Silica coated magnetic NiFe2O4 nanoparticle supported phosphomolybdic acid; synthesis, preparation and its application as a heterogeneous and recyclable catalyst for the one-pot synthesis of tri- and tetra-substituted imidazoles under solvent free conditions

RSC Advances ◽  
2015 ◽  
Vol 5 (80) ◽  
pp. 64850-64857 ◽  
Author(s):  
Behrooz Maleki ◽  
Hossein Eshghi ◽  
Amir Khojastehnezhad ◽  
Reza Tayebee ◽  
Samaneh Sedigh Ashrafi ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Nickel Ferrite ◽  
Acid Synthesis ◽  
Phosphomolybdic Acid ◽  
Ferrite Nanoparticles ◽  
One Pot ◽  
Green Catalyst ◽  
Solvent Free Conditions ◽  
Nickel Ferrite Nanoparticles ◽  
The One

A novel heteropolyacid supported on silica coated nickel ferrite nanoparticles (NFS–PMA) was synthesized and used as a green catalyst for one-pot syntheses of tri/tetra-substituted imidazoles. The catalyst could be recycled and reused through application of a magnetic field.

Glutamic Acid as an Efficient and Green Catalyst for the One-Pot Synthesis of 1,2,4,5-Tetrasubstituted Imidazoles under Thermal, Solvent-Free Conditions

2017 ◽  
Vol 41 (11) ◽  
pp. 673-675 ◽  
Author(s):  
Fahimeh Khazaee Feizabad ◽  
Khatereh Khandan-Barani ◽  
Alireza Hassanabadi
Keyword(s):  
Glutamic Acid ◽  
Reaction Times ◽  
Catalytic Amount ◽  
Solvent Free ◽  
One Pot ◽  
Green Catalyst ◽  
Aryl Aldehydes ◽  
Solvent Free Conditions ◽  
The One ◽  
Tetrasubstituted Imidazoles

A high-yielding synthesis of 1,2,4,5-tetrasubstituted imidazoles is described, involving the reaction of 1,2-dicarbonyl compounds, aryl aldehydes, amines and ammonium acetate in the presence of a catalytic amount of glutamic acid under thermal, solvent-free conditions. The salient features of this protocol are aerobic conditions, a non-hazardous green catalyst, short reaction times and mild reaction conditions.

Nickel ferrite nanoparticles–hydrogen peroxide: a green catalyst-oxidant combination in chemoselective oxidation of thiols to disulfides and sulfides to sulfoxides

RSC Advances ◽  
2014 ◽  
Vol 4 (69) ◽  
pp. 36702 ◽  
Author(s):  
Aparna M. Kulkarni ◽  
Uday V. Desai ◽  
Kapil S. Pandit ◽  
Makarand A. Kulkarni ◽  
Prakash P. Wadgaonkar
Keyword(s):  
Hydrogen Peroxide ◽  
Nickel Ferrite ◽  
Ferrite Nanoparticles ◽  
Green Catalyst ◽  
Nickel Ferrite Nanoparticles

Nickel ferrite nanoparticles: an efficient and reusable nanocatalyst for a neat, one-pot and four-component synthesis of pyrroles

RSC Advances ◽  
2015 ◽  
Vol 5 (23) ◽  
pp. 18092-18096 ◽  
Author(s):  
Firouz Matloubi Moghaddam ◽  
Behzad Koushki Foroushani ◽  
Hamid Reza Rezvani
Keyword(s):  
Multicomponent Reaction ◽  
Nickel Ferrite ◽  
Ferrite Nanoparticles ◽  
Significant Activity ◽  
One Pot ◽  
External Magnet ◽  
Recoverable Catalyst ◽  
Nickel Ferrite Nanoparticles ◽  
Substituted Pyrroles ◽  
Activity Loss

We applied magnetic NiFe2O4 as a recoverable catalyst in the multicomponent reaction of substituted pyrroles. Magnetic NiFe2O4 could be recovered from the reaction easily with an external magnet and reused nine times without significant activity loss. The yields are high.

Nickel Ferrite (NiFe2O4) Nanoparticles as Magnetically Recyclable Nanocatalyst for Highly Efficient Synthesis of 4H-Chromene Derivatives

2020 ◽  
Vol 20 (5) ◽  
pp. 3206-3216 ◽  
Author(s):  
Yaghoub Pourshojaei ◽  
Fatemeh Zolala ◽  
Khalil Eskandari ◽  
Mahshid Talebi ◽  
Laleh Morsali ◽  
...  
Keyword(s):  
Nickel Ferrite ◽  
Condensation Reaction ◽  
Ferrite Nanoparticles ◽  
Efficient Synthesis ◽  
One Pot ◽  
Aryl Aldehydes ◽  
Highly Efficient ◽  
Nano Catalyst ◽  
Nickel Ferrite Nanoparticles ◽  
Magnetically Recyclable Catalyst

An adapted one-pot route to nanocatalyst-assisted synthesis of 4H-chromenes via three component condensation reaction between dimedone, malononitrile, and a broad range of aryl aldehydes by the use of magnetic nickel ferrite nanoparticles is described. By this achievement, not only a novel route to highly efficient synthesis of these series of heterocycles was introduced but also the scope of these medicinally important products was developed via preparation of some novel products. Above all, a new application of nickel ferrite nanoparticles (NiFe2O4 NPs) as highly efficient, green and magnetically recyclable catalyst has been introduced. Overall, obtaining good to excellent yields of products, environmentally and economic benign procedure, easy handling, availability of starting materials, use of non-toxic solvents, and high recyclability of nano-catalyst could be countered as most important advantages of this methodology.

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