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
Fe<sub>3</sub>
O<sub>4</sub>
@S-ABENZ@VO: Magnetically separable nanocatalyst for the efficient, selective and mild oxidation of sulfides and oxidative coupling of thiols
Oxovanadium(IV) immobilized on Fe3O4@S‐ABEN is reported as a highly efficient nanocatalyst for the oxidation of sulfides and oxidative coupling of thiols (using H2O2 as green oxidant), the products of which are obtained in high to excellent yields. The products can be separated by a simple extraction with organic solvent and the catalyst is highly efficient, especially in terms of selectivity of desired product
据报道,固定在Fe 3 O 4 @ S-ABEN上的氧钒(IV)是一种高效的纳米催化剂,可用于硫化物的氧化和硫醇的氧化偶联(使用H 2 O 2作为绿色氧化剂),其产物可在高浓度下获得。高产。可以通过用有机溶剂的简单萃取来分离产物,并且该催化剂是高效的,特别是在所需产物的选择性方面。催化体系可以循环使用,而不会明显降低催化活性。
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
Synthesis and characterization of VO–vanillin complex immobilized on MCM‐41 and its facile catalytic application in the sulfoxidation reaction, and synthesis of 2,3‐dihydroquinazolin‐4(1
<i>H</i>
)‐ones and disulfides in green media
作者:Mohsen Nikoorazm、Maryam Khanmoradi
DOI:10.1002/jccs.201900531
日期:2020.8
as a green oxidant) and also a suitable catalyst for the preparation of 2,3‐dihydroquinazolin‐4(1H )‐one derivatives in water at 90°C. Using this protocol, we show that a variety of disulfides, sulfoxides, and 2,3‐dihydroquinazolin‐4(1H )‐one derivatives can be synthesized in green conditions. The catalyst can be recovered and recycled for further reactions without appreciable loss of catalytic performance
Nickel Schiff-base complexes immobilized on boehmite nanoparticles and their application in the oxidation of sulfides and oxidative coupling of thiols as novel and reusable nano organometal catalysts
Ni-complex-boehmite was prepared in water at room temperature using commercially available materials and applied as an efficient nanocatalyst in the oxidation of sulfides and thiols.