Copper-Catalyzed Huisgen and Oxidative Huisgen Coupling Reactions Controlled by Polysiloxane-Supported Amines (AFPs) for the Divergent Synthesis of Triazoles and Bistriazoles
click reactions mediated by a polysiloxane‐supported secondary amine allow the preparation of novel heterocyclic compounds, that is, bistriazoles. Comparably, it is also surprising that the use of a diamine‐functional polysiloxane as ligand led to a classic Huisgen [3+2] cycloaddition in excellent yields. From the results of the present amine‐functional polysiloxanes‐controlledHuisgenreaction or oxidative
Highly active copper-catalysts for azide-alkynecycloaddition
作者:Zsombor Gonda、Zoltán Novák
DOI:10.1039/b920790m
日期:——
Bis-triphenylphosphano complexes of copper(I)-carboxylates serve as efficient catalysts for azide-alkyne cycloaddition. The triazole formation takes place straightforwardly at ambient temperature providing a wide variety of products with good yields in the presence of 0.005–0.05% catalyst.
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。
An efficient and recyclable thiourea-supported copper(<scp>i</scp>) chloride catalyst for azide–alkyne cycloaddition reactions
作者:Milan Kr. Barman、Ashish Kumar Sinha、Sharanappa Nembenna
DOI:10.1039/c5gc02545a
日期:——
A reaction between two equivalents of bulky thiourea i.e., 1-3-bis(2,6-dimethylphenyl)thiourea(L) [L = (ArNH)2C=S); (Ar = 2,6-Me2C6H3)}] and CuCl2 or CuCl in THF solvent afforded a bulky thiourea stabilized copper(I) halide...
Copper-catalyzed carbon–carbon bond cleavage of primary propargyl alcohols: β-carbon elimination of hemiaminal intermediates
作者:Ye-Won Kang、Yu Jin Cho、Kwang-Youn Ko、Hye-Young Jang
DOI:10.1039/c5cy00783f
日期:——
The copper-catalyzed cleavage of carbon–carbon bonds in primary propargyl alcohols under oxygen was investigated. This process involves the formation and fragmentation of hemiaminals from aldehydes (oxidized alcohols) and amines. This reaction mechanism was supported by the formation of N-formyl amines and GC experimental results.