Superparamagnetic alginate-based nanocomposite modified by L-arginine: An eco-friendly bifunctional catalysts and an efficient antibacterial agent

Preparation, Antibacterial Activity, and Catalytic Application of Magnetic Graphene Oxide‐Fucoidan in the Synthesis of 1,4‐Dihydropyridines and Polyhydroquinolines

“…[4] Recently, carbohydrate‐based marine polymers have been widely used in the construction of nanocomposites, due to their high number of surface functionalities and biocompatibility, making them useful as heterogeneous catalysts. [ 5 , 6 , 7 ] Fucoidan (Fu), one of the most substantial cost‐effective marine polysaccharides originating from brown algae, is a fucose‐rich hygroscopic sulfated polysaccharide containing negative charges, due to its sulfate functional groups, which allow it to form complexes with other molecules of opposite charge. [ 8 , 9 ] Moreover, Fu, built of a backbone of α(1→3)‐ l ‐fucopyranose residues having various substituents, has attracted great attention as capping material to design new nanocomposites.…”

“…Given the importance of 1,4‐dihydropyridine and polyhydroquinoline, and in the framework of our previous research on the use of environment‐friendly natural polysaccharides in the synthesis of potential biologically active compounds. [ 3 , 6 , 7 , 30 , 31 , 32 ] We report herein the catalytic activity investigation of BaFe 12 O 19 @GO@Fu in the synthesis of biologically active and pharmaceutically important 1,4‐dihydropyridine and polyhydroquinoline under reflux in ethanol (Figure 1 b).…”

Collagen-Coated Superparamagnetic Iron Oxide Nanoparticles as a Sustainable Catalyst for Spirooxindole Synthesis

“…Bio-based heterogeneous catalysts, prepared from renewable natural polymers, have received signi cant attention in recent years due to their substantial advantages such as biodegradability, stability, and recyclability. The combination of nanoparticles and biodegradable polymers can result in nano-biocomposites, which have the potential for various catalytic and environmental applications [1][2][3][4][5] .…”

Synthesis, Characterization, and Catalytic Properties of Magnetic Fe3O4@FU: A Heterogeneous Nanostructured Mesoporous Bio-Based Catalyst for the Synthesis of Imidazole Derivatives

“…Meanwhile, marine polysaccharides exhibit a vast variety of structures and could be considered as a novel natural source (Dekamin et al, 2016 ; Alipour et al, 2018 ; Dolatkhah et al, 2019 ). Nanomaterials based on marine polysaccharides have been considered as one of the most important topics of research in recent years, especially in chemical and bio-based research, due to biocompatibility and biodegradability, cheapness, non-toxicity, and abundance (Hemmati et al, 2016 ; Amirnejat et al, 2020a , b , c ). Fucoidan refers to a type of polysaccharide which contains substantial percentages of L-fucose and sulfated ester groups, mainly derived from brown seaweed which has been extensively studied due to its numerous interesting biological activities (Gomez-Zavaglia et al, 2019 ; Zayed and Ulber, 2019 , 2020 ).…”