CN1865259B - 一种哌啶衍生物的制备方法 - Google Patents

一种哌啶衍生物的制备方法 Download PDF

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CN1865259B
CN1865259B CN 200510070952 CN200510070952A CN1865259B CN 1865259 B CN1865259 B CN 1865259B CN 200510070952 CN200510070952 CN 200510070952 CN 200510070952 A CN200510070952 A CN 200510070952A CN 1865259 B CN1865259 B CN 1865259B
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rupatadine
formula
milliliters
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CN1865259A (zh
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曲峰
王玉生
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Beijing Sihuankebao Pharmaceutical Co., Ltd.
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BEIJING D-VENTURE PHARM T CORP
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Abstract

一种的卢帕他定(Rupatadine)或其盐的制备方法。卢帕他定的化学结构如式(I)所示。

Description

一种哌啶衍生物的制备方法
发明领域
本发明涉及抗过敏药物卢帕他定或其盐的制备方法。
发明背景
卢帕他定作为组胺和血小板凝聚双重拮抗剂,于2003年在欧洲上市,应用于治疗过敏性鼻炎和枯草热,具有广阔的市场前景。卢帕他定具有下式(I)的化学结构。
Figure S05170952120050524D000011
卢帕他定可以以地洛他定为起始原料,从2种合成路线合成制备:
路线1
Figure S05170952120050524D000021
路线2
在上述2条路线中,路线1收率低,反应难以控制,且很难得到较纯的产品。
路线2关键的合成步骤为还原酰胺。在已经公开的文献报道中,将酰胺化合物还原为相应胺的方法有以下两种:
在专利ES2087818中,报道了用POCl3/NaBH4作为还原剂还原酰胺的方法。但是,该方法操作繁琐,且所得产品纯化困难,需要通过柱层析才能得到合格产品。
在美国专利No.5407941中介绍了在四氢呋喃溶液中,用氢化铝锂做为还原剂的还原方法,但按照该方法进行实验验证,结果并未得到目标产物。
鉴于目标化合物的应用价值,有必要寻找一条操作简便、收率良好,且产品的纯度令人满意的合成路线。
发明目的
本发明的目的是提供一种操作简便、收率良好,且产品的纯度良好的卢帕他定及其盐的制备方法。
发明内容
本专利提供的卢帕他定及其盐的制备方法包括:在非质子性溶液中,用双氢铝酸钠(Red-Al)作为还原剂,对式(II)所示化合物进行还原反应,得到卢帕他定及其盐。
本发明的特征是,采用了新型试剂双氢铝酸钠(Red-Al)作为还原试剂,对酰胺键进行还原,进而达到经济、高效制备高纯度卢帕他定及其盐的目的。该方法简便有效、收率良好,且产品的纯度令人满意。
本发明的详细公开:
在非质子性溶剂中,优选四氢呋喃为溶剂,加热温度为0~40℃,优选20~25℃;反应底物与双氢铝酸钠(Red-Al)的摩尔比例为1:2~1:6,优选摩尔比例为1:3,对式(II)所示化合物进行还原,制备式(I)化合物,如需要,可用一般成盐的方法,将产物制备成盐。
以下的实施例在于详细说明本发明,而非限制本发明。
实施例
实施例1
在氮气的保护下,向500毫升的三口瓶中加入150毫升四氢呋喃、50毫升甲苯,在搅拌下加入经过真空干燥的酰胺15.0克,用冰盐浴降温到0℃。取18毫升双氢铝酸钠(Red-Al),用15毫升甲苯稀释,滴加到反应瓶中,滴加完毕,搅拌36小时。反应完毕后,冰水浴下滴加10毫升水,搅拌3小时,抽滤,滤饼用四氢呋喃洗两次,滤液合并减压脱净溶剂,得到棕红色粘稠物。加甲苯溶解,用稀酸洗涤后干燥。滤除干燥剂,脱溶,固化,得到目标化合物8.7克。收率:60%。
HPLC纯度:98.5%。
实施例2
在氮气的保护下,向1000毫升的三口瓶中加入300毫升四氢呋喃、100毫升甲苯,在搅拌下加入经过真空干燥的酰胺30.0克,用冰盐浴降温到0℃。取110毫升双氢铝酸钠(Red-Al),用100毫升甲苯稀释,滴加到反应瓶中。滴加完毕,自然升至室温,搅拌过夜。反应完毕后,冰水浴下滴加40毫升水,搅拌4小时,抽滤,滤渣用四氢呋喃洗两次,滤液合并减压脱净溶剂,得到棕红色粘稠物。加甲苯溶解,用稀酸洗涤后干燥。滤除干燥剂,脱溶,固化,得到目标化合物20.2克。收率:70%。
HPLC纯度:98.7%。

Claims (4)

1.一种卢帕他定的制备方法,卢帕他定的化学结构如式(I)所示:
Figure FSB00000060788400011
该方法的特征为:将式(II)化合物
Figure FSB00000060788400012
在非质子性溶剂中,加热温度为0~40℃,反应底物与双(甲氧基乙氧基)铝氢化钠的摩尔比例为1∶2~1∶6,对式(II)所示化合物进行还原,制备式(I)化合物,非质子性溶剂选自四氢呋喃。
2.根据权利要求1所述的方法,其中式(II)的化合物与双(甲氧基乙氧基)铝氢化钠的摩尔比是1∶3。
3.根据权利要求1所述的方法,进行还原反应的温度为20~25℃。
4.根据权利要求1所述的方法,用一般成盐的方法,将产物制备成盐。
CN 200510070952 2005-05-19 2005-05-19 一种哌啶衍生物的制备方法 Expired - Fee Related CN1865259B (zh)

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Publication number Priority date Publication date Assignee Title
CN101274931B (zh) * 2008-05-13 2010-09-29 杭州澳医保灵药业有限公司 一种卢帕他定的制备工艺
CN102653535A (zh) * 2011-12-09 2012-09-05 东莞达信生物技术有限公司 卢帕他定游离碱及其制取方法
CN105130956A (zh) * 2015-07-23 2015-12-09 上海新亚药业有限公司 富马酸卢帕他定的制备工艺

Citations (1)

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US20040033986A1 (en) * 2002-05-17 2004-02-19 Protopopova Marina Nikolaevna Anti tubercular drug: compositions and methods

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040033986A1 (en) * 2002-05-17 2004-02-19 Protopopova Marina Nikolaevna Anti tubercular drug: compositions and methods

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
Elena Carceller.[(3-Pyridylalkyl)piperidylidenelbenzocycloheptapyridineDerivatives as Dual Antagonists of PAF and Histamine.Journal of Medicinal Chemistry37 17.1994,37(17),2697-2703.
Elena Carceller.[(3-Pyridylalkyl)piperidylidenelbenzocycloheptapyridineDerivatives as Dual Antagonists of PAF and Histamine.Journal of Medicinal Chemistry37 17.1994,37(17),2697-2703. *
Medicinal Chemistry Letters9 3.1999,9(3),475-480. *
Thomas C.Britton等.STRUCTURE-ACTIVITY RELATIONSHIPS OF ASERW~SOF BENZOTHIOPHENE DERIVEDNPY Y1ANTAGONISTS: OPTIMIZATION OF THE C-2 SIDECHAIN.Bioorganic & Medicinal Chemistry Letters9 3.1999,9(3),475-480.
Thomas C.Britton等.STRUCTURE-ACTIVITY RELATIONSHIPS OF ASERW~SOF BENZOTHIOPHENE DERIVEDNPY Y1ANTAGONISTS: OPTIMIZATION OF THE C-2 SIDECHAIN.Bioorganic &amp *

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