CN107935869A - 琥珀酸去甲文拉法辛杂质及其制备方法和用途 - Google Patents

琥珀酸去甲文拉法辛杂质及其制备方法和用途 Download PDF

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CN107935869A
CN107935869A CN201711290478.2A CN201711290478A CN107935869A CN 107935869 A CN107935869 A CN 107935869A CN 201711290478 A CN201711290478 A CN 201711290478A CN 107935869 A CN107935869 A CN 107935869A
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impurity
acid
preparation
desmethylvenlafaxine
ethyl
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邓祥林
黄明会
宋跃成
王朋
廖兴婷
勾娟
钟齐昌
孙易
牟祥
赵伟淑
李大明
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Chongqing Zen Pharmaceutical Co Ltd
Chongqing Zhien Pharmaceutical Co Ltd
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    • 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
    • C07C213/08Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton by reactions not involving the formation of amino groups, hydroxy groups or etherified or esterified hydroxy groups
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    • C07C215/48Compounds containing amino and hydroxy groups bound to the same carbon skeleton having hydroxy groups bound to carbon atoms of at least one six-membered aromatic ring and amino groups bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings of the same carbon skeleton with amino groups linked to the six-membered aromatic ring, or to the condensed ring system containing that ring, by carbon chains not further substituted by hydroxy groups
    • C07C215/52Compounds containing amino and hydroxy groups bound to the same carbon skeleton having hydroxy groups bound to carbon atoms of at least one six-membered aromatic ring and amino groups bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings of the same carbon skeleton with amino groups linked to the six-membered aromatic ring, or to the condensed ring system containing that ring, by carbon chains not further substituted by hydroxy groups linked by carbon chains having two carbon atoms between the amino groups and the six-membered aromatic ring or the condensed ring system containing that ring
