摘要:
The present invention relates to a whole cell catalytic system for the preparation of an enantiomerically enriched α-amino acid from a corresponding hydantoin wherein hydantoinase, L-carbamoylase and hydantoin racemase are coexpressed in a recombinant micro-organism wherein the genes coding for these three enzymes are located on a single replicon. The present invention further relates to the use of such a whole cell catalytic system according in the preparation of an enantiomerically enriched L-α-amino acid from a corresponding hydantoin.
摘要:
The present invention relates to 5-substituted hydantoins, a process for the preparation of 5-substituted hydantoins and the use of 5-substituted hydantoins in the preparation of enantiomerically enriched α-amino acids. Furthermore, the present invention relates to the preparation of pharmaceutically active products such as perindopril and ramipril using the novel 5-substituted hydantoins.
摘要:
The present invention relates to 5-substituted hydantoins, a process for the preparation of 5-substituted hydantoins and the use of 5-substituted hydantoins in the preparation of enantiomerically enriched α-amino acids. Furthermore, the present invention relates to the preparation of pharmaceutically active products such as perindopril and ramipril using the novel 5-substituted hydantoins.
摘要:
A method of producing enzyme preparations having L-.alpha.-amino acyl amidase activity comprising cultivating a micro-organism selected from the group consisting of Pseudomonas putida, Pseudomonas reptilivora, and Pseudomonas arvilla in a nutrient medium and separating an enzyme preparation from said nutrient medium.A process of preparing L-.alpha.-amino acid and D-.alpha.-amino acid amide from DL-.alpha.-amino acid amide by contacting said DL-.alpha.-amino acid amide with an enzyme preparation obtained by cultivating a micro-organism selected from the group consisting of Pseudomonas putida, Pseudomonas reptilivora, and Pseudomonas arvilla in the presence of a nutrient medium and separating the L-.alpha.-amino acid and D-.alpha.-amino acid amide thus formed.
摘要:
The invention relates to isolated polypeptides having α-H-α-amino acid amide racemase activity and nucleic acids encoding the same. The invention also relates to vectors and host cells comprising the nucleic acids according to the invention. The invention also relates to methods of producing and using the polypeptides according to the invention. The invention also relates to a method for isolating polypeptides having α-H-α-amino acid amide racemase activity, for isolating nucleic acids encoding the same and for isolating microorganisms comprising polypeptides having α-H-α-amino acid amide racemase activity. The invention also relates to new microorganisms comprising polypeptides having α-H-α-amino acid amide racemase activity.
摘要:
The invention relates to a process for the preparation of (4-hydroxy-6-oxo-tetrahydro-pyran-2-yl)-acetonitrile from 6-X-substituted-methyl-4-hydroxy-tetrahydro-pyran-2-one, wherein X stands for a leaving group, by reacting 6-X-substituted-methyl-4-hydroxy-tetrahydro-pyran-2-one with a cyanide ion in water and by subsequent lowering of the pH to a pH between 0 and 5. (4-hydroxy-6-oxo-tetrahydro-pyran-2-yl)-acetonitrile and other compounds obtainable from (4-hydroxy-6-oxo-tetrahydro-pyran-2-yl)-acetonitrile may suitably be used in the preparation of a pharmaceutical preparation, more in particular in the preparation of statins, more in particular in the preparation of Atorvastatine or a salt thereof, for instance its calcium salt. The invention also relates to (4-hydroxy-6-oxo-tetrahydro-pyran-2-yl)-acetonitrile and other compounds obtainable therefrom.
摘要:
The invention relates to a hydroxy-aromatic resin, prepared by bringing together and reacting a hydroxy-aromatic compound and glyoxylic acid.The invention further relates to use of the resin in adhesives, laminates, and coatings.
摘要:
The invention relates to a hydroxy-aromatic resin, prepared by bringing together and reacting a hydroxy-aromatic compound and glyoxylic acid,The invention further relates to use of the resin in adhesives, laminates, and coatings.
摘要:
The invention relates to isolated polypeptides with hydantoin recemase activity, that do not suffer from substrate inhibition. Such polypeptides arc for instance isolated polypeptides with at least 87% identity with SEQ ID: NO. 2 or SEQ ED: NO. 4. The invention also relates to nucleic acid sequences encoding these polypeptides. The invention also relates to processes for the racemisation of enantiomerically enriched hydantoin compounds and to processes for the preparation of enantiomarically enriched I)-or I-α amino acids.
摘要翻译:本发明涉及具有乙内酰脲接收活性的分离的多肽,其不受底物抑制。 这样的多肽例如与SEQ ID NO:具有至少87%同一性的分离的多肽。 2或SEQ ED:NO。 本发明还涉及编码这些多肽的核酸序列。 本发明还涉及对映体富集的乙内酰脲化合物的外消旋化方法以及制备对映体富集的I) - 或I-α氨基酸的方法。
摘要:
The invention relates to a sulphonic acid salt of an amino acid alkyl ester The invention further relates to a process for the esterification of an organic acid into the corresponding organic acid ester comprising bringing the organic acid into contact with a strong acid and a solution comprising dialkylcarbonate in a reaction mixture. The invention further relates to the use of a sulphonic acid salt of an amino acid alkyl ester in the synthesis of a β-lactam antibiotic.