Aromatic and aliphatic sulfides are readily oxidized to sulfoxides or sulfones in high yield with 35% hydrogen peroxide in the presence of cyanuric chloride (CC) as an efficient activator. The oxidation of sulfides proceeds at room temperature and the corresponding sulfoxides or sulfones was selectively obtained by controlling the amounts of H2O2 and CC. Various sulfides possessing functional groups
在三聚氯氰 (CC) 作为有效活化剂的情况下,芳香族和脂肪族硫化物很容易以高产率被氧化成亚砜或砜,其中含有 35% 的过氧化氢。硫化物的氧化在室温下进行,通过控制 H2O2 和 CC 的量选择性地获得相应的亚砜或砜。具有羟基、甲氧基、腈、醛和烯烃双键等官能团的各种硫化物被成功地选择性氧化而不影响敏感的官能团。
Magnetic core-shell nanoparticle-supported Sc (III): A novel and robust Lewis acid nanocatalyst for the selective oxidation of sulfides to sulfoxides by H2O2 under solvent-free conditions
作者:Donya Khaledian、Amin Rostami、Shamileh Rouhani
DOI:10.1016/j.catcom.2019.02.021
日期:2019.5
modified Fe3O4 magneticnanoparticles [MNPs-PhSO3-Sc(OTf)2] and characterized using scanning electron microscopy (SEM), inductively coupled plasma analysis (ICP), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT-IR), energy dispersive X-ray spectroscopy (EDX) and vibrating sample magnetometer (VSM) techniques. The MNPs-PhSO3-Sc(OTf)2 was applied as a magnetically recyclable
首次将三氟甲磺酸scan载于改性的Fe 3 O 4磁性纳米颗粒[MNPs-PhSO 3 -Sc(OTf)2 ]上,并使用扫描电子显微镜(SEM),电感耦合等离子体分析(ICP),热重分析(TGA)进行表征),傅立叶变换红外光谱(FT-IR),能量色散X射线光谱(EDX)和振动样品磁力计(VSM)技术。MNPs-PhSO 3 -Sc(OTf)2用作可循环利用的非均质路易斯酸纳米催化剂,使用过氧化氢作为绿色氧化剂,可将多种硫化物选择性氧化为亚砜,在室温下无溶剂条件下可产生90-98%的收率。也可以将其回收并重复使用至少15个反应周期,而不会损失活性。
Remarkably Mild and Simple Preparation of Sulfenate Anions from β-Sulfinylesters: A New Route to Enantioenriched Sulfoxides
A general, efficient, and experimentally simple method for the generation of sulfenate salts has been developed using β-sulfinylesters as substrates. The process is based on a retro-Michael reaction, initiated by deprotonation at low temperature. Upon treatment with alkyl halides, the liberated sulfenates are subsequently converted into sulfoxides in good to excellent yield. Extension of the methodology
selective oxidation of sulfides to sulfoxides under mild and environmentally safe conditions is achieved using hydrogen peroxide in the presence of Amberlyst 15 and Amberlite IR-400 at room temperature. This procedure can be applied for dialkyl and diaryl sulfides with a variety of functional groups. Functional groups such as hydroxyl, methoxy, amino, aldehyde, and olefinic double bonds remain intact
2,6-Dicarboxypyridinium chlorochromate (2,6-DCPCC) was found to be an efficient reagent for the conversion of thiols to disulfides and sulfides to sulfoxides under neutral and anhydrous conditions in good to excellent yields. Selective oxidation of thiols in the presence of sulfides at room temperature is also observed with this reagent.