Flow Electrosynthesis of Sulfoxides, Sulfones, and Sulfoximines without Supporting Electrolytes
作者:Nasser Amri、Thomas Wirth
DOI:10.1021/acs.joc.1c00860
日期:2021.11.19
An efficient electrochemical flow process for the selective oxidation of sulfides to sulfoxides and sulfones and of sulfoxides to N-cyanosulfoximines has been developed. In total, 69 examples of sulfoxides, sulfones, and N-cyanosulfoximines have been synthesized in good to excellent yields and with high current efficiencies. The synthesis was assisted and facilitated through a supporting electrolyte-free
A novel polymer-supported recyclable photocatalyst has been developed for visible light mediated oxidation reactions. The organic dye eosin Y was loaded on macroporous commercially available Amberlite IRA 900 chloride resin and exploited as a photocatalyst for visible light mediated oxidation of thioethers to sulfoxides and phenylboronic acids to phenols under open atmospheric air. Varieties of functional
已经开发了用于可见光介导的氧化反应的新型聚合物负载的可回收光催化剂。将有机染料曙红Y装载在可商购的大孔Amberlite IRA 900氯化物树脂上,并用作光催化剂,用于在敞开的大气中将可见光介导的硫醚氧化为亚砜和将苯基硼酸氧化为苯酚。氧化过程中对各种官能团的耐受性良好。该催化剂可循环使用六个周期,而效率没有明显损失。此外,已证明将克级的硫化物氧化为亚砜可证明该方法的商业可行性。
Kinetics and mechanism of the oxidation of some organic sulfides by morpholinium chlorochromate
作者:Neha Malani、Manju Baghmar、Pradeep K. Sharma
DOI:10.1002/kin.20372
日期:2009.1
play important roles. The correlation analyses of the rate of oxidation of 34 sulfides were performed in terms of various single and multiparametric equations. For the aryl methyl sulfides, the best correlation is obtained with Charton's localized‐delocalized‐resonance and localized‐delocalized‐resonance‐steric equations. The oxidation of alkyl phenyl sulfides exhibited a very good correlation in terms
Oxidation of organic sulfides by tetraethylammonium chlorochromate: a kinetic and mechanistic study
作者:Deepika Sharma、P. Pancharia、K. Vadera、Pradeep K. Sharma
DOI:10.1080/17415993.2011.587519
日期:2011.8
The oxidation of organic sulfides by tetraethylammonium chlorochromate (TEACC) resulted in the formation of the corresponding sulfoxides. The reaction is first order with respect to both TEACC and the sulfide. The reaction is catalyzed by toluene-p-sulfonic acid (TsOH). The oxidation was studied in 19 different organicsolvents. An analysis of the solvent effect by Swain’s equation showed that both
Oxidation of Organic Sulfides by Imidazolium Fluorochromate: A Kinetic and Mechanistic Approach
作者:Lokesh Mathur、A. Choudhary、Om Prakash、Pradeep K. Sharma
DOI:10.14233/ajchem.2014.15753
日期:——
The oxidation of organic sulfides by imidazolium fluorochromate resulted in the formation of the corresponding sulfoxides. The reaction is first order with respect to imidazolium fluorochromate. A Michaelis-Menten type kinetics was observed with respect to the reactants. The reaction is catalyzed by toluene-p-sulfonic acid. The oxidation was studied in nineteen different organic solvents. An analysis of the solvent effect by Swains equation showed that the both cation- and anion-solvating powers of the solvents play important roles. The correlation analyses of the rate of oxidation of thirty four sulfides were performed in terms of various single and multiparametric equations. For the aryl methyl sulfides, the best correlation is obtained with Chartons LDR and LDRS equations. The oxidation of alkyl phenyl sulfides exhibited a good correlation in terms of Pavelich-Taft equation. The polar reaction constants are negative indicating an electron-deficient sulfur centre in the rate-determining step. A mechanism involving formation of a sulphenium cation intermediate in the slow step has been proposed.