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.
A straightforward, efficient, and selectiveoxidation of sulfide to sulfoxide with 30% H2O2 catalyzed by copper(II)–Schiff base complex is described. The reactions proceed under mild conditions in acetonitrile at room temperature to provide a variety of aryl and alkylsulfoxides in excellent yield.
描述了铜(II)-席夫碱络合物催化的30%H 2 O 2直接,高效且选择性地将硫化物氧化为亚砜的方法。反应在温和条件下于室温在乙腈中进行,以优异的收率提供各种芳基和烷基亚砜。
Kinetics and mechanism of oxygenation of aromatic sulfides and arylmercaptoacetic acids by peroxomonophosphoric acid
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.
Oxo-Rhenium(V) Complexes Containing Heterocyclic Ligands as Catalysts for the Reduction of Sulfoxides
作者:Sara C. A. Sousa、Joana R. Bernardo、Mariusz Wolff、Barbara Machura、Ana C. Fernandes
DOI:10.1002/ejoc.201301057
日期:2014.3
work reports the catalytic activity of a large variety of oxo-rhenium(V) complexes (1 mol-%) containing the ligands 2-(2-hydroxy-5-methylphenyl)benzotriazole (Hhmpbta), 2-(2-hydroxyphenyl)benzothiazole (Hhpbt), 2-(2-hydroxyphenyl)benzoxazole (Hhpbo), and 2-(2-hydroxyphenyl)-1H-benzimidazole (Hhpbi) in the deoxygenation of sulfoxides with silanes or boranes as the reducing agents. In general, all of the