申请人:MURAO Hiroshi
公开号:US20060135784A1
公开(公告)日:2006-06-22
The present invention provides a process for preparing 3-amino-2-hydroxypropionic acid derivatives (1) which does not use dangerous reagents, is economically advantageous, and is suitable for an industrial production, which process comprises: treating N-protected-3-amino-2-hydroxypropionic acid derivatives (2) having a steric configuration at 2-position carbon reverse to that of derivatives (1) with a leaving group-introducing agent to convert into N-protected-3-aminopropionic acid derivatives (3), then treating the derivatives with a basic substance to convert into substituted-3-amino-2-hydroxypropionic acid derivatives (4) having an inverted steric configuration at 2-position carbon,
and then converting the derivatives into 3-amino-2-hydroxypropionic acid derivatives (1).
本发明提供了一种制备3-氨基-2-羟基丙酸衍生物(1)的过程,该过程不使用危险试剂,经济优势明显,适用于工业生产。该过程包括:用离去基引入试剂处理在2位碳的立体构型与衍生物(1)相反的N-保护的3-氨基-2-羟基丙酸衍生物(2),转化为N-保护的3-氨基丙酸衍生物(3),然后用碱性物质处理衍生物,转化为在2位碳具有反向立体构型的取代3-氨基-2-羟基丙酸衍生物(4),最后将衍生物转化为3-氨基-2-羟基丙酸衍生物(1)。