An efficient ruthenium(II)-catalyzed, chelation-assisted C–H alkynylation of heterocycles is described using hypervalent iodine–alkyne as an alkynylating reagent. This reaction proceeds smoothly under mild conditions with high regioselectivity and good functional group tolerance, delivering the desired alkynylated indoles, thiophene, furan, and pyrrole in high yields.

中文翻译：

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螯合辅助下钌(II)-催化杂环的C-H炔基化

使用高价碘-炔烃作为炔基化试剂描述了一种高效的钌 (II) 催化、螯合辅助的 C-H 杂环炔基化反应。该反应在温和条件下顺利进行，具有高区域选择性和良好的官能团耐受性，以高产率提供所需的炔基化吲哚、噻吩、呋喃和吡咯。