CoFe₂O₄/Cu(OH)₂ magnetic nanocomposite: an efficient and reusable heterogeneous catalyst for one-pot synthesis of β-hydroxy-1,4-disubstituted-1,2,3-triazoles from epoxides

Abstract

Magnetically separable CoFe2O4/Cu(OH)2 nanocomposite was prepared and used as a novel heterogeneous catalyst for synthesis of β-hydroxy-1,4-disubstituted-1,2,3-triazoles from epoxides.

High-performance sono/nano-catalytic system: CTSN/Fe3O4–Cu nanocomposite, a promising heterogeneous catalyst for the synthesis of N-arylimidazoles

“…In chemical catalysis scope, numerous efforts have been made to design and fabricate efficient catalytic systems that include nontoxic materials in their structures and do not need any hazardous reagent for running the catalytic process. 1,2 In recent decade, ultrasound wave (USW) irradiation has been introduced as one of the most effective strategies that can also be considered as a great co-catalyst agent for chemical reactions. 3,4 From both physical and chemical aspects, USW irradiation activates the catalytic sites of the chemicals to enhance the performance of the catalytic systems.…”

Synthesis and Reactivity of Copper and Copper Containing Magnetically Separable Catalysts

“…respectively [21,23,34] . Besides this, various copper‐based magnetic nanoparticles have been magnificently employed as catalysts in the synthesis of 1,2,3‐triazole by other groups [109–111] (Karim, Nageswar, Wang group).…”

“…Simultaneously, Varma and co-workers [76] have reported a good example of the catalytic synthesis of 1,2,3triazoles through three-component reaction of alkyl bromides, sodium azide, and alkynes, by nano ferrite-glutathione-coppercatalystunder microwave irradiation conditions within just 10-20 min.Besides this, CuFe 2 O 4 nanoparticles, copper loaded L-DOPA functionalized magnetite nanoparticlesand copper(II)coated magneticcore-shell nanoparticles Fe 3 O 4 @SiO 2 modified by isatoic anhydride were utilized for the synthesis of1,2,3-triazoles by Kumari,Moghaddamand Aminiet al respectively. [21,23,34] Besides this, various copper-based magnetic nanoparticles have been magnificently employed as catalysts in the synthesis of 1,2,3-triazole by other groups [109][110][111] (Karim, Nageswar, Wang group).…”

Fe3O4@SiO2-PMA-Cu magnetic nanoparticles as a novel catalyst for green synthesis of β-thiol-1,4-disubstituted-1,2,3-triazoles

“…Considering all these aspects, and following our previous studies 62 – 68 , herein we wish to introduce Fe 3 O 4 @SiO 2 -PMA-Cu nanocomposite as an efficient and novel catalyst, whose PMA clusters are found to be anchored on Fe 3 O 4 @SiO 2 surface, and copper nanoparticles are supported on the PMA surface. The new synthesized nanocomposite was utilized in three-component synthesis of β -thiol-1,4-disubstituted-1,2,3 triazoles from sodium azide, thiiranes, and terminal alkynes as a green and recyclable magnetic catalyst (Fig.…”