Odourless Strategy for Deep Eutectic Solvent-Mediated Ring Opening of Epoxides with In Situ Generated S-Alkylisothiouronium Salts
摘要:
A general, straightforward and odourless ring-opening reaction allows the preparation of beta-hydroxy sulfides from in situ generated S-alkylisothiouronium salts in urea-choline chloride-based deep eutectic solvent (DES). In addition, reaction of epoxides with thiourea in DES yields the corresponding thiiranes.
Erbium(III) Triflate is a Highly Efficient Catalyst for the Synthesis of β-Alkoxy Alcohols, 1,2-Diols and β-Hydroxy Sulfides by Ring Opening of Epoxides
ring-opening reaction of epoxides with erbium(III) triflate are described. Epoxides can be cleaved under neutral conditions with alcohols and thiols in the presence of catalytic amounts of Lewis acid, affording the corresponding β-alkoxy alcohols and β-hydroxy sulfides in high yields. In water, epoxide ring opening occurs to produce the corresponding diols in good yields epoxides - Lewis acids - nucleophilic
JandaJel as a polymeric support to improve the catalytic efficiency of immobilized-1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) under solvent-free conditions
JandaJel, with its greater spacing between the linear polymeric chains compared to that of polystyrene matrices, is a very efficient support for improving the catalytic efficiency of TBD under SolFC.
A Simple and Convenient Method for Preparation of Sulfides
作者:Marta Feroci、Achille Inesi、Leucio Rossi
DOI:10.1080/00397919908086421
日期:1999.8.1
tetraethylammonium carbonate (TEAC) obtained respectively by chemical and electrochemical way, react with thiols in acetonitrile affording, after addition of a suitable alkylating reagent, the corresponding sulfides in high to excellent yields.
Solid–Liquid Phase-transfer Catalytic Synthesis of Chiral Glycerol Sulfide Ethers Under Microwave Irradiation†
作者:Jing-Xian Wang、Yumei Zhang、Danfeng Huang、Yulai Hu
DOI:10.1039/a708058a
日期:——
Epoxypropoxyphenols react with benzenethiols under phase-transfer catalysis and microwave irradiation to give chiral glycerol sulfide ethers, this procedure is simple, rapid and efficient.
Abstract Epoxides are regioselectively cleaved by zinc thiolate intermediate, generated from disulfides in the presence of Zn/AlCl3 system, to afford high yields of the corresponding β-hydroxy sulfides.