第 39 卷第 1 期 |  | Vol. 39 No. 1 | 2009 年 2 月 | Feb 2009 |
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所屬欄目:醫藥及中間體
恩他卡朋的合成改進(jìn) |
史海波,秦永華,余衛國
(浙江醫藥高等專(zhuān)科學(xué)校,浙江 寧波 315100) |
摘 要:以3,4-二羥基-5-硝基苯甲醛(3)和N,N-二乙基氰乙酰胺(5)為中間體,在哌啶和Ando催化劑的異丙醇體系中經(jīng)knoevenagal反應合成得到了恩他卡朋(6)。中間體3 的制備由香蘭素經(jīng)常溫硝化、脫甲基制得。中間體5 的制備由氰基乙酸在二環(huán)己基碳二亞胺(DCC)作用下經(jīng)酰胺化一步制得,條件溫和,收率較高,避免使用劇毒的氰化鈉?偸章蕪奈墨I的30%提高到67%。合成的恩他卡朋結構經(jīng)核磁與質(zhì)譜分析確證。 |
關(guān)鍵詞:恩他卡朋;合成;knoevenagal反應;抗帕金森藥物 |
中圖分類(lèi)號:TQ460.6 文獻標識碼:A 文章編號:1009-9212(2009)01- 0044-03 |
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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 |
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作者簡(jiǎn)介:史海波(1976-),男,浙江寧波人,講師,碩士,從事藥物及中間體合成研究。(E-mail:nbblconba_shb@sohu.com)
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收稿日期: 2009-02-1
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