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。