Catalytic Asymmetric Synthesis of Axially Chiral 3,3'‐Bisindoles by Direct Coupling of Indole Rings
作者:Feng‐Tao Sheng、Shuang Yang、Shu‐Fang Wu、Yu‐Chen Zhang、Feng Shi
DOI:10.1002/cjoc.202200327
日期:2022.9.15
overall excellent yields (up to 98%) with high enantioselectivities (up to 96 : 4 er). This approach not only has overcome the challenges in constructing axially chiral five-five-membered heterobiaryls, but also represents a new application of the C3-umpolung reactivity of 2-indolylmethanols in asymmetric catalysis. More importantly, this class of axially chiral 3,3'-bisindoles can undergo a variety of
通过两个吲哚环的直接偶联,设计了一种对映选择性合成轴向手性 3,3'-双吲哚的新策略。该策略利用 2-吲哚甲醇的 C3-umpolung 反应性,使 2-吲哚甲醇与合理设计的 2-取代吲哚发生催化不对称加成反应,从而以优异的产率构建轴向手性 3,3'-双吲哚支架。高达 98%)具有高对映选择性(高达 96 : 4 er)。该方法不仅克服了构建轴向手性五五元杂二芳基化合物的挑战,而且代表了 2-吲哚甲醇的 C3-umpolung 反应性在不对称催化中的新应用。更重要的是,这类轴向手性 3,3'