Triethylenetetramine-Grafted Magnetic Graphene Oxide (Fe ₃ O ₄ @GO-NH ₂ ) as a Reusable Heterogeneous Catalyst for the One-Pot Synthesis of 2-Amino-4 H -Benzopyran Derivatives

Recent progress of nanocatalyst in the synthesis of heterocyclic compounds by barbituric acids

“…Most specifications of this pathway contain reusable heterogeneous catalysts, easy separation, green reaction conditions, affordability, high efficiency, and biodegradable. 49 At first, graphene oxide (GO), distilled water, FeCl 2 .4H 2 O, and FeCl 3 .6H 2 O were mixed under ultrasound conditions after adding aqueous media of NH 4 OH (30%). The mixture was exposed to a nitrogen atmosphere for 180 min.…”

“…After the reaction was complete, the magnetic GO was isolated by a magnet, and 1-hydroxy-2,-5-pyrrolidinedione (NHS) and 1-(3-dimethylaminopropyl)-3-ethyl carbodiimide (EDC or EDAC) were added to activate the GO surface (Scheme 2). 49 A proposed mechanism for synthesizing compound 4 is offered in Scheme 3. Knoevenagel condensation of malononitrile 3 with aryl aldehyde 2 using a catalyst is the first step to give intermediate 5.…”

Fast synthesis of [1,2,3]-triazole derivatives on a Fe/Cu-embedded nano-catalytic substrate

“…39–41 Among all magnetic materials, magnetite (Fe 3 O 4 ) is the most important and widely utilized in numerous fields. 42 When engineered into well-defined nanoscale structures, Fe 3 O 4 exhibits vast potential for practical applications in various domains, such as biomolecular separation, 43 chemical sensing, 44 energy storage, 45 catalysis, 46–51 absorption, 52,53 biomedicine/biotechnology, 54–61 and environmental remediation. Fe 3 O 4 MNPs can be synthesized using various methods, such as coprecipitation of Fe 2+ and Fe 3+ , thermal decomposition, microemulsion, and hydrothermal/solvothermal techniques.…”

Facile preparation of covalently functionalized graphene with 2,4-dinitrophenylhydrazine and investigation of its characteristics

“…Reduced graphene oxide has a wide range of applications, including its use in energy storage devices, 30,31 electronic devices, 32 biomedical applications, 33 sensors, 34 membranes, 35 catalysts, 36,37 water purication, 30 etc. However, the presence of these functional groups in GO and R-GO compared to pristine graphene allows the ability to adjust the electrical and optical properties through chemical reactions.…”