31110-65-3

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• 4110-50-3 ethyl propyl sulfide 
• 64-17-5 ethanol 

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• 74-85-1 ethene 
• 55109-28-9 propane-1-sulfinic acid 

Relevant academic research and scientific papers

Air atmospheric photocatalytic oxidation by ultrathin C,N-TiO2nanosheets

Herein, we demonstrate the highly efficient photocatalytic sulfide oxidation reaction under mild conditions,i.e.in air, at room temperature and in the absence of a sacrificial reagent, co-catalyst or redox mediator, by using ultrathin C,N-TiO2nanosheets as a photocatalyst.

Method for preparing sulfone by catalyzing sulfur oxide ether

The invention belongs to the technical field of sulfone compound synthesis, and particularly relates to a method for preparing sulfone by catalyzing sulfur oxide ether. The method for preparing the sulfone by catalyzing the sulfur oxide ether specifically includes the steps that a catalyst, sulfur ether and a H2O2 solution with a mass fraction of 30% are mixed in a reaction bottle, and stirred for3-6 h at the room temperature to obtain the sulfone; the molar ratio of the catalyst to the sulfur ether to the H2O2 is 1:10000:50000; and the catalyst is prepared by the steps that a NaVO3 solutionis added to a hydrochloric acid solution of K8[SiW10O36].12H2O and stirred for 5 min to obtain a bright yellow filtrate before filtering, a chloroform solution of a compound A is added to the bright yellow filtrate drop by drop, continuously stirred for 5 h to collect solid, and the solid is the catalyst. According to the method for preparing the sulfone by catalyzing the sulfur oxide ether, the used catalyst has a high conversion number, an organic solvent does not need to be used in the reaction process, and the sulfone can be prepared at the room temperature.

Hydrophilic phase transfer catalyst based on the sulfoacid group and polyoxometalate for the selective oxidation of sulfides in water with hydrogen peroxide

A hybrid catalyst, based on SO3H-fuctionalized quaternary ammonium and polyoxovanadometalate, was synthesized and used for the selective oxidation of sulfides in water at room temperature. The highest turnover numbers (TON) can reach up to 1536. The organic products with high yields can be easily separated and the catalytic system can be used several times with the retention of catalytic activity.

A reusable catalytic system for sulfide oxidation and epoxidation of allylic alcohols in water catalyzed by poly(dimethyl diallyl) ammonium/polyoxometalate

An effective catalyst based on a polyoxometalate and a polymer has been developed for the oxidation of sulfides and allylic alcohols under mild conditions in water. The synthetic procedure to form the catalyst and the separation of the products are convenient, and the system is reusable.

Sulfocompound selective catalytic oxidation reaction system in aqueous phase

The invention provides a sulfocompound selective catalytic oxidation reaction system in an aqueous phase. A catalyst, a sulfocompound and 30% hydrogen peroxide are stirred for 1.5-2 hours under room temperature in the aqueous phase according to the molar ratio of the catalyst to the sulfocompound to the 30% hydrogen peroxide being 1 to 400 to 1200, wherein the conversion rate is greater than 97%, and the selectivity of the product namely sulphone is greater than 94%; the catalyst, the sulfocompound and the 30% hydrogen peroxide are stirred for 6 hours under the room temperature in the aqueous phase according to the molar ratio of the catalyst to the sulfocompound to the 30% hydrogen peroxide being 1 to 1666 to 1666, wherein the conversion rate is greater than 90%, and the selectivity of the product namely sulphoxide is greater than 80%. According to the reaction system disclosed by the invention, after the reaction is completed, extraction is performed with ethyl acetate, after an organic phase is separated, the catalyst dispersed in the aqueous phase can be directly used for the next catalytic reaction, and the catalytic activity, the conversion rate and the selectivity are all kept. The sulfocompound selective catalytic oxidation reaction system disclosed by the invention has the advantages that water is used as a solvent, the reaction condition is mild, the catalytic activity is high, the selectivity of products is good, the consumption of the catalyst is low, and the catalyst can be repeatedly used.

