申请人:Takasago International Corporation
公开号:US05925792A1
公开(公告)日:1999-07-20
A process for preparing an optically active dihydrosphingosine derivative is disclosed, comprising reducing a (2R,3R)-2-amino-3-hydroxyalkanoic acid derivative represented by formula (III): ##STR1## wherein R.sup.3 represents a straight-chain alkyl group having 7 to 21 carbon atoms; and R.sup.4 represents an amino group protecting group, (e.g., (2R,3R)-2-benzylamino-3-hydroxyoctadecanoic acid) with sodium tetrahydroborate in the presence of an acid. The process makes it feasible to produce an optically active dihydrosphingosine at high optical purity and through a simple process that is safe and easy to industrialize.
本发明公开了一种制备光学活性二氢神经酰胺衍生物的方法,包括在酸的存在下,用四氢硼酸钠还原式(III)所表示的(2R,3R)-2-氨基-3-羟基烷酸衍生物:##STR1## 其中,R.sup.3表示具有7至21个碳原子的直链烷基;而R.sup.4表示氨基保护基,例如(2R,3R)-2-苄基氨基-3-羟基十八烷酸。该方法使得可以通过一个简单、安全、易于工业化的过程高度光学纯度地生产出光学活性二氢神经酰胺。