CN104151231B - 一种2,2’‑联吡啶的制备方法 - Google Patents

一种2,2’‑联吡啶的制备方法 Download PDF

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CN104151231B
CN104151231B CN201410462176.9A CN201410462176A CN104151231B CN 104151231 B CN104151231 B CN 104151231B CN 201410462176 A CN201410462176 A CN 201410462176A CN 104151231 B CN104151231 B CN 104151231B
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CN104151231A (zh
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吴锋
程柯
李世洪
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Guangan Lier Chemical Co Ltd
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    • 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
    • C07D213/06Heterocyclic 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 containing only hydrogen and carbon atoms in addition to the ring nitrogen atom
    • C07D213/22Heterocyclic 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 containing only hydrogen and carbon atoms in addition to the ring nitrogen atom containing two or more pyridine rings directly linked together, e.g. bipyridyl
    • CCHEMISTRY; METALLURGY
    • 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
    • C07D213/06Heterocyclic 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 containing only hydrogen and carbon atoms in addition to the ring nitrogen atom
    • C07D213/127Preparation from compounds containing pyridine rings

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Abstract

本发明公开了一种2,2'‑联吡啶的制备方法,以锰盐或钴盐作为催化剂,将2‑氯吡啶格氏试剂和2‑氯吡啶反应生成2,2'‑联吡啶;此外,本发明还公开了以2‑氯吡啶为原料,一锅法完成格氏反应和偶联反应最终生成2,2'‑联吡啶的方法。本发明提供的2,2'‑联吡啶制备方法,具有原料易得,催化剂价格低廉、稳定,对环境友好,成本低廉,操作简单、方便的优点,能够满足工厂大规模生产的需要,具有广阔的市场应用前景。

