Dialkyl Dicyanofumarates as Oxidizing Reagents for the Conversion of Thiols into Disulfides and Selenols into Diselenides
作者:Grzegorz Mlostoń、Antonella Capperucci、Damiano Tanini、Róża Hamera-Fałdyga、Heinz Heimgartner
DOI:10.1002/ejoc.201701066
日期:2017.12.15
thiols react smoothly with dialkyl dicyanofumarates in CH2Cl2 at room temperature to give the corresponding disulfides in excellent yields. Aliphatic 1,2-, 1,3-, and 1,4-dithiols afford cyclic disulfides. Analogous reaction courses were observed starting with selenols, and the required diselenides were also formed in nearly quantitative yields. In all of the reactions, dialkyl dicyanosuccinates formed
在室温下,脂肪族和芳香族硫醇与二氰基富马酸二烷基酯在 CH2Cl2 中顺利反应,以优异的产率得到相应的二硫化物。脂肪族 1,2-、1,3- 和 1,4- 二硫醇提供环状二硫化物。从硒醇开始观察到类似的反应过程,并且所需的二硒化物也以几乎定量的产率形成。在所有反应中,二氰基琥珀酸二烷基酯以非对映异构体的 1:1 混合物形式形成,作为唯一的其他产物。半胱胺(2-巯基乙胺)表现不同;伯胺基团的迈克尔加成导致二氰基富马酸酯完全消耗,并且形成含有烯胺部分的二硫化物而没有形成二氰基琥珀酸酯。