Ionic liquid immobilized onto fibrous nano-silica: A highly active and reusable catalyst for the synthesis of quinazoline-2,4(1H,3H)-diones

Synthesize of dendritic fibrous nano-silica functionalized by cysteine and its application as advanced adsorbent

“…The XRD patterns of KCC-1, KCC-1-NH 2 , and KCC-1-NH 2 -Cys were performed from 3.0 (2h) to 70.0 (2h) (Supporting information Figure S5 (see supporting information)) to test the crystallinity of the produced KCC-1-based nanomaterials where two major peaks could be observed, indicating that the crystallinity increased from KCC-1 to KCC-1-NH 2 -Cys. The broad peak at 20 and 30 is assigned to the amorphous silica [30]. Also, compared to the KCC-1, the KCC-1-NH 2 and KCC-1-NH 2 -Cys patterns were shifted to the higher 2h values which are again an indication of the surface functionalization of KCC-1.…”

A decennary update on applications of metal nanoparticles (MNPs) in the synthesis of nitrogen- and oxygen-containing heterocyclic scaffolds

“…IL immobilized on KCC-1-catalyzed carboxylation of o-amino benzonitrile (6n) for the synthesis of quinazoline-2,4-diones (242b) (Scheme 189) was reported by Sadeghzadeh et al 337 The prepared KCC-1 was silylated with 3-chloropropyltriethoxysilane followed by the loading of hexamethylenetetramine using sodium borohydride and potassium hydroxide. A comparison of the textual parameters of KCC-1 and KCC-1/IL revealed that the IL-loaded SiNPs possess a ner pore size, volume and surface area, which increased their catalytic capacity.…”

C–C and C–H coupling reactions by Fe3O4/KCC-1/APTPOSS supported palladium-salen-bridged ionic networks as a reusable catalyst

“…It has a high surface area with improved accessibility to the internal surface, tunable pore size and pore volume, controllable particle size, and, importantly, improved stability. [11][12][13][14][15][16][17][18][19][20] In recent years, magnetic nanoparticles of iron oxide (Fe 3 O 4 ) have been widely used as a heterogeneous catalyst in organic reactions because they are cheap, available, low toxicity, recyclable and easy to separate from the reaction solution using a magnet. 21,22 Lately, organometallic ionic complexes (OICs) have emerged as very marvelous catalysts because they can be created from readily available and highly tailorable metal and ligand forerunners for multifunctional integration.…”