申请人:DSM N.V.
公开号:EP1013773A1
公开(公告)日:2000-06-28
Process for the preparation of an α-aminonitrile with enhanced optical purity wherein a mixture of the enantiomers of a chiral N-formyl α-aminonitrile is brought into contact with an acylase, whereby one of the enantiomers of the N-formylaminonitrile is selectively deformylated into the unprotected corresponding α-aminonitrile, and a process for the preparation of an α-aminonitrile with enhanced optical purity wherein a mixture of the enantiomers of a chiral (unprotected) α-aminonitrile is subjected to a formylation reaction in the presence of an acylase and a formylating agent whereby one of the enantiomers is selectively converted in N-formyl α-aminonitrile. Preferably a peptide deformylase with a bivalent metal ion wherein the metal is chosen from group 5-11 of the periodic system, is used as acylase, for instance a peptide deformylase chosen from the class EC 3.5.2.27 or EC 3.5.1.31. Such peptide deformylases often contain the sequences of (I) HEXXH, (ii) EGCLS and (iii) GXGXAAXQ.
The bivalent metal is preferably chosen from the group of Fe, Ni, Mn and Co, in particular Ni or Fe.
制备光学纯度更高的α-氨基腈的工艺,其中将手性 N-甲酰基α-氨基腈的对映体混合物与酰化酶接触,从而使 N-甲酰基氨基腈的对映体之一选择性地变形为未受保护的相应α-氨基腈、以及制备光学纯度更高的α-氨基腈的工艺,其中手性(未受保护)α-氨基腈的对映体混合物在酰化酶和甲酰化剂存在下进行甲酰化反应,其中一种对映体选择性地转化为 N-甲酰基α-氨基腈。优选使用带有二价金属离子的肽变形酶作为酰化酶,其中金属离子选自周期系的第 5-11 组,例如选自 EC 3.5.2.27 或 EC 3.5.1.31 类的肽变形酶。这类肽变形酶通常含有 (I) HEXXH、(ii) EGCLS 和 (iii) GXGXAAXQ 的序列。
二价金属最好选自 Fe、Ni、Mn 和 Co 组,特别是 Ni 或 Fe。