申请人:Degussa Aktiengesellschaft
公开号:US05744611A1
公开(公告)日:1998-04-28
A process is disclosed for reducing amino acids and derivatives thereof Compounds of formula (I), in which n=0 or 1 and R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 have the meanings given in the description, are reduced to the corresponding amino alcohols of formula (II): the formula (I) compounds are converted in a first step, in at least one alcohol and with the addition of acid and heat to an ester, this process producing a reaction mixture containing the ester; the ester is converted in a second reaction step with alkali or alkaline earth borohydride to compounds of formula II. By specifying that the second step be carried out without isolating the ester from the reaction mixture and by using alkali or alkaline earth borohydrides which are not activated, the invention facilitates the production from amino acids and their derivatives of the correponding alcohols in a simple "single vessel" process, with high yields and in such a way as to preserve a given centre of chirality. Applications: synthesis components, preparation of optically active compounds splitting of racemic compounds. ##STR1##
揭示了一种用于还原氨基酸及其衍生物化合物的过程,其中化合物的公式为(I),其中n=0或1,R.sup.1,R.sup.2,R.sup.3,R.sup.4,R.sup.5和R.sup.6的含义如描述中所示,被还原为相应的氨基醇的化合物,其公式为(II):公式(I)的化合物在第一步中转化为至少一种醇,并添加酸和加热以形成酯,该过程产生包含酯的反应混合物;酯在第二个反应步骤中与碱或碱土金属硼氢化物转化为公式II的化合物。通过指定第二步骤在不从反应混合物中分离酯的情况下进行,并使用未被激活的碱或碱土金属硼氢化物,该发明促进了从氨基酸及其衍生物中以简单的“单一容器”过程高产率地制备相应醇的生产,并且保留给定的手性中心。应用:合成组分、制备光学活性化合物、拆分消旋化合物。