Aromatic substitution. 46. Methyl (ethyl) thio(dithio)carboxylation of aromatics with S-methyl(5-ethyl)thiocarboxonium and -dithiocarboxonium fluoroantimonates
Palladium-catalyzed intermolecular transthioetherification of aryl halides with thioethers and thioesters
作者:Yahui Li、Gao Bao、Xiao-Feng Wu
DOI:10.1039/c9sc05532k
日期:——
Functional group transfer reactions are an important synthetic tool in modern organic synthesis. Herein, we developed a new palladium-catalyzed intermolecular transthioetherification reaction of arylhalides with thioethers and thioesters. The synthetic utility and practicality of this catalytic protocol are demonstrated in a wide range of successful transformations (>70 examples). This catalytic protocol
Unsymmetrical thiocarbonyl disulfides (3) have been easily synthesized in good yields by the reaction of piperidinium dithiocarboxylates with sulfenyl chlorides. In the reaction of these disulfides with nucleophiles (amine and metal alkoxide), both thiocarbonyl carbon and sulfenyl sulfur atom seem to be attacked by nucleophiles. By desulfurization with triphenylphosphine thiocarbonyl disulfides converted
Palladium-Catalyzed Carbonylative Synthesis of Aryl Selenoesters Using Formic Acid as an <i>Ex Situ</i> CO Source
作者:Danilo Yano de Albuquerque、Wystan K. O. Teixeira、Manoela do Sacramento、Diego Alves、Claudio Santi、Ricardo S. Schwab
DOI:10.1021/acs.joc.1c02608
日期:2022.1.7
A new catalytic protocol for the synthesis of selenoesters from aryl iodides and diaryl diselenides has been developed, where formic acid was employed as an efficient, low-cost, and safe substitute for toxic and gaseous CO. This protocol presents a high functional group tolerance, providing access to a large family of selenoesters in high yields (up to 97%) while operating under mild reaction conditions
已经开发了一种用于从芳基碘化物和二芳基二硒化物合成硒代酯的新催化方案,其中甲酸被用作有毒和气态 CO 的有效、低成本和安全的替代品。该协议具有高官能团耐受性,在温和的反应条件下以高产率(高达 97%)获得一大类硒代酯,避免使用难以操作、易氧化且气味难闻的硒醇。此外,通过首次使用二有机基二硫化物作为前体,该方法可以有效地扩展到具有中等至优异产率的硫酯的合成。
Indium-Catalyzed Direct Conversion of Lactones into Thiolactones Using a Disilathiane as a Sulfur Source
An indium-catalyzed reaction of lactones and a disilathiane leading to thiolactones is described. The direct synthesis of thiolactones from lactones with an appropriate sulfur source is one of the most attractive approaches in organic and pharmaceutical chemistry. In this context, we found an indium-catalyzed direct conversion of lactones into thiolactones in the presence of elemental sulfur and a
Palladium Catalyzed Direct Carbonylative Thiomethylation of Aryldiazonium Salts and Amines with 4-(Methylthio)-2-Butanone as (Methylthio) Transfer Agent
作者:Qingqiang Tian、Shasha Xu、Chiying Zhang、Xinyi Liu、Xiangwei Wu、Yahui Li
DOI:10.1021/acs.joc.1c00665
日期:2021.7.2
Herein, an interesting palladium-catalyzed procedure for the direct carbonylative thiomethylation of aromatic amine derivatives with 4-methylthio-2-butanone is developed. Using 4-methylthio-2-butanone as (methylthio) transfer agent, a variety of corresponding thioesters are obtained with moderate to good yields under base-free condition. In addition, good functional group tolerance can be observed