Nickel ferrite nanoparticles doped on hollow carbon microspheres as a novel reusable catalyst for synthesis of N-substituted pyrrole derivatives

Abstract

Pyrroles are widely spread worldwide because of their critical applications, especially pharmacology. An expedition method for one-pot synthesis of N-substituted pyrrole derivatives has been presented by a reaction between 2,5-dimethoxytetrahydrofuran and various primary aromatic amines in the presence of NiFe2O4 anchored to modified carbon hollow microspheres (NiFe2O4@MCHMs) as a recoverable reactive catalyst. The Classon-Kass method has been used to synthesize the pyrroles in excellent yields and short reaction times in the same direction with green chemistry rules. This reaction was carried out by employing NiFe2O4@MCHMs as a catalyst to make a simple procedure with short activation energy in water as an accessible, non-toxic, and biodegradable solvent. This catalyst provides a promising pathway to synthesize N-substituted pyrroles several times in a row through the recyclability without remarkable loss of its catalytic activity. The NiFe2O4@MCHMs nanocatalyst was characterized by applying FT-IR, XRD, FE-SEM, TEM, EDS, BET, TGA, VSM, and elemental mapping techniques. Also, the synthesized N-substituted pyrrole derivatives were identified using melting point, FT-IR, and 1H NMR analyses.

Unraveling the Adsorption Behavior of Thymol on Carbon and Silica Nanospheres for Prolonged Antibacterial Activity: Experimental and DFT Studies

“…SiO 2 @C showed vibration peaks at 1100–1080, 760, and 450 cm –1 assigned to the asymmetric and symmetric stretching and bending modes of Si–O–Si, respectively, as the characteristics of the silica core . After removing the silica core of HC by NaOH etching, these silica characteristics were completely invisible by FTIR, indicating the successful removal of the silica core. , After the impregnation of thymol on the nanosphere surfaces, vibrational bands were observed at 1417 and 804 cm –1 , related to the phenyl ring . This FTIR result indicated that thymol was successfully introduced onto the surfaces of the carbon-based nanospheres.…”

“… 19 After removing the silica core of HC by NaOH etching, these silica characteristics were completely invisible by FTIR, indicating the successful removal of the silica core. 20 , 21 After the impregnation of thymol on the nanosphere surfaces, vibrational bands were observed at 1417 and 804 cm –1 , related to the phenyl ring. 22 This FTIR result indicated that thymol was successfully introduced onto the surfaces of the carbon-based nanospheres.…”

Preparation and characterization of copper ferrite functionalized graphitic carbon nitride nanocomposite as an efficient and reusable catalyst for synthesis of spirooxindol quinazolinone derivatives

“…Our research team is currently engaged in the study of catalytic reactions as part of our ongoing research efforts [27][28][29][30] , this study investigated the fabrication and identi cation of CuFe 2 O 4 /g-C 3 N 4 nanocomposite in simple procedure. Moreover, the application of this nanocomposite was carried out as effective reusable catalyst for synthesis of spirooxindol quinazolinone derivatives under mild conditions.…”

Fabrication and characterization of inorganic–organic hybrid copper ferrite anchored on chitosan Schiff base as a reusable green catalyst for the synthesis of indeno[1,2-b]indolone derivatives

“…In continuation of our ongoing research works on catalytic reactions, 26–31 in this work, we chose to look into the straightforward and efficient synthesis of indeno[1,2- b ]indolones utilizing a novel effective heterogeneous nanocatalyst. Initially, copper ferrite nanoparticles were prepared by the co-precipitation method; then, the magnetic nanoparticles of the CuFe 2 O 4 @CS-SB nanocomposite were prepared by chelating on the surface of chitosan and a Schiff base.…”