Rhodium-Catalyzed Reductive Coupling of Disulfides and Diselenides with Alkyl Halides, Using Hydrogen as a Reducing Agent
作者:Kaori Ajiki、Masao Hirano、Ken Tanaka
DOI:10.1021/ol051588n
日期:2005.9.1
[reaction: see text] We have established that RhCl(PPh3)3 catalyzes a reductive coupling of disulfides and diselenides with alkyl halides in the presence of triethylamine using hydrogen as a reducing agent. This reaction serves as a convenient new method to produce unsymmetrical sulfides and selenides from disulfides and diselenides instead of unstable and odoriferous thiols and selenols.
nanoparticles efficiently catalyzed the C–S cross coupling of aryl and alkyl thiols with aryl halides in the absence of ligands on water under mild conditions. A wide range of diaryl sulfides and aryl alkyl sulfides are synthesized in good to excellent yields utilizing this protocol. This procedure is particularly noteworthy given its mild conditions, avoiding the undesired formation of disulfides through
Reductive Coupling of Disulfides and Diselenides with Alkyl Halides Catalysed by a Silica-Supported Phosphine Rhodium Complex using Hydrogen as a Reducing Agent
作者:Hean Zhang、Mangen Hu、Mingzhong Cai
DOI:10.3184/174751913x13796950361813
日期:2013.10
The reductive coupling of disulfides and diselenides with alkyl halides was achieved in THF at 65 °C in the presence of 3 mol% of a silica-supported phosphine rhodium complex and triethylamine using hydrogen as a reducing agent, affording a variety of unsymmetrical sulfides and selenides in high yields. The heterogeneous rhodium catalyst can be recovered by a simple filtration and reused several times
在 3 mol% 二氧化硅负载的膦铑配合物和三乙胺存在下,使用氢气作为还原剂,在 65 °C 的 THF 中实现二硫化物和二硒化物与烷基卤化物的还原偶联,得到各种不对称的硫化物和硒化物高产。多相铑催化剂可以通过简单的过滤回收并重复使用多次而不会显着损失活性。还观察到与酰卤的反应。
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.
Reductive Cleavage of the S–Si Bond in Arylsulfanyltrimethylsilanes: a Novel Method for the Synthesis of Unsymmetrical Sulfides†
作者:Songlin Zhang、Yongmin M. Zhang
DOI:10.1039/a705190e
日期:——
Arylsulfanyltrimethylsilanes are reduced by samarium diiodide to yield samarium arylthiolates which react with alkyl halides to give unsymmetrical sulfides.