An iron Schiff base complex loaded mesoporous silica nanoreactor as a catalyst for the synthesis of pyrazine-based heterocycles

Synthesis of heterocycles and fused heterocycles catalyzed by nanomaterials

“…These reactions proceeded in water with excellent yields 66. These reactions proceeded in water with excellent yields 66.…”

Reusable nano-catalyzed green protocols for the synthesis of quinoxalines: an overview

“…The catalyst showed good activity and high selectivity yield and was easily recycled taking advantage of the magnetic property (Scheme 8). 93 Azizi's group developed a magnetic nanoparticle with high multifunctional acidic groups by anchoring water-soluble 5-sulfosalicylic acid onto the surface silica-modified Fe 3 O 4 (Fe 3 O 4 @SiO 2 @5-SA) for the synthesis of quinoxaline derivatives from direct condensation of substituted 1,2-diamine with various 1,2-dicarbonyl in ethanol at rt with excellent yield. The catalyst sizes of the MNPs were not precisely identical and showed core–shell morphology in various sizes, constructed by some nanoparticles and the size of the MNPs particles was well below 80 nm.…”

Synthesis, characterization of mixed- ligand complexes containing 2,2-Bipyridine and 3-aminopropyltriethoxysilane

“…By regard ethoxy silane is less reactive than methoxy silane due to non-produce toxic ethanol while the other compound formed toxic methanol [8] . The reaction of the 3-Aminopropyltriethoxysilane (3-APTES) with transition metal ions must be performed in non-aqueous phase such as dry ethanol or dry benzene or hexane to avoid the hydrolysis of 3-APTES to ethanol and trisilanol [9][10] . 3-APTES can be used in the general reaction for synthesis functionalized ligands such as reaction of salicylaldehyde with 3-aminopropyltriethyoxysilane.…”