599-70-2Relevant articles and documents
Hydroformylation of Vinyl Sulfones and Sulfoxides Catalyzed by a Zwitterionic Rhodium Complex. A Diastereoselective Process
Totland, Karen,Alper, Howard
, p. 3326 - 3329 (1993)
The hydroformylation of unsaturated sulfones and sulfoxides catalyzed by η6-C6H5B-Ph3Rh+ (1,5-COD) (1) was achieved in excellent yield and regiocontrol, with exclusive formation of branched-chain aldehydes.In the case of phenyl vinyl sulfoxide, evidence is presented for stereoselectivity in the reaction.
Surface decorated magnetic nanoparticles with Mn-porphyrin as an effective catalyst for oxidation of sulfides
Shokoohi, Saeedeh,Rayati, Saeed
, p. 8 - 18 (2021/07/19)
Mn-porphyrin complex was anchored coordinatively to silica-coated surface of magnetic nanoparticles (SMNP). Afterward, a heterogeneous nanocatalyst (Fe3O4@SiO2-MnTCPP) has been characterized by Fourier transform infrared (FT-IR), ultraviolet-visible (UV-vis) spectroscopy, powder X-ray diffraction (XRD), scanning electron microscopy (SEM), vibrating sample magnetometry (VSM), thermogravimetric analysis (TGA), and transmission electron microscope (TEM). A thermal stability up to around 350°C was verified for prepared nanocatalyst based on thermogravimetric analysis. Finally, the catalytic performance of magnetically recoverable Mn-catalyst was exploited in the green oxidation of different sulfides with urea hydrogen peroxide (UHP) in the presence of imidazole as co-catalyst in ethanol under heterogeneous conditions. The eco-friendly property of ethanol strongly induced us to employ it as the reaction solvent in this oxidation system. Complete conversion (≥99) of sulfides to the corresponding sulfoxide or sulfones was obtained for ethyl phenyl sulfide, phenyl vinyl sulfide, diallyl sulfide, thiocyanatoethane, 2-ethyl mercaptoethanol and tetrahydrothiophene. Moreover, the recovered catalysts keep constant conversion yield up to at least three cycles.
On the important transition of sugar-based surfactant as a microreactor for C-S coupling in water: From micelle to vesicle
Ge, Xin,Lei, Qiuyun,Liao, Xiong,Liu, Xuemin,Song, Weili,Wu, Lei,Wu, Siyuan,Zhou, Shaodong
, (2021/09/15)
A reversible, temperature-induced micelle-to-vesicle transition of a sugar-based pseudogemini surfactant (C11D12) was employed for copper-catalyzed C-S coupling in water. The phase behavior and morphology of the C11D12 aqueous solution were investigated by DLS and cryo-TEM. The aggregates undergo a series of transitions upon increasing the temperature: spherical micelles were initially transformed into large vesicles, but they eventually transformed into smaller vesicles. The vesicular catalytic protocol accommodates an excellent substrate scope with moderate to high yields. The mechanisms of temperature-induced aggregate transition and vesicular catalysis were elucidated by experimental results and DFT calculations. It was revealed that the charge layer of the vesicle grants stronger nucleophilicity to the PhSO2-Cu-D12Ga intermediate. Furthermore, the aqueous reaction medium can be recycled and reused several times after easily separating the precipitated product.
Method for synthesizing aryl alkyl sulfone compound by promoting oxidation of aryl alkyl thioether compound through visible light
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Paragraph 0049-0052; 0057-0060; 0076-0079, (2021/02/13)
The invention discloses a method for synthesizing an aryl alkyl sulfone compound by promoting oxidation of an aryl alkyl thioether compound through visible light. The method comprises the following steps of: performing one-pot reaction on an aryl alkyl thioether compound and sodium trifluoromethanesulfinate in a diethylene glycol dibutyl ether solution system under the conditions of oxygen-containing atmosphere and 385-390 nm purple light irradiation to generate the aryl alkyl sulfone compound. The method has the advantages of mild conditions, simple operation, environmental protection, easilyavailable raw materials, excellent compatibility of substrate functional groups, high reaction yield and the like.