Catalytic Asymmetric Michael Addition/Cyclization of Isothiocyanato Oxindoles: Highly Efficient and Versatile Approach for the Synthesis of 3,2′-Pyrrolidinyl Mono- and Bi-spirooxindole Frameworks
作者:Yi-Ming Cao、Fang-Fang Shen、Fu-Ting Zhang、Rui Wang
DOI:10.1002/chem.201204114
日期:2013.1.21
A‐spiro‐ing to greatness: The catalytic asymmetric Michael addition/cyclization of isothiocyanato oxindoles has been realized. This versatile approach provides an easy and highly efficient way to access not only the enantioselective synthesis of 3,2′‐pyrrolidinyl spirooxindole frameworks, but also the construction of enatiomerically enriched bi‐spirooxindoles containing three contiguous stereocenters
令人叹为观止:已实现异硫氰酸根合吲哚的催化不对称迈克尔加成/环化反应。这种多用途的方法不仅提供了一种简便高效的方法,不仅可以访问3,2'-吡咯烷基吡啶螺吲哚骨架的对映选择性合成,还可以构建包含三个连续的立体中心和两个螺-季四中心的对映体富集的双螺并恶二醛(参见方案) )。