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    • C07C229/12Compounds 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 acyclic carbon skeletons

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Abstract

本发明公开了琥珀酸去甲文拉法辛杂质,即琥珀酸去甲文拉法辛杂质2和杂质I;此外,还公开了琥珀酸去甲文拉法辛杂质2、5、6、7、H、I的制备方法。本发明提供的琥珀酸去甲文拉法辛相关杂质及其制备,为琥珀酸去甲文拉法辛中间体、原料药及其组合物的质量研究夯实了基础。

Description

琥珀酸去甲文拉法辛杂质及其制备方法和用途
技术领域
本发明属于药物合成技术领域,更具体地涉及琥珀酸去甲文拉法辛相关杂质及其制备工艺。
背景技术
去甲文拉法辛是由美国wyeth-Ayerst在原有盐酸文拉法辛基础上进行研制,该公司研制的产品为琥珀酸去甲文拉法辛缓释片,FDA于2008年批准其上市。其化学名为R/S-(-)-4-[2-(N,N-二甲胺基)-1-(1-羟基环己烷基)乙基]苯酚1,4 -丁二酸一水合物;英文名为RS-4-(2-(dimethylamino)-1-(1-hydroxycyclohexy)ethyl)phenol succinatehydrate。
琥珀酸去甲文拉法辛的合成工艺:
以上琥珀酸去甲文拉法辛制备工艺路线产生的杂质如下:
杂质序号 化学结构
杂质1
杂质2
杂质3
杂质4
杂质5
杂质6
杂质7
杂质A
杂质B
杂质C
杂质D
杂质E
杂质F
杂质G
杂质H
杂质I
目前专利CN101538196报道了杂质1及其定向合成,专利2002MU00337报道了杂质B及其定向合成方法,文献Organic chemistry(15)3412~3420,2006报道了杂质3及其定向合成方法,文献Journal of chemistry 27(10),3564-3566,2015报道了杂质4及其定向合成方法,专利WO2011072703A1报道了杂质E及其定向合成方法;文献Synthetic Communications,13(40),1880-1886,2010报道了杂质A、杂质F、杂质G及其定向合成;专利WO0032555报道了杂质C、杂质D及其合成方法;专利WO2008015584A2报道了杂质H及其定向合成方法;杂质2和杂质I及其合成方法未见相关报道;杂质5、杂质6、杂质7其合成方法未见相关报道。通过定向合成目标杂质,建立目标杂质的检测方法,对琥珀酸去甲文拉法辛原料药的质量进行有效控制具有重要的意义。
发明内容
本发明人首次提供了两种新物质:一种是琥珀酸去甲文拉法辛杂质2,一种是琥珀酸去甲文拉法辛杂质I,还提供了杂质2、杂质5、杂质6、杂质7、杂质H和杂质I的一种制备方法,获得高纯度的以上杂质对照品,为琥珀酸去甲文拉法辛原料药及其相关制剂的质量研究夯实了基础。
本发明的目的是提供琥珀酸去甲文拉法辛的杂质化合物。
本发明的另一个目的是提供上述杂质化合物的制备方法。
本发明的第三个目的是提供上述杂质化合物的用途。
具体地说,在本发明的实施方案中,本发明提供了两种琥珀酸去甲文拉法辛杂质,即杂质2和杂质I,其化学结构式分别如下所示:
第二方面,本发明提供了琥珀酸去甲文拉法六种杂质的制备方法:在本发明的一种实施方案中,本发明提供了杂质2的制备方法,包括如下步骤:
将1-(2-氨基-1-(4-甲氧基苯基)乙基)环己醇盐酸盐(中间体B)与非质子类有机溶剂1混合,再与有机酸1混合后,于60~120℃温度下经脱水反应后得到目标化合物2-环己烯-2-(4-甲氧基苯基)乙氨盐酸盐(杂质2);
