METHOD FOR PURIFYING AMINOACETYLPYRROLIDINECARBONITRILE DERIVATIVE AND SALT THEREOF
申请人:Kyorin Pharmaceutical Co., Ltd.
公开号:EP2332908A1
公开(公告)日:2011-06-15
The present invention herein provides a simple, efficient and industrially useful method for purifying an aminoacetylpyrrolidinecarbonitrile derivative which is useful as a DPP-IV inhibitor. The method comprises the steps of acting an acid such as maleic acid on an aminoacetylpyrrolidinecarbonitrile derivative represented by the following Formula 1 to form a salt, isolating the salt and then regenerating the foregoing derivative from the salt:
(In the formula, A represents CH2, CHF or CF2; R represents a C1 to C6 alkyl group which may have a substitutent, a C3 to C8 cycloalkyl group which may have a substitutent, an arylmethyl group which may have a substitutent, an arylethyl group which may have a substitutent, an aromatic hydrocarbon ring which may have a substitutent, an aromatic hetero ring which may have a substitutent, or an aliphatic hetero ring which may have a substitutent; and n represents 1 or 2).
本发明在此提供一种简单、高效和工业上有用的方法,用于纯化可用作 DPP-IV 抑制剂的氨基乙酰基吡咯烷甲腈衍生物。该方法包括以下步骤:将酸如马来酸作用于下式 1 所代表的氨基乙酰基吡咯烷甲腈衍生物以形成盐,分离该盐,然后从该盐中再生出前述衍生物:
(式中,A 代表 CH2、CHF 或 CF2;R 代表可能有取代基的 C1 至 C6 烷基、可能有取代基的 C3 至 C8 环烷基、可能有取代基的芳基甲基、可能有取代基的芳 基乙基、可能有取代基的芳香烃环、可能有取代基的芳香杂环或可能有取代基的脂肪杂环;n 代表 1 或 2)。