Mild and efficient desulfurization of alkyl sulfides with sodium
摘要:
The reactions of dialkyl mono-and disulfides and functionalized alkylthio compounds with sodium in refluxing hydrocarbon solvent (tetradecane, mesitylene or toluene) resulted in sulfur-free products in very high yields. (C) 1998 Elsevier Science Ltd. All rights reserved.
Trimethylphenylammonium Tribromide as a New and Efficient Oxidizing Agent for the Oxidative Coupling of Thiols into Disulfides and Chemoselective Oxidation of Sulfides into Sulfoxides
Abstract Trimethylphenylammonium tribromide has been introduced as a versatile and new oxidizing agent for the preparation of disulfides and sulfoxides from thiols and sulfides, respectively. The reaction progress is simple, and proceeds under mild and homogenous conditions in ambient temperature. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus
Synthesis and characterization of tribenzyl ammonium-tribromide supported on magnetic Fe3O4 nanoparticles: a robust magnetically recoverable catalyst for the oxidative coupling of thiols and oxidation of sulfides
and its catalytic activity in the oxidative coupling of thiols and oxidation of sulfides was investigated. It is the first report on the use of the immobilized bromine source on Fe3O4 nanoparticles as a nanomagnetic recyclable catalyst for the oxidative coupling of thiols. The nanosolid catalyst could be easily recovered by a simple magnetic separation and reused for several cycles without significant
摘要 考虑到绿色化学原理,磁性纳米粒子,特别是Fe 3 O 4纳米粒子,为现代有机合成开辟了新篇章,以建立一种引人入胜,惊人而有效的催化策略,以促进各种化学反应中催化剂的回收。受此主题的启发,成功地合成了固定在磁性纳米颗粒(Fe 3 O 4 -TBA-Br 3)上作为溴源的三苄基三溴化铵,并研究了其在硫醇氧化偶联和硫化物氧化中的催化活性。这是关于在Fe 3 O 4上使用固定溴源的第一份报告。纳米颗粒作为用于硫醇氧化偶联的纳米磁性可回收催化剂。可以通过简单的磁分离容易地回收纳米固体催化剂,并将其重复使用数个循环而不会显着降低催化活性。 图形概要
Synthesis and characterization of oxo-vanadium complex anchored onto SBA-15 as a green, novel and reusable nanocatalyst for the oxidation of sulfides and oxidative coupling of thiols
Abstract The present work describes the synthesis of a new oxo-vanadium complex immobilized on SBA-15 nanostructure as an efficient catalyst for oxidation of sulfides and oxidative coupling of thiols. Characterization of the resultant AMPD@SBA-15 nanostructure was performed by various physico-chemical techniques such as Fourier transform infrared spectroscopy, transmission and scanning electron microscopies
Oxo-vanadium(IV) Schiff base complex supported on modified MCM-41: a reusable and efficient catalyst for the oxidation of sulfides and oxidative S-S coupling of thiols
Oxo‐vanadium(IV) Schiffbase complex supported on MCM‐41 as an organic–inorganic hybrid heterogeneous catalyst was synthesized with post‐grafting of MCM‐41 with 3‐aminoropropyltrimethoxysilane and subsequent reaction with 3,4‐dihydroxybenzaldehyde and then complexation with oxo‐vanadium acetylacetonate salt. The catalyst was analysed using a series of characterization techniques such as Fourier transform
project boehmite silicasulfuricacid (Boehmite-SSA) has been applied as new acidic porous catalyst for the selectiveoxidation of sulfides to sulfoxides and oxidative coupling of thiols to corresponding disulfides using hydrogen peroxide as oxidizing agent. The products have been obtained in short reaction times and high yields. Boehmite nanoparticles was prepared, coated by silica and then reacted
在这项研究中,项目勃姆石二氧化硅硫酸(Boehmite-SSA)已被用作新型酸性多孔催化剂,用于使用过氧化氢作为氧化剂将硫化物选择性氧化为亚砜,并将硫醇氧化偶联为相应的二硫化物。在短的反应时间和高产率下获得了产物。制备勃姆石纳米颗粒,用二氧化硅涂覆,然后与氯硫酸反应以获得勃姆石-SSA。该催化剂通过FT-IR,TGA / DTA,XRD,TEM,SEM,EDS和BET技术表征。被鉴定为典型的IV型等温线(IUPAC定义)的勃姆石纳米颗粒的BET曲线是介孔材料的特征。氮吸附/解吸测量表明勃姆石纳米颗粒的BET表面积约为122.8 m 2/G。催化剂易于分离,可重复使用几次,而不会明显降低其催化效率。