Preparation of DSA@MNPs and application as heterogeneous and recyclable nanocatalyst for oxidation of sulfides and oxidative coupling of thiols

Immobilized Cu(II) Schiff base complex supported on Fe3O4 magnetic nanoparticles: A highly efficient and reusable new catalyst for the synthesis of pyranopyridine derivatives

“…The products were fully characterized based on their physical properties and FT-IR, 1 H NMR, 13 C NMR and mass spectral data, and compared with the reported data for known products. After completion of the reaction, as monitored by TLC using ethyl acetate-n-hexane (10:4) as eluent, the resulting mixture was diluted with hot ethanol (5 ml) and the catalyst was separated using an external magnet.…”

“…Fourier transform infrared (FT-IR) spectra were recorded from KBr pellets with a PerkinElmer GX FT-IR spectrometer. 1 H NMR (400 MHz) and 13 C NMR (100 MHz) spectra were recorded with Bruker Avance instruments for samples in DMSO-d 6 and CDCl 3 as solvents at ambient temperature using tetramethylsilane as internal standard. Mass spectra were recorded with an Agilent GC-MS 5975c spectrometer operating at an ionization potential of 70 eV.…”

“…[8][9][10][11] As a result, functionalized MNPs are of special interest for their application in various industrial and research fields and are good candidates for removal of heavy metal ions from wastewater. [13][14][15][16] Schiff bases, named after Hugo Schiff, are versatile compounds synthesized from condensation of amino compounds with carbonyl compounds. [13][14][15][16] Schiff bases, named after Hugo Schiff, are versatile compounds synthesized from condensation of amino compounds with carbonyl compounds.…”

“…1 H NMR (400 MHz) and 13 C NMR (100 MHz) spectra were recorded with Bruker Avance instruments for samples in DMSO-d 6 and CDCl 3 as solvents at ambient temperature using tetramethylsilane as internal standard. Melting points were measured in open capillary tubes using a Buchi 510 apparatus.…”

“…[12] Among the various types of supporting magnetic nanoparticles, biocompatible superparamagnetic iron oxide nanoparticles have evolved as promising magnetic supports for heterogenizing and improving the catalytic efficiency of many different homogeneous catalysts due to their simple preparation, low cost, high surface area and superparamagnetism. [13][14][15][16] Schiff bases, named after Hugo Schiff, are versatile compounds synthesized from condensation of amino compounds with carbonyl compounds. Schiff bases are widely used as intermediates in organic synthesis and for industrial purposes.…”