Synthesis of Substituted Thiophenes through Dehydration and Heterocyclization of Alkynols
作者:Jian Li、Yang Liu、Zebin Chen、Jiaming Li、Xiaoliang Ji、Lu Chen、Yubing Huang、Qiang Liu、Yibiao Li
DOI:10.1021/acs.joc.1c03114
日期:2022.3.4
described for obtaining a variety of substituted thiophenes with functional potential via metal-free dehydration and sulfur cyclization of alkynols with elemental sulfur (S8) or EtOCS2K in moderate-to-good yields. The method provides the base-free generation of a trisulfur radical anion (S3•–) and its addition to alkynes as an initiator. This research broadens the applications of S3•– in the synthesis
描述了一种方案,用于通过无金属脱水和硫环化炔醇与元素硫 (S 8 ) 或 EtOCS 2 K 以中等至良好的产率获得各种具有功能潜力的取代噻吩。该方法提供了无碱生成三硫自由基阴离子 (S 3 •– ) 并将其添加到炔烃中作为引发剂。本研究拓宽了S 3 •–在含硫杂环合成中的应用。