申请人:Senju Pharmaceutical Co., Ltd.
公开号:EP0827967A1
公开(公告)日:1998-03-11
An improved method for isolating and purifying a glutathione derivative is disclosed. More particularly, the invention provides a method for isolating and purifying S-(1, 2-dicarboxyethyl)glutathione or its pharmacologically acceptable salt from a reaction mixture available upon reacting glutathione or its salt with either fumaric acid or its salt or maleic acid or its salt, which comprises a first step of converting the S-(1, 2-dicarboxyethyl)glutathione or salt thereof in the reaction mixture to the corresponding copper salt, dissolving the copper salt in an aqueous solution of acetic acid, formic acid or propionic acid, and removing the contaminant glutathione, oxidized glutathione and fumaric acid copper salts with the aid of activated carbon and a second step of dissolving or suspending the isolated S-(1, 2-dicarboxyethyl)glutathione copper salt in water and blowing hydrogen sulfide gas through the resulting aqueous solution or suspension to remove copper.
本发明公开了一种分离和纯化谷胱甘肽衍生物的改进方法。更具体地说,本发明提供了一种从谷胱甘肽或其盐与富马酸或其盐或马来酸或其盐反应后得到的反应混合物中分离和纯化 S-(1,2-二羧乙基)谷胱甘肽或其药理学上可接受的盐的方法,该方法包括第一步,将反应混合物中的 S-(1,2-二羧乙基)谷胱甘肽或其盐转化为相应的铜盐、将铜盐溶解在乙酸、甲酸或丙酸的水溶液中,并借助活性炭除去污染物谷胱甘肽、氧化谷胱甘肽和富马酸铜盐;第二步是将分离出的 S-(1,2-二羧乙基)谷胱甘肽铜盐溶解或悬浮在水中,并将硫化氢气体吹入生成的水溶液或悬浮液中以除去铜。