第 46 卷第 3 期Vol. 46 No. 3
2016 年 6 月Jun 2016

所属栏目:医药及中间体

5,6,7,8-四氢咪唑并[1,2-a]吡啶-3-硼酸盐酸盐的合成
潘 琪,王 凯,周 文,刘 博* (广州中医药大学第二临床医学院 广东省中医药科学院,广东 广州 510006)
摘 要:以5-氯戊腈为原料,先经2,2-二甲氧基乙胺取代,甲酸环化成咪唑环、碘化钠关环,合成5,6,7,8,-四氢咪唑并[1,2-a]吡啶,再与硼酸三异丙酯,在正丁基锂作用下进行硼酸化,制得鲜见文献报道的目标化合物5,6,7,8-四氢咪唑并[1,2-a]吡啶-3-硼酸盐酸盐,5步反应总收率31.85%。产品经MS和1H NMR 确证。该合成工艺具有反应条件温和、操作简单的优点。
关键词:5-氯戊腈;咪唑并[1,2-a]吡啶;硼酸
中图分类号:TQ252.3  文献标识码:A  文章编号:1009-9212(2016)03-0020-04
Synthesis of 5,6,7,8-Tetrahydroimidazo[1,2-a]pyridin-3-yl Boronic Acid Hydrochloride
PAN Qi, WANG Kai, ZHOU Wen, LIU Bo* (Guangdong Provincial Academy of Chinese Medical Sciences/The Second Clinical Medical College of Guangzhou University of Chinese Medicine, Guangzhou 510006, China)
Abstract:5,6,7,8-Tetrahydroimidazo[1,2-a]pyridin-3-yl boronic acid hydrochloride, the titled compound, which has been rarely reported in literatures, was prepared from the intermediate compound 5,6,7,8-tetrahydroimidazo[1,2-a] pyridin with n-butyllithium and tripropylborate. The intermediate was prepared from 5-chloropentanenitrile via substitution with 2,2-dimethoxyethanamine, cyclization with formic acid, and cyclization with sodium iodide. The target compound was achieved in overall yield of 31.85% and confirmed with MS and 1H NMR. This route has the advantages of mild reaction conditions and simple procedures.
Key words:5-chloropentanenitrile; imidazo [1,2-a] pyridin; boronic acid
基金项目: 国家自然科学基金青年基金(81202398),广东省科技计划项目(2013B010102006,2015A020211025),广东省中医药科学院中医药转化医学研究专项(YN2014ZHR209,YN2015MS03),广东省科学技术厅—广东省中医药科学院联合科研项目(2014A020221035)。
作者简介: 潘 琪(1988-),女,广西桂林人,硕士研究生,从事中药活性物质化学研究与结构优化(E-mail:408867717@qq.com)。
联 系 人:刘 博,研究员(E-mail:doctliu@gzucm.edu.cn ;E-mail:doctliu@263.net)
收稿日期: 2016-06-0