Description

一种2,2’-联吡啶的制备方法
技术领域
本发明涉及化工领域,尤其是合成领域,具体为一种2,2'-联吡啶的制备方法。
背景技术
2,2’-联吡啶是一种重要的化工中间体,其广泛应用于农药、医药、香料及染料的合成。同时,它还是一种金属螯合剂,可用于金属显色剂。
Synthesis of 2,2′‐Bipyridines:Versatile Building Blocks for SexyArchitectures and Functional Nanomaterials(G R Newkome等,Eur.J.Org.Chem,2004,235-254)中介绍了采用2-卤代吡啶自身偶联是制备2,2’-联吡啶的常用方法之一。中国专利CN103172559及CN103030594中公开了,以廉价的2-氯吡啶为原料,进行2,2’-联吡啶生产的方法。然而,这些方法通常需要使用大量的重金属锌和较为昂贵的催化剂,使得生产成本较高,并且环保性较差。
虽然有文献报道了以吡啶格氏试剂制备2,2’-联吡啶的方法(SyntheticCommunications,38,3861–3874,2008;Tetrahedron,Vol.38,No.22,pp.3347—3354,1982),但该方法中,需要使用价格昂贵的2-溴吡啶,这也使得2,2’-联吡啶的生产成本居高不下。
因此,迫切需要一种新的能够有效降低2,2’-联吡啶生产成本的方法,以满足其工业化生产的需要。
发明内容
本发明的发明目的在于:针对目前现有的2,2’-联吡啶制备方法中,需要采用大量的重金属锌和较为昂贵的催化剂,或者需要采用价格昂贵的2-溴吡啶,导致2,2’-联吡啶的生产成本居高不下的问题,提供一种2,2'-联吡啶的制备方法。本发明提供的2,2'-联吡啶制备方法,具有原料易得,催化剂价格低廉、稳定,对环境友好,成本低廉,操作简单、方便的优点,能够满足工厂大规模生产的需要。本发明能够有效降低2,2'-联吡啶制备的成本,具有广阔的市场应用前景。
本发明旨在开发一种成本低廉,适合工业化生产的2,2’-联吡啶合成工艺。
为了实现上述目的,本发明采用如下技术方案:
一种2,2'-联吡啶的制备方法,其特征在于,以锰盐或钴盐作为催化剂,将2-氯吡啶格氏试剂和2-氯吡啶反应生成2,2'-联吡啶,反应方程式如下:
所述催化剂的摩尔量为2-氯吡啶格氏试剂摩尔量的1%~5%。
所述催化剂的摩尔量为2-氯吡啶格氏试剂摩尔量的3%。
所述催化剂为二氯化锰、溴化锰、二氯化钴、醋酸钴中的一种或多种。
所述2-氯吡啶格氏试剂的制备以及后续的偶联反应采用一锅法完成。
在制备时,2-氯吡啶的摩尔量是金属镁的1.6倍以上,格氏试剂制备完成后直接加入催化剂进行后续的偶联反应,得到2,2'-联吡啶。
所述格氏试剂的制备过程中,2-氯吡啶的摩尔量是金属镁的1.6-2倍,格氏试剂制备完成后,直接加入催化剂进行后续的偶联反应,得到2,2'-联吡啶。
所述格氏试剂在惰性气体条件下制备而成。
针对现有方法存在的问题,本发明提供一种2,2'-联吡啶的制备方法。申请人采用2-氯吡啶格氏试剂和2-氯吡啶为原料,以锰盐或钴盐作为催化剂,反应生成2,2'-联吡啶。本发明中,采用的原料廉价易得,能够有效降低生产成本,同时,本发明中避免了大量重金属锌的使用,具有环保、对环境友好的特点。
同时,本发明中采用锰盐或钴盐作为催化剂,优选采用MnCl2或者CoCl2作为催化剂。氯化锰,又称二氯化锰,分子式为MnCl2。氯化钴,又称二氯化鈷,其分子式为CoCl2。本发明的催化剂,与三苯基膦配位的PdCl2、NiCl2相比,要低廉的多。同时,本发明的催化剂对空气稳定,不易中毒。
并且,本发明的方法具有操作简单、方便的优点,适于工业化大规模生产的需要。本发明可采用一锅法完成,即格式试剂的制备与后续偶联反应能够在一起反应器中完成,具体操作为:先制备格氏试剂,2-氯吡啶的摩尔量是金属镁的1.6-2倍,待格氏试剂制备完成后,直接加入催化剂继续反应,得到2,2'-联吡啶。
综上所述,由于采用了上述技术方案,本发明的有益效果是:
1)本发明利用2-氯吡啶格氏试剂与2-氯吡啶偶联,得到2,2’-联吡啶,其原料易得,生产成本低,同时避免了大量重金属锌的使用,对环境友好;
2)本发明的催化剂价格低廉,能够有效降低2,2’-联吡啶的生产成本,并且对空气稳定,不易中毒;
3)本发明操作简单,制备方便,同时可采用一锅法完成2-氯吡啶格氏试剂、2,2’-联吡啶,具有操作简单、方便的特点,能够满足工厂大规模生产的需要。
具体实施方式
本说明书中公开的所有特征,或公开的所有方法或过程中的步骤,除了互相排斥的特征 和/或步骤以外,均可以以任何方式组合。
本说明书中公开的任一特征,除非特别叙述,均可被其他等效或具有类似目的的替代特征加以替换。即,除非特别叙述,每个特征只是一系列等效或类似特征中的一个例子而已。
实施例1
取30ml的2-氯吡啶格氏试剂的无水四氢呋喃(THF)溶液(其中含2-氯吡啶格氏试剂10mmol),向其中加入0.3mmol的MnCl2和9.5mmol的2-氯吡啶,室温反应1h。将反应所得的混合物用水淬灭,再用二氯甲烷萃取,过滤,二氯甲烷冲洗滤饼,将冲洗得到的液体部分静置分相,收集有机相。将有机相减压蒸除溶剂,得到粗品,再经减压蒸馏,得到白色固体1.17g。
经测定,白色固体的熔点:69.4~69.8℃,MS:m/z=156.1,确定其为2,2’-联吡啶。
实施例2
向100mL三口瓶中加入0.6g(0.025mol)镁屑,氮气置换三次。再取4.54g(0.04mol)2-氯吡啶和45.4gTHF,组成第一溶液。向经过氮气置换后的三口瓶中加入少量第一溶液,再在室温条件下加入0.2g(10mol%)的溴乙烷引发格氏反应,引发后继续滴加剩余第一溶液。滴加完成后,再加入0.16g(3mol%)无水MnCl2,继续搅拌反应1h后停止反应。然后向三口瓶中加入5g水淬灭,再加10ml的二氯甲烷萃取,过滤,二氯甲烷冲洗滤饼,液体部分静置分相,收集有机相,减压蒸除溶剂,得到粗品,减压蒸馏得到白色固体2.18g。
经测定,白色固体为2,2’-联吡啶。
实施例3
向100mL三口瓶中加入0.024mol镁屑,氮气置换三次。再取4.54g(0.04mol)2-氯吡啶和45.4gTHF,组成第一溶液。向经过氮气置换后的三口瓶中加入少量第一溶液,再在室温条件下加入0.2g(10mol%)的溴乙烷引发格氏反应,引发后继续滴加剩余第一溶液。滴加完成后,再加入0.16g(3mol%)无水CoCl2,继续搅拌反应1h后,停止反应。然后向三口瓶中加入5g水淬灭,再加10ml的二氯甲烷萃取,过滤,二氯甲烷冲洗滤饼,液体部分静置分相,收集有机相,减压蒸除溶剂,得到粗品,减压蒸馏得到白色固体2.1g。
经测定,白色固体为2,2’-联吡啶。
实施例4
向100mL三口瓶中加入0.025mol镁屑,氮气置换三次。再取4.54g(0.04mol)2-氯吡啶和45.4gTHF,组成第一溶液。向经过氮气置换后的三口瓶中加入少量第一溶液,再在室温条件下加入0.2g(10mol%)的溴乙烷引发格氏反应,引发后继续滴加剩余第一溶液。滴加完成后,再加入0.43g(5mol%)无水MnBr2,继续搅拌反应1h后,停止反应。然后向三口 瓶中加入5g水淬灭,再加10ml的二氯甲烷萃取,过滤,二氯甲烷冲洗滤饼,液体部分静置分相,收集有机相,减压蒸除溶剂,得到粗品,减压蒸馏得到白色固体2.15g。
经测定,白色固体为2,2’-联吡啶。
实施例5
向100mL三口瓶中加入0.48g(0.02mol)的镁屑,氮气置换三次。再取4.54g(0.04mol)2-氯吡啶和45.4gTHF,组成第一溶液。向经过氮气置换后的三口瓶中加入少量第一溶液,再在室温条件下加入0.2g(10mol%)的溴乙烷引发格氏反应,引发后继续滴加剩余第一溶液。滴加完成后,再加入0.30g(3mol%)无水Co(CH3COO)2,继续搅拌反应1h后,停止反应。然后向三口瓶中加入5g水淬灭,再加10ml的二氯甲烷萃取,过滤,二氯甲烷冲洗滤饼,液体部分静置分相,收集有机相,减压蒸除溶剂,得到粗品,减压蒸馏得到白色固体2g。
经测定,白色固体为2,2’-联吡啶。
实施例6
向100mL三口瓶中加入0.025mol镁屑,氮气置换三次。再取4.54g(0.04mol)2-氯吡啶和45.4gTHF,组成第一溶液。向经过氮气置换后的三口瓶中加入少量第一溶液,再在室温条件下加入0.2g(10mol%)的溴乙烷引发格氏反应,引发后继续滴加剩余第一溶液。滴加完成后,再加入0.25g(5mol%)无水MnCl2,继续搅拌反应1h后,停止反应。然后向三口瓶中加入5g水淬灭,再加10ml的二氯甲烷萃取,过滤,二氯甲烷冲洗滤饼,液体部分静置分相,收集有机相,减压蒸除溶剂,得到粗品,减压蒸馏得到白色固体2.1g。
经测定,白色固体为2,2’-联吡啶。
本发明并不局限于前述的具体实施方式。本发明扩展到任何在本说明书中披露的新特征或任何新的组合,以及披露的任一新的方法或过程的步骤或任何新的组合。

