Abstract: A product is enriched by a method for the processing of a reaction solution, in which: a) a pH value of the reaction solution is adjusted to less than 4; wherein said reaction solution comprises a whole-cell catalyst, an aqueous component, and an organic component, wherein the organic component contains a product to be enriched; and b) the reaction solution is filtered in the presence of a filter aid, thereby enriching the product.

Abstract: The present invention relates to a process for preparing, in particular, enantiomerically enriched L-?-amino acids, in particular those of the general formula (I). In this connection, the process according to the invention uses 2-ketocarboxylic acids which are converted into the desired products using a whole-cell catalyst which comprises an amino acid dehydrogenase and a cofactor-regenerating enzyme.

Abstract: The present application relates to a reaction system in which chemically valuable compounds can be obtained in high enantiomer concentrations with the aid of a coupled enzymatically operating transformation process. The coupled enzymatic reaction system comprises a cofactor-dependent enzymatic transformation of an organic compound and an enzymatic regeneration of the cofactor, wherein the reaction system operates in aqueous solution with an amount of substrate above the solubility limit thereof. In the preferred embodiments, an alcohol dehydrogenase is the cofactor-dependent enzyme, and the regeneration of the cofactor (e.g. NADH or NADPH) is acheved by means of formate dehydrogenase.

Abstract: The present invention relates to a process for preparing, in particular, enantiomerically enriched L-?-amino acids, in particular those of the general formula (I). In this connection, the process according to the invention uses 2-ketocarboxylic acids which are converted into the desired products using a whole-cell catalyst which comprises an amino acid dehydrogenase and a cofactor-regenerating enzyme.

Abstract: A product is enriched by a method for the processing of a reaction solution, in which: a) a pH value of the reaction solution is adjusted to less than 4; wherein said reaction solution comprises a whole-cell catalyst, an aqueous component, and an organic component, wherein the organic component contains a product to be enriched; and b) the reaction solution is filtered in the presence of a filter aid, thereby enriching the product.

Abstract: The present application relates to a reaction system in which chemically valuable compounds can be obtained in high enantiomer concentrations with the aid of a coupled enzymatically operating transformation process. The coupled enzymatic reaction system comprises a cofactor-dependent enzymatic transformation of an organic compound and an enzymatic regeneration of the cofactor, wherein the reaction system operates in aqueous solution with an amount of substrate above the solubility limit thereof. In the preferred embodiments, an alcohol dehydrogenase is the cofactor-dependent enzyme, and the regeneration of the cofactor (e.g. NADH or NADPH) is acheved by means of formate dehydrogenase.

Abstract: The present invention relates to processes for the preparation of enantiomerically enriched ?-amino acids. The invention also relates to advantageous esters of ?-amino acids of the general formula (I) and to the use thereof in the enzymatic preparation of enantiomerically enriched ?-amino acids.

Abstract: A process is described for preparing optically active ?-atninocarboxylic acids from racemic N-acylated ?-aminocarboxylic acids by cnantiosclccthc hydrolysis of the N-acylated ?-aminocarboxylic acid in the presence of a hydrolase by way of biocatalyst, wherein the N-acyl substituent of the N-acylated ?-aminocarboxylic acid (I) exhibits Structure I in which R1, R2 are each selected, independently of one another, from H, halogen, alkiyl residues, OH, alkoxy residues and aryloxy residues; R3 is selected from halogen, alkoxy residues and aryloxy residues; (II) Structure IIA or IIB or the structure of the corresponding salts or (III) Structure III or the structure of the corresponding salt.

Abstract: The present invention relates to processes for the preparation of enantiomerically enriched ?-amino acids. The invention also relates to advantageous esters of ?-amino acids of the general formula (I) and to the use thereof in the enzymatic preparation of enantiomerically enriched ?-amino acids.

Abstract: The present invention relates to processes for the preparation of enantiomerically enriched ?-amino acids. The invention also relates to advantageous esters of ?-amino acids of the general formula (I) and to the use thereof in the enzymatic preparation of enantiomerically enriched ?-amino acids.

Abstract: The present invention relates to processes for the preparation of enantiomerically enriched &bgr;-amino acids.