CN110818628B - 一种含氮芳香二羧酸的制备方法 - Google Patents

一种含氮芳香二羧酸的制备方法 Download PDF

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CN110818628B
CN110818628B CN201911087341.6A CN201911087341A CN110818628B CN 110818628 B CN110818628 B CN 110818628B CN 201911087341 A CN201911087341 A CN 201911087341A CN 110818628 B CN110818628 B CN 110818628B
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oxone
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杨洋
付任重
王欣
方正姣
陆正义
曾小君
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Changshu Institute of Technology
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    • 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
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Abstract

本发明公开了一种含氮芳香二羧酸的制备方法,它以喹啉、异喹啉、苯并咪唑或苯并三氮唑及其衍生物为原料,以oxone为氧化剂,金属盐为催化剂,无机酸为介质,加入相转移试剂,反应得到含氮芳香二羧酸。该方法所用试剂稳定性高,便于运输和储存,操作简单,条件容易控制,价格便宜,同时催化效果好、收率较高、废液处理容易,便于工业化大规模生产。

Description

一种含氮芳香二羧酸的制备方法
技术领域
本发明属有机合成化学技术领域,具体涉及一种含氮芳香二羧酸的制备方法。
背景技术
含氮芳香二羧酸是一种重要的精细化工原料,主要用于农药、医药和染料等行业。例如,2,3-吡啶二羧酸可用于合成含吡啶或喹啉环的咪唑啉酮类除草剂(如灭草烟),也可以用于合成抗生素(如抗分支杆菌喹诺酮);3,4-吡啶二羧酸是合成蒽二酮类抗肿瘤药;4,5-咪唑二羧酸用于合成头孢咪唑等原料药;1,2,3-三氮唑-4,5-二羧酸是重要的医药和材料中间体等。近年来,其应用日趋广泛,需求量也日益增多。
目前,合成含氮芳香二羧酸最主要的方法是氧化法,通常以喹啉、异喹啉、苯并咪唑或苯并三氮唑及其衍生物等为原料,以重铬酸盐、高锰酸钾、双氧水、臭氧、氯酸钠、硫酸、硝酸或氧气等为氧化剂。然而这些氧化方法都存在一些缺点,例如,重铬酸盐氧化后生成铬类重金属污染;高锰酸钾氧化法反应剧烈,选择性低,产生较多的“锰泥”对环境污染严重;双氧水氧化法和次氯酸氧化法的缺点是反应温度较高,反应不容易控制,易发生喷料或爆炸;臭氧氧化法和电化学氧化法的缺点是反应需要特殊的装置,成本较高;氯酸钠不稳定,受撞击时易发生燃烧和爆炸;硫酸和硝酸氧化法产率较低,对设备腐蚀严重;空气或氧气氧化法的缺点是反应温度较高,产物容易分解等。因此,开发其简便、高效、操作安全、废液处理容易的氧化合成工艺,具有极其重要的意义。
发明内容