在本发明的一种实施方案中,本发明提供的杂质2的制备方法,进一步包括将脱水反应后产物经调碱、萃取、浓缩、调酸、和抽滤,得到目标化合物杂质2。
在本发明的一种实施方案中,本发明提供的杂质2的制备方法,其中,所述中间体B与有机酸1的摩尔比为1:1~1:5,更优选1:3~1:4。所述有机酸1选自甲酸、乙酸、苯甲酸、或对甲苯磺酸等,优选对甲苯磺酸。
在本发明的一种实施方案中,本发明提供的杂质2的制备方法,其中,所述非质子类有机溶剂1选自二氯甲烷、乙酸乙酯、甲苯、或二甲苯等,优选甲苯。
在本发明的一种实施方案中,本发明提供的杂质2的制备方法,其中,所述反应的温度60~120℃,优选反应温度为95~115℃。
在本发明的一种实施方案中,本发明提供的杂质2的制备方法,其中,所述调酸的pH值范围1~5,优选2~4。
在本发明的一种实施方案中,本发明提供了杂质5的制备方法,包括如下步骤:
2-环己烷基-2-(4-甲氧基苯基)-N,N-二甲基乙氨盐酸盐(杂质G),加入高沸点有机溶剂1,加入有机碱1,于150~200℃进行还原反应,即得目标化合物4-(1-环己醇基-2-(N,N-二甲基氨基)乙基)苯酚(杂质5);
在本发明的一种实施方案中,本发明提供的杂质5的制备方法,其中,所述杂质G与有机碱的摩尔比为1:1~1:5,更优选1:3~1:4。所述有机碱选自硫脲、甲醇钠、或十二烷基硫醇钠等,优选十二烷基硫醇钠。
在本发明的一种实施方案中,本发明提供的杂质5的制备方法,其中,所述高沸点溶剂1选自聚乙二醇、二甲亚砜,或N-甲基吡咯烷酮等,优选N-甲基吡咯烷酮作为反应溶剂。
在本发明的一种实施方案中,本发明提供的杂质5的制备方法,其中,所述反应的温度为150~200℃,更优选温度为160~180℃。
在本发明的一种实施方案中,本发明提供了杂质6的制备方法,包括如下步骤:
2 -(4-甲氧基苯基)-N,N-二甲基乙氨盐酸盐(杂质A),在无机酸条件下,于100~150℃进行还原反应,即得目标化合物4-(2-(N,N-二甲基氨基)乙基)苯酚(杂质6);
在本发明的一种实施方案中,本发明提供的杂质6的制备方法,其中,所述2 -(4-甲氧基苯基)-N,N-二甲基乙氨盐酸盐(杂质A)与无机酸的体积比为1:8~1:15,更优选1:8~1:12。所述无机酸包括硫酸、盐酸、氢溴酸等,优选氢溴酸。
在本发明的一种实施方案中,本发明提供的杂质6的制备方法,其中,所述反应的温度为100~150℃,更优选温度为110~130℃。
在本发明的一种实施方案中,本发明提供了杂质7的制备方法,包括如下步骤:
1-(1-(4-甲氧基苯基)-2-甲基氨基)乙基)环己醇盐酸盐(杂质C),加入高沸点有机溶剂2,加入有机碱2,于120~180℃进行还原反应,即得目标化合物4-(1-(1-羟基-环己烷基)-2-(甲基氨基)乙基)苯酚(杂质7);
在本发明的一种实施方案中,本发明提供的杂质7的制备方法,其中,所述1-(1-(4-甲氧基苯基)-2-甲基氨基)乙基)环己醇盐酸盐(杂质C)与有机碱2的摩尔比为1:1~1:5,更优选1:3~1:4。所述有机碱2选自硫脲、甲醇钠、十二烷基硫醇钠等,优选十二烷基硫醇钠。
在本发明的一种实施方案中,本发明提供的杂质7的制备方法,其中,所述高沸点溶剂2选自聚乙二醇、二甲亚砜,或N-甲基吡咯烷酮等,优选N-甲基吡咯烷酮作为反应溶剂;
在本发明的一种实施方案中,本发明提供的杂质7的制备方法,其中,所述反应的温度为120~180℃,更优选温度为140~160℃。
在本发明的一种实施方案中,本发明提供了杂质H的制备方法,包括如下步骤:
1-(2-氨基-1-(4-甲氧基苯基)乙基)环己醇盐酸盐(中间体B),加入高沸点有机溶剂3和有机碱3,于150~200℃进行还原反应,即得目标化合物4-(1-(1-羟基-环己烷基)-2-(氨基)乙基)苯酚盐酸盐与4-(甲基氨基)正丁酸盐酸盐的络合物(杂质H);
在本发明的一种实施方案中,本发明提供的杂质H的制备方法,其中,所述1-(2-氨基-1-(4-甲氧基苯基)乙基)环己醇盐酸盐与有机碱3的摩尔比为1:1~1:5,更优选1:3~1:4。所述有机碱3选自硫脲、甲醇钠、十二烷基硫醇钠等,优选十二烷基硫醇钠。
在本发明的一种实施方案中,本发明提供的杂质H的制备方法,其中,所述高沸点溶剂3选自聚乙二醇、二甲亚砜,或N-甲基吡咯烷酮等,优选N-甲基吡咯烷酮作为反应溶剂。
在本发明的一种实施方案中,本发明提供的杂质H的制备方法,其中,所述反应的温度为150~200℃,更优选温度为160~180℃。
