Recyclable superparamagnetic Fe3O4 nanoparticles for efficient catalysis of thiolysis of epoxides

Tandem aldol condensation-Diels–Alder-aromatization sequence of reactions: a new pathway for the synthesis of 2-tetralone derivatives

“…In continuation of using heterogeneous 20 catalysts, 29,30 here we introduce a new pathway for efficient synthesis of tetralone derivatives 21 via a tandem aldol condensation-DA-oxidative aromatization sequence, as exemplified in 22 catalyst, which was prepared by using a known procedure, 31 consists of a superparamagnetic 25 core of iron oxide coated with silica and functionalized with 3-aminopropyl-triethoxysilane 1 and was used to produce a new series of polysubstituted tetralone derivatives. Consequently, 2 single products are obtained in high yields and the nanocatalyst is recoverable 32,33 so that it 3 can be recycled into the next reactions without considerable loss of its efficiency.…”

Preparation, characterization and catalytic application of molybdenum Schiff‐base complex immobilized on silica‐coated Fe3O4 as a reusable catalyst for the synthesis of pyranopyrazole derivatives

“…A literature search reveals that we and others have explored different usages of magnetic Fe 3 O 4 nanoparticles as magnetically recoverable catalysts in organic reaction processes. Additionally, transition metal Schiff‐base complexes have attracted much interest in the field of catalysis because of the extensive variety of applicability, like chemical stability, controlling the performance of metals in a large diversity of valuable catalytic transformations and stabilization of different metals in various oxidation states .…”

Synthesis of water-dispersed magnetic nanoparticles (H2O-DMNPs) of β-cyclodextrin modified Fe3O4 and its catalytic application in Kabachnik–Fields multicomponent reaction

“…Recently we have reported the dispersion and stabilization of γ-Fe 2 O 3 within ethyl acetate which can be applied for the catalytic cases. These materials can robustly be applied in the catalysis of organic reactions and at final step, can be separated from reaction mixture by a magnet [14]. Beyond these advantages, available starting materials and facile synthesis of ferrous oxide NPs have raised a great attention among researchers.…”