Magnetic Nano-Fe₃O₄-Supported 1-Benzyl-1,4-dihydronicotinamide (BNAH): Synthesis and Application in the Catalytic Reduction of α,β-Epoxy Ketones

Abstract

A novel magnetically recoverable organic hydride compound was successfully constructed by using silica-coated magnetic nanoparticles as a support. An as-prepared magnetic organic hydride compound, BNAH (1-benzyl-1,4-dihydronicotinamide), showed efficient activity in the catalytic reduction of α,β-epoxy ketones. After reaction, the magnetic nanoparticle-supported BNAH can be separated by simple magnetic separation which made the separation of the product easier.

The synthesis of polysubstituted pyridines using nano Fe3O4 supported hydrogensulfate ionic liquid

“…2b), in comparison with pure MNP peaks (Fig. 2a), the peaks from amorphous silica at 2h = 20-30 demonstrate successful coating of Fe 3 O 4 nanoparticles with SiO 2 [39]. The XRD pattern of MNP-[pmim]HSO 4 (Fig.…”

“…1. Peaks from pure magnetic nanoparticles appeared at approximately 590 cm -1 , ascribed to Fe-O stretching, 3,420 cm -1 , ascribed to stretching vibration of physisorbed water, and, potentially, surface hydroxyl groups, and 1,630 cm -1 , ascribed to deformation vibration of bonded O-H [39] (Fig. 1a).…”

“…General procedure for synthesis of the catalyst Silica-coated magnetite nanoparticles (Fe 3 O 4 @SiO 2 ) were prepared as described elsewhere [39,40]. The ionic liquid 1-methyl-3-(trimethoxysilyl)propyl imidazolium chloride ([pmim]Cl) was synthesized as described elsewhere [41].…”

Application of Fe3O4@Silica Sulfuric Acid as a Magnetic Nanocatalyst for the Synthesis of Rhodamine Derivatives

“…Sulfonic acid functionalized silica‐coated magnetite nanoparticles have emerged as robust and high‐surface‐area heterogeneous catalyst which exhibits high reactivity giving high product yields. Fe 3 O 4 @SiO 2 ‐SO 3 H has been extensively employed in a variety of important organic reactions including C−C couplings, additions, substitutions, reductions, oxidations and multicomponent reactions with a high catalytic activity keeping catalytic efficiency intact after many repeated cycles …”

Novel Ionic Tagged Amine Anchored on Magnetic Nanoparticles: An Efficient and Magnetically Recyclable Catalyst for Phospha-Michael Addition

“…Numerous functionalized MNPs have been employed as catalysts in C-C coupling reactions [32][33][34], Ritter reaction [35], stereospecific epoxidation [36], cyanosilylation of carbonyl compounds [37], Knoevenagel condensation [38], Friedlander reaction [39], reduction of a,b-epoxy ketones [40], multicomponents reactions [41], selective hydrogenation [42], and asymmetric Michael addition [43]. Recently, Sobhani and his coworkers reported a pyridine catalyst anchored on nano c-Fe 2 O 3 and its application in the preparation of b-phosphonomalonates using a,bunsaturated malonates as starting materials [44].…”