A PANI-Fe₃O₄@ZnO nanocomposite: a magnetically separable and applicable catalyst for the synthesis of chromeno-pyrido[d]pyrimidine derivatives

Abstract

A PANI-Fe3O4@ZnO nanocomposite is used to prepare a series of novel chromeno-pyrido[d]pyrimidine derivatives in an aqueous medium at room temperature.

An effective and eco‐friendly sonochemical multicomponent synthesis of trisubstituted imidazoles via modified silica‐coated cobalt ferrite nanoparticles by tungstic acid

“…[2,[24][25][26] Magnetic nanoparticles (MNPs) have a specific position in the field of nanocatalyst because of their incomparable properties, such as small size, large surface area-to-volume ratio, excellent magnetic properties, and surface modifiability. [27][28][29][30] The exterior shell-priming of MNPs with hydrophobic silanes, such as tetraethylorthosilicate (TEOS), has attracted great attention because it boosts the nanoparticles' (NPs) constancy in aqueous solutions, separates interparticle, minimizes degradation, and provides an appropriate surface for further modifications. [31][32][33][34] The design and preparation of benign, separable, reusable, and not moisture-sensitive Bronsted/Lewis solid acid nanostructured catalyst is the most important item of green chemistry principles.…”

Efficient Fe3O4@TiO2 Composite Nanoparticles Catalyzed Synthesis of Novel Azo Xanthene Dyes with Promising Antimicrobial Activity

“…[19][20][21][22][23][24] Moreover, doping of Fe 3 O 4 magnetic nanoparticles (MNPs) in the synthesis of bimetallic core/shell compposite nanocatalyst can be a valid choice to support the efficiency, and simplicity of catalyst separation. [25][26][27][28][29][30] The catalytic activity of titanium dioxide doped with Fe 3 O 4 MNPs has been greatly improved. [31] Due to its combination of properties, a particularly desirable example is Fe 3 O 4 @TiO 2 composite nanoparticles.…”

A comprehensive review on synthesis of dihydropyrimidione via Biginelli reaction catalyzed by reusable magnetic nanocatalyst (from 2020–till date)

“…To develop environmentally friendly processes in green synthetic chemistry, the fusion of magnetic nanocatalysts and MCRs will emerge into a new strategic research area. Numerous studies have published research that shows combining MCRs and nanocomposites in ambient reaction circumstances provides improved results with high efficiency for organic synthesis and transformation, such as organic transformation [ 9 ] ; pyranopyrazole and pyranopyrimidine derivatives [ 10 ] ; mono and bis spiro pyrazolopyridines [ 11 ] ; tetrahydrobenzo[a]xanthene‐11‐ones [ 12 ] ; amidoalkyl naphthols [ 13 ] ; xanthene derivatives [ 14 ] ; cross‐aldol condensation [ 15 ] ; 2‐amino‐4 H pyran derivatives [ 16 ] ; [1,3]‐oxazole and 1 H ‐pyrrolo‐[1,3]‐oxazole derivatives [ 17 ] ; 6‐amino‐5‐[(4‐hydroxy‐2‐oxo2 H ‐chromen‐3‐yl)(aryl)methyl]‐1,3‐dimethyl‐2,4,6(1 H ,3 H )‐pyrimidinedione derivatives [ 18 ] ; chromeno‐pyrido[ d ]pyrimidine derivatives [ 19 ] ; spiro[indole‐quinazoline] derivatives [ 20 ] ; cyclocondensation reaction of 4‐hydroxycoumarin, 3,4‐methylenedioxyphenol, and aromatic aldehydes [ 21 ] ; azo chromene dyes [ 22 ] ; cyanopyrroloazepine derivatives [ 23 ] ; 1,3‐dipolar cycloaddition reaction [ 24 ] ; 2,4,5‐triaryl‐1 H ‐imidazoles [ 25 ] ; quinazolinone derivatives [ 26 ] ; tetrahydrobenzoxanthenones [ 27 ] ; α‐aminonitriles [ 28 ] ; chromenes derivatives [ 29,30 ] ; α‐aminonitriles and 2‐methoxy‐2‐phenylacetonitrile derivative via Strecker‐type reaction [ 31 ] ; dihyropyrimidiones [ 32 ] ; dihydroquinazolinone, octahydroquinazolinone, and benzimidazoloquinazolinone derivatives [ 33 ] ; quinazolines [ 34 ] ; 1‐thioamidoalkyl‐2‐naphthols [ 35 ] ; hexahydroquinoline [ 36 ] ; benzoxanthenes [ 37 ] ; and polyhydroquinoline. [ 38 ]…”