在本发明的一种实施方案中,本发明提供了杂质I的制备方法,包括如下步骤:
将4-(2-(N,N二甲基氨基)-1-(羟基环己烷基)乙基)苯酚(粗品碱基)与非质子类有机溶剂2混合后,再与有机酸2混合,于60~120℃温度下经脱水反应后经调碱、萃取、浓缩、调酸、抽滤得到目标化合物4-(1-环己烯基-2-(N,N-二甲基氨基)乙基)苯酚(杂质I);
在本发明的一种实施方案中,本发明提供的杂质I的制备方法,其中,所述粗品碱基与有机酸2的摩尔比为1:1~1:5,优选1:3~1:4。所述有机酸2选自甲酸、乙酸、苯甲酸、对甲苯磺酸等,优选对甲苯磺酸。
在本发明的一种实施方案中,本发明提供的杂质I的制备方法,其中,所述反应的温度为60~120℃,优先95~115℃。
在本发明的一种实施方案中,本发明提供的杂质I的制备方法,其中,非质子类有机溶剂2选自二氯甲烷、乙酸乙酯、甲苯、二甲苯等,优选甲苯作为反应溶剂。
在本发明的一种实施方案中,本发明提供的杂质I的制备方法,其中,调酸的pH值范围1~5,优选2~4。
第三方面,本发明提供了琥珀酸去甲文拉法辛杂质2和杂质I作为对照品的用途。
本发明的有益结果在于:
首次合成了两个新物质:琥珀酸去甲文拉法辛杂质2和杂质I,还提供了杂质2、杂质5、杂质6、杂质7、杂质H和杂质I制备的方法,且所述方法制备得到的琥珀酸去甲文拉法辛杂质2、杂质5、杂质6、杂质7、杂质H和杂质I的纯度均在98%以上,可以作为对照品用于的质量研究。
附图说明
图1表示的是琥珀酸去甲文拉法辛杂质2的液相图谱。
图2表示的是琥珀酸去甲文拉法辛杂质5的液相图谱。
图3表示的是琥珀酸去甲文拉法辛杂质6的液相图谱。
图4表示的是琥珀酸去甲文拉法辛杂质7的液相图谱。
图5表示的是琥珀酸去甲文拉法辛杂质H的液相图谱。
图6表示的是琥珀酸去甲文拉法辛杂质I的液相图谱。
图7表示的是琥珀酸去甲文拉法辛原料药与杂质的分离数据比较,其中,图7中峰序号代表的物质如下:
峰序号 代表的物质
1 杂质4
2 杂质A
3 杂质H
4 杂质7
5 琥珀酸去甲文拉法辛
6 中间体B
7 杂质C
8 中间体C
9 杂质5
10 杂质2
11 杂质D
12 杂质F
13 杂质G
14 杂质B
15 中间体A
具体实施方式
下面通过本发明实施例进行具体描述本发明的实施方案。
表1为杂质2、杂质5、杂质7、杂质H、杂质I高效液相检测条件
表2为杂质6高效液相检测条件
表1
表2
本发明实施例所制得杂质核磁氢谱及质谱分析条件如下:
核磁氢谱分析:仪器:Agilent 600DD2(600MHz)高分辨核磁共振仪
测试条件:溶剂DMSO;
温度30℃。
质谱分析:仪器:Bruker maXis 4G
质谱条件:
离子原类型:ESI
动态验证:1
毛细管电压(kV):2.50
锥孔电压(V):30.00
二级锥孔电压(V):0.00
透镜电压(V):0.00
离子源温度(℃):100
去溶剂温度(℃):350
锥孔气流速(L/Hr):55
雾化气流速(L/Hr):550[N1]
实例1琥珀酸去甲文拉法辛杂质2的制备
1、杂质2制备
将(5.00g(0.018mol)1-(2-氨基-1-(4-甲氧基苯基)乙基)环己醇盐酸盐(中间体B)和甲苯50ml加入三口瓶中,搅拌溶清后,加入1.88g三乙胺(0.15mol)搅拌8~10分钟,加入10.65g对甲苯磺酸(0.061mol),搅拌升温至100~110℃,保温反应3~5h。反应结束后,降温至5~15℃,加入10%氢氧化钠溶液调节PH=9~10,分液,有机相用25ml乙酸乙酯萃取两次,合并有机相,加入10g无水硫酸钠干燥脱水,过滤,收集滤液减压浓缩,残留物加入10ml异丙醇和10ml异丙醚,搅拌溶清后,降温至0~10℃,滴加盐酸乙醇调节PH至2~3,搅拌结晶,过滤,滤饼减压干燥即得2-环己烯-2-(4-甲氧基苯基)乙氨盐酸盐(杂质2)3.78g,收率80.77%,纯度98.76%。H1-NMR (600HZ,DMSO-d6) :7.90(1H,brs),7.15(2H,d),6.89(2H,d),5.68(1H,s),3.73(3H,s),3.45(1H,m),3.24(1H,m),3.06(1H,m),2.01(2H,s),1.77(1H,d),1.66(1H,d),1.48(4H,m);MS(m/z):232[M+H]+
琥珀酸去甲文拉法辛原料药与杂质的分离数据比较如图7.
