Separating agent for optical isomer and method for...

Liquid purification or separation – With means to add treating material – Chromatography

Reexamination Certificate

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C210S502100, C210S635000, C210S656000, C502S404000

Reexamination Certificate

active

07323101

ABSTRACT:
A separating agent which combines a high optical resolving power inherent in polysaccharide derivatives with sufficient solvent resistance and a method with which the separating agent can be produced efficiently in short steps. The separating agent for enantiomeric isomers is characterized in that a polymerizable polysaccharide derivative of a polysaccharide derivative having polymerizable functional groups and a polymerizable monomer having polymerizable unsaturated groups are copolymerized with a carrier having polymerizable functional groups to be chemically bound mutually. The separating agent is preferably used for high performance liquid chromatography (HPLC) and has an excellent solvent resistance.

REFERENCES:
patent: 5302633 (1994-04-01), Kimata et al.
patent: 6117325 (2000-09-01), Oda et al.
patent: 6217769 (2001-04-01), Okamoto et al.
patent: 0 656 333 (1995-06-01), None
patent: 0 978 498 (2000-02-01), None
patent: 4-202141 (1992-07-01), None
patent: 7-30122 (1995-04-01), None
patent: 11-171800 (1999-06-01), None
Kimata, PTO Translation No. 06-3034 of Japan Patent No. 4-202141, Mar. 2006.
Hirata, PTO Translation No. 06-3081 of Japan Patent No. 4-158260, Mar. 2006.
esp@cenet Abstract of Japan Patent No. 62-270602.
“Useful Chiral Packing Materials for High-Performance Liquid Chromatographic Resolution of Enantiomers: Phenylcarbamates of Polysaccharides Coated on Silica Gel”, by Yoshio Okamoto et al, J. Am. Chem. Soc., vol. 106, No. 18, 1984, pp. 5357-5359.
European Patent Office Search Report dated Sep. 27, 2005.

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