Distinct Catalytic Effect of Micellar Solution of Sodium Dodecyl Sulfate (SDS) for One-Pot Conversion of Alkyl Halides to Disulfides via an Odourless Process Using Thiourea and MnO<sub>2</sub>
one-pot odourless synthesis of symmetrical disulfides from their corresponding halides in aqueous media using thiourea and MnO 2 in the presence of NaHCO 3 or Na 2 CO 3 catalyzed by micellarsolution of sodiumdodecylsulfate (SDS) is described. By this method, primary, allylic and benzylic halides were converted into their corresponding disulfides in high yields.
描述了在 NaHCO 3 或 Na 2 CO 3 存在下,在十二烷基硫酸钠 (SDS) 胶束溶液的催化下,使用硫脲和 MnO 2 在水性介质中从相应的卤化物一锅法合成对称二硫化物的新方法。通过这种方法,伯卤化物、烯丙基卤化物和苄基卤化物以高产率转化为其相应的二硫化物。
One-pot efficient synthesis of disulfides from alkyl halides and alkyl tosylates using thiourea and elemental sulfur without contamination by higher polysulfides
An efficient and odorless synthesis of disulfides from alkyl halides usingthiourea and elemental sulfur in the presence of sodium carbonate in wet polyethylene glycol (PEG 200) at 40 °C without contamination by higher polysulfides has been developed. This procedure was then extended to preparation of disulfides from alkyl tosylates at 70 °C.
A sulfur transfer reagent was produced in situ upon stirring a mixture of KCN and CS2 in DMF at r.t. for 15 min, which after heating with an alkyl halide or aryl halide and CuI gave the corresponding symmetric dialkyl or diaryl disulfide, respectively, in high to excellent yields.
Europhtal (8020) efficiently catalyzes the aerobic oxidation of in situ generated thiols to symmetric disulfides (disulfanes)
作者:Mohammad Abbasi、Askar Sabet
DOI:10.1016/j.jorganchem.2017.02.001
日期:2017.3
has been introduced for achieving symmetric aryl disulfides in high yields by reacting aryl halides, thiourea and NaHCO3 in PEG-200 at 115–120 °C using CuI along with Europhtal catalysts. The results showed that the aerobic oxidation of in situ generated thiols proceeded efficiently in the presence of Europhtal catalyst giving the symmetric disulfide without contamination by symmetric sulfide side-product