申请人:Clariant GmbH
公开号:US20020052523A1
公开(公告)日:2002-05-02
The present invention relates to a process for preparing optically active cyanohydrins of the formula (II),
1
by reacting an aldehyde of the formula (I)
2
with HCN in a water-immiscible organic solvent in the presence of water, in the absence or presence of a buffer, in the presence of a (R)-hydroxynitrile lyase, where X, Y and Z in formula (II) have the same meaning as in formula (I), independently of each other are identical or different and are H, F, Cl, Br, I, OH, O(C
1
-C
4
-alkyl), OCOCH
3
, NHCOCH
3
, NO
2
or C
1
-C
4
-alkyl.
本发明涉及一种制备光学活性氰醇的方法,该氰醇的化学式为(II),通过在水不相溶的有机溶剂中,在水的存在下,在缓冲剂的存在或缺失下,以及(R)-羟基腈酶的存在下,将化学式为(I)的醛与HCN反应,其中化学式(II)中的X、Y和Z与化学式(I)中的含义相同,独立于彼此相同或不同,并且为H、F、Cl、Br、I、OH、O(C1-C4-烷基)、OCOCH3、NHCOCH3、NO2或C1-C4-烷基。