An efficient and convenient strategy to synthesize diverse 3-sulfonylspiro[4,5]trienones has been developed. This ipso-carbosulfonylation of alkynes proceeds by visible-light catalysis under transition-metal-free conditions and represents a new sulfonylation and ipso-cyclization of alkynes. In this transformation, the O atom in the newly generated carbonyl is derived from H2O and it features a broad substrates scope, especially for alkyl propiolamides and aliphatic sulfonyl chlorides.

中文翻译：

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可见光介导的炔烃 ipso-Carbosulfonylation：在无过渡金属条件下由丙吡胺和磺酰氯合成 3-磺酰基螺[4,5]三烯酮

已开发出一种高效便捷的合成多种 3-磺酰基螺[4,5] 三烯酮的策略。这种炔烃的同位碳磺酰化在无过渡金属条件下通过可见光催化进行，代表了炔烃的新磺酰化和同位环化。在这种转化中，新生成的羰基中的 O 原子来源于 H2O，它具有广泛的底物范围，特别是对于烷基丙酰胺和脂肪族磺酰氯。