第 45 卷第 4 期Vol. 45 No. 4
2015 年 8 月Aug 2015

所属栏目:医药及中间体

埃索美拉唑杂质B的合成
张 兰,徐慧兰,邓新山,刘聪翀,刘晓平,胡 春* (沈阳药科大学 基于靶点的药物设计与研究教育部重点实验室,沈阳 辽宁 110016)
摘 要:为了控制埃索美拉唑的纯度和质量,合成了埃索美拉唑杂质B。以2,3,5-三甲基吡啶为原料,经m-CPBA氧化后,在乙酸酐作用下重排,而后水解得2-羟甲基-3,5-二甲基吡啶,再经氯代得到2-氯甲基-3,5-二甲基吡啶盐酸盐,再与2-巯基-5-甲氧基苯并咪唑经亲核取代合成了5-甲氧基-2-[(3,5-二甲基-2-吡啶基)甲硫基]-1H-苯并咪唑,后经m-CPBA氧化得到埃索美拉唑杂质B。目标化合物的结构经IR、MS和1H NMR确证。该合成方法未见文献报道,具有原料易得、操作简单、反应温和、收率较高等优点。
关键词:埃索美拉唑;杂质;合成,2,3,5-三甲基吡啶
中图分类号:TQ463  文献标识码:A  文章编号:1009-9212(2015)04-0017-03
Synthesis of Impurity B of Esomeprazole
ZHANG Lan, XU Hui-lan, DENG Xin-shan, LIU Cong-chong, LIU Xiao-ping, HU Chun* (Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education; School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang 110016, China)
Abstract:In order to control the purity and quality of esomeprazole, the impurity B in esomeprazole product was synthesized. Firstly, 2-(chloromethyl)-3,5-dimethylpyridine hydrochloride was prepared through reactions including oxidation, rearrangement, hydrolysis and chlorination using 2,3,5-trimethylpyridine as the starting material. Then, 5-methoxy-2-[(3,5-dimethyl-2-pyridyl)methylthio]-1H-benzimidazole was prepared through nucleophilic substitution between 2-(chloromethyl)-3,5-dimethylpyridine hydrochloride and 2-mercapto-5-methoxybenzimidazole. The impurity B was prepared by the oxidation of m-CPBA with 5-methoxy-2-[(3,5-dimethyl-2-pyridyl)methylthio]-1H-benzimidazole and characterized by IR, MS and 1H NMR spectra. The synthetic route has many advantages including commercialized raw materials, simple manipulation, mild reaction conditions, and high yields.
Key words:esomeprazole; impurity; synthesis 2,3,5-trimethylpyridine
基金项目:国家“重大新药创制”科技重大专项(2009ZX09301-012)。
作者简介:张 兰(1989-),女,甘肃华池人,博士研究生,研究方向:新药设计与合成(E-mail:zhanglan8917@sina.com)。
联 系 人: 胡 春,教授,研究方向:新药设计与合成(E-mail:chunhu@sypbu.edu.cn)。
收稿日期: 2014-05-2