Synthesis of Fe3O4-DOPA-Cu Magnetically Separable Nanocatalyst: A Versatile and Robust Catalyst for an Array of Sustainable Multicomponent Reactions under Microwave Irradiation

Synthesis and Reactivity of Copper and Copper Containing Magnetically Separable Catalysts

“…Kumari et al . reported a facile route for the synthesis of Copper loaded L‐DOPA functionalized magnetite Np's (Fe 3 O 4 ‐DOPA−Cu NP's) and their high catalytic activity towards some important multicomponent reactions under microwave irradiation (entry 7) [21] . Ledari et al .…”

“…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).…”

Pd(0)‐guanidine@MCM‐41: a very effective catalyst for rapid production of bis (pyrazolyl)methanes

“…That is important from the atom economic standpoint . Environmental friendly operation via reducing the number of synthetic steps and work up, the energy consumption, reaction time, waste production, and eliminating the isolation of unstable intermediates are among the advantages of MCRs . Over the last few decades, with increasing environmental concerns, the design of new MCRs with ecofriendly, green procedures have become increasingly useful tools, especially in the fields of drug discovery, organic synthesis and material science .…”

“…[30] Environmental friendly operation via reducing the number of synthetic steps and work up, the energy consumption, reaction time, waste production, and eliminating the isolation of unstable intermediates are among the advantages of MCRs. [20,21,[31][32][33][34] Over the last few decades, with increasing environmental concerns, the design of new MCRs with ecofriendly, green procedures have become increasingly useful tools, especially in the fields of drug discovery, organic synthesis and material science. [35][36][37] Because of the increasing concern of the harmful effects of organic solvents on the environment and human body, organic reactions that are operated with green solvents or without conventional organic solvents have aroused the attention of organic and medicinal chemists.…”

Magnetized inorganic–bioorganic nanohybrid [nano Fe3O4‐SiO2@Glu‐Cu (II)]: A novel nanostructure for the efficient solvent‐free synthesis of thiazolidin‐2‐imines

“…Multilayered organic-inorganic hybrids based on magnetite gained significant attention due to special properties such as high thermal stability, high surface area that causes predominant reactivity, comprehensive and efficient catalytic power due to synergetic effect of both organic and inorganic parts attendance, low toxicity, and excellent recyclability and easy separation from the reaction mixture using an external magnet. Recently, many kinds of these core-shell hybrids have been utilized to promote various types of multicomponent organic transformations, [19][20][21] aerobic N-alkylation of amines, [22] nitroarene reduction, [23] and degradation of organic contaminants. [24] In most of these composites, the Fe 3 O 4 nanoparticles (NPs) were coated with inorganic oxides in order to avoid agglomeration and let the core to be stabilized.…”