CN107011256A - 一种5‑碘‑4‑甲氧基‑2‑氨基吡啶的合成方法 - Google Patents

一种5‑碘‑4‑甲氧基‑2‑氨基吡啶的合成方法 Download PDF

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CN107011256A
CN107011256A CN201710433506.5A CN201710433506A CN107011256A CN 107011256 A CN107011256 A CN 107011256A CN 201710433506 A CN201710433506 A CN 201710433506A CN 107011256 A CN107011256 A CN 107011256A
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amino
methoxyl
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徐红岩
马敬祥
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Kang (shanghai) New Medicine Research & Development Co Ltd
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    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D213/00Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/72Nitrogen atoms
    • C07D213/73Unsubstituted amino or imino radicals

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  • Organic Chemistry (AREA)
  • Pyridine Compounds (AREA)

Abstract

本发明提供一种5‑碘‑4‑甲氧基‑2‑氨基吡啶的合成方法,以2‑氨基‑4‑甲氧基吡啶为起始原料,采用N‑碘代丁二酰亚胺作为碘化试剂进行反应,反应结束后经后处理、纯化后得到所述5‑碘‑4‑甲氧基‑2‑氨基吡啶。本发明和现有技术相比,反应条件温和,合成路线简单,反应时间短,成本低。

Description

一种5-碘-4-甲氧基-2-氨基吡啶的合成方法
技术领域
本发明涉及的是一种5-碘-4-甲氧基-2-氨基吡啶的合成方法。
背景技术
5-碘-4-甲氧基-2-氨基吡啶作为医药中间体得到广泛应用。2013年,PhillipP.Sharp等首次在Organic Letters杂志上报道了以2-氨基-4-甲氧基吡啶为原料,和碘、三氟甲烷磺酸银反应,利用微波技术的合成方法。但是该方法需要微波反应装置,并且存在反应温度高,反应时间长,需要的试剂较为昂贵以及需要的试剂量大等缺点。
迄今为止,关于利用N-碘代丁二酰亚胺作为碘化试剂的合成方法未见公开报道。
发明内容
本发明的目的是提供一种5-碘-4-甲氧基-2-氨基吡啶的合成方法,以简化其合成工艺,并降低生产成本。
本发明是通过如下技术方案实现的:
一种5-碘-4-甲氧基-2-氨基吡啶的合成方法,以2-氨基-4-甲氧基吡啶为起始原料,采用N-碘代丁二酰亚胺作为碘化试剂进行反应,反应结束后经后处理、纯化后得到所述5-碘-4-甲氧基-2-氨基吡啶。
进一步的,所述5-碘-4-甲氧基-2-氨基吡啶的合成方法,包括如下步骤:0-50℃下,2-氨基-4-甲氧基吡啶在极性溶剂中和N-碘代丁二酰亚胺反应,反应结束后用水稀释,过滤得到粗产物,经过色谱柱纯化后,得到所述5-碘-4-甲氧基-2-氨基吡啶。
本发明的合成线路如下所示:
优选的,所述极性溶剂为N,N-二甲基甲酰胺。
上述反应温度优选20-30℃,最好是25℃。
2-氨基-4-甲氧基吡啶在N,N-二甲基甲酰胺中和N-碘代丁二酰亚胺反应时间为30-90分钟,优选反应时间为50-70分钟,最好是60分钟。
所述色谱柱优选采用硅胶色谱柱。
本发明的有益效果是:和现有技术相比,本发明反应条件温和,合成路线简单,反应时间短,成本低。
具体实施方式
下面给出本发明较佳实施例,以详细说明本发明的技术方案。根据下面说明和权利要求书,本发明的优点和特征将更清楚。
实施例1
向三口烧瓶中加入2-氨基-4-甲氧基吡啶(7.8g,62.9mmol),N,N-二甲基甲酰胺(150mL);在25℃加入N-碘代丁二酰亚胺(14.1g,62.7mmol)。反应液25℃搅拌60分钟。反应液用水(400mL)稀释,过滤得到固体粗产物,经过硅胶柱色谱分离(二氯甲烷:甲醇=20:1),得到棕色固体,即目标产物5-碘-4-甲氧基-2-氨基吡啶(7.24g,28.9mmol,46%)。经核磁共振测定结果如下:1H NMR(400MHz,CDCl3):8.16(s,1H),5.98(s,1H),4.44(br,2H),3.86(s,3H)ppm.液相色谱-质谱联用检测结果如下:LC-MS(ESI):m/z 250.90[M+H]+
实施例2
步骤1:2-氨基-4-甲氧基吡啶在N,N-二甲基甲酰胺中和N-碘代丁二酰亚胺反应时间为30分钟,反应温度为50℃,反应液用水(400mL)稀释,过滤得到固体粗产物,经过硅胶柱色谱分离(二氯甲烷:甲醇=20:1),得到棕色固体,即目标产物5-碘-4-甲氧基-2-氨基吡啶(收率45.2%)。经核磁共振测定结果如下:1H NMR(400MHz,CDCl3):8.16(s,1H),5.98(s,1H),4.44(br,2H),3.86(s,3H)ppm.液相色谱-质谱联用检测结果如下:LC-MS(ESI):m/z250.90[M+H]+
实施例3
步骤1:2-氨基-4-甲氧基吡啶在N,N-二甲基甲酰胺中和N-碘代丁二酰亚胺反应时间为90分钟,反应温度为0℃,反应液用水(400mL)稀释,过滤得到固体粗产物,经过硅胶柱色谱分离(二氯甲烷:甲醇=20:1),得到棕色固体,即目标产物5-碘-4-甲氧基-2-氨基吡啶(收率45.5%)。经核磁共振测定结果如下:1H NMR(400MHz,CDCl3):8.16(s,1H),5.98(s,1H),4.44(br,2H),3.86(s,3H)ppm.液相色谱-质谱联用检测结果如下:LC-MS(ESI):m/z250.90[M+H]+
上述描述仅是对本发明较佳实施例的描述,并非对本发明范围的任何限定,本发明领域的普通技术人员根据上述揭示内容做的任何变更、修饰,均属于权利要求书的保护范围。

