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 a 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.
                            本发明公开了一种手性催化剂及其用于对映选择性合成的使用方法。该手性催化剂包括一个具有两个
金属原子的核,该核具有四个桥联
配体,这些
配体沿着核轴向径向定向。每个
配体包括两个配位原子,每个配位原子配位于其中之一的
金属原子上。至少一个桥联
配体包括一个手性中心,该手性中心与其中一个配位原子键合。最好,所有四个桥联
配体都包括一个手性中心,该手性中心与其中一个配位原子键合。该发明的催化剂已被发现在催化碳烯转化反应(如
环丙烷化反应)中是有用的。