- Fe3O4?BNPs?SiO2-SO3H as a highly chemoselective heterogeneous magnetic nanocatalyst for the oxidation of sulfides to sulfoxides or sulfones
-
To achieve green chemistry goals and also to reduce the cost of catalysts as well as to avoid producing toxic wastes and show the importance of separation and recycling of catalysts from the reaction medium, in this work, we describe the preparation and characterization of magnetic acidic boehmite nanoparticles as a heterogeneous catalyst, which is called Fe3O4?BNPs?SiO2-SO3H. This catalyst works efficiently in the selective oxidation of sulfides to sulfoxides or sulfones in the presence of H2O2 as a green oxidant. It can easily be separated from the reaction medium by using an external magnet and it was recycled 6 times without loss of magnetic catalytic properties.
- Ghanbari Kermanshahi, Mohammad,Bahrami, Kiumars
-
p. 36103 - 36112
(2019/11/20)
-
- Host (aluminum incorporated mesocellulous silica foam (Al-MCF))-guest (tungsten polyoxometalate) nanocomposite material: An efficient and reusable catalyst for selective oxidation of sulfides to sulfoxides and sulfones
-
A green, efficient and selective approach for the oxidation of sulfides to sulfoxides and sulfones with H2O2 at room temperature is reported. The reaction is performed in the presence of tungstophosphoric acid (PW12) supported on an aluminum incorporated mesocellulous silica foam (Al-MCF) (via both: the impregnation and encapsulation methods), as heterogeneous and reusable catalysts. The structural and textural characterizations of these catalysts were done using FTIR, X-ray diffraction, N2 adsorption-desorption and TEM.
- Fazaeli, Razieh,Aliyan, Hamid,Ahmadi, Mohammad Ali,Hashemian, Saeedeh
-
-
- Oxidation of polyfunctional sulfides with chlorine dioxide
-
3-Benzylsulfanyl-4,5-diphenyl-4H-1,2,4-triazole, 5-methylsulfanyl-1-phenyl- 1H-tetrazole, 2-methylsulfanyl-1H-benzimidazole, 2-benzylsulfanyl-1H- benzimidazole, and 1-butylsulfanyl-4-nitrobenzene were oxidized to the corresponding sulfoxides with chlorine
- Loginova,Rodygin,Rubtsova,Slepukhin,Kuchin,Polukeev
-
experimental part
p. 124 - 130
(2011/04/26)
-
- TMSCl-promoted selective oxidation of sulfides to sulfoxides with hydrogen peroxide
-
Selective oxidation of sulfides to sulfoxides is achieved using H 2O2 and TMSCl as the promotor. Aromatic and aliphatic sulfides are oxidized to sulfoxides in excellent yields and in short reaction times. Different functional groups including ketone, alkene, ester, and alcohol are tolerated.
- Bahrami, Kiumars,Khodaei, Mohammad M.,Yousefi, Behrooz H.,Arabi, Mehdi Sheikh
-
experimental part
p. 6939 - 6941
(2011/03/17)
-
- Oxidation of sulfides to sulfoxides with H2O2/HNO3 reagent system
-
Selective oxidation of sulfides to sulfoxides is achieved by H2O2 using HNO3 as the promotor. Aromatic and aliphatic sulfides are oxidized to sulfoxides in excellent yields and short reaction times. Different functional groups including C-C double bond, ester, ketone, acetal, alcohol, and oxime groups are tolerated under this reaction condition.
- Khodaei, Mohammad Mehdi,Bahrami, Kiumars,Arabi, Mehdi Sheikh
-
experimental part
p. 83 - 88
(2010/10/20)
-
- TAPC-promoted oxidation of sulfides and deoxygenation of sulfoxides
-
Figure presented. 1,3,5-Triazo-2,4,6-triphosphorine-2,2,4,4,6,6- tetrachloride (TAPC) was found to be an efficient promoter for the oxidation of sulfides and deoxygenation of sulfoxides. Excellent yields, short reaction time, easy and quick isolation of the products, solvent-free process, and excellent chemoselectivity are the main advantages of this procedure.
- Bahrami, Kiumars,Khodaei, Mohammad M.,Sheikh Arabi, Mehdi
-
supporting information; experimental part
p. 6208 - 6213
(2010/11/04)
-
- H2O2/Tf2O system: An efficient oxidizing reagent for selective oxidation of sulfanes
-
A versatile procedure for the oxidation of sulfanes to sulfoxides without any overoxidation to sulfones has been reported. It is noteworthy that the reaction tolerates oxidatively sensitive functional groups and that the sulfur atom is selectively oxidize
- Khodaei, Mohammad Mehdi,Bahrami, Kiumars,Karimi, Ahmad
-
p. 1682 - 1684
(2008/12/21)
-
- Tin(II) polyoxometalate as an efficient catalyst for the selective oxidation of sulfides to sulfoxides
-
The applicability of the tin(II) polyoxometalate catalyst, [(n-C 4H9)4N]5PSnMo2W 9O39 · 9H2O, for sulfoxidation of diaryl, dibenzyl, aryl benzyl, dialkyl, cyclic, and
- Rafiee, Ezzat,Baltork, Iraj M.,Tangestaninejad, Shahram,Azad, Alireza,Moinee, Sepideh
-
p. 601 - 606
(2008/01/27)
-