Claims (9)

1.一种5-碘-4-甲氧基-2-氨基吡啶的合成方法,其特征在于,以2-氨基-4-甲氧基吡啶为起始原料,采用N-碘代丁二酰亚胺作为碘化试剂进行反应,反应结束后经后处理、纯化后得到所述5-碘-4-甲氧基-2-氨基吡啶。
2.如权利要求1所述的方法,其特征在于,包括如下步骤:0-50℃下,2-氨基-4-甲氧基吡啶在极性溶剂中和N-碘代丁二酰亚胺反应,反应结束后用水稀释,过滤得到粗产物,经过色谱柱纯化后,得到所述5-碘-4-甲氧基-2-氨基吡啶。
3.如权利要求2所述的方法,其特征在于,所述极性溶剂为N,N-二甲基甲酰胺。
4.如权利要求1所述的方法,其特征在于,2-氨基-4-甲氧基吡啶在N,N-二甲基甲酰胺中和N-碘代丁二酰亚胺反应温度为20-30℃。
5.如权利要求1所述的方法,其特征在于,所述反应温度为25℃。
6.如权利要求1所述的方法,其特征在于,2-氨基-4-甲氧基吡啶在N,N-二甲基甲酰胺中和N-碘代丁二酰亚胺反应时间为30-90分钟。
7.如权利要求1所述的方法,其特征在于,所述反应时间为50-70分钟。
8.如权利要求1所述的方法,其特征在于,所述反应时间为60分钟。
9.如权利要求1所述的方法,其特征在于,所述色谱柱为硅胶柱。
CN201710433506.5A 2017-06-09 2017-06-09 一种5‑碘‑4‑甲氧基‑2‑氨基吡啶的合成方法 Withdrawn CN107011256A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109232562A (zh) * 2018-10-24 2019-01-18 康化(上海)新药研发有限公司 一种7-氮杂吲哚-5-氯-6-羧酸的合成方法

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US20120015926A1 (en) * 2008-11-10 2012-01-19 Ling Tong Compounds for the treatment of inflammatory disorders

Patent Citations (1)

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US20120015926A1 (en) * 2008-11-10 2012-01-19 Ling Tong Compounds for the treatment of inflammatory disorders

Non-Patent Citations (1)

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Title
PIERRE L. BEAULIEU,ET AL: "Aza follow-ups to BI207524, a thumb pocket 1 HCV NS5B polymerase inhibitor. Part1: Mitigating the genotoxic liability of an aniline metabolite", 《BIOORGANIC MEDICINAL CHEMISTRY LETTERS》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109232562A (zh) * 2018-10-24 2019-01-18 康化(上海)新药研发有限公司 一种7-氮杂吲哚-5-氯-6-羧酸的合成方法

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Application publication date: 20170804