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US 5,510,530 AGranted
Optically active sulphur-containing amino acid derivatives
AssigneeBayer Aktiengesellschaft
InventorsMichael Grosse-Bley, Bruno Bomer, Rolf Grosser, Dieter Arlt, Walter Lange
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Abstract
The invention relates to new optically active sulphur-containing amino acid derivatives, a process for their preparation, their polymerization to give optically active polymers and the use of these optically active polymers as adsorbents for chromatographic separation of racemates into enantiomers.
Claims8
An optically active sulphur-containing amino acid derivative of the formula (I) ##STR11## in which R represents hydrogen or methyl
- R.sub.1 represents hydrogen, or together with R.sub.2 forms a methylene group or a dimethylene group which can be mono- or disubstituted by C.sub.1 -C.sub.4 -alkyl,
- R.sub.2 represents a straight-chain, branched or cyclic alkyl radical having up to 10 C atoms, C.sub.6 -C.sub.14 -aryl, or together with R.sub.1 forms a bridge described for that radical,
- R.sub.3 represents a straight-chain, branched or cyclic alkyl radical having from 4 to 20 C atoms, which is optionally mono-, di- or trisubstituted by halogen, alkoxy having 1 to 4 C atoms, aralkoxy having 7 to 16 C atoms or aryl having 6 to 10 C atoms, or a C.sub.10 -terpenyl radical, an adamantyl radical or a decahydronaphthyl radical,
- X denotes an NR.sub.4 group, in which R.sub.4 represents hydrogen or C.sub.1 -C.sub.4 -alkyl, and
- A represents a methylene or dimethylene group which is optionally mono- or di-C.sub.1 -C.sub.4 -alkyl-substituted.
2 more elements
Dependencies are inferred from the claim text.