Claims (6)

1.一种2,2'-联吡啶的制备方法,其特征在于,以锰盐或钴盐作为催化剂,将2-氯吡啶格氏试剂和2-氯吡啶反应生成2,2'-联吡啶,反应方程式如下:
所述催化剂的摩尔量为2-氯吡啶格氏试剂摩尔量的1%~5%;
所述催化剂为二氯化锰、溴化锰、二氯化钴、醋酸钴中的一种或多种。
2.根据权利要求1所述的2,2'-联吡啶的制备方法,其特征在于,所述催化剂的摩尔量为2-氯吡啶格氏试剂摩尔量的3%。
3.根据权利要求1所述的2,2'-联吡啶的制备方法,其特征在于,所述2-氯吡啶格氏试剂的制备以及后续的偶联反应采用一锅法完成。
4.根据权利要求3所述的2,2'-联吡啶的制备方法,其特征在于,在制备时,2-氯吡啶的摩尔量是金属镁的1.6倍以上,格氏试剂制备完成后直接加入催化剂进行后续的偶联反应,得到2,2'-联吡啶。
5.根据权利要求3所述的2,2'-联吡啶的制备方法,其特征在于,所述格氏试剂的制备过程中,2-氯吡啶的摩尔量是金属镁的1.6-2倍,格氏试剂制备完成后直接加入催化剂进行后续的偶联反应,得到2,2'-联吡啶。
6.根据权利要求3-5任一项所述的2,2'-联吡啶的制备方法,其特征在于,所述格氏试剂在惰性气体条件下制备而成。
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