申请人:Amino Yusuke
公开号:US20070191464A1
公开(公告)日:2007-08-16
[Problems] To provide a process for producing monatin where steric configuration of 2-position is in an R configuration or a salt thereof by isomerization of 2-position of monatin where steric configuration of 2-position is in an S configuration. [Means for Resolution] A process for producing monatin where steric configuration of 2-position is in an R configuration or a salt thereof, characterized in that, the process contains a step where isomerization reaction of 2-position of monatin in which steric configuration of 2-position is in an S configuration is carried out in a mixed solvent of water and organic solvent in the presence of an aldehyde and, after that, a step where monatin in which steric configuration of 2-position is in an R configuration or a salt is crystallized.
[问题] 提供一种制备2位立体构型为R构型或其盐的莫纳丁的方法,通过对2位立体构型为S构型的莫纳丁的2位异构化反应来实现。
[解决方法] 一种制备2位立体构型为R构型或其盐的莫纳丁的方法,其特征在于,该方法包含以下步骤:在醛的存在下,在水和有机溶剂混合溶剂中进行莫纳丁的2位异构化反应,在此之后,结晶化2位立体构型为R构型或其盐的莫纳丁。