实例2琥珀酸去甲文拉法辛杂质5的制备
于反应瓶中加入2-环己烷基-2-(4-甲氧基苯基)-N,N-二甲基乙氨盐酸盐(杂质G)5.00g(17mmol),十二烷基硫醇钠15.00g(59mmol),N-甲基吡咯烷酮30ml,搅拌升温至170~180℃,保温反应5~8h。反应完全后,降温至40℃以下,加入水20ml和乙酸乙酯20ml,降温至0~10℃,滴加浓盐酸调节PH至1~2,分液,水相用乙酸乙酯20ml萃取,收集水相,降温至0~10℃,用10%氢氧化钠溶液调剂PH至9~10,过滤,收集滤饼,于乙酸乙酯10ml中搅拌升温至7~80℃,搅拌溶清后,降温至5~15℃,搅拌结晶,过滤,滤饼减压干燥即得目标化合物4-(1-环己醇基-2-(N,N-二甲基氨基)乙基)苯酚(杂质5)3.09g,收率74.54%,纯度99.07%。H1-NMR(600HZ,DMSO-d6) :9.05(1H,s),6.88(2H,d),6.63(2H,d), 2.48(2H,m),2.41(1H,m),2.04(6H,s) ,1.72(1H,d),1.64(1H,d), 1.58(1H,d), 1.53(1H,d), 1.43(2H,m), 1.16(1H,m), 1.07(1H,m),0.96(1H,m), 0.84(1H,m), 0.70(1H,m);MS(m/z):248.39[M+1]+
实例3琥珀酸去甲文拉法辛杂质6的制备
于反应瓶中加入2 -(4-甲氧基苯基)-N,N-二甲基乙氨盐酸盐8.00g(37mmol)和氢溴酸80ml(40%),搅拌升温至120~130℃反应3~5小时。反应完全后,降温至0~20℃,滴加40%氢氧化钠溶液调节PH至9~11,加入乙酸乙酯24ml搅拌分液,水相用乙酸乙酯24ml萃取,合并有机相,加入12g无水硫酸钠干燥脱水,过滤,收集滤液减压浓缩至干,残留物再加入8ml乙酸乙酯搅拌升温至65~75℃,溶清后,降温至5~15℃,保温结晶,过滤,滤饼减压干燥即得目标化合物4-(2-(N,N-二甲基氨基)乙基)苯酚(杂质6)4.35g,收率71.54%,纯度98.64%。H1-NMR(600HZ,DMSO-d6) : 10.87(1H,s),9.43(1H,s),7.05(2H,d),6.73(2H,d), 3.17(2H,m),2.89(2H,m),2.75(6H,s)d),;MS(m/z):166.28[M+1]+
实例4琥珀酸去甲文拉法辛杂质7的制备
于反应瓶中加入1-(1-(4-甲氧基苯基)-2-甲基氨基)乙基)环己醇盐酸盐5.00g(0.017mol),十二烷基硫醇钠13.35g(0.059)和N-甲基吡咯烷酮20ml,在氮气保护下搅拌升温至140~160℃反应10~12h。反应完全后,降温至40℃以下,加入水10ml和20ml乙酸乙酯,降温至5~15℃,滴加浓盐酸调节PH至1~2,分液,水相用20ml乙酸乙酯萃取,收集水相,降温至0~10℃,滴加40%氢氧化钠溶液调节PH至8.5~9.5,加入氯化钠5g使水相饱和,分液,水相一乙酸乙酯萃取,合并有机相,加入无水硫酸钠5.0g干燥,过滤,滤液减压浓缩至干,残留物柱层析纯化,用洗脱剂(二氯甲烷/甲醇=20:1至10:1)梯度洗脱产品,收集产品点,浓缩洗脱液即68.58%,纯度99.75%。H1-NMR (600HZ,DMSO-d6) : 6.98(2H,d),6.66(2H,d), 3.11(1H,dd),2.77(1H,dd),2.66(1H,q),2.25(3H,s) ,1.79(1H,s),1.48(5H,m), 1.32(2H,m),1.08(2H,m), 0.91(1H,m);MS(m/z):250.38[M+1]+
