catalyst for green Huisgen click synthesis
作者:Alexander V. Zuraev、Yuri V. Grigoriev、Vladislav A. Budevich、Oleg A. Ivashkevich
DOI:10.1016/j.tetlet.2018.03.028
日期:2018.4
A new method for Huisgen [3+2] cycloadditionsynthesis of 1,4- and 1,4,5-substituted-1H-1,2,3-triazoles was reported. The reaction was catalyzed by the product of thermolysis of copper (II) poly-5-vinyltetrazolate. Heterogeneous catalyst includes copper nanoparticles which supported on polymeric matrix. It presents recovered and recycled catalyst and the catalyzed reaction proceeds in aerobic conditions
报道了一种新的Huisgen [3 + 2]环加成合成1,4-和1,4,5-取代的-1 H -1,2,3-三唑的新方法。该反应由聚(5-乙烯基四唑酸铜)铜(II)的热解产物催化。非均相催化剂包括负载在聚合物基质上的铜纳米颗粒。它提供了回收和再循环的催化剂,催化反应在需氧条件下于室温在水性介质中进行。
A Highly Active and Magnetically Recoverable Tris(triazolyl)-Cu<sup>I</sup>Catalyst for Alkyne-Azide Cycloaddition Reactions
Nanoparticle‐supported tris(triazolyl)–CuBr, with a diameter of approximately 25 nm measured by TEM spectroscopy, has been easily prepared, and its catalytic activity was evaluated in the copper‐catalyzed azide–alkyne cycloaddition (CuAAC) reaction. In initial experiments, 0.5 mol % loading successfully promoted the CuAAC reaction between benzyl azide and phenylacetylene, in water at room temperature
Synthesis of a heterogeneous Cu(OAc)<sub>2</sub>-anchored SBA-15 catalyst and its application in the CuAAC reaction
作者:Nan Sun、Zhongqi Yu、Hong Yi、Xiayue Zhu、Liqun Jin、Baoxiang Hu、Zhenlu Shen、Xinquan Hu
DOI:10.1039/c7nj04495j
日期:——
A dinuclear Cu(OAc)2-anchored SBA-15 silica was synthesized, confirmed and showed excellent catalytic activity for the azide–alkyne cycloaddition reaction in water.
The Sequential Sonogashira-Click Reaction: A Versatile Route to 4-Aryl-1,2,3-triazoles
作者:Zoltán Novák、Krisztián Lőrincz、Péter Kele
DOI:10.1055/s-0029-1216985
日期:2009.10
Aryl halides can be easily transformed in a one-pot procedure into 4-aryl-1,2,3-triazoles with palladium/copper-catalyzed Sonogashira-click reaction sequence, using trimethylsilylacetylene as acetylene surrogate.
cycloaddition (CuAAC) clickchemistry where their complexation abilities enable them to act either as heterogeneous clickcatalysts when used in their complexed form or as copper(I) scavengers when used in their uncomplexed form. In the first instance, they proved to be robust and efficient heterogeneous catalysts to promote click reactions using extremely low doses and showing negligible copper leaching, particularly