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.
Copper-Catalyzed Oxyalkynylation of C–S Bonds in Thiiranes and Thiethanes with Hypervalent Iodine Reagents
作者:Julien Borrel、Guillaume Pisella、Jerome Waser
DOI:10.1021/acs.orglett.9b04157
日期:2020.1.17
We report the oxyalkynylation of thiiranes and thietanes using ethynylbenziodoxolonereagents (EBXs) to readily access functionalized building blocks bearing an alkynyl, a benzoate, and an iodide group. The reaction proceeds with high atom efficiency most likely through an alkynyl-episulfonium intermediate. The transformation is copper-catalyzed and compatible with a large array of thiiranes and thietanes