Immobilization of a vanadium complex onto functionalized nanoporous MCM‐41 and its application as a catalyst for the solvent‐free chemoselective oxidation of sulfide to sulfoxide

Boehmite nanoparticles are aluminium oxide hydroxide (γ-AlOOH) particles, which were prepared using a simple and inexpensive procedure in water at room temperature and further modified using arginine. Subsequently palladium particles were immobilized on their surface to prepare Pd-Arg@boehmite. This novel nanostructured compound was fully characterized using thermogravimetric analysis, X-ray diffraction, inductively coupled plasma optical emission (ICP-OES) and energy-dispersive X-ray spectroscopies, and scanning and transmission electron microscopies. Finally, this catalyst was applied as a moisture-and air-stable heterogeneous material for the synthesis of 5-substituted 1H-tetrazole derivatives. The leaching of palladium and heterogeneity of the catalyst were studied using hot filtration and ICP-OES. This catalyst demonstrated remarkable recyclability. The novelty of this work is that it represents the first time an amino acid has been grafted on boehmite nanoparticles.

Section: Resultsmentioning

confidence: 98%

First report of the direct supporting of palladium–arginine complex on boehmite nanoparticles and application in the synthesis of 5‐substituted tetrazoles

Tahmasbi

Ghorbani‐Choghamarani

2016

“…[25,26] The oxidation of sulfides is the most common and most efficient strategy for the preparation of sulfoxides. [27][28][29] Sulfoxide derivatives have some of biologically active such as antiulcer, antifungal, antibacterial, anti-hypertensive and anti-atherosclerotic. [22,30] Furthermore, allicin, modainil, sulindac, garlicnin L-1, garlicnin B-2, omeprazole and the pesticide Fipronil are various typical examples of the extensive application of sulfoxides in pharmaceutical and fine chemical industries.…”

Section: Introductionmentioning

confidence: 99%

Cu–citric acid metal–organic framework: Synthesis, characterization and catalytic application in Suzuki–Miyaura cross‐coupling reaction and oxidation of sulfides

Koolivand

Nikoorazm

Ghorbani‐Choghamarani

et al. 2021

Citric acid with three carboxylic groups was used as an outstanding chelating agent was utilized for the preparation of Cu–citric acid metal–organic framework (Cu–CA–MOF). The prepared MOF was characterized by FT‐IR, XRD, EDS, AAS, SEM, WDX and BET analysis. N2 adsorption–desorption isotherms indicated acceptable BET surface area for Cu–CA–MOF. SEM images were shown that Cu–CA–MOF has geometric polyhedral shapes. Also, catalytic activity of Cu–CA–MOF successfully examined for the Suzuki–Miyaura cross‐coupling reaction and chemoselective oxidation of sulfides to sulfoxides.

“…[15][16][17] Therefore, a large number of methods, procedures and oxidizing agents have been proposed for this type of transformation. [30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45] Despite the fact that amines such as aniline, pyridine and … are not an appropriate catalyst for the oxidation reactions, they can effectively modify the catalytic activity of the molybdates and molybdenum oxides due to the electronic interactions between these amines and the active sites in the hybrid structures. However, majority of these traditional protocols rely on the use of hazardous terminal oxidants with low content of effective oxygen, and high cost which can generate hazardous by-products.…”

Section: Introductionmentioning

confidence: 99%

Scaled‐up, selective and green synthesis of sulfoxides under mild conditions using (Ce^III‐Mo^VI)O_x/aniline hybrid rods as an efficient catalyst

Feghhi

Malakooti

2019

A novel hybrid material, (Ce III -Mo VI )O x /aniline, with rod-like morphology is synthesized through a wet chemical method using Mo 3 O 10 (C 6 H 5 NH 3 ) 2 .2H 2 O nanowires as precursor. The synthesized materials are characterized by XRD, XPS, SEM, TEM, FTIR, Raman, UV-Vis, TGA, and elemental analysis. Also, their catalytic activities as a hybrid catalyst are tested in the selective oxidation of sulfides using hydrogen peroxide as a green oxidant. The proposed novel hybrid catalyst shows an excellent performance under green conditions at mild temperature. Furthermore, the scalability of the oxidation reaction is shown by making multi-gram quantities at optimized conditions.