An organic dye photocatalyzed lactonization–alkynylation of easily accessible homoallylic cesium oxalates using ethynylbenziodoxolone (EBX) reagents has been developed. The reaction gave access to valuable functionalized lactones and lactams in up to 88% yield via the formation of two new C–C bonds. The transformation was carried out on primary, secondary, and tertiary homoallylic alcohols and primary homoallylic amines and could be applied to the synthesis of spirocyclic compounds as well as fused and bridged bicyclic lactones.

中文翻译：

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有机染料光催化通过环化-炔基化级联合成功能化内酯和内酰胺


开发了一种使用乙炔基苯并氧酮 (EBX) 试剂对易于获得的同烯丙基草酸铯进行有机染料光催化内酯化-炔基化反应。该反应通过形成两个新的 C-C 键，获得了有价值的官能化内酯和内酰胺，产率高达 88%。该转化针对伯、仲、叔高烯丙醇和伯高烯丙胺进行，可应用于螺环化合物以及稠合和桥联双环内酯的合成。