Graphene based magnetic nanohybrids as promising catalysts for the green synthesis of β-amino alcohol derivatives

Design of a Schiff Base Complex of Copper Coated on Epoxy-Modified Core–Shell MNPs as an Environmentally Friendly and Novel Catalyst for the One-Pot Synthesis of Various Chromene-Annulated Heterocycles

“…In the last decades, the synthesis and application of Schiff base complexes along with various ligand-coated core–shell magnetic nanoparticles in various sciences such as pharmaceutical and industrial fields have gained significant attention due to Schiff base complexes having a variety of advantages such as chemical inertness, high surface-to-volume ratios, environmentally friendly nature, proper thermal stability, nontoxicity, effectuality, easy separability and reusability, and also merit to design for various uses. − …”

Ring Opening of Epoxides and Aziridines with Benzotriazoles Using Magnetically Retrievable Graphene Based (CoFe@rGO) Nanohybrid

“…In direction of our efforts to develop an efficient, green and environmentally methodology, herein we reported a new, facile and eco‐friendly methodology for the synthesis of β‐hydroxytriazole and β‐ N ‐tosylsulfonamidetriazole derivatives via ring opening reaction of epoxides and aziridines respectively in the presence of CoFe@rGO nanohybrid as heterogeneous catalyst in good to excellent yields under solvent free reaction conditions. In our previous study, [66] we optimized the reaction conditions for ring opening of epoxide with aniline in the presence of magnetically retrievable Graphene based nanohybrids. For optimization of reaction conditions, Graphene based nanohybrids in different compositions such as CoFe@rGO (5 %), CoFe@rGO (10 %), CoFe@rGO (15 %) and CoFe@rGO(20 %) were synthesized and tested under solvent free conditions.…”

“…As part of our continuing interest in developing the synthesis of magnetic retrievable nanohybrid and functionalization of magnetic nanoparticles with rGO for efficient, environmentally benign and green ring opening reaction of epoxides and aziridines with several nucleophiles, [63–66] a rapid preparation of β‐hydroxytriazoles and β‐ N ‐tosylsulfonamide triazoles catalyzed by Graphene based nanohybrid (CoFe@rGO) in good to excellent yields within minutes under solvent free and mild reaction conditions was attempted. As compared to other conventional catalysts, CoFe@rGO nanohybrid exhibited better stability, negligible leaching, good recyclability, and no deactivation of the nanohybrid catalyst.…”

Synthesis of Benzenesulfonamide Derivatives via Ring Opening of Aziridines in the Presence of Magnetically Retrievable Graphene Based (CoFe@rGO) Nanohybrid

“…A simplistic hydrothermal methodology was employed for the fabrication of CoFe@rGO nanohybrid as depicted in Scheme 1 [30]. In our previous work [24], cobalt ferrite and rGO based heterogeneous catalysts were examined for their catalytic activity for the ring opening of epoxides and it was inferred that 20 wt % loading of cobalt ferrite in rGO showcased best catalytic performance. So, for the present work, the relative quantity of cobalt ferrite was xed to 20 wt % to that of GO.…”

“…Therefore, rGO has proved to be a competent material for a wide range of catalytic reactions such as Friedel-Craft acylation, hydrogenation, ring opening reaction of epoxides, oxidation-reduction reactions, aerobic oxidation of alcohol etc. [24][25][26]. However, the separation of rGO from the reaction mixture without causing any secondary pollution has remained a challenge for research community [27].…”