One‐pot synthesis of spiro‐acridine/indoline and indoline derivatives using (MWCNTs)‐COOH/La₂O₃ hybrid as an effective catalyst

Abstract

Spiro‐acridine/indoline and indoline derivatives were synthesized by the three‐component reaction of isatin, dimedone, and amines or amino acids in the presence of acid‐functionalized multiwalled carbon nanotubes/La2O3 (MWCNTs)‐COOH/La2O3 hybrid (5 mol%) as a highly efficient catalyst in ethanol. The assigned structure was further established by CHN analysis, NMR, and FTIR spectra. (MWCNTs)‐COOH/La2O3 was fabricated by the reaction of functionalized (MWCNTs)‐COOH and La(NO3)3.6H2O in acetic acid. Synthesis of La2O3 nanoparticles and their conjugation on the surface of MWCNT have been confirmed by FTIR, scanning electron microscopy, transmission electron microscopy, X‐ray diffraction, and energy‐dispersive X‐ray spectroscopy.

Synthesis of heterostructure ferromagnetic photocatalyst FMMWCNTs@GLYMO@WO3 and its performance for photodegradation of metronidazole and acetaminophen in water

“…High-performance photocatalysts have been manufactured and used recently for rapid and easy pollution removal (Zhang et Moreover, heterostructure nano-catalysts have gained a great deal of attention since they are nontoxic, abundant, easy to use, inexpensive, and capable of removing chemical contaminants, making them a good choice for puri cation processes because of their photocatalytic properties and adsorption properties. In the past few years, combining carbon nanotubes (CNTs) and nanoparticles has given rise to nanostructures possessing exceptional characteristics (Abdoli et al 2021). Among the various types, multi-walled carbon nanotubes have garnered more attention due to their immense potential in a multitude of technological domains, including but not limited to controlled release of drugs, wide surface area, chemical, electrical, and thermal properties, and heterogeneous catalysis (Lu et Ghasemzadeh et al 2020).…”

Synthesis of some derivatives of 1,8-dioxo-octa-hydro xanthene and 9-aryl-hexahydro acridine-1,8-dione using metal ion-exchanged NaY zeolite as heterogeneous catalyst

“… 44 In 2021, Nami et al Synthesized spiro-acridine/indoline and indoline derivatives by the three-component reaction of isatin, dimedone, and amines or amino acids in the presence of acid functionalized multi-walled carbon nanotubes as a catalyst in ethanol. 45 In 2021, Fekri et al Used the effective copper/dapsone nanocomposite of propyl covalent for the multi-component reaction of aldehydes, dimedone and dapsone to synthesize acridines. 46 In 2021, one-pot three-component cyclo-condensation reaction of bis(indole-2,3-diones) with dimedone, 3-methyl-1 H -pyrazol-5(4 H )-one, or 6-aminouracil in boiling acetic acid afforded bis-spirocyclic oxindoles linked to acridine, dipyrazolo[3,4- b :4′,3′- e ]pyridine, and pyrido[2,3- d :6,5- d ′]dipyrimidine, respectively.…”