期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 17, 期 1, 页码 378-383出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201001602
关键词
amines; biocatalysis; biotransformations; racemization; stereochemistry
资金
- FFG
- SFG
- Province of Styria
A strategy for the biocatalytic racemization of primary alpha-chiral amines was developed by employing a pair of stereocomplementary PLP-dependent omega-transaminases. The interconversion of amine enantiomers proceeded through reversible transamination by a prochiral ketone intermediate, either catalyzed by a pair of stereocomplementary omega-transaminases or by a single enzyme possessing low stereoselectivity. To tune the system, the type and concentration of a nonchiral amino acceptor proved to be crucial. Finally, racemization could be achieved by the cross-transamination of two different amines without a requirement for an external amino acceptor. Several synthetically and industrially important amines could be enzymatically racemized under mild reaction conditions.
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