scholarly journals Magnetically recoverable catalysts for the preparation of pyridine derivatives: an overview

RSC Advances ◽  
2021 ◽  
Vol 11 (28) ◽  
pp. 17456-17477
Author(s):  
Ghodsi Mohammadi Ziarani ◽  
Zohreh Kheilkordi ◽  
Fatemeh Mohajer ◽  
Alireza Badiei ◽  
Rafael Luque
Keyword(s):  
Reaction Medium ◽  
Pyridine Derivatives ◽  
External Magnet ◽  
Magnetically Recoverable Catalysts ◽  
Recoverable Catalysts ◽  
Nano Catalysts

Magnetically recoverable nano-catalysts can be readily separated from the reaction medium using an external magnet.

Sunlight assisted degradation of dye molecules and reduction of toxic Cr(vi) in aqueous medium using magnetically recoverable Fe3O4/reduced graphene oxide nanocomposite

RSC Advances ◽  
2016 ◽  
Vol 6 (13) ◽  
pp. 11049-11063 ◽  
Author(s):  
Purna K. Boruah ◽  
Priyakshree Borthakur ◽  
Gitashree Darabdhara ◽  
Chaitanya K. Kamaja ◽  
Indrapal Karbhal ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Aqueous Medium ◽  
Reduced Graphene Oxide ◽  
Dye Molecules ◽  
Reduced Graphene ◽  
Magnetically Recoverable Catalysts ◽  
Recoverable Catalysts ◽  
Photocatalytic Applications

In view of the significant impact of magnetically recoverable catalysts in photocatalytic applications, Fe3O4/rGO nanocomposite photocatalyst was synthesized and utilized as an efficient photocatalyst for the degradation of dye molecules and reduction of the toxic Cr(vi).

scholarly journals Cu(II) and magnetite nanoparticles decorated melamine-functionalized chitosan: A synergistic multifunctional catalyst for sustainable cascade oxidation of benzyl alcohols/Knoevenagel condensation

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Zahra Alirezvani ◽  
Mohammad G. Dekamin ◽  
Ehsan Valiey
Keyword(s):  
Catalytic Activity ◽  
Knoevenagel Condensation ◽  
Ambient Pressure ◽  
Reaction Medium ◽  
Environmentally Benign ◽  
One Pot ◽  
Benzyl Alcohols ◽  
External Magnet ◽  
Multistep Synthesis ◽  
Multifunctional Catalyst

AbstractThe uniform decoration of Cu(II) species and magnetic nanoparticles on the melamine-functionalized chitosan afforded a new supramolecular biopolymeric nanocomposite (Cs-Pr-Me-Cu(II)-Fe3O4). The morphology, structure, and catalytic activity of the Cs-Pr-Me-Cu(II)-Fe3O4 nanocomposite have been systematically investigated. It was found that Cs-Pr-Me-Cu(II)-Fe3O4 nanocomposite can smoothly promote environmentally benign oxidation of different benzyl alcohol derivatives by tert-butyl hydroperoxide (TBHP) to their corresponding benzaldehydes and subsequent Knoevenagel condensation with malononitrile, as a multifunctional catalyst. Interestingly, Fe3O4 nanoparticles enhance the catalytic activity of Cu(II) species. The corresponding benzylidenemalononitriles were formed in high to excellent yields at ambient pressure and temperature. The heterogeneous Cs-Pr-Me-Cu(II)-Fe3O4 catalyst was also very stable with almost no leaching of the Cu(II) species into the reaction medium and could be easily recovered by an external magnet. The recycled Cs-Pr-Me-Cu(II)-Fe3O4 was reused at least four times with slight loss of its activity. This is a successful example of the combination of chemo- and bio-drived materials catalysis for mimicing biocatalysis as well as sustainable and one pot multistep synthesis.

scholarly journals Ru-Containing Magnetically Recoverable Catalysts: A Sustainable Pathway from Cellulose to Ethylene and Propylene Glycols

