申请人:Research Corporation Technologies, Inc.
公开号:US05175311A1
公开(公告)日:1992-12-29
A chiral catalyst is disclosed together with methods of using it for enantioselective syntheses. The chiral catalyst includes a nucleus with two metal atoms that has four bridging ligands oriented radially to the axis of the nucleus. Each of these ligands includes two complexing atoms each complexed to one of the metal atoms. At least one of the bridging ligands includes a chiral center which is bonded to one of the complexing atoms. Preferably, all four of the bridging ligands include a chiral center bonded to one of the complexing atoms. The catalyst of the invention has been found to be useful in catalyzing carbenoid transformation reactions such as cyclopropanation.
本发明揭示了一种手性催化剂及其用于对映选择性合成的方法。该手性催化剂包括具有两个金属原子的核心,该核心具有四个桥接配体,这些配体沿核心轴向径向定向。每个配体包括两个络合原子,每个络合原子与一个金属原子络合。至少一个桥接配体包括一个手性中心,该手性中心与其中一个络合原子结合。最好,所有四个桥接配体都包括与其中一个络合原子结合的手性中心。发明的催化剂已被发现在催化碳卡宾转化反应(如环丙烷化反应)中非常有用。