Organic compounds -- part of the class 532-570 series – Organic compounds – Heavy metal containing
Reexamination Certificate
2005-04-12
2005-04-12
Nazario-Gonzalez, Porfirio (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heavy metal containing
C556S028000, C502S162000, C502S166000, C568S862000
Reexamination Certificate
active
06878838
ABSTRACT:
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 β-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.
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Hu Aiguo
Lin Wenbin
Ngo Helen L.
Jenkins & Wilson & Taylor, P.A.
Nazario-Gonzalez Porfirio
The University of North Carolina at Chapel Hill
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