摘要:
The invention relates to mutated penicillin acylases having a high synthesis/hydrolysis ratio in comparison with wild-type penicillin acylases and at least 1% of the activity. The invention also relates to a process for the enzymatic preparation of a β-lactam antibiotic from a β-lactam nucleus and an activated side chain with the aid of mutated penicillin acylases.
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% idcntity 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。 这样的多肽例如是与SEQ ID NO:具有至少87%的亲和性的分离的多肽。 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-I-I-α氨基酸的方法。
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.