CN106349093B - 一种二羧甲基丙氨酸及其合成方法 - Google Patents

一种二羧甲基丙氨酸及其合成方法 Download PDF

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CN106349093B
CN106349093B CN201610721765.3A CN201610721765A CN106349093B CN 106349093 B CN106349093 B CN 106349093B CN 201610721765 A CN201610721765 A CN 201610721765A CN 106349093 B CN106349093 B CN 106349093B
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dicarboxyl
dicarboxyl methylalanine
methylalanine
hybrid reaction
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CN106349093A (zh
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冯树海
李峰
耿洪军
宋晓峰
李维纳
李文远
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WEIFANG DAYOU BIOLOGICAL CHEMICAL CO LTD
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    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C227/00Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton
    • C07C227/14Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton from compounds containing already amino and carboxyl groups or derivatives thereof
    • C07C227/18Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton from compounds containing already amino and carboxyl groups or derivatives thereof by reactions involving amino or carboxyl groups, e.g. hydrolysis of esters or amides, by formation of halides, salts or esters
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C229/00Compounds containing amino and carboxyl groups bound to the same carbon skeleton
    • C07C229/02Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton
    • C07C229/04Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated
    • C07C229/06Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one amino and one carboxyl group bound to the carbon skeleton
    • C07C229/10Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one amino and one carboxyl group bound to the carbon skeleton the nitrogen atom of the amino group being further bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings
    • C07C229/16Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one amino and one carboxyl group bound to the carbon skeleton the nitrogen atom of the amino group being further bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings to carbon atoms of hydrocarbon radicals substituted by amino or carboxyl groups, e.g. ethylenediamine-tetra-acetic acid, iminodiacetic acids

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  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

本发明提供一种二羧甲基丙氨酸,所述二羧甲基丙氨酸,结构式如下:

Description

一种二羧甲基丙氨酸及其合成方法
技术领域
本发明涉及有机化学领域,具体涉及一种二羧甲基丙氨酸及其合成方法。
背景技术
二羧甲基丙氨酸(MGDA)是巴斯夫公司开发的新一代可生物降解的鳌合剂,在没有细菌的情况下,可自行降解68%以上;在标准状态下14天可降解89-100%。与其它新型鳌合剂比,MGDA能在广泛的PH范围内(2~13.5)和高温条件下,与金属离子形成稳定的络合物,且不形成沉淀。超强的络合作用,良好的安全特性,能够生物降解,对环境友好。使得国内外专家一致认为,MGDA在洗涤、日用、造纸、印染等行业被认为是含磷鳌合物的最佳替代物,对于环境污染的源头控制,减轻环境压力具有重要的作用。
MGDA的生产国际上采用Strecker方法(US5817864、 US5849950、 CN101171226),虽有成本低的优点。但该方法存在几个缺点:(1)需要高压;(2)副产较大数量的次氮基三乙酸二钠盐;(3)需要用到大量的氢氰酸和氨气等剧毒气体。一旦泄漏将酿成重大环保事件,安全生产和环保风险很大。
2011年,Basf公司发展了另一合成方法(US20110257431),虽革除了氢氰酸,但仍然需要用到易燃易爆的环氧乙烷气体,仍然需要高压反应等。
发明内容
针对现有技术的不足,提供一种二羧甲基丙氨酸及其合成方法,以实现以下发明目的:
(1)本发明制备二羧甲基丙氨酸过程中,不需要高压,常压即可完成合成;
(2)本发明制备二羧甲基丙氨酸过程中,副产物少,收率高,大大提高了原料利用率,节约能源,降低消耗;
(3)本发明过程中不会产生氢氰酸和氨气等剧毒物质,安全系数高;
(4)本发明过程中操作简便,成本低,三废少;
(5)本发明制备的二羧甲基丙氨酸绿色环保可降解,具有良好的工业化前景。
为了实现上述发明目的,本发明采用的技术方案如下:
一种二羧甲基丙氨酸(Ⅰ),其特征在于:所述二羧甲基丙氨酸(Ⅰ),结构式如下:
以下是对上述技术方案的进一步改进:
一种二羧甲基丙氨酸(Ⅰ)的合成方法,其特征在于:包括混合反应步骤。
所述混合反应步骤:将2-氯丙酸和亚氨基二乙酸在一定反应温度下反应制得二羧甲基丙氨酸(Ⅰ)。
所述反应温度为100℃-150℃。
所述反应温度为120℃。
所述反应时间为4-10小时。
所述反应时间为6小时。
所述方法还包括步尾气处理步骤;所述尾气处理步骤:将尾气通入20%氢氧化钠溶液中。
所述方法还包括产物回收步骤;所述产物回收步骤:将混合反应后的混合液,降温至60℃,减压至10 mmHg后,蒸馏回收2-氯丙酸;剩余物用100 mL甲醇洗涤,过滤,50℃干燥得二羧甲基丙氨酸。
由于采用了上述技术方案,本发明达到的技术效果如下:
(1)本发明制备过程中,不需要高压,常压即可完成合成;
(2)本发明过程中,副产物少,收率高达85-97%;
(3)本发明过程中不会产生氢氰酸和氨气等剧毒物质,安全系数高;
(4)本发明过程中操作简便,成本低,三废少;,大大提高了原料利用率,节约能源,降低消耗;
(5)本发明制备的二羧甲基丙氨酸绿色环保可降解,具有良好的工业化前景。
具体实施方式
下述实施方式更好地说明本发明内容,但本发明不限于下述实施例;
以下是本发明的反应过程:
实施例1 二羧甲基丙氨酸的合成方法
步骤1 混合反应:
将亚氨基二乙酸(133 g, 1 mol) 和2-氯丙酸(217 g, 2 mol)加入反应瓶中,30分钟升温至120 ℃,反应6小时。
步骤2 尾气处理:
尾气通入20%氢氧化钠溶液中,进行尾气处理,回收。
步骤3 产物回收:
将混合反应后的混合液,降温至60度,减压至10 mmHg后,蒸馏回收2-氯丙酸,剩余物用100 mL甲醇洗涤,过滤,50度干燥得200 g二羧甲基丙氨酸,收率为97%。
检测指标如下:
ESI-MS:(m/z,%)=206(M+
1H NMR (DMSO-d 6):δ=1.22(d,3H),3.29(s,4H),3.67(q,1H)ppm。
实施例2 二羧甲基丙氨酸的合成方法
步骤1 混合反应:
将亚氨基二乙酸(133 g, 1 mol) 和2-氯丙酸(217 g, 2 mol)加入反应瓶中,30分钟升温至100 ℃,反应10小时。
步骤2 尾气处理:
尾气通入20%氢氧化钠溶液中,反应完毕。
步骤3 产物回收:
将混合反应后的混合液,降温至60度,减压至10 mmHg,蒸馏回收2-氯丙酸,剩余物用100 mL甲醇洗涤,过滤,50℃干燥得175 g二羧甲基丙氨酸,收率为85%。
1H NMR和MS与实例1一致。
实施例3 二羧甲基丙氨酸的合成方法
步骤1 混合反应:
将亚氨基二乙酸(133 g, 1 mol) 和2-氯丙酸(217 g, 2 mol)加入反应瓶中,30分钟升温至150 ℃,反应4小时,
步骤2 尾气处理:
尾气通入20%氢氧化钠溶液中,反应完毕。
步骤3 产物回收:
将混合反应后的混合液,降温至60度,减压至10 mmHg,蒸馏回收2-氯丙酸,剩余物用100 mL甲醇洗涤,过滤,50℃干燥得183 g二羧甲基丙氨酸,收率为89%。
1H NMR和MS与实例1一致。
除非另有说明和本领域常用单位,本发明中所采用的百分数均为重量百分数,本发明所述的比例,均为质量比例。
最后应说明的是:以上所述仅为本发明的优选实施例而已,并不用于限制本发明,尽管参照前述实施例对本发明进行了详细的说明,对于本领域的技术人员来说,其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。

Claims (1)

1.一种二羧甲基丙氨酸的合成方法,其特征在于:包括以下步骤:
步骤1 混合反应:将1 mol亚氨基二乙酸和2 mol 2-氯丙酸加入反应瓶中,30分钟升温至120℃,反应6小时;
步骤2 尾气处理:尾气通入20%氢氧化钠溶液中,进行尾气处理,回收;
步骤3 产物回收:将混合反应后的混合液,降温至60℃,减压至10 mmHg后,蒸馏回收2-氯丙酸,剩余物用 100 mL甲醇洗涤,过滤,50℃干燥得200 g二羧甲基丙氨酸,收率为97%。
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