Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Organic compound containing
Reexamination Certificate
2005-07-26
2005-07-26
Choi, Ling-Sui (Department: 1713)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Organic compound containing
C502S103000, C502S125000, C502S162000, C502S156000
Reexamination Certificate
active
06921735
ABSTRACT:
Highly active, recoverable and recyclable transition metal-based metathesis catalysts and their organometallic complexes including dendrimeric complexes are disclosed, including a Ru complex bearing a 1,3-dimesityl-4,5-dihydroimidazol-2-ylidene and styrenyl ether ligand. The heterocyclic ligand significantly enhances the catalytic activity, and the styrenyl ether allows for the easy recovery of the Ru complex. Derivatized catalysts capable of being immobilized on substrate surfaces are also disclosed. The present catalysts can be used to catalyze ring-closing metathesis (RCM), ring-opening (ROM) and cross metatheses (CM) reactions, and promote the efficient formation of various trisubstituted olefins at ambient temperature in high yield.
REFERENCES:
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International Search Report PCT/US01/24955.
Fourkas John T.
Garber Steven
Gray Brian Lawrence
Hoveyda Amir H.
Kingsbury Jason
Campbell Evans Paula
Choi Ling-Sui
Dykeman David J.
Palmer & Dodge LLP
The Trustees of Boston College
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