A Highly Strained Planar-Chiral Platinacycle for Catalytic Activation of Internal Olefins in the Friedel-Crafts Alkylation of Indoles
作者:Haoxi Huang、René Peters
DOI:10.1002/anie.200804944
日期:2009.1.5
Activation by deformation: A planar‐chiral platinacycle readily prepared by diastereoselective cycloplatination enables the enantioselective intramolecular hydroarylation of indoles having disubstituted Z olefins (see scheme; Ts=p‐tolylsulfonyl). Sufficient activity is achieved by a combination of highly strained catalyst geometry and accelerated olefin coordination. This application represents the
通过变形激活:通过非对映选择性环铂易于制备的平面-手性铂环化合物可以使具有双取代Z 烯烃的吲哚进行对映选择性分子内氢芳基化反应(参见方案; Ts =对甲苯磺酰基)。通过高度应变的催化剂几何形状和加速的烯烃配位相结合,可以获得足够的活性。该申请代表了由白金环烷催化的第一个高度对映选择性反应。