针对上述问题,本发明提供了一种氧化法制备含氮芳香二羧酸的方法。本发明通过以喹啉、异喹啉、苯并咪唑或苯并三氮唑及其衍生物等为原料,以oxone(过硫酸氢钾复合盐)为氧化剂,金属盐为催化剂,无机酸为介质,加入相转移试剂,反应得到含氮芳香二羧酸,该方法所用试剂稳定性高,便于运输和储存,操作简单,条件易控制,价格便宜,同时催化效果好、收率较高、废液处理容易。
一种含氮芳香二羧酸的制备方法,包括如下步骤:
(1)向反应釜中投入水,开启搅拌,依次加入金属盐催化剂,无机酸,相转移试剂,喹啉、异喹啉、苯并咪唑或苯并三氮唑及其衍生物,升温;
(2)反应温度达到目标反应温度时,分批加入oxone氧化剂,加完后保温反应一定时间;
(3)反应完毕后,降温至-10℃~10℃,搅拌下缓慢滴加无机碱调节pH值=0.6~1,然后继续保温搅拌0.5~2h,抽滤,干燥,得到含氮芳香二羧酸产物。
较佳的,本发明采用的金属盐包括硝酸铁、硝酸亚铁、硫酸铁、硫酸亚铁、氯化铁、氯化亚铁、硝酸铜、硫酸铜、氯化铜中的任一种。
较佳的,本发明采用的无机酸包括硝酸、硫酸、磷酸中的任一种。
较佳的,本发明采用的相转移试剂包括多烷基卤化铵、多烷基硫酸铵、多烷基硫酸氢铵、多烷基氢氧化铵、烷基磺酸钠中的任一种。
较佳的,本发明采用的喹啉、异喹啉、苯并咪唑或苯并三氮唑及其衍生物包括喹啉、2-甲基喹啉、3-甲基喹啉、4-甲基喹啉、异喹啉、1-甲基异喹啉、3-甲基异喹啉、4-甲基异喹啉、苯并咪唑、2-甲基苯并咪唑、苯并三氮唑中的任一种。
较佳的,本发明采用的无机碱包括氨水、氢氧化钠、碳酸钠、碳酸氢钠、氢氧化钾、碳酸钾、碳酸氢钾中的任一种,其中优选采用氨水。
较佳的,所述的原料喹啉、异喹啉、苯并咪唑或苯并三氮唑及其衍生物与oxone氧化剂中活性氧的摩尔比为1:1.0~4.0,金属盐催化剂的用量为原料喹啉、异喹啉、苯并咪唑或苯并三氮唑及其衍生物的0.2mol%~1mol%,相转移试剂用量为原料喹啉、异喹啉、苯并咪唑或苯并三氮唑及其衍生物的0.2mol%~1mol%。
较佳的,所述的目标反应温度为30~100℃;时间为4~20h。
与现有技术相比,本发明的有益效果是:(1)本发明中所用试剂稳定性高,安全隐患较小,便于运输和储存。(2)本发明方法与现有技术相比具有工艺操作简单,条件易控制,价格便宜,同时催化效果好、收率较高、废液处理容易,便于工业化大规模生产。
具体实施方式
以下通过实施例进一步说明本发明,但专利权利并不局限于这些实施例。
本发明所述的含氮芳香二羧酸的制备方法包括以下步骤:
(1)向反应釜中投入水,开启搅拌,依次加入金属盐催化剂,无机酸,相转移试剂,喹啉、异喹啉、苯并咪唑或苯并三氮唑及其衍生物,并升温;
(2)反应温度达到30~100℃时,分批加入oxone氧化剂,加完后保温反应4~20h;
(3)反应完毕后,降温至-10℃~10℃,搅拌下缓慢滴加无机碱调节pH值=0.6~1,然后继续保温搅拌0.5~2h,抽滤,干燥,得到含氮芳香二羧酸产物,滤液可用于进一步回收产物。
实施例1
以喹啉为原料制备2,3-吡啶二羧酸中使用不同种类氧化剂的对比实验,实验分为八组,每组加入不同种类的氧化剂
A组:H2O2(30%水溶液)
B组:CH3CO3H(20%乙酸溶液)
C组:mCPBA
D组:TBHP(70%水溶液)
E组:oxone(活性氧≥4.50%)
F组:KMnO4
G组:NaClO3
H组:K2Cr2O7
具体实验方法如下:(1)向反应釜中投入水30g,开启搅拌,依次加入Fe(NO3)3.9H2O0.03g,58%硝酸15g,四丁基溴化胺0.03g,喹啉2.5g,并升温;
(2)反应温度达到60℃时,分批加入分别A-H组的氧化剂,加完后保温反应16h;
