METHOD FOR PRODUCING OPTICALLY ACTIVE 2-HYDROXY ESTER AND NOVEL INTERMEDIATE COMPOUND
    10.
    发明公开
    METHOD FOR PRODUCING OPTICALLY ACTIVE 2-HYDROXY ESTER AND NOVEL INTERMEDIATE COMPOUND 有权
    VERFAHREN ZUR HERSTELLUNG EINES OPTISCH AKTIVEN 2-HYDROXYESTERS UND NEWES ZWISCHENPRODUKT

    公开(公告)号:EP2407447A4

    公开(公告)日:2015-09-16

    申请号:EP10750787

    申请日:2010-03-08

    Abstract: Disclosed is a method for producing an optically active 2-hydroxy ester, comprising selectively esterifying one enantiomer of a racemic 2-hydroxy ester in a solvent containing a catalyst such as tetramisole or benzotetramisole, and a carboxylic acid anhydride, or a carboxylic acid anhydride and a carboxylic acid. In particular, in the case where the solvent contains a carboxylic acid anhydride, but does not contain a carboxylic acid, as the carboxylic acid anhydride, a carboxylic acid anhydride containing a tertiary or quaternary carbon atom in the a-position is used. On the other hand, in the case where the solvent contains a carboxylic acid anhydride and a carboxylic acid, as the carboxylic acid, a carboxylic acid containing a tertiary or quaternary carbon atom in the ±-position is used.

    Abstract translation: 公开了一种光学活性2-羟基酯的制备方法,该方法包括选择性地酯化含有催化剂如四异丙醇或苯并四唑的溶剂中的外消旋2-羟基酯的一种对映异构体,以及羧酸酐或羧酸酐, 羧酸。 特别是,在溶剂含有羧酸酐但不含羧酸的情况下,作为羧酸酐,使用在a位含有叔或季碳原子的羧酸酐。 另一方面,在溶剂含有羧酸酐和羧酸的情况下,作为羧酸,使用在±位中含有叔或季碳原子的羧酸。

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