实例5琥珀酸去甲文拉法辛杂质H的制备
于反应瓶中加入1-(2-氨基-1-(4-甲氧基苯基)乙基)环己醇盐酸盐(中间体B)3.00g(0.012mol),十二烷基硫醇钠9.16g(0.042mol),N-甲基吡咯烷酮15ml,搅拌升温至170~180℃反应5~8小时。反应完全后,降温至40℃以下,加入6ml水和6ml乙酸乙酯,降温至0~10℃,用浓盐酸调节PH至1~2,分液,水相用乙酸乙酯萃取,收集水相,降温至0~10℃,滴加40%氢氧化钠溶液调节PH至6.5~7.5,体系于75℃以下热水浴中减压浓缩至干,残留物用乙酸乙酯6ml和乙醇3ml溶解后,滤出不溶物,收集滤液浓缩至干,残留物加入1ml乙醇和2ml乙酸乙酯,体系溶清后,降温至0~10℃,滴加盐酸乙醇调节PH至2~3,滴加3ml异丙醚,搅拌结晶,过滤,滤饼减压干燥即得目标化合物4-(1-(1-羟基-环己烷基)-2-(氨基)乙基)苯酚盐酸盐与4-(甲基氨基)正丁酸盐酸盐的络合物(杂质H)2.89g,收率70.83%,纯度99.81%。H1-NMR(600HZ,DMSO-d6) : 12.23(1H,brs), 9.17(2H,brs), 2.84(2H,t), 2.47(3H,s), 2.34(2H,t), 1.83(2H,m), 9.42(1H,brs), 7.77(1H,brs),7.05(1H,d),6.73(1H,d), 4.45(1H,brs),3.33(1H,dd),3.05(1H,t),2.80(1H,dd) ,1.54(2H,m),1.37~1.47(3H,m), 1.16~1.29(3H,m), 1.05(1H,m), 1.00(1H,m);MS(m/z):236.37[M+1]+
实例6琥珀酸去甲文拉法辛杂质I的制备
将(5.00g(0.019mol)4-(2-(N,N二甲基氨基)-1-(羟基环己烷基)乙基)苯酚(粗品碱基)(粗品碱基)和甲苯50ml加入三口瓶中,搅拌溶清后,加入11.24g对甲苯磺酸(0.067mol),搅拌升温至100~110℃,保温反应3~5h。反应结束后,降温至5~15℃,加入10%氢氧化钠溶液调节PH=9~10,分液,有机相用25ml乙酸乙酯萃取两次,合并有机相,加入10g无水硫酸钠干燥脱水,过滤,收集滤液减压浓缩,残留物加入10ml异丙醇和10ml异丙醚,搅拌溶清后,降温至0~10℃,滴加盐酸乙醇调节PH至2~3,搅拌结晶,过滤,滤饼减压干燥即得物4-(1-环己烯基-2-(N,N-二甲基氨基)乙基)苯酚(杂质I)3.53g,收率75.75%,纯度99.79%。52H1-NMR (600HZ,DMSO-d6) :9.09(1H,brs),6.97(2H,d),6.65(2H,d),5.52(1H,t),3.26(1H,t),2.44~2.54(2H,m),2.09(6H,s),1.70~1.82(4H,m),1.44~1.45(4H,m);MS(m/z):[M+H]+ 。