(3)反应完毕后,降温至-10~10℃,搅拌下缓慢滴加浓氨水调节pH值=0.6~1,然后继续保温搅拌0.5h,抽滤,干燥,得到2,3-吡啶二羧酸,滤液可用于进一步回收产物。
表1不同种类氧化剂的对比实验结果
Figure BDA0002265820970000031
Figure BDA0002265820970000041
由表1的数据可以得出以下结论:在所选的A-H组的氧化剂中oxone的氧化效果最好。另外,虽然H2O2、KMnO4和K2Cr2O7的也具有一定氧化活性,但是由于双氧水氧化反应不容易控制,易发生喷料或爆炸;高锰酸钾氧化反应选择性低,产生较多的“锰泥”对环境污染严重;重铬酸盐氧化后生成铬类重金属污染等缺点,因此oxone是本发明中优选的氧化剂。
实施例2
以喹啉为原料制备2,3-吡啶二羧酸中不同加入量oxone的对比实验,实验分为五组,每组加入不量的oxone
A组:oxone 7.5g
B组:oxone 15g
C组:oxone 22.5g
D组:oxone 30g
E组:oxone 37.5g
具体实验方法如下:(1)向反应釜中投入水30g,开启搅拌,依次加入Fe(NO3)3.9H2O0.03g,58%硝酸15g,四丁基溴化胺0.03g,喹啉2.5g,并升温;
(2)反应温度达到60℃时,分批加入分别A-E组的oxone,加完后保温反应16h;
(3)反应完毕后,降温至-10~10℃,搅拌下缓慢滴加浓氨水调节pH值=0.6~1,然后继续保温搅拌0.5h,抽滤,干燥,得到2,3-吡啶二羧酸,滤液可用于进一步回收产物。
表2不同加入量的oxone氧化剂的对比实验结果
Figure BDA0002265820970000042
Figure BDA0002265820970000051
由表2的数据可以得出以下结论:在喹啉为原料制备2,3-吡啶二羧酸中B组加入量的oxone能够达到最佳的氧化效果,减少或者增加氧化剂都不能够得到更好的结果。
实施例3
以喹啉为原料制备2,3-吡啶二羧酸中不同的无机酸的对比实验,实验分为三组,每组加入不量的无机酸
A组:58wt%硝酸15g
B组:浓硫酸15g
C组:浓磷酸15g
具体实验方法如下:(1)向反应釜中投入水30g,开启搅拌,依次加入Fe(NO3)3.9H2O0.03g,分别A-C组的无机酸,四丁基溴化胺0.03g,喹啉2.5g,并升温;
(2)反应温度达到60℃时,分批加入oxone 15g,加完后保温反应16h;
(3)反应完毕后,降温至-10~10℃,搅拌下缓慢滴加浓氨水调节pH值=0.6~1,然后继续保温搅拌0.5h,抽滤,干燥,得到2,3-吡啶二羧酸,滤液可用于进一步回收产物。
表3加入不同无机酸的对比实验结果
组别 不同加入量氧化剂 产率
A组 58%硝酸15g 71%
B组 浓硫酸15g 73%
C组 浓磷酸15g 68%
由表3的数据可以得出以下结论:无机强酸做为反应介质对反应产率影响是非常明显。
实施例4
以喹啉为原料制备2,3-吡啶二羧酸中使用不同反应温度的对比实验,实验分为八组,每组采用不同的反应温度
A组:30℃
B组:40℃
C组:50℃
D组:60℃
E组:70℃
F组:80℃
G组:90℃
H组:100℃
具体实验方法如下:(1)向反应釜中投入水30g,开启搅拌,依次加入Fe(NO3)3.9H2O0.03g,58%硝酸15g,四丁基溴化胺0.03g,喹啉2.5g,并升温;
(2)反应温度分别达到A-H组的温度时,分批加入oxone 15g,加完后保温反应16h;
(3)反应完毕后,降温至-10~10℃,搅拌下缓慢滴加浓氨水调节pH值=0.6~1,然后继续保温搅拌0.5h,抽滤,干燥,得到2,3-吡啶二羧酸,滤液可用于进一步回收产物。
