Catalysts

Details Catalysts Catalysts

2007-06-26

2007-06-26

Green, Anthony J. (Department: 1755)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Organic compound containing

C502S102000, C502S104000, C502S117000, C502S150000, C502S152000, C502S153000, C502S154000, C502S155000, C502S157000, C585S250000, C585S275000, C585S276000, C585S277000, C585S310000, C585S500000, C585S643000

Reexamination Certificate

active

10468340

ABSTRACT:
A tethered ligand comprising the reaction product of an organofunctional silica and a ligand containing a functional group capable of reaction with said organofunctional silica, wherein the organofunctional silica is prepared from an alkyl silicate and an organofunctional silane is described. A supported catalyst is also described comprising additionally a source of catalytically-active metal. Methods for preparing the tethered ligand and supported catalyst are provided and uses of the supported catalyst for performing asymmetric reactions are claimed. The catalysts are readily separable from the reaction mixtures and may be re-used if desired.

REFERENCES:
patent: 4965234 (1990-10-01), Luft et al.
patent: 5082643 (1992-01-01), Schubert et al.
patent: 5244857 (1993-09-01), Pugin et al.
patent: 5620938 (1997-04-01), Sielcken
patent: 5627293 (1997-05-01), Pugin
patent: 6489258 (2002-12-01), Ying et al.
patent: 6528034 (2003-03-01), Pinnavaia et al.
patent: 6649083 (2003-11-01), Pinnavaia et al.
patent: 6946109 (2005-09-01), Pinnavaia et al.
patent: 0 312 102 (1989-04-01), None
patent: 0 332 970 (1989-09-01), None
patent: 0 496 699 (1992-07-01), None
patent: 0 729 969 (1996-09-01), None
patent: WO-94/04268 (1994-03-01), None
Sudo, Yoshihisa, “Optimization of end-capping of octadecyl-silylated silica gels by high-temperature silylation”, Journal of Chromatography A, 757 (1997) 21-28.
D. Allen Ennis and Eric N. Jacobsen, Polymer-Supported Chiral Co(Salen) Complexes: Synthetic Applications and Mechanistic Investigations in the Hydrolytic Kinetic Resolution of Terminal Epoxides,J. Am. Chem. Soc., vol. 121, No. 17, 1999, pp. 4147-4154.
Jacob A. Elings, Rachida Alt-Meddour, James H. Clark and Duncan J. Macquarrie, “Preparation of a silica-supported peroxycarboxylic acid and its use in the epoxidation of alkenes,”Chem. Commun., 1998, pp. 2707-2708.
Geon-Joong Kim and Dae-Woon Park, “The catalytic activity of new chiral salen complexes immobilized on MCM-41 in the asymmetric hydrolysis of epoxides to diols,”Catalysis Today, vol. 63, 2000, pp. 537-547.
International Search Report from International Application No. PCT/GB02/00527, dated Jun. 4, 2002.

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