Palladium(0)‐Catalyzed Intermolecular Asymmetric Cascade Dearomatization Reaction of Indoles with Propargyl Carbonate
作者:Lu Ding、Run‐Duo Gao、Shu‐Li You
DOI:10.1002/chem.201900425
日期:2019.3.21
An intermolecular asymmetric cascade dearomatization reaction of indole derivatives with propargyl carbonate was developed. The challenges associated with both the chemoselectivity between the carbon and nitrogen nucleophile and the enantioselective control during the formation of an all‐carbon quaternary stereogenic center were well addressed by a Pd catalytic system derived from the Feringa ligand
进行了吲哚衍生物与碳酸炔丙酯的分子间不对称级联脱芳香化反应。碳和氮亲核试剂之间的化学选择性和对映选择性控制在全碳季铵立体异构中心形成过程中所面临的挑战,都可以通过源自Feringa配体的Pd催化体系很好地解决。一系列对映体富集的乘法取代的稠合假吲哚在良好的产率(71-86%)具有优异的对映选择性(91-96%是提供 EE()和化学选择性3 / 4:1在大多数情况下> 19)。