Acid/Phosphide-Induced Radical Route to Alkyl and Alkenyl Sulfides and Phosphonothioates from Sodium Arylsulfinates in Water
作者:Ya-mei Lin、Guo-ping Lu、Gui-xiang Wang、Wen-bin Yi
DOI:10.1021/acs.joc.6b02459
日期:2017.1.6
can in situ generate arylsulfenyl radicals. These radicals have high reactivity to react with alkynes, alkenes, and H-phosphine oxides for the synthesis of alkyl and alkenyl sulfides and phosphonothioates. The control experiments and quantum calculations are also performed to gain insights into the generation mechanism of arylsulfenyl radicals. Notably, the chemistry is free of thiol odors, organic solvents
economical phosphorylation of thiols has been achieved via halogen- and metal-free K2CO3-promoted aerobic oxidative cross-coupling of trialkyl phosphites, dimethyl phenylphosphonite, or methyl diphenylphosphinite with thiophenols using air as the oxidant at room temperature. This transformation provides a straightforward route to the construction of phosphorus–sulfur bonds with wide functional group compatibility
通过在室温下使用空气作为氧化剂,通过无卤和无金属的K 2 CO 3促进亚磷酸三烷基酯,二甲基苯基亚膦酸酯或甲基二苯基亚膦酸酯与硫代苯酚的需氧氧化交叉偶联,实现了硫醇的便捷,实用和经济的磷酸化。这种转变为构建具有广泛官能团相容性的磷硫键提供了一条简单的途径,该方法可提供高达94%的收率的硫代磷酸酯。
Electrochemically driven synthesis of phosphorothioates from trialkyl phosphites and aryl thiols
作者:Lingmin Zhao、Xin Liu、Shuxian Shi、Zengzhi Wu、Xiaqun Guo、Zhenlu Shen、Meichao Li
DOI:10.1016/j.electacta.2021.138748
日期:2021.9
elegant protocol for synthesis of phosphorothioates from trialkyl phosphites and aryl thiols via indirect electrochemical oxidation mediated by KI has been successfully developed. KI as a redox mediator, enabled the reaction of trialkyl phosphites and aryl thiols effectively at low potential. Cyclic voltammetry and in situ FTIR were applied to investigate the electrocatalytic activity of KI for the cross-coupling
通过 KI 介导的间接电化学氧化从亚磷酸三烷基酯和芳基硫醇合成硫代磷酸酯的简便而优雅的方案已被成功开发。KI 作为氧化还原介质,可以在低电位下有效地实现亚磷酸三烷基酯和芳基硫醇的反应。应用循环伏安法和原位FTIR 来研究 KI 对亚磷酸三烷基酯与芳基硫醇交叉偶联的电催化活性。在最佳条件下以良好到极好的收率获得了多种硫代磷酸酯。该策略为构建具有良好官能团兼容性和广泛底物范围的 P-S 键提供了便利。
Iodine-Catalyzed Mono- and Disulfenylation of Indoles in PEG<sub>400</sub>
through a Facile Microwave-Assisted Process
作者:Rajjakfur Rahaman、Pranjit Barman
DOI:10.1002/ejoc.201701293
日期:2017.11.16
An iodine-catalyzed versatile green method for the synthesis of mono- and 2,3-bis-sulfenyl indoles has been presented. Various indoles can react with alkyl or aryl sodiumsulfinates using hydrogen peroxide as an oxidizing agent in PEG400 under microwave conditions. This simple method enabled the rapid synthesis of mono- and 2,3-bis-sulfenylindoles with good to excellent yields under metal free conditions