Highly Efficient Asymmetric Additions of Diethylzinc to Aldehydes Triply Activated by Chiral Phosphoramide-Zn(II) Complexes Derived From Cinchona Alkaloids
作者:Bin Shen、Huayin Huang、Guangling Bian、Hua Zong、Ling Song
DOI:10.1002/chir.22171
日期:2013.9
New chiral phosphoramide ligands derived from cinchona alkaloids were developed, which react with diethylzinc to form chiral phosphoramide‐Zn(II) complexes containing two Lewis bases and one Lewis acid. These trifunctional complexes can serve as highly efficient chiral catalysts for triple activation of enantioselective addition reactions of diethylzinc with aldehydes to give desired alcohol products
从金鸡纳生物碱衍生的新手性磷酰胺配体被开发出来,它与二乙基锌反应形成手性磷酰胺-Zn(II)配合物,其中含有两个路易斯碱和一个路易斯酸。这些三官能络合物可以用作高效的手性催化剂,用于二乙基锌与醛的对映体选择性加成反应的三重活化,从而以优异的收率和高达99%的对映体过量(ee)值提供所需的醇产物。手性25:561-566,2013。©2013 Wiley Periodicals,Inc.