triazolium organocatalyst has been designed and demonstrated to effect asymmetric homo- and heterodialkylations of various bisoxindoles, enabling enantioselective construction of vicinal all-carbon quaternary stereocenters. These reactions feature excellent enantio- and diastereoselectivities (up to 99% ee and >20:1 dr) as well as good to high yields (up to 89% over two steps). As an application of
设计并证明了一种新型手性螺环酰胺 (
SPA) 衍生的三唑鎓有机催化剂可实现各种双氧
吲哚的不对称同二烷基化和杂二烷基化,从而实现邻位全碳四元立体中心的对映选择性构建。这些反应具有出色的对映选择性和非对映选择性(高达 99% ee 和 >20:1 dr)以及良好的产率(两步高达 89%)。作为该方法的应用,已经实现了 (-)-chimonanthidine 的第一个不对称全合成。