表4不同反应温度的对比实验结果
Figure BDA0002265820970000061
Figure BDA0002265820970000071
由表4的数据可以得出以下结论:反应温度对反应收率有一定影响,60℃~80℃是本发明中喹啉为原料制备2,3-吡啶二羧酸的优选的温度。2,3-吡啶二羧酸。1H NMR(400MHz,DMSO-d6)δ13.56(s,2H),8.75-8.73(m,1H),8.26-8.23(m,1H),7.64-7.61(m,1H).。
实施例5
(1)向反应釜中投入水30g,开启搅拌,依次加入Fe(NO3)3.9H2O 0.06g,96%硫酸15g,四丁基溴化胺0.03g,喹啉2.5g,并升温;
(2)反应温度达到80℃时,分批加入oxone 15g,加完后保温反应4h;
(3)反应完毕后,降温至-10~10℃,搅拌下缓慢滴加浓氨水调节pH值=0.6~1,然后继续搅拌1h,抽滤,干燥,得到2,3-吡啶二羧酸,滤液可用于进一步回收产物,产率78%。1H NMR(400M Hz,DMSO-d6)δ13.56(s,2H),8.75-8.73(m,1H),8.26-8.23(m,1H),7.64-7.61(m,1H).。
实施例6
(1)向反应釜中投入水30g,开启搅拌,依次加入Fe(NO3)3.9H2O 0.06g,58%硝酸15g,四丁基溴化胺0.03g,3-甲基喹啉2.75g,并升温;
(2)反应温度达到100℃时,分批加入oxone 20g,加完后保温反应16h;
(3)反应完毕后,降温至-10~10℃,搅拌下缓慢滴加浓氨水调节pH值=0.6~1,然后继续搅拌2h,抽滤,干燥,得到5-甲基-2,3-吡啶二羧酸,滤液可用于进一步回收产物,产率65%。1H NMR(400M Hz,DMSO-6d)δ2.38(s,3H),8.03(d,1H),8.57(d,1H),12.3-14.0(brs,2H).。
实施例7:
(1)向反应釜中投入水30g,开启搅拌,依次加入Fe(NO3)3.9H2O 0.06g,58%硝酸15g,四丁基溴化胺0.03g,2-甲基喹啉2.75g,并升温;
(2)反应温度达到90℃时,分批加入oxone 20g,加完后保温反应16h;
(3)反应完毕后,降温至-10~10℃,搅拌下缓慢滴加浓氨水调节pH值=0.6~1,然后继续搅拌2h,抽滤,干燥,得到6-甲基-2,3-吡啶二羧酸,滤液可用于进一步回收产物,产率69%。1H NMR(400M Hz,DMSO-6d)δ2.51(s,3H),8.03(d,1H),8.67(d,1H),12.5-14.1(brs,2H).。
实施例8:
(1)向反应釜中投入水30g,开启搅拌,依次加入Fe(NO3)3.9H2O 0.06g,58%硝酸15g,四丁基溴化胺0.03g,4-甲基喹啉2.75g,并升温;
(2)反应温度达到90℃时,分批加入oxone 25g,加完后保温反应16h;
(3)反应完毕后,降温至-10~10℃,搅拌下缓慢滴加浓氨水调节pH值=0.6~1,然后继续搅拌1h,抽滤,干燥,得到4-甲基-2,3-吡啶二羧酸,滤液可用于进一步回收产物,产率69%。1H NMR(400M Hz,DMSO-6d)δ2.59(s,3H),8.05(d,1H),8.99(d,1H),12.2-13.8(brs,2H).。
实施例9:
(1)向反应釜中投入水30g,开启搅拌,依次加入Fe(NO3)3.9H2O 0.06g,96%硫酸15g,四丁基溴化胺0.03g,异喹啉2.5g,并升温;
