申请人:Duphar International Research B.V.
公开号:US05329023A1
公开(公告)日:1994-07-12
The invention relates to a method of preparing optically active alcohols which consist substantially (at least 75% e.e.) or entirely of one enantiomer of formula 4 ##STR1## wherein R and A are as defined therein. The method comprises, which maintaining enantiomeric excess, converting an optically active cyanohydrin of formula 1 ##STR2## into optically active protected cyanohydrin of formula 2 ##STR3## converting the protected cyanohydrin of formula 2 into an optically active compound of formula 3 ##STR4## removing the protecting group B.
该发明涉及一种制备光学活性醇的方法,其主要由公式4的一个对映体构成,该对映体的光学纯度至少为75%(至少75% e.e.)或完全由一个对映体组成,其中R和A的定义如上所述。该方法包括,在保持对映体过量的同时,将公式1的光学活性氰醇转化为公式2的光学活性保护氰醇,将公式2的保护氰醇转化为公式3的光学活性化合物,然后去除保护基B。