Switchable Stereoselectivity: The Effects of Substituents on the D2-Symmetric Biphenyl Backbone of Phosphoramidites in Copper-Catalyzed Asymmetric Conjugate Addition Reactions with Triethylaluminium
作者:Han Yu、Fang Xie、Zhenni Ma、Yangang Liu、Wanbin Zhang
DOI:10.1002/adsc.201101007
日期:2012.7.9
A highly enantioselective copper‐catalyzed conjugate addition with triethylaluminium was developed using phosphoramidite ligands bearing a D2‐symmetric biphenyl backbone. For these ligands we demonstrated that the 3,3′,5,5′‐substituents on the biphenyl backbone can completely reverse the absolute configuration of the products.
使用带有D 2对称联苯骨架的亚磷酰胺配体,开发了具有三乙基铝的高对映选择性的铜催化共轭加成物。对于这些配体,我们证明了联苯主链上的3,3',5,5'-取代基可以完全逆转产物的绝对构型。