(2)反应温度达到60℃时,分批加入oxone 20g,加完后保温反应16h;
(3)反应完毕后,降温至-10~10℃,搅拌下缓慢滴加浓氨水调节pH值=0.6~1,然后继续搅拌1h,抽滤,干燥,得到3,4-吡啶二羧酸,滤液可用于进一步回收产物,产率71%。1H NMR(400M Hz,DMSO-6d)δ7.60(d,1H),8.81(d,1H),8.96(s,1H),12.8-13.7(s,2H).。
实施例10:
(1)向反应釜中投入水30g,开启搅拌,依次加入Fe(NO3)3.9H2O 0.06g,96%硫酸15g,四丁基溴化胺0.03g,1-甲基异喹啉2.75g,并升温;
(2)反应温度达到100℃时,分批加入oxone 25g,加完后保温反应16h;
(3)反应完毕后,降温至-10~10℃,搅拌下缓慢滴加浓氨水调节pH值=0.6~1,然后继续搅拌2h,抽滤,干燥,得到2-甲基-3,4-吡啶二羧酸,滤液可用于进一步回收产物,产率61%。1H NMR(400M Hz,DMSO-6d)δ2.56(s,3H),7.60(d,1H),9.11(d,1H),12.9-14.0(s,2H).。
实施例11:
(1)向反应釜中投入水30g,开启搅拌,依次加入FeCl3 0.06g,96%硫酸15g,四丁基溴化胺0.03g,3-甲基异喹啉2.75g,并升温;
(2)反应温度达到100℃时,分批加入oxone 25g,加完后保温反应16h;
(3)反应完毕后,降温至-10~10℃,搅拌下缓慢滴加浓氨水调节pH值=0.6~1,然后继续搅拌2h,抽滤,干燥,得到6-甲基-3,4-吡啶二羧酸,滤液可用于进一步回收产物,产率61%。1H NMR(400M Hz,DMSO-6d)δ2.50(s,3H),8.00(d,1H),9.18(d,1H),12.3-13.6(s,2H).。
实施例12:
(1)向反应釜中投入水30g,开启搅拌,依次加入FeCl3 0.06g,浓磷酸20g,四丁基溴化胺0.03g,4-甲基异喹啉2.75g,并升温;
(2)反应温度达到100℃时,分批加入oxone 25g,加完后保温反应14h;
(3)反应完毕后,降温至-10~10℃,搅拌下缓慢滴加浓氨水调节pH值=0.6~1,然后继续搅拌2h,抽滤,干燥,得到5-甲基-3,4-吡啶二羧酸,滤液可用于进一步回收产物,产率66%。1H NMR(400M Hz,DMSO-6d)δ2.42(s,3H),9.01(d,1H),9.38(d,1H),12.88-13.78(s,2H).。
实施例13:
(1)向反应釜中投入水30g,开启搅拌,依次加入Cu(NO3)2 0.03g,58%硝酸15g,四丁基溴化胺0.03g,喹啉2.5g,并升温;
(2)反应温度达到50℃时,分批加入oxone 15g,加完后保温反应16h;
(3)反应完毕后,降温至-10~10℃,搅拌下缓慢滴加浓氨水调节pH值=0.6~1,然后继续搅拌0.5h,抽滤,干燥得到2,3-吡啶二羧酸,滤液可用于进一步回收产物,产率65%。1H NMR(400M Hz,DMSO-6d)δ13.56(s,2H),8.75-8.73(m,1H),8.26-8.23(m,1H),7.64-7.61(m,1H).。
实施例14:
(1)向反应釜中投入水30g,开启搅拌,依次加入Fe(NO3)3.9H2O 0.05g,Cu(NO3)20.01g,58%硝酸15g,四丁基溴化胺0.03g,喹啉2.5g,并升温;
(2)反应温度达到60℃时,分批加入oxone 20g,加完后保温反应10h;
