Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Organic compound containing
Reexamination Certificate
2005-02-15
2005-02-15
Richter, Johann (Department: 1621)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Organic compound containing
C502S162000, C568S008000, C568S010000, C556S013000, C556S019000, C556S016000, C556S042000, C556S136000, C556S138000
Reexamination Certificate
active
06855657
ABSTRACT:
3,3′-Substituted chiral biaryl phosphine and phosphinite ligands and metal complexes based on such chiral ligands useful in asymmetric catalysis are disclosed. The metal complexes are useful as catalysts in asymmetric reactions, such as, hydrogenation, hydride transfer, allylic alkylation, hydrosilylation, hydroboration, hydrovinylation, hydroformylation, olefin metathesis, hydrocarboxylation, isomerization, cyclopropanation, Diels-Alder reaction, Heck reaction, isomerization, Aldol reaction, Michael addition, epoxidation, kinetic resolution and [m+n] cycloaddition. The metal complexes are particularly effective in Ru-catalyzed asymmetric hydrogenation of beta-ketoesters to beta-hydroxyesters and Ru-catalyzed asymmetric hydrogenation of enamides to beta amino acids.
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CA:139:214664 abs of Journal of Molecular Catalysis A: Chemical by Shibata et al 196(1-2) pp117-124 2003.
Ohlandt Greeley Ruggiero & Perle
Puttlitz Karl
The Penn State Research Foundation
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