544-40-1Relevant articles and documents
FLUORENONE KETYL ANIONS GENERATED IN HYDROCARBON MEDIA BY PHASE TRANSFER CATALYSIS
Cazianis, Constantine T.,Screttas, Constantinos G.
, p. 165 - 168 (1983)
Fluorenone ketyl anions with the counterions Bun3S(1+), Bun4N(1+) and (n-C12H25)3(CH3)N(1+) have been generated in benzene by decomposing fluorenopinacol with the relevant alkylammonium or alkylsulphonium base, under phase-transfer catalytic conditions.The recorded ESR spectra in the hydrocarbon medium exhibit a marked cation dependence.The phenomenon is interpreted on the basis of spin density transfer from the anion to the magnetic nuclei of the cation.The implications to the phase transfer catalysis are discussed.
Synthesis, IR/Raman, and quantum-chemical structural analysis of new octathiotetraphosphetane ammonium salts
Badeeva, Elena K.,Platova, Elena V.,Batyeva, Elvira S.,Kursheva, Lidiya I.,Zvereva, Elena E.,Vandyukov, Aleksander E.,Katsyuba, Sergey A.,Kovalenko, Valeryi I.,Sinyashin, Oleg G.
, p. 24 - 30 (2011)
New octathiotetraphosphetane ammonium salts are obtained based on the reaction of white phosphorus (P4) and elemental sulfur with aliphatic mercaptans in the presence of amines (morpholine, methylmorpholine, pyrrolidine, and N,N-dimethylbenzylamine). Both the salts and novel Cu(I) chloride complex with the pyperidinium salt of octathiotetraphosphetane are characterized by IR/Raman spectroscopy in combination with DFT methods. The comparative spectral analysis reveals clear spectral features, characteristic for a P4S 84- anion, which are present in IR and Raman spectra of all the compounds obtained.
Catalytic dehydrogenation of amines to imines and the in-situ reduction of sulfoxides into sulfides
Li, Bo,Liu, Bing,Liu, Xixi,Wang, Wei,Wang, Yanxin,Xiang, Nian,Zhang, Zehui
, p. 81 - 88 (2021/07/30)
The catalytic acceptorless dehydrogenation of primary amines into imines and H2 represents one of the most important organic transformations, and the in-situ utilization of the generated H2 for chemical reduction reactions has never
Thioether preparation method
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Paragraph 0063; 0064, (2017/02/28)
The invention provides a thioether preparation method. The thioether is prepared according to the reaction formula of a formula (1) or a formula (2), wherein the A1-R1-X1 and the A2-R2-X2 are arylhalostannyl derivatives, no transition metal catalysts are needed in the reaction, heavy metal pollution is avoided, the used sulfur sources (sulfide and elementary substance sulfur) are cheap and easy to obtain, operation is simple and efficient, the reaction condition is mild, the cost is low, safety is high, and the thioether preparation method is suitable for industrial production.
Cd(II)-MOF-IM: Post-synthesis functionalization of a Cd(II)-MOF as a triphase transfer catalyst
Wang, Jian-Cheng,Ma, Jian-Ping,Liu, Qi-Kui,Hu, Yu-Hong,Dong, Yu-Bin
supporting information, p. 6989 - 6992 (2016/06/09)
A robust and porous Cd(ii)-MOF based on a bent imidazole-bridged ligand was synthesized and post-synthetically functionalized with linear alkyl chains to afford imidazolium salt (IM)-type triphase transfer catalysts for organic transformations. The imidazolium salt decorated Cd(ii)-MOF-IM exhibits typical solid phase transfer catalytic behavior for the azidation and thiolation of bromoalkane between aqueous/organic phases. Moreover, they can be easily recovered and reused under the PTC conditions. Cd(ii)-MOF-IM herein created a versatile family of solid phase transfer catalysts for promoting a broad scope of reactions carried out in a biphasic mixture of two immiscible solvents.
One-Pot Intermolecular C–S Self-Coupling of Dimethyl Sulfoxide Promoted by Molybdenum Pentachloride
Bortoluzzi, Marco,Ferretti, Eleonora,Hayatifar, Mohammad,Marchetti, Fabio,Pampaloni, Guido,Zacchini, Stefano
, p. 3838 - 3845 (2016/08/19)
The reactions between MoCl5and 1–2 equiv. of a selection of sulfoxides at room temperature in dichloromethane as solvent were studied. The 1:1 molar reaction between MoCl5and dimethyl sulfoxide (DMSO) afforded the C–S coupling product [Me2SCH2SMe][MoOCl4] (1), which was isolated in 46 % yield and characterized by analytical and spectroscopic methods and by X-ray diffraction. MoOCl3, SMe2and HCl were identified as side products. The reactions between MoCl5and tetrahydrothiophene 1-oxide, nBu2SO, MePhSO or (PhCH2)2SO yielded the corresponding sulfides and, in the cases of (PhCH2)2SO and MePhSO, also C–S activation compounds. According to DFT calculations, the unusual formation of 1 is the consequence of thermodynamically feasible Cl/O interchange between MoCl5and DMSO, this being a prerequisite for successive C–H bond activation.