2016 ◽  
Vol 8 (33) ◽  
pp. 21285-21293 ◽  
Author(s):  
Oleg V. Manaenkov ◽  
Joshua J. Mann ◽  
Olga V. Kislitza ◽  
Yaroslav Losovyj ◽  
Barry D. Stein ◽  
...  
Keyword(s):  
Magnetically Recoverable Catalysts ◽  
Recoverable Catalysts

Magnetically recoverable catalysts based on mono- or bis-(NHC) complexes of palladium for the Suzuki–Miyaura reaction in aqueous media: two NHC–Pd linkages are better than one

2016 ◽  
Vol 45 (29) ◽  
pp. 11633-11638 ◽  
Author(s):  
Francisco Martínez-Olid ◽  
Román Andrés ◽  
Ernesto de Jesús ◽  
Juan C. Flores ◽  
Pilar Gómez-Sal ◽  
...  
Keyword(s):  
Magnetic Particles ◽  
Aqueous Media ◽  
Recyclable Catalyst ◽  
Magnetically Recoverable Catalysts ◽  
Recoverable Catalysts ◽  
Pd Complexes ◽  
Better Than

Mono- and bis(NHC) Pd complexes grafted onto magnetic particles are compared as catalysts in the Suzuki–Miyaura reaction in aqueous media. The latter is found to be an outstanding recyclable catalyst.

Magnetically recoverable nickel ferrite (NiFe2O4) nanocatalysts in synthesis of Heterocycles

2020 ◽  
Vol 17 ◽  
Author(s):  
Mosstafa Kazemi
Keyword(s):  
Magnetic Nanoparticles ◽  
Nickel Ferrite ◽  
Heterocyclic Compounds ◽  
Supported Catalysts ◽  
Biological Activities ◽  
Reaction Medium ◽  
Active Materials ◽  
External Magnet ◽  
Academic Effort ◽  
Heterocyclic Molecules

: Heterocyclic compounds are backbone of the most of the pharmaceutical active materials and antibiotics. Heterocyclic molecules have been known to possess valuable biological activities. Magnetic nanoparticles-supported catalysts can be readily separated from reaction medium by using an external magnet, without the need for filtration, centrifugation or other tedious workup processes. Here, in this review we submitted an academic effort to list the nickel ferrite (NiFe2O4 MNPs) nanocatalysts reported in the literature and their activities in synthesis of heterocyclic scaffold molecules.

Ni Nanoparticles Stabilized by Poly(Ionic Liquids) as Chemoselective and Magnetically Recoverable Catalysts for Transfer Hydrogenation Reactions of Carbonyl Compounds

ChemCatChem ◽  
2016 ◽  
Vol 8 (6) ◽  
pp. 1139-1145 ◽  
Author(s):  
Kari Vijayakrishna ◽  
K. T. Prabhu Charan ◽  
Kasina Manojkumar ◽  
Sadhana Venkatesh ◽  
Nellepalli Pothanagandhi ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Carbonyl Compounds ◽  
Transfer Hydrogenation ◽  
Ni Nanoparticles ◽  
Hydrogenation Reactions ◽  
Magnetically Recoverable Catalysts ◽  
Recoverable Catalysts

Eco-friendly synthesis of pyridines via rhodium-catalyzed cyclization of diynes with oximes

2015 ◽  
Vol 17 (2) ◽  
pp. 799-803 ◽  
Author(s):  
Fen Xu ◽  
Chunxiang Wang ◽  
Haolong Wang ◽  
Xincheng Li ◽  
Boshun Wan
Keyword(s):  
Reaction Medium ◽  
Pyridine Derivatives ◽  
Alternative Reaction Medium

We describe a new route for the synthesis of pyridines via [2 + 2 + 2] cycloaddition of diynes and oximes catalyzed by Rh(NBD)2BF4/MeO-Biphep using ethanol as an alternative reaction medium, affording the desired pyridine derivatives in yields of up to 93%.

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