Chiral porous zirconium phosphonates containing metal complex moieties are provided, synthesized via a molecular building block approach, and characterized by a variety of techniques including TGA, adsorption isotherms, XRD, SEM, IR, and microanalysis. These hybrid solids may be used for enantioselective heterogeneous asymmetric hydrogenation of aromatic ketones with remarkably high e.e. values of up to 99.2%. Similarly prepared chiral porous solids may be used for asymmetric hydrogenation of &bgr;-keto esters with e.e.'s of up to 95%. The solid catalysts can also be easily recycled and reused multiple times without the loss of activity and enantioselectivity. Ready tunability of such a molecular building block approach allows the optimization of these hybrid materials to provide practically useful heterogeneous asymmetric catalysts.
提供含有
金属配合物基团的手性多孔
氧化锆膦酸盐,通过分子建筑模块方法合成,并通过多种技术进行表征,包括TGA、吸附等温线、XRD、
SEM、IR和微量分析。这些混合固体可用于对
芳香酮进行手性选择性的非均相不对称加氢,其对映体过量值高达99.2%。类似地制备的手性多孔固体可用于对β-
酮酯进行不对称加氢,其对映体过量值可高达95%。这种固体催化剂还可以轻松回收和多次重复使用,而不会丧失活性和手性选择性。这种分子建筑模块方法的便捷可调性允许优化这些混合材料,提供实用的非均相手性催化剂。