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.
Oxidation of alkyl phenyl selenides with m-chloroperbenzoic acid in methanol at room temperature affords the corresponding alkyl methyl ethers almost quantitatively, the reaction being accompanied by phenyl migration and ring-contraction respectively when applied to selenides having a phenyl group vicinal to the phenylselenium moiety and to some methoxyselenation products of cyclic olefins.
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。
Indium(I) Iodide-Mediated Cleavage of Diphenyl Diselenide. An Efficient One-Pot Procedure for the Synthesis of Unsymmetrical Diorganyl Selenides
作者:Brindaban C. Ranu、Tanmay Mandal、Sampak Samanta
DOI:10.1021/ol034178c
日期:2003.5.1
A simple and efficient procedure has been developed for the synthesis of unsymmetrical diorganyl selenides through a one-pot indium(I) iodide-mediated reaction of alkyl halide and diphenyl diselenide in methylene chloride at room temperature. [reaction: see text]
Indium(I) Iodide-Promoted Cleavage of Diaryl Diselenides and Disulfides and Subsequent Condensation with Alkyl or Acyl Halides. One-Pot Efficient Synthesis of Diorganyl Selenides, Sulfides, Selenoesters, and Thioesters
作者:Brindaban C. Ranu、Tanmay Mandal
DOI:10.1021/jo0493727
日期:2004.8.1
disulfides undergo facile cleavages by indium(I) iodide and the corresponding generated selenate and thiolate anions condense in situ with alkyl or acyl halides present in the reaction mixture. Thus, a simple, efficient, and general procedure has been developed for the synthesis of unsymmetrical diorganyl selenides, sulfides (thioethers), selenoesters, and thioesters by this one-pot reaction at room temperature