Synthesis and Characterization of Copper(I)‐Cysteine Complex Supported on Magnetic Layered Double Hydroxide as an Efficient and Recyclable Catalyst System for Click Chemistry Using Choline Azide as Reagent and Reaction Medium
Abstract In this study, Fe 3 O 4 @LDH@cysteine–Cu(I) nanoparticles as a novel and recyclable catalytic system was designed and successfully synthesized. These nanoparticles show high catalytic activity for preparation of the triazole family through reaction of the organic halides with alkynes in the presence of choline azide as reagent and reaction medium. In addition, Fe 3 O 4 @LDH@cysteine–Cu(I)
摘要 在本研究中,设计并成功合成了 Fe 3 O 4 @LDH@半胱氨酸-Cu(I) 纳米粒子作为一种新型可回收的催化体系。这些纳米颗粒在叠氮化胆碱作为试剂和反应介质的情况下,通过有机卤化物与炔烃的反应,对制备三唑族显示出高催化活性。此外,Fe 3 O 4 @LDH@cysteine-Cu(I) 可以很容易地回收和重复使用五次,催化活性没有任何显着损失。图形摘要
Click synthesis of 1,4-disubstituted-1,2,3-triazoles catalysed by CuO–CeO2 nanocomposite in the presence of amberlite-supported azide
A CuO–CeO2 nanocomposite in the presence of amberlite-supported azide has been used for the click synthesis of 1,4-disubstituted-1,2,3-triazoles in good yields. This catalyst can be reused several times without any significant decrease in the catalytic activity.
Copper (II) immobilized on aminated poly(vinyl chloride) as an efficient and retrievable catalyst for the CuAAC reaction in water under mild conditions
作者:Yizong Zhang、Zhuan Zhang、Yang Chen、Yiqun Li
DOI:10.1007/s11164-017-3076-3
日期:2017.12
methods. It was found to catalyze efficiently the CuAAC reaction for the regioselective synthesis of 1,4-disubstituted-1,2,3-triazoles from benzyl halides, phenylacetylenes, and sodium azide in the presence of sodium ascorbate in water to give the corresponding products under mild and environmentally benign conditions. Various benzyl halides containing electron-withdrawing groups and electron-donating
One-pot three-component synthesis of 1,4-disubstituted 1H-1,2,3-triazoles using green and recyclable cross-linked poly(4-vinylpyridine)-supported copper sulfate/sodium ascorbate in water/t-BuOH system
作者:Mohammad Ali Karimi Zarchi、Fatemeh Nazem
DOI:10.1007/s13738-014-0446-2
日期:2014.12
Cross-linked poly(4-vinylpyridine)-supported copper sulfate, [P4-VP]CuSO4 as a green and recyclable, heterogeneous catalyst in the presence of sodium ascorbate (NaAsc), is reported for the regioselective synthesis of 1,4-disubstituted-1,2,3-triazoles from benzyl halides, sodium azide and terminal alkyne in water/t-BuOH (1/1:V/V) at 70 °C. Various alkyl halides and benzyl halides, with electron-withdrawing
Synthesis of 3-Alkoxy-4-Pyrrolin-2-ones via Rhodium(II)-Catalyzed Denitrogenative Transannulation of 1<i>H</i>-1,2,3-Triazoles with Diazo Esters
作者:Alexander N. Koronatov、Nikolai V. Rostovskii、Alexander F. Khlebnikov、Mikhail S. Novikov
DOI:10.1021/acs.orglett.0c02893
日期:2020.10.16
method for the synthesis of densely substituted 4-pyrrolin-2-ones by Rh(II)-catalyzed denitrogenative transannulation of 1-alkyl-4-aryl-1H-1,2,3-triazoles with diazo esters has been developed. The reaction proceeds via an attack of the rhodium-bound carbene at the N2 atom of the triazole and the formation of unstable 3,4-dihydro-1,2,4-triazine, which further undergoes ringcontraction to a 4-pyrrolin-2-one
已经开发了一种通过Rh(II)催化的1-烷基-4-芳基-1 H -1,2,3-三唑与重氮酯的脱氮脱环合成高取代度的4-吡咯啉-2-酮的方法。该反应通过在三唑的N2原子上与铑结合的卡宾的攻击和不稳定的3,4-二氢-1,2,4-三嗪的形成而发生,该化合物进一步经历环收缩成4-吡咯啉-2 -在铑催化下。该方法不适用于在C4处具有伯烷基取代基的1,2,3-三唑,该化合物可提供稳定的1,2,3-三唑-3-鎓烷基化物作为主要产物。