Sulfoxidation with hydrogen peroxide catalyzed by [SeO 4{WO(O2)2}2]2-

The selenium-containing dinuclear peroxotungstate, [(n-C4H 9)4N]2[SeO4{WO(O2) 2}2] (I), acts as a homogeneous catalyst for the selective oxidation of various kinds of cyclic mono- and disulfides with 30% aqueous H2O2. The cyclic disulfides were selectively oxidized to the corresponding monosulfoxides with one equivalent of H2O 2 with respect to the sulfides. In the presence of two equivalents of H2O2, the oxidation of dibenzothiophene gave the corresponding sulfone in 98% yield under the mild conditions. The negative Hammett ρ value (-0.62) for the competitive oxidation of p-substituted thioanisoles and the low XSO (XSO = (nucleophilic oxidation)/(total oxidation)) value of 0.14 for the I-catalyzed oxidation of thianthrene 5-oxide (SSO) revealed that I is a strong electrophilic oxidant. The reactivities of the di- and tetranuclear peroxotungstates with XO 4n- ligands (X = Se(vi), As(v), P(v), S(vi), and Si(iv)) were strongly dependent on the kinds of hetero atoms. The reaction rates for the sulfoxidation decreased with an increase in the XSO values and a peroxotungstate with a stronger electrophilicity was more active for the sulfoxidation. The kinetic and mechanistic investigations showed that the electrophilic attack of the peroxo oxygen at the sulfur atom is a key step in the sulfoxidation. The computational investigation supported the high chemoselectivitiy for the sulfoxidation of diallyl sulfide.

Highly efficient oxidation of sulfides with hydrogen peroxide catalyzed by [SeO4{WO(O2)2}2]2-

By using the selenium-containing dinuclear peroxotungstate at 0.005-0.1 mol%, various kinds of sulfides could be converted into the corresponding sulfoxides or sulfones in excellent yields with one or two equivalents of H 2O2 with respect to the sulfide, respectively.

[γ-1,2-H2SiV2W10O40] immobilized on surface-modified SiO2 as a heterogeneous catalyst for liquid-phase oxidation with H2O2

An organic-inorganic hybrid support has been synthesized by covalently anchoring an N-octyldihydroimidazolium cation fragment onto SiO2 (denoted as 1-SiO2). This modified support was characterized by solid-state 13C, 29Si, and 31P NMR spectroscopy, IR spectroscopy, and elemental analysis. The results showed that the structure of the dihydroimidazolium skeleton is preserved on the surface of SiO2. The modified support can act as a good anion exchanger, which allows the catalytically active polyoxometalate anion [γ-1,2-H 2SiV2W10O40]4- (I) to be immobilized onto the support by a stoichiometric anion exchange (denoted as I/1-SiO2). The structure of anion I is preserved after the anion exchange, as confirmed by IR and 51V NMR spectroscopy. The catalytic performance for the oxidation of olefins and sulfides, with hydrogen peroxide (only one equivalent with respect to substrate) as the sole oxidant, was investigated with I/1-SiO2. This supported catalyst shows a high stereospecificity, diastereoselectivity, regioselectivity, and a high efficiency of hydrogen peroxide utilization for the oxidation of various olefins and sulfides without any loss of the intrinsic catalytic nature of the corresponding homogeneous analogue of I (i.e., the tetra-n-butylammonium salt of I, TBA-I), although the rates decreased to about half that with TBA-I. The oxidation can be stopped immediately by removal of the solid catalyst, and vanadium and tungsten species' can hardly be found in the filtrate after removal of the catalyst. These results rule out any contribution to the observed catalysis from vanadium and tungsten species that leach into the reaction solution, which means that the observed catalysis is truly heterogeneous in nature. In addition, the catalyst is reusable for both epoxidation and sulfoxidation without any loss of catalytic performance.

Selective oxidation of sulfides to sulfoxides and sulfones at room temperature using H2O2 and a Mo(VI) salt as catalyst

Selective oxidation of sulfides to sulfoxides and sulfones is achieved by H2O2 using MoO2Cl2 as the catalyst. Various substituted sulfides having functional groups such as methyl, methoxy, bromo, nitro, alkene, alkyne, alcohol, ester, aldehyde and remarkably an oxime are successfully and selectively oxidized without affecting the sensitive functionalities.