Preparation of magnetically recyclable ZnFe₂O₄ nanoparticles by easy single‐step co‐precipitation method and their catalytic performance in the synthesis of 2‐aminothiophenes

Abstract

In this work, a new synthetic route for the preparation of ZnFe2O4 nanoparticles through the chemical co‐precipitation using Fe2+ and Fe3+ ions in an alkaline solution was developed. The synthesized nanoparticles were characterized by XRD, FTIR, SEM, ICP‐MS, DRS, TGA, VSM and elemental analysis. Characterization results confirmed the formation of single ZnFe2O4 phase, with an average particle size of 40 nm and a high saturation magnetization of 34 emu g−1. The prepared material was employed as a catalyst for the synthesis of 2‐aminotiophene derivatives through the Gewald reaction. This thermally and chemically stable nanocatalyst is environmentally benign, economical and reusable which can be easily recovered using an external magnet. Therefore, it appears that this methodology can be simply extended for industrial purposes.

The dual role of ammonium acetate as reagent and catalyst in the synthesis of 2, 4, 5-triaryl-1H-imidazoles

“…In connection with our ongoing work on the synthesis of various heterocyclic compounds [22][23][24][25][26][27][28][29], we wish to report a facile procedure for preparation of imidazole derivatives without addition of any specific catalyst. As mentioned above, several methods are introduced for the synthesis of trisubstitutedimidazoles and their derivatives.…”

Nio Nanoparticles: A Highly Efficient Catalyst for the One-Pot Three- Component Synthesis of Pyrano [2, 3-D] Pyrimidine Derivatives in Green Reaction Media

“…According to some researchers, a number of nano-materials such as the metals metal oxides and NPs with semi-conductor properties could be utilized in organic chemistry as catalysts [25,26].…”

NiO Nanoparticles: A Highly Efficient Catalyst For One-Pot Three-Component Synthesis of Pyrano[2, 3-d]Pyrimidine Derivatives in Green Media

“…According to some researchers, a number of nano-materials such as the metals metal oxides and NPs with semi-conductor properties could be utilized in organic chemistry as catalysts [25,26].…”