Treatment of N-(1-alkynyl)amides and 1-alkynyl sulfides with diphenyldithiophosphinic acid affords (E)-ketene N,S-acetals and S,S-acetals, respectively. The addition reactions proceed in syn fashio...
We developed a simple and efficient method for the synthesis of functionalized unsymmetrical alkynyl sulfides under mild conditions in good yields. The designed method is based on the reaction of 5,5-dimethyl-2-thioxo-1,3,2-dioxaphosphorinan-2-disulfanyl derivatives with lithium acetylides. The developed method allows the preparation of unsymmetrical alkynyl sulfides bearing additional hydroxyl, carboxyl
Metal-free direct thiolation of terminal alkynes with methyl sulfoxides
作者:Chen Chen、Liangliang Pan、Jinchen Zhu、Junfa Shao、Jiaming Dai、Guoying Qian、Zhouting Rong
DOI:10.1016/j.tetlet.2022.154275
日期:2023.1
A metal-free method has been developed for the direct thiolation of terminal alkynes with methyl sulfoxides, which affords various alkynyl sulfides. This transformation features excellent functional group tolerance, good stability in large-scale preparation and atom economy, which makes this reaction a practical method for the synthesis of alkynyl sulfides.