An efficient synthetic approach for the synthesis of 5‐fluoro‐cyclopentenones containing a fluorine‐substituted carbon stereocenter that relies on gold(I)‐catalyzed cycloisomerization and fluorination sequence of 1,3(4)‐enyne esters with N‐fluorbenzensulfonimide (NFSI) is described. This tandem transformation exhibited a broad substrate scope and excellent functional group compatibility, providing a novel protocol for rapid assembly 5‐fluoro‐cyclopentenones in good to excellent yields under mild reaction conditions. The mechanistic studies revealed that the transformation involves a gold‐catalyzed cycloisomerization and electrophilic fluorination cascade to give the 5‐fluoro‐cyclopentenones.

中文翻译：

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金（I）催化串联Cyclosoomerization和1,3（4）-Enyne酯的氟化与NFSI：5氟环戊烯酮的一锅组装

一种有效的合成方法，其合成一个含氟取代的碳立构中心的5-氟-环戊烯酮，该中心依赖于金（I）催化的1,3（4）-烯炔酯与N-氟苯甲磺酰亚胺（NFSI）的环异构化和氟化序列描述。这种串联转化表现出广泛的底物范围和出色的官能团相容性，为在温和的反应条件下以良好或优异的产率快速组装5-氟-环戊烯酮提供了一种新颖的方案。机理研究表明，转化涉及金催化的环异构化和亲电氟化级联反应，生成5-氟-环戊烯酮。