Oxidation and halogenation of divinyl selenide. first synthesis of divinyl selenoxide
Kurkutov,Potapov,Amosova
, p. 624 - 627 (2016/07/06)
Efficient procedure was developed for the preparation of divinyl selenoxide in 92% yield by oxidation of divinyl selenide with sodium periodate. At the action of S-nucleophiles on the divinyl selenoxide it is reduced to divinyl selenide. The reaction of divinyl selenide with an equimolar amount of sulfuryl chloride or bromine led to halogenation products at the selenium atom: divinylselenium dichloride and divinylselenium dibromide. A rearrangement was discovered of divinylselenium dibromide into vinyl(1,2-dibromoethyl)-selenide. The hydrolysis of divinylselenium dichloride results in divinyl selenide.
Reaction mechanisms of thioetherification for mercaptans and olefins over sulfided Mo-Ni/Al2O3 catalysts
Shen, Zhibing,Ke, Ming,Yu, Pei,Hu, Haiqiang,Song, Zhaozheng,Jiang, Qingzhe
, p. 120 - 127 (2015/02/02)
The thioetherification reaction of 1-butanethiol and 1-hexene dissolved in n-hexane was investigatedover sulfided Mo-Ni/Al2O3catalysts. The experimental results showed the catalysts have good cat-alytic performance for thioetherification reaction, but the isomerization and hydrogenation reactions of olefins over the catalysts can inhibit thioetherification reaction. As reaction temperature increases,the isomerization and hydrogenation reactions of olefins increase rapidly, however, the inhibition of thioetherification reaction also increases. The sulfur distribution and molecular structures of sulfurcompounds in the products were analyzed by the gas chromatograph with sulfur chemiluminescencedetector (GC-SCD) and the gas chromatograph/mass spectra spectrometry (GC/MS). Two possible routesof thioetherification reaction could be observed. At low temperature, the major pathway involves a directaddition of 1-butanethiol to the terminal carbon of double bond of 1-hexene. In this mechanism, the mainproduct is anti-Markovnikov adduct. At a higher temperature, the C S bond of 1-butanethiol can be sub-sequently cleaved, and the adsorbed -SH species can be formed on the catalysts. On the same time,abundant 1-hexene can be absorbed on the catalysts, as well. Therefore, the adsorbed SH species canthen recombine with adsorbed 1-hexene to form new hexyl-mercaptans, which can continue to produceanother kind of thioether (di-hexyl sulfide) with adsorbed 1-hexene. Similar with the first reaction route,the thioether of the anti-Markonikov adduct still dominates in the product.
Unexpected reaction of 2-chloro-1-propen-3-yl isothiuronium chloride with potassium ditelluride: the first example of vicinal elimination of chlorine and sulfur-bearing moieties
Levanova, Ekaterina P.,Grabelnykh, Valentina A.,Elaev, Alexander V.,Albanov, Alexander I.,Klyba, Lyudmila V.,Russavskaya, Natalia V.,Tarasova, Olga A.,Rozentsveig, Igor B.,Korchevin, Nikolai A.
, p. 505 - 511,7 (2020/09/16)
2-Chloro-1-propen-3-yl isothiuronium chloride reacts with potassium ditelluride in hydrazine hydrate to afford elemental tellurium and allene. The latter is formed due to the vicinal elimination of chlorine and a sulfur-bearing moiety.
Aliphatic thioethers by s-alkylation of thiols via trialkyl borates
Gunes, Deniz,Sirkecioglu, Okan,Bicak, Niyazi
experimental part, p. 1685 - 1690 (2010/09/17)
A simple and convenient one-pot procedure is described for the synthesis of thioethers via boron esters. This procedure involves in-situ generation of alkyl sulfates by reaction of trialkyl borates with concentrated sulfuric acid and subsequent reaction with thiols in the presence of pyridine. The reactions with boron esters of primary or secondary alcohols proceed cleanly at 100C and afford aliphatic thioethers in reasonable yields (59-93%) within 24 h. Interestingly, the 1H NMR spectra of the products showed no sign of positional isomerisms. The method fails however with thiophenol and does not yield aromatic thioethers, due to electrophilic substitution at the phenyl ring. Copyright Taylor & Francis Group, LLC.
