Gallic acid grafted to amine‐functionalized magnetic nanoparticles as a proficient catalyst for environmentally friendly synthesis of α‐aminonitriles

Abstract

An effective approach of one‐pot catalytic Strecker reaction between aromatic aldehydes, aniline or toluidine and trimethylsilyl cyanide in the presence of amine‐functionalized Fe3O4@SiO2 nanoparticles grafted with gallic acid (GA) as a powerful catalyst was developed. The fabricated reusable catalyst demonstrated high efficiency in the synthesis of α‐aminonitriles along with facile work‐up procedure. Fe3O4@SiO2‐NH2‐GA was characterized by Fourier transform‐infrared spectroscopy, scanning electron microscopy image, vibrating‐sample magnetometer curve, energy‐dispersive X‐ray analysis and thermogravimetric analysis.

Effective catalytic approach of NiTiO3 photosonocatalyst for the synthesis of indazolo[3,2‐b]quinazoline and its photophysical property

“…Our goal was to develop a highly efficient system based on a simple, widely available, inexpensive and environmentally benign nickel source, ideally functional under neat conditions and able to facilitate the coupling of challenging and synthetically interesting substrates. [ 50–52 ]…”

“…Our goal was to develop a highly efficient system based on a simple, widely available, inexpensive and environmentally benign nickel source, ideally functional under neat conditions and able to facilitate the coupling of challenging and synthetically interesting substrates. [50][51][52] To reduce the energy consumption and synthetic time, a sonochemical synthesis is more attractive for the preparation of various organic molecules. Our work is primarily focused on the straight forward approach towards domino strategy to indazolo[3,2-b]quinazolines derivatives 4(a-u), via Claisen-Schmidt condensation, Michael addition, nucleophilic endocyclic attack and oxidation utilizing visible light coupled with ultrasonication.…”

Ultrasound promoted and Kit‐6 mesoporous silica‐supported Fe3O4 magnetic nanoparticles catalyzed cyclocondensation reaction of 4‐hydroxycoumarin, 3,4‐methylenedioxyphenol, and aromatic aldehydes

“…[11] As catalysts, magnetic nanoparticles (MNPs) are found to be recyclable and easily separable for expedient synthetic approaches to the production of important organic compounds. [12][13][14][15] The efficiency of iron oxide nanoparticles as MNPs immobilized or supported on mesoporous materials like silica, [16][17][18][19][20] SBA-15, [21] and organic-inorganic hybrid [22] has been preferably expanded in the field of catalysis. Among different supported MNPs, Kit-6 mesoporous silica-supported Fe 3 O 4 MNPs (Fe 3 O 4 @SiO 2 @Kit-6) has also been emerged as a powerful catalyst because it has preferable properties such as small dimensions, uniform porosity, high chemical stability, and easy magnetic separability.…”

Heterogenized magnetic graphene oxide‐supported N6‐Schiff base Cu (II) complex as an exclusive nanocatalyst for synthesis of new pyrido[2,3‐d]pyrimidine‐7‐carbonitrile derivatives

“…Moreover, easy and eco‐friendly separation of the magnetic nanoparticles (MNPs) from the reaction mixtures by using magnetic field refrains their grueling separation by centrifugation or filtration. [ 22–32 ] Recently, some specific studies have been conducted on these ferromagnetic materials based on their biotechnological and biomedical properties. Fe 3 O 4 ‐based magnetic nanoparticles have been the issue of major interest owing to their catalytic activity, biocompatibility, and low toxicity.…”