is established, which provides diaryl disulfides or diaryl monoselenides in moderate to good yields with excellent selectivities, respectively. Moreover, after sequential reduction and coupling with aryl/alkyl iodides in one pot, unsymmetrical monosulfides were obtained in good yields.
Selenium dioxide promoted dinitrogen extrusion/direct selenation of arylhydrazines and anilines
作者:Mohammad Yaqoob Bhat、Atul Kumar、Qazi Naveed Ahmed
DOI:10.1016/j.tet.2020.131105
日期:2020.4
A novel, efficient, economical strategy for the coupling and direct selenation of arylhydrazines to selenides using SeO2 has been developed. Our method employs SeO2 as the selenium source with hydrazines as coupling reactants to generate selenides via dinitrogen extrusion. This reagent also helped to generate ArSesubstitued aniline derivatives via C– H functionalization reaction in good yields. The
Copper-catalyzed chalcogenation of aryl iodides via reduction of chalcogen elements by aluminum or magnesium
作者:Nobukazu Taniguchi
DOI:10.1016/j.tet.2012.09.019
日期:2012.12
Aluminum-induced copper-catalyzed coupling of aryl iodides with selenium or sulfur element could afford the corresponding diaryl selenides or sulfides in good yields. When magnesium chloride as an additive was employed, diaryl monoselenides and monosulfides were selectively obtained. On the contrary, the use of sodium carbonate produced diaryl diselenides and disulfides. The preparation of diaryl diselenides
Deoxygenation of sulfoxides, selenoxides, telluroxides, sulfones, selenones and tellurones with Mg–MeOH
作者:Jitender M. Khurana、Vandana Sharma、Silvi A. Chacko
DOI:10.1016/j.tet.2006.11.027
日期:2007.1
The deoxygenation of a variety of sulfoxides, selenoxides, telluroxides, sulfones, selenones and tellurones has been reported with Mg–MeOH at room temperature in nearly quantitative yields. The deoxygenation is proposed to proceed by SET from Mg to the substrate.
Mono- or Dichalcogenation of Aryl Iodide with Sulfur or Selenium by Copper Catalyst and Aluminum
作者:Nobukazu Taniguchi
DOI:10.1055/s-2005-871545
日期:——
copper-catalyzed mono- or dichalcogenation of aryl halide with sulfur or selenium can be carried out with the addition of aluminum. This method takes advantage of two properties of both the insertion of copper into the chalcogen-chalcogen bond and the reductive ability of aluminum. Furthermore, the addition of MgCl 2 or Na 2 CO 3 enables the selective synthesis of diaryl monochalcogenides or disulfides
芳基卤与硫或硒在铜催化下的单或二硫代反应可以在加入铝的情况下进行。这种方法利用了铜插入硫属元素-硫属元素键的两个特性和铝的还原能力。此外,添加 MgCl 2 或 Na 2 CO 3 能够选择性合成二芳基单硫属元素化物或二硫化物。