Enantioselective Oxidative Gold Catalysis Enabled by a Designed Chiral P,N-Bidentate Ligand
作者:Kegong Ji、Zhitong Zheng、Zhixun Wang、Liming Zhang
DOI:10.1002/anie.201409300
日期:2015.1.19
developed P,N‐bidentate ligand enables enantioselective intramolecular cyclopropanation by a reactive α‐oxo gold carbene intermediate generated in situ. The ligand design is based on our previously proposed structure (with a well‐organized triscoordinated gold center) of the carbene intermediate in the presence of a P,N‐bidentate ligand. A C2‐symmetric piperidine ring was incorporated in the ligand as the
新开发的P,N-双齿配体可通过原位生成的反应性α-氧代金卡宾中间体实现对映选择性分子内环丙烷化。配体的设计是基于我们先前提出的在P,N-双齿配体存在下的卡宾中间体的结构(具有良好组织的三坐标金中心)。一个C 2对称的哌啶环作为含氮部分被引入配体中。最近已开发出一系列α-氧代金卡宾中间体的外消旋体转化,这一类新的手性配体可以使其不对称合成得到修饰,如本研究所示。