An efficient potassium hydroxide‐catalyzed alkynylation of heteroaromatic N‐oxides under transition‐metal‐free conditions with the assistance of visible‐light has been developed. Various C2‐alkynylheterocycles were obtained in up to 92% yield with good functional group tolerance. This new method is operational simple, highly efficient, atom economic, and environmental friendly.

中文翻译：

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氢氧化钾催化杂芳族N氧化物与末端炔烃的炔基化反应

在无过渡金属的条件下，借助可见光，已开发出一种有效的氢氧化钾催化的杂芳族N-氧化物的炔基化方法。获得了各种C2-炔基杂环，收率高达92％，并具有良好的官能团耐受性。这种新方法操作简单，高效，原子经济且环境友好。