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    • 2. 发明申请
    • PROCESS FOR REDUCING AMINO ACIDS AND DERIVATIVES THEREOF
    • 一种用于减少氨基及其衍生物
    • WO1996007634A1
    • 1996-03-14
    • PCT/EP1995003281
    • 1995-08-17
    • DEGUSSA AKTIENGESELLSCHAFTF. HOFFMANN-LA ROCHE AGKOTTENHAHN, MatthiasDRAUZ, KarlheinzHILPERT, Hans
    • DEGUSSA AKTIENGESELLSCHAFTF. HOFFMANN-LA ROCHE AG
    • C07C213/00
    • C07D263/20C07C213/00C07C215/08C07C215/10C07C215/28
    • A process is disclosed for reducing amino acids and derivatives thereof. Compounds of formula (I), in which n = 0 or 1 and R , R , R , R , R and R 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 corresponding 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.
    • 式(I),其中n = 0或1的化合物,且R <1>,R <2>,R <3>,R <4>,R <5>和R <6>如说明书中所定义 的含义,被还原成通式(II)的相应的氨基醇,式(I)的化合物中的至少一种醇的第一步先进行反应,同时加入酸并加热以形成酯,使 含酯反应混合物,将得到的酯与碱金属或Erdalkaliborhydrid到(II)的化合物的第二步骤中反应。 因为根据本发明,而不酯的隔离所述第二步骤从反应混合物中进行,并且碱金属或Erdalkaliborhydride使用哪个没有被激活,这是可能的,从氨基酸或氨基酸衍生物,在高一个简单的“一个锅煮”的方式相应的醇 准备给如有必要,手性存在的产量。 合成单元,显示光学活性化合物; 分辨率。