作者:Jamie A. Leitch、Tatiana Rogova、Fernanda Duarte、Darren J. Dixon
DOI:10.1002/anie.201914390
日期:2020.3.2
discovery programmes and natural product synthesis. Herein, we report the photocatalytic construction of 2,7-diazabicyclo[3.2.1]octanes (bridged 1,3-diazepanes) via a reductive diversion of the Minisci reaction. The fused tricyclic product is proposed to form via radical addition to the C4 position of 4-substituted quinoline substrates, with subsequent Hantzsch ester-promoted reduction to a dihydropyridine
多样化的富含sp3的骨架环系统的构建对于药物发现计划和天然产物合成至关重要。在这里,我们通过Minisci反应的还原转移报告了2,7-二氮杂双环[3.2.1]辛烷(桥接的1,3-二氮杂庚烷)的光催化结构。提出稠合的三环产物通过自由基加成到4-取代的喹啉底物的C4位上,随后由汉茨(Hantzsch)酯促进的还原成二氢吡啶中间体,该中间体进行原位两电子环闭合以形成桥连的二氮杂环庚烷结构。广泛的N-芳基丙氨酸和喹啉衍生物被证明,在空间拥挤的全碳四元中心的构建中观察到良好的效率。