第 39 卷第 1 期Vol. 39 No. 1
2009 年 2 月Feb 2009

所属栏目:医药及中间体

恩他卡朋的合成改进
史海波,秦永华,余卫国 (浙江医药高等专科学校,浙江 宁波 315100)
摘 要:以3,4-二羟基-5-硝基苯甲醛(3)和N,N-二乙基氰乙酰胺(5)为中间体,在哌啶和Ando催化剂的异丙醇体系中经knoevenagal反应合成得到了恩他卡朋(6)。中间体3 的制备由香兰素经常温硝化、脱甲基制得。中间体5 的制备由氰基乙酸在二环己基碳二亚胺(DCC)作用下经酰胺化一步制得,条件温和,收率较高,避免使用剧毒的氰化钠。总收率从文献的30%提高到67%。合成的恩他卡朋结构经核磁与质谱分析确证。
关键词:恩他卡朋;合成;knoevenagal反应;抗帕金森药物
中图分类号:TQ460.6  文献标识码:A  文章编号:1009-9212(2009)01- 0044-03
Improvements on the Synthesis of Entacapone
SHI Hai-bo,QIN Yong-hua,YU Wei-guo (Zhejiang Pharmaceutical College,Ningbo 315100,China)
Abstract:Entacapone was synthesized via Knoevenagal reaction of N,N-diethyl-2-nitrilo-acetamide(5)with 3,4-dihydroxy-5-nitro-benzaldehyde(3)in solvent of isopropanol containing piperidine and ando-catalyst. 3 was obtained from vanillin by nitration and demethylation. 5 was synthesized from cyanoacetic acid and diethylamine via DCC coupling under mild conditions. The overall yield was improved from 30% to 67%. The structure of entacapone was confirmed by 1H NMR and MS.
Key words:entacapone;synthesis;knoevenagal reaction;anti-parkinson's agent
作者简介:史海波(1976-),男,浙江宁波人,讲师,硕士,从事药物及中间体合成研究。(E-mail:nbblconba_shb@sohu.com)
收稿日期: 2009-02-1