Oxiranes react smoothly with thiourea in the presence of β-cyclodextrin in water at room temperature under neutral conditions to afford the corresponding thiiranes in excellent yields; the β-cyclodextrin can be recycled.
Synthesis of Thiiranes from Oxiranes in the Presence ofβ-Cyclodextrin in Water
作者:N. Srilakshmi Krishnaveni、K. Surendra、M. Somi Reddy、Y. V. D. Nageswar、K. Rama Rao
DOI:10.1002/adsc.200303179
日期:2004.3
efficient, user-friendly procedure has been developed for the conversion of oxiranes to thiiranes under supramolecular catalysis in the presence of β-cyclodextrin in water at ambient temperature in excellent yields. The use of β-cyclodextrin in this transformation overcomes the use of heavy metal halides as promoters and chlorinatedhydrocarbons and other hazardous organic solvents.
An efficient catalyst-free synthesis of thiiranes from oxiranes using polyethylene glycol as the reaction medium
作者:Biswanath Das、V. Saidi Reddy、M. Krishnaiah
DOI:10.1016/j.tetlet.2006.09.153
日期:2006.11
A catalyst-free, high-yielding conversion of oxiranes into thiiranes has efficiently been carried out by treatment with KSCN or thiourea at room temperature using polyethyleneglycol (PEG-400) as the reaction medium.
Facile synthesis of thietanes via ring expansion of thiiranes
作者:Jun Dong、Jiaxi Xu
DOI:10.1039/c6ob02387h
日期:——
Thietanes are pharmaceutically important cores of some biological compounds and intermediates of organic synthesis. Various thietanes were prepared from thiiranes via ring expansion through a reaction with trimethyloxosulfonium iodide in the presence of sodium hydride. The reaction process is a nucleophilic ring-opening reaction of thiiranes with dimethyloxosulfonium methylide, generated from trimethyloxosulfonium