876494-48-3Relevant articles and documents
An efficient heterogeneous Cu(I) complex for the catalytic oxidation of alcohols and sulfides: synthesis, characterization, and investigation of the catalyst activity
Oroujzadeh, Nasrin,Baradaran, Zahra,Sedrpoushan, Alireza
, p. 2344 - 2364 (2021/08/06)
A heterogeneous Cu(I) complex was synthesized by reaction of C5H4NC(O)NHP(O)[NHC(CH3)3]2 (L) with CuCl and used as a catalyst for green oxidation of aromatic alcohols and sulfides. According to the characterization results obtained from 31P NMR, UV-Vis, FT-IR, mass, XRD, elemental analysis, and molar conductivity techniques, the chemical formula of the complex (1) was suggested as [CuClL2]. Parameters on the catalytic activity (reaction temperature, the substrate to oxidant molar ratio, catalyst amount, and solvent type) were optimized, using H2O2 as a green oxidant, and excellent conversion amounts (100%) were achieved under optimal conditions. Moreover, the generality and recyclability of the catalyst were tested and confirmed. A comparison between the oxidation results of the alcohol and sulfide in the presence of 1 with other catalysts indicated that in most cases 1 showed better efficiency, in a more reasonable reaction time and conditions.
Pyridiniumporphyrazinato oxo-vanadium tribromomethanide as a new source of Br+ catalyst for the chemo and homoselective oxidation of sulfides and benzylic alcohols
Safaiee, Maliheh,Moeinimehr, Mahtab,Zolfigol, Mohammad Ali
, p. 138 - 150 (2019/06/17)
The present study describes the design and synthesis of novel nano N-bromo porphyrazin (N-bromo tetra-2,3-pyridiniumporphyrazinato oxo-vanadium tribromomethanide [VO(TPPABr)] CBr3) as an efficient, recyclable and thermal stable heterogeneous catalyst for chemo and homoselective oxidation of sulfides to sulfoxides and benzyl alcohols to benzaldehydes. This ecofriendly heterogeneous catalyst was fully characterized by FT-IR spectra, UV–Vis spectra, X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and thermal gravimetric analysis (TGA), energy-dispersive X-ray spectroscopy (EDX) and elemental analysis (CHN). The synthesized catalyst exhibited a high-performance and considerable reusability.
Selective synthesis of sulfoxides and sulfones from sulfides using silica bromide as the heterogeneous promoter and hydrogen peroxide as the terminal oxidant
Maleki, Behrooz,Hemmati, Saba,Sedrpoushan, Alireza,Ashrafi, Samaneh Sedigh,Veisi, Hojat
, p. 40505 - 40510 (2015/02/03)
Silica bromide as a heterogeneous promoter and reagent is prepared from the reaction of silica gel with PBr3as a non-hydroscopic, filterable, cheap, and stable yellowish powder that can be stored for months. The results show that silica bromide is a suitable and efficient promoter for the chemoselective oxidation of sulfides to the corresponding sulfoxides or sulfones in the presence of 30% H2O2in acetonitrile. The excellent yields, heterogeneous conditions, simplicity, compatibility with a variety of functionalities, and ease of isolation of the products make our procedure a practical alternative.
Uronium hydrogen sulfate/urea-hydrogen peroxide as a green and metal-free catalytic system for the efficient, chemo-, and homoselective oxidation of sulfides to sulfoxides
Hasaninejad, Alireza,Chehardoli, Gholamabbas,Zolfigol, Mohammad Ali,Abdoli, Abbas
experimental part, p. 271 - 280 (2011/04/22)
Chemical Equation Presented An efficient, chemoselective, and metal-free oxidation of sulfides is described using urea-hydrogen proxide (UHP) adduct as a stable, inexpensive, and easily handled reagent in the presence of uronium hydrogen sulfate (UHS). Both UHP and UHS release urea as an environmentally benign byproduct. The advantages of the described method are generality, chemoselectivity, short reaction time, low cost, high atom economy, and green chemistry protocols. Copyright Taylor & Francis Group, LLC.
Metal-free catalytic oxidation of sulfides to sulfoxides with ammonium nitrate, ammonium hydrogen sulfate and ammonium bromide as catalyst
Ghorbani-Choghamarani, Arash,Zolfigol, Mohammad Ali,Ayazi-Nasrabadi, Roia
experimental part, p. 33 - 36 (2010/08/19)
A general and metal-free catalytic oxidation of aliphatic and aromatic sulfides to their corresponding sulfoxides via combination of ammonium nitrate (NH4NO3), supported ammonium hydrogen sulfate on silica gel (NH4HSO4-sio2and a catalytic amount of ammonium bromide (NH4Br) in the presence of wet sio2 (50percent, w/w) has been investigated. The reactions were carried out heterogeneously and selectively in short reaction times in CH2Cl2 at room temperature. This protocol is mild and efficient compared to other reported methods.
