申请人:Takasago International Corporation
公开号:EP1398310A1
公开(公告)日:2004-03-17
The disclosure describes a process for the preparation of cyclic optically active amino alcohols of formula (I) by reacting an optically active hydroxycarboxylate of formula (IV) with hydrazine to form an optically active hydroxycarboxylic hydrazide compound of formula (III), then conducting a Curtius reaction in the presence of an alcohol to give an optically active alkoxycarbonylamino alcohol of formula (II), followed by deprotecting the amino group to form the amino alcohol of formula (I).
The variables A1, A2, R1-R6, m, n and * are as defined in the claims.
该披露描述了一种制备公式(I)的环状光学活性氨醇的过程,方法是将公式(IV)的光学活性羟基羧酸酯与肼反应,形成公式(III)的光学活性羟基羧酰肼化合物,然后在醇的存在下进行Curtius反应,得到公式(II)的光学活性烷氧羰基氨醇,然后去保护氨基以形成公式(I)的氨基醇。变量A1、A2、R1-R6、m、n和*的定义如索赔中所述。