Asymmetric Dearomatization of Indole Derivatives with N‐Hydroxycarbamates Enabled by Photoredox Catalysis
作者:Yuan‐Zheng Cheng、Qing‐Ru Zhao、Xiao Zhang、Shu‐Li You
DOI:10.1002/anie.201911144
日期:2019.12.9
enantioselectivities. Mechanistic studies show that the realization of two sequential single-electron transfer oxidations of the indole derivatives is key, generating the configurationally biased carbocation species while providing the source of stereochemical induction. These results not only provide an efficient synthesis of enantioenriched indoline derivatives, but also offer a novel strategy for further designing
吲哚的脱芳香化为取代的二氢吲哚提供了有效的合成途径。在大多数情况下,吲哚充当亲核试剂。此处报道的是充当亲电子试剂的吲哚衍生物的不对称脱芳香化反应。光催化剂和手性磷酸向大气开放相结合,可释放吲哚的蛋白反应性,从而使其能够与N-羟基氨基甲酸酯作为亲核试剂脱芳香化。以优异的产率和中等至高对映选择性构造了各种带有有趣的氧胺的稠合二氢吲哚。机理研究表明,吲哚衍生物的两个顺序单电子转移氧化的实现是关键,可产生构型偏向的碳正离子物种,同时提供立体化学诱导的来源。