最后说明的是,以上实施例仅用以说明本发明的技术方案而非限制,尽管通过参照本发明的优选实施例已经对本发明进行了描述,但本领域的普通技术人员应当理解,可以在形式上和细节上对其作为各种各样的改变,而不偏离所附权利要求所限定的本发明的精神和范围。

Claims (10)

1.一种琥珀酸去甲文拉法辛杂质2,其结构如下:
2.权利要求1所述琥珀酸去甲文拉法辛杂质2的制备方法,包括如下步骤:
将1-(2-氨基-1-(4-甲氧基苯基)乙基)环己醇盐酸盐(中间体B)与非质子类有机溶剂1,再与有机酸1混合后,于60~120℃温度下经脱水反应后经调碱、萃取、浓缩、调酸、抽滤得到目标化合物2-环己烯-2-(4-甲氧基苯基)乙氨盐酸盐(杂质2);
3.如权利要求2所述琥珀酸去甲文拉法辛杂质2的制备方法,其中,中间体B与有机酸1的摩尔比为1:3~1:4;所述有机酸1选自甲酸、乙酸、苯甲酸、对甲苯磺酸等,优选对甲苯磺酸;
所述反应的温度为60~120℃,优先95~115℃;
所述要求非质子类有机溶剂1选自二氯甲烷、乙酸乙酯、甲苯、或二甲苯等,优选甲苯作为反应溶剂;
所述调酸的pH值范围1~5,优选2~4。
4.一种琥珀酸去甲文拉法辛杂质I,其结构如下:
5.权利要求4所述琥珀酸去甲文拉法辛杂质I的制备方法,包括如下步骤:
将4-(2-(N,N二甲基氨基)-1-(羟基环己烷基)乙基)苯酚(粗品碱基)与非质子类有机溶剂2混合后,加入有机酸2,于60~120℃温度下经脱水反应后经调碱、萃取、浓缩、调酸、抽滤得到目标化合物4-(1-环己烯基-2-(N,N-二甲基氨基)乙基)苯酚(杂质I);
6.如权利要求5所述琥珀酸去甲文拉法辛杂质I的制备方法,其中,所述粗品碱基与有机酸2的摩尔比为1:3~1:4;所述有机酸2选自甲酸、乙酸、苯甲酸、或对甲苯磺酸等,优选对甲苯磺酸;
所述反应的温度为60~120℃,优先95~115℃;
所述要求非质子类有机溶剂选自二氯甲烷、乙酸乙酯、甲苯、或二甲苯等,优选甲苯作为反应溶剂;
所述调酸的pH值范围1~5,优选2~4。
7.琥珀酸去甲文拉法辛杂质5的制备方法,包括如下步骤:
2-环己烷基-2-(4-甲氧基苯基)-N,N-二甲基乙氨盐酸盐(杂质G),加入高沸点溶剂1,加入有机碱1,于170~180℃进行还原反应后,经酸化和碱化过滤即得目标化合物4-(1-环己醇基-2-(N,N-二甲基氨基)乙基)苯酚(杂质5);
8.琥珀酸去甲文拉法辛杂质6的制备方法,包括如下步骤:
2 -(4-甲氧基苯基)-N,N-二甲基乙氨盐酸盐,在无机酸条件下,于100~150℃进行还原反应,即得目标化合物4-(2-(N,N-二甲基氨基)乙基)苯酚(杂质6);
9.琥珀酸去甲文拉法辛杂质7的制备方法,包括如下步骤:
1-(1-(4-甲氧基苯基)-2-甲基氨基)乙基)环己醇盐酸盐(杂质C),加入高沸点有机溶剂2,加入有机碱2,于140~160℃进行还原反应,酸化和碱化,过滤即得目标化合物4-(1-(1-羟基-环己烷基)-2-(甲基氨基)乙基)苯酚(杂质7);
10.琥珀酸去甲文拉法辛杂质H的制备方法,包括如下步骤:
1-(2-氨基-1-(4-甲氧基苯基)乙基)环己醇盐酸盐,加入高沸点有机溶剂3和有机碱3,于170~180℃进行还原反应,经酸化和碱化即得目标化合物4-(1-(1-羟基-环己烷基)-2-(氨基)乙基)苯酚盐酸盐与4-(甲基氨基)正丁酸盐酸盐的络合物(杂质H);
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