PROCESS FOR PRODUCING 1-BENZYL-4-[(5,6-DIMETHOXY-1-INDANONE)-2-YLIDENE]METHYLPIPERIDINE
申请人:Eisai R&D Management Co., Ltd.
公开号:EP1911745A1
公开(公告)日:2008-04-16
It is intended to provide a process for producing 1-benzyl-4-[(5,6-dimethoxy-1-indanon)-2-ylidene]methylpiperidine represented by the structural formula (I): (I) which is useful as an intermediate material for a pharmaceutical or a solvate thereof in which impurity content is further reduced and operation is simple and suitable for industrial production by reacting 5,6-dimethoxy-1-indanone with 1-benzyl-4-formylpiperidine in a reaction solvent in the presence of a base and then gradually crystallizing a target substance in a reaction mixture in a high temperature region.
本发明旨在提供一种生产由结构式(I)代表的 1-苄基-4-[(5,6-二甲氧基-1-茚酮)-2-亚基]甲基哌啶的工艺:(I)是一种有用的药物中间体或其溶液,其中杂质含量进一步降低,操作简单,适于工业化生产,其方法是在碱存在下,在反应溶剂中使 5,6-二甲氧基-1-茚酮与 1-苄基-4-甲酰基哌啶反应,然后在高温区使反应混合物中的目标物质逐渐结晶。