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US 6,333,426 B1Granted
Chiral adsorbents and preparation thereof as well as compounds on which the absorbents are based and preparation of the compounds
AssigneeEka Nobel AB
InventorsPer Moller, Domingo Sanchez, Stig Allenmark, Shalini Andersson
Life of this patent
Estimating the term…
Abstract
Opticallly active adsorbents based on network polymerized derivative of dicarboxylic acids, diamines or diols which are chemically bonded to a carrier. The derivatives can be polymerized by radical polymerization or through hydrosilylation in the presence of a solid carrier. The optically active adsorbents are usable for chromatographic separation of racemic mixtures of enantiomers.
Claims4
Tartaric acid derivatives having the general formula:
- wherein R1 is a group RNH—, RO—, RR′N— or HO— and R2 is a group RNHCO—, RCO—, ROCO—, R— or H—, R being an aliphatic hydrocarbon residue having up to 15 carbon atoms, an aryl group substituted with one or more groups selected from the group consisting of alkyl, hydroxy, halogen, nitro and alkenyl, an aralkyl group, a naphthyl group or an anthryl group and R′ being hydrogen or an alkyl group having up to 7 carbon atoms, the derivatives containing at least two groups R1 or R2 containing an aliphatic unsaturation, R1 being however not a phenylethyl amino residue when R2 is H.
Dependencies are inferred from the claim text.