Rapid construction of indole-fused 8–10 membered lactones <i>via</i> a tandem reaction
作者:Zhen Li、Shiqiang Ma、Fuhai Liu、Ruize Ma、Jipeng Zhao、Xingang Xie、Xuegong She
DOI:10.1039/d2ob01110g
日期:——
/acyl migration/aromatization reaction was developed, which enabled the rapid construction of indole-fused 8–10 membered lactones starting from cyclic 2-allyl-2-(2-nitrophenyl)-1,3-diketones. A nitro substituent in the substrates acted as both an oxygen source in the Mukaiyama hydration step and a nitrogen source in a tandem indole ring construction step. Our reaction features mild conditions, atom
开发了分子内厌氧 Mukaiyama 水合引发的串联还原/缩合/酰基迁移/芳构化反应,从而能够从环状 2-烯丙基-2-(2-硝基苯基)-1 开始快速构建吲哚稠合的 8-10 元内酯,3-二酮。底物中的硝基取代基在 Mukaiyama 水合步骤中充当氧源,在串联吲哚环构建步骤中充当氮源。我们的反应具有温和的条件、原子经济性和廉价的试剂,并且可以方便地以适度的产率放大到克级。在以往报道和对照实验的基础上,还提出了合理的反应机理。