PROCESS FOR PRODUCING OPTICALLY ACTIVE ALPHA-AMINO ACID AND OPTICALLY ACTIVE ALPHA-AMINO ACID AMIDE
申请人:Mitsubishi Rayon Co., Ltd.
公开号:EP1300392A1
公开(公告)日:2003-04-09
The present invention provides a process for efficiently producing an optically active α-amino acid and an optically active α-amino acid amide. After contacting with cells or processed cells thereof having an ability to asymmetrically hydrolyse, a water solvent is substituted with at least one solvent selected from the group consisting of linear, branched, or cyclic alcohol having 3 or more carbon atoms and the optically active α-amino acid is preferentially precipitated from the alcohol solution.
The addition of basic compounds, particularly potassium compounds to the alcohol solution containing the optically active α-amino acid amide, which is obtained after the separation of the optically active α-amino acid, enables the purification of the amide without the inclusion of amino acid into amino acid amide. Thus, the amide is subjected to the step of racemization and then recycled.
本发明提供了一种高效生产光学活性α-氨基酸和光学活性α-氨基酸酰胺的工艺。在与具有不对称水解能力的细胞或其加工细胞接触后,水溶剂被至少一种选自具有 3 个或更多碳原子的线性、支链或环状醇的溶剂所取代,光学活性 α-氨基酸优先从醇溶液中析出。
在分离光学活性 α-氨基酸后得到的含有光学活性 α-氨基酸酰胺的醇溶液中加入碱性化合物,特别是钾化合物,可以在氨基酸酰胺中不加入氨基酸的情况下提纯酰胺。因此,酰胺经过消旋化步骤后便可回收利用。