CN113861047B - 一种2-(2-甲氧基苯氧基)乙胺的合成方法 - Google Patents

一种2-(2-甲氧基苯氧基)乙胺的合成方法 Download PDF

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CN113861047B
CN113861047B CN202111097135.0A CN202111097135A CN113861047B CN 113861047 B CN113861047 B CN 113861047B CN 202111097135 A CN202111097135 A CN 202111097135A CN 113861047 B CN113861047 B CN 113861047B
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methoxyphenoxy
ethylamine
synthesis method
guaiacol
ethanolamine
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CN113861047A (zh
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陈正树
田湘寅
王鹏
刘国杰
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Hangzhou Guorui Biotechnology Co ltd
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    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C213/00Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton
    • C07C213/06Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton from hydroxy amines by reactions involving the etherification or esterification of hydroxy groups
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C217/00Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton
    • C07C217/02Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having etherified hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton
    • C07C217/04Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having etherified hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated
    • C07C217/06Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having etherified hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one etherified hydroxy group and one amino group bound to the carbon skeleton, which is not further substituted
    • C07C217/14Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having etherified hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one etherified hydroxy group and one amino group bound to the carbon skeleton, which is not further substituted the oxygen atom of the etherified hydroxy group being further bound to a carbon atom of a six-membered aromatic ring
    • C07C217/18Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having etherified hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one etherified hydroxy group and one amino group bound to the carbon skeleton, which is not further substituted the oxygen atom of the etherified hydroxy group being further bound to a carbon atom of a six-membered aromatic ring the six-membered aromatic ring or condensed ring system containing that ring being further substituted
    • C07C217/20Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having etherified hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one etherified hydroxy group and one amino group bound to the carbon skeleton, which is not further substituted the oxygen atom of the etherified hydroxy group being further bound to a carbon atom of a six-membered aromatic ring the six-membered aromatic ring or condensed ring system containing that ring being further substituted by halogen atoms, by trihalomethyl, nitro or nitroso groups, or by singly-bound oxygen atoms

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Abstract

本发明提供了一种2‑(2‑甲氧基苯氧基)乙胺的合成方法,属于有机合成技术领域。本发明以愈创木酚、尿素和乙醇胺为起始原料,通过“一锅法”完成三步反应合成2‑(2‑甲氧基苯氧基)乙胺。提供了一种全新的2‑(2‑甲氧基苯氧基)乙胺合成思路,创新地避免直接使用价格昂贵的2‑恶唑烷酮,利用尿素和乙醇胺合成2‑恶唑烷酮,再以碱的催化下直接与愈创木酚反应生成2‑(2‑甲氧基苯氧基)乙胺。

