Various arenesulfinamides were synthesized in good yields by one-pot reactions of 4-nitrophenyl substituted phenyl sulfoxides with elemental sulfur in liquid ammonia. The arenesulfinamides were further reduced with elemental sulfur in liquid ammonia to give corresponding disulfides.
oxygenation of aryl methyl sulfides and diaryl sulfides by peroxomonophosphoricacid in acetonitrile–water mixture follows an overall second-order kinetics, first-order in each reactant. The study of the influence of [H+] on the oxidation of phenyl methyl and diphenyl sulfides reveals that H2PO5− and HPO52− are the oxidising species in the oxidation process. In substituted phenyl methyl sulfides and diphenyl
过氧一磷酸在乙腈-水混合物中对芳基甲基硫醚和二芳基硫醚的氧化遵循总体二级动力学,即每个反应物的一级动力学。[H的影响的研究+ ]上苯基甲基和二苯基硫化物的氧化揭示ħ 2 PO 5 -和HPO 5 2-是在氧化过程中的氧化物质。在取代的苯基甲基硫醚和二苯基硫醚中,给电子取代基加速了氧合速度,而吸电子基团则阻碍了氧合速度,表明硫化物硫对过氧化物氧的亲核取代。负ρ在速率常数与σ常数的相关性分析中获得的C值也表明在限速步骤中形成了带更多正电荷的硫。与不同的烷基的苯基硫化物研究(C 6 H ^ 5 SR; R =甲基,乙基,镨我或卜吨)指示该速率由笨重的R基团延迟。在苯基巯基乙酸钠的过氧单磷酸氧化中也获得了相似的动力学结果。在动力学研究的基础上,提出了一种常见的机理。
Highly efficient rhenium-catalyzed deoxygenation of sulfoxides without adding any reducing agent
作者:Sara C.A. Sousa、Joana R. Bernardo、Carlos C. Romão、Ana C. Fernandes
DOI:10.1016/j.tet.2012.07.071
日期:2012.9
This work reports a novel method for the deoxygenation of aromatic and aliphatic sulfoxides catalyzed by oxo-rhenium complexes without adding any reducing agent. The oxo-rhenium complex ReOCl3(PPh3)2 proved to be very efficient for the deoxygenation of several sulfoxides with tolerance of different functional groups.
Tetrabutylammonium tribromide impregnated MCM-48 as a heterogeneous catalyst for selective oxidation of sulfides
作者:Prasanta Gogoi、Sukanya Hazarika、Pranjit Barman
DOI:10.1039/c5ra04573h
日期:——
We report here tetrabutylammoniumtribromide supported on MCM-48 as a highly efficient heterogeneous catalyst for the selective oxidation of sulfides, in ethanolic medium using hydrogen peroxide as an oxidant. The aforementioned oxidation reactions were found to proceed rapidly (20 min) and in good yield (85–99%) (17 examples). The oxidation products were characterized by 1H NMR, 13C NMR and elemental
我们在此报告了在MCM-48上负载的三丁基四溴化铵作为一种高效多相催化剂,用于在使用过氧化氢作为氧化剂的乙醇介质中选择性氧化硫化物。发现上述氧化反应进行迅速(20分钟),收率良好(85-99%)(17个实例)。氧化产物通过1 H NMR,13 C NMR和元素分析进行表征。通过TEM,XRD和BET表面积测量来分析催化性能。没有观察到底物的过氧化(通过GC分析),并且该催化剂有效地再循环了五个连续的循环,而其催化活性没有任何显着的损失。
Selective aerobic oxidation of sulfides to sulfoxides catalyzed by coenzyme NAD+ models
Coenzyme NAD+ models can be applied in the photooxygenation of sulfides to sulfoxides as organocatalysts at room temperature. A series of sulfoxides are synthesized easily with this protocol and the possible mechanism is discussed. This procedure provides a reliable approach to the clean production of useful sulfoxides in synthetic chemistry.