A new protocol was developed to synthesize (enantioenriched) thioethers and selenoethersfrom (chiral) benzylic trimethylammonium salts and di(hetero)aryl disulfides or diselenides. These syntheses were promoted by the presence of weak base and did not require the use of any transition metal, and resulted in the target products with good to excellent yields (72–94%). Using quaternary ammonium salts
Regioselective Synthesis of Selenide Ethers through a Decarboxylative Coupling Reaction
作者:Fei-Hu Cui、Jing Chen、Shi-Xia Su、Yan-li Xu、Heng-shan Wang、Ying-ming Pan
DOI:10.1002/adsc.201700676
日期:2017.11.23
An efficient and selective approach to the synthesis of selenide ethers containing one or two geminal C–Se bonds from readily available diselenides and phenylacetic acids was developed. Compounds containing one C–Se bond were prepared by employing air as the oxidant under metal-free conditions, whereas compounds having two geminal C–Se bonds were formed via the iron(III) chloride/oxygen/cesium carbonate
已开发出一种有效的,选择性的方法,可以从容易获得的二硒化物和苯乙酸合成含一个或两个双键C-Se键的硒醚。通过在无金属条件下将空气用作氧化剂来制备包含一个C-Se键的化合物,而通过氯化铁(III)/氧/碳酸铯(FeCl 3 / O 2)形成具有两个双键C-Se键的化合物。/ Cs 2 CO 3)系统。此外,在标准反应条件下,1,2-二苯基二硫烷也可以平稳地转化为相应的硫醚产物。
An indium–TMSCl promoted reaction of diphenyl diselenide and diorganyl disulfides with aldehydes: novel routes to selenoacetals, thioacetals and alkyl phenyl selenides
作者:Brindaban C. Ranu、Amit Saha、Tanmay Mandal
DOI:10.1016/j.tet.2008.12.079
日期:2009.3
The reactions of diphenyldiselenide and dialkyl disulfides with aldehydes in the presence of In–TMSCl have been investigated. Aliphatic aldehydes provide the corresponding selenoacetals and aromatic aldehydes lead predominantly to benzyl phenyl selenides on reaction with diphenyldiselenide. However, the reaction of dimethyl disulfide and diphenyl disulfide with both aromatic and aliphatic aldehydes
Unusual Application for Phosphonium Salts and Phosphoranes: Synthesis of Chalcogenides
作者:Igor M. R. Moura、Arisson Tranquilino、Barbara G. Sátiro、Ricardo O. Silva、Diogo de Oliveira-Silva、Roberta A. Oliveira、Paulo H. Menezes
DOI:10.1021/acs.joc.1c00114
日期:2021.4.16
A novel strategy for the synthesis of sulfides and selenides from phosphonium salts and thio- or selenesulfonates, commercially available compounds, is described. When phosphoranes were used in the reaction, different products were obtained. The methodology does not require the use of metals, reactive species, or anhydrous conditions to be performed.
An iridium-catalyzed selenium-directed ortho-C–H borylation of benzyl selenide derivatives was successfully developed. This is the first example where selenium is used as a directing group in C–H borylation. The reaction was carried out using the tricyclohexylphosphine ligand for an improved catalytic efficiency. Various substrates were tolerated and afforded either ortho-monoborylated products (substrates