A catalyst‐free electrochemical alkylacetoxylation reaction of terminal alkynes with (thio)xanthenes and carboxylic acids is developed. Treating the addition products with K2CO3 as a base in methanol affords the ketones in moderate to good yields. Preliminary experimental and computational studies indicate that the benzylic cation generated from the (thio)xanthenes triggers the electrophilic addition to alkynes.

中文翻译：

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电化学苄基阳离子触发末端炔烃和羧酸的烷基乙酰氧基化

开发了末端炔烃与（硫代）呫吨和羧酸的无催化剂电化学烷基乙酰氧基化反应。在甲醇中用 K2CO3 作为碱处理加成产物，得到中等至良好产率的酮。初步实验和计算研究表明，(硫代)呫吨产生的苄基阳离子触发了炔烃的亲电加成。