Anion cascade reactions III: Synthesis of 3-isoquinuclidone bridged polycyclic lactams
作者:Zhiguo Zhang、Bingbing Shi、Xiyang Cao、Nana Ma、Hao Wu、Xingjie Zhang、Guisheng Zhang
DOI:10.1016/j.cclet.2023.109184
日期:2024.2
Bridged polycyclic lactams are important structural units in organic functional materials, natural products, and pharmaceuticals. A flexible and efficient anion cascade reaction was developed for the preparation of bridged polycyclic lactams from readily available malonamides and 1,4‑dien-3-ones. Various highly substituted bridged polycyclic lactams were synthesized in good to excellent yields by tandem
桥连多环内酰胺是有机功能材料、天然产物和药物中的重要结构单元。开发了一种灵活高效的阴离子级联反应,用于从容易获得的丙二酰胺和 1,4-二烯-3-酮制备桥联多环内酰胺。在t BuOK 存在下,在市售 EtOH 溶剂中,在 60 °C 下,通过串联亲核序列以良好至优异的产率合成了各种高度取代的桥联多环内酰胺。值得注意的是,简单的反应可以在克规模上进行。从机理上讲,双迈克尔加成反应和半胺化反应参与串联转化。