已经描述了一种有效且温和的 KO t Bu 促进的邻碘硫代苯胺的分子内 C-S 交叉偶联以及催化量的菲咯啉作为添加剂,用于方便地合成 2-取代苯并噻唑。该方法适用于获得多种 2-烷基和 2-芳基取代的苯并噻唑。单晶 XRD、DFT 计算、NMR 和 UV 研究表明,邻碘硫代苯胺单元之间的卤素键可能有助于电子转移过程。
Room-Temperature Ligand-Free Pd/C-Catalyzed C–S Bond Formation: Synthesis of 2-Substituted Benzothiazoles
作者:Yannan Cheng、Qian Peng、Weigang Fan、Pixu Li
DOI:10.1021/jo5002752
日期:2014.6.20
The synthesis of 2-substituted benzothiazoles has been achieved via cyclization of o-iodothiobenzanilide derivatives using Pd/C as the catalyst at room temperature. The protocol is ligand-free, additive-free, and high-yielding and involves very mild conditions.