Description

一种2-(2-甲氧基苯氧基)乙胺的合成方法
技术领域
本发明属于有机合成技术领域,具体涉及一种2-(2-甲氧基苯氧基)乙胺的合成方法。
背景技术
2-(2-甲氧基苯氧基)乙胺是合成β-受体阻断剂卡维地洛的一个重要中间体,卡维地洛是一种治疗原发性高血压的药,可单独使用或与其它抗高血压药特别是噻嗪类利尿剂联合使用,卡维地洛也可用于治疗有症状的充血性心力衰竭可降低死亡率和心血管事件的住院率,改善病人一般情况并减慢疾病进展。现有技术中针对2-(2-甲氧基苯氧基)乙胺的合成方法具有多种,但是存在收率低、成本高的情况。
例如,专利WO2009128088A2公开了2-(2-甲氧基苯氧基)乙胺的制备方法,首先愈创木酚和1,2-二氯乙烷反应得到1-(2-氯乙氧基)-2-甲氧基苯,再通过Gabriel反应获得2-(2-甲氧基苯氧基)乙胺。该合成线路较长,三步总收率不到43%,使用邻苯二甲酰亚胺钾价格高,生产成本较高。
再如,专利CN109206328A公开了一种合成路线:以愈创木酚为起始原料合成2-(2-甲氧基苯氧基)乙醇,经氯代合成2-(2-甲氧基苯氧基)氯乙烷,然后与邻苯二甲酰亚胺钾盐反应得到N-(邻甲氧基苯氧乙基)-邻苯二甲酰亚胺,最后经碱水解得到2-(2-甲氧基苯氧基)乙胺。该路线较长,操作繁琐,使用二氯亚砜试剂容易腐蚀反应设备,不利于工业化生产。
综上,现有合成2-(2-甲氧基苯氧基)乙胺的方法还存在反应路线长、操作繁琐、反应试剂价格昂贵、工艺条件苛刻,不利于工业化的缺点,并且生产成本高。
发明内容
基于现有技术中存在的缺陷和不足,本发明提供了一种2-(2-甲氧基苯氧基)乙胺的合成方法,具有原料廉价、路线短、收率高和反应操作简单的优势。
为实现上述目的,本发明提供的一种2-(2-甲氧基苯氧基)乙胺的合成方法,包括以下步骤:
将愈创木酚、尿素、乙醇胺和氢氧化钾加入反应容器中,加热后保温,加乙二胺,保温后冷却,溶解、洗涤、萃取后浓缩得棕黑色液体,即为2-(2-甲氧基苯氧基)乙胺。
所述的反应的反应方程式为:
其中,所述的愈创木酚、尿素、乙醇胺和氢氧化钾的摩尔比为1:1-2:1-2:0.05-0.5。
优选地,所述的愈创木酚、尿素、乙醇胺和氢氧化钾的摩尔比为1:1.6:1.6:0.1。
所述的加热保温温度为170℃,升温速度为每小时升温10℃。
所述的乙二胺加入量为愈创木酚摩尔量的50%;
第一次保温的时间为6-20h;优选为6h、15h或20h。
第二次保温的时间为2h。
上述反应可在有溶剂或无溶剂的条件下进行,所述溶剂为均三甲苯或N-甲基吡咯烷酮。
现有技术相比,本发明的有益效果:
本发明以愈创木酚、尿素和乙醇胺为起始原料,通过“一锅法”完成三步反应合成2-(2-甲氧基苯氧基)乙胺。提供了一种全新的2-(2-甲氧基苯氧基)乙胺合成思路,创新地避免直接使用价格昂贵的2-恶唑烷酮,利用尿素和乙醇胺合成2-恶唑烷酮,再以碱的催化下直接与愈创木酚反应生成2-(2-甲氧基苯氧基)乙胺。
附图说明
图1为本发明实施例制备的2-(2-甲氧基苯氧基)乙胺核磁图谱;
具体实施方式
本发明中提到的上述特征,或实施例提到的特征可以任意组合。本案说明书所解释的所有特征可与任意方法形式并用,说明书中揭示的各个特征,可被任何可提供相同、均等或相似目的的取代性特征取代。因此除有特殊说明,所揭示的特征仅为均等或相似特征的一般性例子。
下面结合具体实施例,进一步阐述本发明。这些实施例仅用于说明本发明而不用于限制本发明的范围。下列实施例中为注明具体条件的实施方法,通常按照常规条件或按照制造厂商所建议的条件。除非特殊说明,否则所有的百分比和分数按重量计。
除非另行定义,文中所使用的所有专业与科学用语与本领域技术人员所熟知的意义相同。此外,任何与所记载内容相似或均等的方法及材料皆可应用于本发明方法中。文中所述的优选实施方法与材料仅做示范作用。
实施例1
2-(2-甲氧基苯氧基)乙胺的制备:
向250ml单口瓶中加入愈创木酚(12.41g,0.1mol),尿素(9.60g,0.16mol),乙醇胺(9.76g,0.16mol)和氢氧化钾(2.80g,0.05mol),120℃加热,程序升温至170℃(每半小时升温10℃),保温6h,加乙二胺(3.00g,0.05mol),在170℃条件下继续加热2h,冷却后向反应产物加50ml水溶解,浓盐酸调pH=2,过滤,水层加50ml氯仿洗涤一次,20%氢氧化钠溶液调pH=13,加50ml氯仿萃取,减压蒸出氯仿,得棕黑色液体11.4g,GC检测纯度52.9%,收率36.1%。
实施例2
2-(2-甲氧基苯氧基)乙胺的制备:
向250ml单口瓶中加入愈创木酚(12.41g,0.1mol),尿素(9.60g,0.16mol),乙醇胺(9.76g,0.16mol),氢氧化钾(0.56g,0.01mol),加50ml均三甲苯溶解,120℃加热,程序升温至170℃(每小时升温10℃),保温15小时,加乙二胺(3.00g,0.05mol),170℃加热2h,冷却后向反应产物加50ml水溶解,浓盐酸调pH=2,过滤,水层加50ml氯仿洗涤一次,20%氢氧化钠溶液调pH=13,加50ml氯仿萃取,减压蒸出氯仿,得棕黑色液体12.7g,纯度97.0%,收率73.4%。
实施例3
2-(2-甲氧基苯氧基)乙胺的制备:
向250ml单口瓶中加入30ml均三甲苯,愈创木酚(12.41g,0.1mol),尿素(9.60g,0.16mol),乙醇胺(9.76g,0.16mol)和氢氧化钾(0.56g,0.01mol),120℃加热,程序升温至170℃(每半小时升温10℃),保温20h,加乙二胺(3.00g,0.05mol),170℃加热2h,冷却后向反应产物加50ml水溶解,浓盐酸调pH=2,过滤,水层加50ml氯仿洗涤一次,20%氢氧化钠溶液调pH=13,加50ml氯仿萃取,减压蒸出氯仿,得棕黑色液体11.6g,GC检测纯度87.3%,收率60.1%。

Claims (7)

1.一种2-( 2-甲氧基苯氧基)乙胺的合成方法,其特征在于:包括以下步骤:
将愈创木酚、尿素、乙醇胺和氢氧化钾加入反应容器中,加热后第一次保温,加乙二胺,第二次保温后冷却,溶解、洗涤、萃取后浓缩得棕黑色液体,即为2-( 2-甲氧基苯氧基)乙胺;反应在有溶剂的条件下进行,所述溶剂为均三甲苯;所述的愈创木酚、尿素、乙醇胺和氢氧化钾的摩尔比为1:1-2:1-2:0.05-0.5;所述第一次保温的时间为6-20h。
2.根据权利要求1所述的合成方法,其特征在于:所述的愈创木酚、尿素、乙醇胺和氢氧化钾的摩尔比为1:1.6:1.6:0.1。
3.根据权利要求1所述的合成方法,其特征在于:所述的加热保温的温度为170℃。
4.根据权利要求1所述的合成方法,其特征在于:所述的加热保温的升温速度为每小时升温10℃。
5.根据权利要求1所述的合成方法,其特征在于:所述的乙二胺加入量为愈创木酚摩尔量的50%。
6.根据权利要求1所述的合成方法,其特征在于:第一次保温的时间6h、15h或20h。
7.根据权利要求1所述的合成方法,其特征在于:第二次保温的时间为2h。
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