Thioether-Directed Platinum-Catalyzed Hydrosilylation of Olefins
作者:Joe B. Perales、David L. Van Vranken
DOI:10.1021/jo010214e
日期:2001.11.1
Homoallylic thioethers facilitate the platinum-catalyzedhydrosilylation of olefins with phenyldimethylsilane. As a control, thioether substrates are shown to hydrosilylate at room temperature under conditions where no hydrosilylation is observed for isosteric substrates that lacked thioether groups. Modest diastereoselection is observed, between 2 and 5 to 1. Hydrogenation is a competing reaction
Copper catalyzed reaction of alcohols, alkyl halides and Na<sub>2</sub>S<sub>2</sub>O<sub>3</sub>: an odorless and ligand-free route to unsymmetrical thioether synthesis
作者:Rahimeh Khezri、Mohammad Abbasi
DOI:10.1039/d2nj03164g
日期:——
A CuI-catalyzed condensation reaction between alcohols, alkylhalides, and Na2S2O3 leading to structurally diverse thioethers is reported. A variety of alkylhalides and electron-rich benzyl alcohols were employed successfully in the presence of 5 mol% CuI in PEG-200 at 110 °C. The method does not require any ligands or additives. The unsymmetrical thioethers were achieved in good to excellent yields
据报道,CuI 催化的醇、卤代烷和 Na 2 S 2 O 3之间的缩合反应产生了结构多样的硫醚。在 110 °C 下,在 PEG-200 中存在 5 mol% CuI 的情况下,成功地使用了多种烷基卤化物和富电子苯甲醇。该方法不需要任何配体或添加剂。不对称硫醚在适当的反应时间内以良好至优异的产率获得。
A metal-free and recyclable synthesis of benzothiazoles using thiourea as a sulfur surrogate
Using odorless thiourea as the S source, benzothiazoles and asymmetric disulfides could be obtained from thioformanilides through the tandem cyclization/nucleophilic addition/hydrolysis/nucleophilic substitution reaction. Furthermore, the obtained asymmetric disulfides could readily transfer to benzothiazoles after nitro-reduction and amide formation reaction. This metal-free and recyclable synthetic methodology offered a time-efficient, less expensive, and environmentally friendly alternative to multifunctional benzothiazoles. (C) 2015 Elsevier Ltd. All rights reserved.