METHOD OF OBTAINING INDOXYLIC OR THIOINDOXYLIC ESTERS OF AMINO ACIDS OR PEPTIDES

The present invention provides a diagnostic agent for the detection of proteolytic enzymes, comprising an absorbent carrier, a film layer, a powder mixture, a lyophilisate, a solution or a reagent tablet, containing at least one chromogen and an appropriate buffer substance, wherein the chromogen us...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	FRANTS BRAUN,DE, VERNER GYUTLYAJN,DE, DITER BERGER,DE, MANFRED KUR,DE, VOLFGANG VERNER,DE
Format:	Patent
Sprache:	eng
Schlagworte:	BEER BIOCHEMISTRY CHEMISTRY COMPOSITIONS OR TEST PAPERS THEREFOR CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL ORENZYMOLOGICAL PROCESSES ENZYMOLOGY HETEROCYCLIC COMPOUNDS INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEICACIDS OR MICROORGANISMS METALLURGY MICROBIOLOGY MUTATION OR GENETIC ENGINEERING ORGANIC CHEMISTRY PEPTIDES PHYSICS PROCESSES OF PREPARING SUCH COMPOSITIONS SPIRITS TESTING VINEGAR WINE
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Beschreibung
Zusammenfassung:	The present invention provides a diagnostic agent for the detection of proteolytic enzymes, comprising an absorbent carrier, a film layer, a powder mixture, a lyophilisate, a solution or a reagent tablet, containing at least one chromogen and an appropriate buffer substance, wherein the chromogen used is an indoxyl- and/or thioindoxyl-amino acid ester and/or peptide ester of the general formula: wherein R1, R2, R3 and R4, which can be the same or different, are hydrogen or halogen atoms, lower alkyl, lower alkoxy, aryl, aralkyl, aralkoxy, hydroxyl, carboxy, carboxy lower alkoxy, aralkoxycarbonyl, aralkyloxycarbonyl lower alkoxy, nitro or lower acylamino radicals, whereby two adjacent substituents can also represent an optionally halogenated fused benzene ring, X is a sulphur atom or an imino group optionally substituted by a lower alkyl, aryl, aralkyl or acyl radical, A is an amino acid or peptide residue and B is a nitrogen protective group conventional in peptide chemistry or derived therefrom. The present invention also provides new compounds of the above-given general formula and processes for the preparation thereof. Furthermore, the present invention is concerned with the use of the compounds of the above-given general formula for the production of diagnostic agents for the detection of proteolytic enzymes.