Synergistic Ir/Cu Catalysis for Asymmetric Allylic Alkylation of Oxindoles: Enantio‐ and Diastereoselective Construction of Quaternary and Tertiary Stereocenters
作者:Tianhong Wang、Youbin Peng、Guanlin Li、Yicong Luo、Yong Ye、Xiaohong Huo、Wanbin Zhang
DOI:10.1002/chem.202101267
日期:2021.7.16
quaternary and tertiary stereogenic centers are privileged structural motifs, which widely exist in pharmaceutical and natural products. Herein, a highly regio-, enantio-, and diastereoselective allylic alkylation of 3-alkyl oxindoles through synergistic iridium and copper catalysis is described, which provides a series of 3,3-disubstituted oxindole derivatives containing adjacent quaternary and tertiary
带有四级和三级立体中心的 3,3-二取代 oxindoles 是特权结构基序,广泛存在于药物和天然产品中。在此,描述了通过协同的铱和铜催化对 3-烷基羟吲哚进行高度区域选择性、对映选择性和非对映选择性烯丙基烷基化,该方法以优异的产率提供了一系列含有相邻季和叔立体中心的 3,3-二取代羟吲哚衍生物、对映体过量和非对映体比率(对于 30 个实例,高达 97% 的产率、>99% ee 和 >20:1 dr)。该方法提供独特的支化选择性、出色的对映选择性和非对映选择性以及良好的功能兼容性。