申请人:Chen Xin
公开号:US20070015926A1
公开(公告)日:2007-01-18
The present invention discloses a method for preparing R-(+)-LA as well as its metal salts including sodium salt, potassium salt, calcium salt, magnesium salt, zinc salt, ferric salt, cooper salt , lithium salt and its organic salt, wherein a racemic Ethyl 6, 8-Dichlorooctanoic acid is employed as starting agents, followed by a hydrolysis and resolution processes to obtain (+)DCA, and then through sulfuration and cyclization process to obtain R-(+)-LA as well as its varied salts. A method for converting the (−)DCA to (+)DCA is also introduced.
本发明公开了一种制备R-(+)-LA以及其金属盐,包括钠盐、钾盐、钙盐、镁盐、锌盐、铁盐、铜盐、锂盐和其有机盐的方法。该方法使用外消旋乙基6,8-二氯辛酸作为起始剂,经过水解和分离过程得到(+)DCA,然后通过硫化和环化过程得到R-(+)-LA及其各种盐。还介绍了一种将(-)DCA转化为(+)DCA的方法。