PREPARATION METHOD OF HIGH-OPTICAL PURITY N2-[1-(S)-ETHOXYCARBONYL-3-PHENYLPROPYL]-N6-TRIFLUOROACETYL-L-LYSINE
申请人:Que Limin
公开号:US20130178651A1
公开(公告)日:2013-07-11
Disclosed is a preparation method of high-optical purity N2-[1-(S)-ethoxycarbonyl-3-phenylpropyl]-N6-trifluoroacetyl-L-lysine. The method includes: adding crude N2-[1-(S)-ethoxycarbonyl-3-phenylpropyl]-N6-trifluoroacetyl-L-lysine to one or more organic solvents, and then reacting with an organic acid to form a salt, which is precipitated, thereby achieving the purpose of separation and purification; next, adding the obtained solid or mother concentrate into deionized water, and then adding an inorganic base or an organic base for basification, so as to adjust the pH value, removing the organic acid, filtering, washing and drying, to obtain the high-optical purity N2-[1-(S)-ethoxycarbonyl-3-phenylpropyl]-N6-trifluoroacetyl-L-lysine, where the molar ratio of 1S-isomer to 1R-isomer is equal to or greater than 99:1.
本发明公开了一种高光学纯度N2-[1-(S)-乙氧羰基-3-苯基丙基]-N6-三氟乙酰-L-赖氨酸的制备方法。该方法包括:将粗N2-[1-(S)-乙氧羰基-3-苯基丙基]-N6-三氟乙酰-L-赖氨酸加入一个或多个有机溶剂中,然后与有机酸反应形成盐,沉淀,从而达到分离和纯化的目的;接下来,将获得的固体或母液加入去离子水中,然后加入无机碱或有机碱进行碱化,以调节pH值,去除有机酸,过滤,洗涤和干燥,以获得高光学纯度N2-[1-(S)-乙氧羰基-3-苯基丙基]-N6-三氟乙酰-L-赖氨酸,其中1S-异构体与1R-异构体的摩尔比为99:1或更大。