(3)反应完毕后,降温至-10~10℃,搅拌下缓慢滴加浓氨水调节pH值=0.6~1,然后继续搅拌1h,抽滤,干燥,得到2,3-吡啶二羧酸,滤液可用于进一步回收产物,产率76%。1H NMR(400M Hz,DMSO-6d)δ13.56(s,2H),8.75-8.73(m,1H),8.26-8.23(m,1H),7.64-7.61(m,1H).。
实施例15:
(1)向反应釜中投入水30g,开启搅拌,依次加入Fe(NO3)3.9H2O 0.06g,四丁基氟化胺0.03g,58%硝酸15g,喹啉2.5g,并升温;
(2)反应温度达到50℃时,分批加入oxone 15g,加完后保温反应16h;
(3)反应完毕后,降温至-10~10℃,搅拌下缓慢滴加浓氨水调节pH值=0.6~1,然后继续搅拌0.5h,抽滤,干燥,得到2,3-吡啶二羧酸,滤液可用于进一步回收产物,产率70%。1H NMR(400M Hz,DMSO-6d)δ13.56(s,2H),8.75-8.73(m,1H),8.26-8.23(m,1H),7.64-7.61(m,1H).。
实施例16:
(1)向反应釜中投入水30g,开启搅拌,依次加入FeSO4 0.06g,58%硝酸15g,十二烷基磺酸钠0.03g,4-甲基喹啉2.75g,并升温;
(2)反应温度达到95℃时,分批加入oxone 25g,加完后保温反应12h;
(3)反应完毕后,降温至-10~10℃,搅拌下缓慢滴加浓氨水调节pH值=0.6~1,然后继续搅拌2h,抽滤,干燥,得到4-甲基-2,3-吡啶二羧酸,滤液可用于进一步回收产物,产率73%。1H NMR(400M Hz,DMSO-6d)δ2.59(s,3H),8.05(d,1H),8.99(d,1H),12.2-13.8(brs,2H).。
实施例17:
(1)向反应釜中投入水30g,开启搅拌,依次加入CuSO4 0.06g,96%硫酸15g,四丁基硫酸氢铵0.03g,1-甲基异喹啉2.75g,并升温;
(2)反应温度达到80℃时,分批加入oxone 25g,加完后保温反应16h;
(3)反应完毕后,降温至-10~10℃,搅拌下缓慢滴加浓氨水调节pH值=0.6~1,然后继续搅拌2h,抽滤,干燥,得到2-甲基-3,4-吡啶二羧酸,滤液可用于进一步回收产物,产率65%。1H NMR(400M Hz,DMSO-6d)δ2.56(s,3H),7.60(d,1H),9.11(d,1H),12.9-14.0(s,2H).。
实施例18:
(1)向反应釜中投入水30g,开启搅拌,依次加入Fe(NO3)3.9H2O 0.03g,58%硝酸15g,四丁基溴化胺0.03g,苯并咪唑2.5g,并升温;
(2)反应温度达到60℃时,开始分批加入oxone 20g,加完后保温反应16h;
(3)反应完毕后,降温至-10~10℃,搅拌下缓慢滴加浓氨水调节pH值=0.6~1,然后继续搅拌0.5h,抽滤,干燥,得到4,5-咪唑二羧酸,滤液可用于进一步回收产物,产率68%。1H NMR(400M Hz,DMSO-6d)δ10.02(brs,2H),8.81(s,1H).。
实施例19:
(1)向反应釜中投入水30g,开启搅拌,依次加入Fe(NO3)3.9H2O 0.06g,96%硫酸15g,四丁基溴化胺0.03g,苯并咪唑2.5g,并升温;
(2)反应温度达到80℃时,分批加入oxone 20g,加完后保温反应8h;
(3)反应完毕后,开始降温至-10~10℃,搅拌下缓慢滴加浓氨水调节pH值=0.6~1,然后继续搅拌1h析晶,抽滤,干燥,得到4,5-咪唑二羧酸,滤液可用于进一步回收产物,产率73%。1H NMR(400M Hz,DMSO-6d)δ10.02(brs,2H),8.81(s,1H).。
实施例20:
(1)向反应釜中投入水30g,开启搅拌,依次加入Fe(NO3)3.9H2O 0.06g,58%硝酸15g,四丁基溴化胺0.03g,2-甲基苯并咪唑2.8g并升温;
(2)反应温度达到100℃时,分批加入oxone 20g,加完后保温反应20h;
(3)反应完毕后,开始降温至-10~10℃,搅拌下缓慢滴加浓氨水调节pH值=0.6~1,然后继续搅拌2h析晶,抽滤,干燥,得到2-甲基咪唑-4,5-二羧酸,滤液可用于进一步回收产物,产率71%。1H NMR(400M Hz,DMSO-6d)δ10.15(brs,2H),8.76(s,1H),2.52(s,3H).。
实施例21:
(1)向反应釜中投入水30g,开启搅拌,依次加入Fe(NO3)3.9H2O 0.06g,96%硫酸15g,四丁基溴化胺0.03g,苯并三氮唑2.5g并升温;
(2)反应温度达到80℃时,分批加入oxone 20g,加完后保温反应20h;
(3)反应完毕后,开始降温至-10~10℃,搅拌下缓慢滴加浓氨水调节pH值=0.6~1,然后继续搅拌2h析晶,抽滤,干燥,得到1,2,3-三唑-4,5-二羧酸,滤液可用于进一步回收产物,产率78%。1H NMR(400M Hz,DMSO-6d)δ10.88(brs,2H);13C NMR(75M Hz,DMSO-6d)δ162.5,138.3.。
实施例22:
(1)向反应釜中投入水30g,开启搅拌,依次加入Cu(NO3)2 0.03g,58%硝酸15g,四丁基溴化胺0.03g,苯并咪唑2.5g并升温;
(2)反应温度达到80℃时,分批加入oxone 20g,加完后保温反应16h;
(3)反应完毕后,开始降温至-10~10℃,搅拌下缓慢滴加浓氨水调节pH值=0.6~1,然后继续搅拌0.5h析晶,抽滤,干燥,得到4,5-咪唑二羧酸,滤液可用于进一步回收产物,产率68%。1H NMR(400M Hz,DMSO-6d)δ10.02(brs,2H),8.81(s,1H).。
实施例23:
(1)向反应釜中投入水30g,开启搅拌,依次加入Fe(NO3)3.9H2O 0.05g,Cu(NO3)20.01g,58%硝酸15g,四丁基溴化胺0.03g,苯并咪唑2.5g并升温;
(2)反应温度达到100℃时,分批加入oxone 20g,加完后保温反应16h;
(3)反应完毕后,降温至-10~10℃,搅拌下缓慢滴加浓氨水调节pH值=0.6~1,然后继续搅拌1h析晶,抽滤,干燥,得到4,5-咪唑二羧酸,滤液可用于进一步回收产物,产率71%。1H NMR(400M Hz,DMSO-6d)δ10.02(brs,2H),8.81(s,1H).。
实施例24:
(1)向反应釜中投入水30g,开启搅拌,依次加入Fe(NO3)3.9H2O 0.06g,98%硫酸15g,四丁基氟化胺0.03g,苯并咪唑2.5g并升温;
(2)反应温度达到50℃时,分批加入oxone 20g,加完后保温反应16h;
(3)反应完毕后,开始降温至-10~10℃,搅拌下缓慢滴加浓氨水调节pH值=0.6~1,然后继续搅拌1h析晶,抽滤,干燥,得到4,5-咪唑二羧酸,滤液可用于进一步回收产物,产率66%。1H NMR(400M Hz,DMSO-6d)δ10.02(brs,2H),8.81(s,1H).。

Claims (5)

1.一种含氮芳香二羧酸的制备方法,其特征在于,以喹啉、异喹啉、苯并咪唑或苯并三氮唑及其衍生物为原料,以oxone为氧化剂,金属盐为催化剂,无机酸为介质,加入相转移试剂,反应得到含氮芳香二羧酸;
其中,金属盐为硝酸铁、硫酸亚铁、氯化铁、硝酸铜、硫酸铜中的任意一种;
无机酸为58wt%硝酸、浓硫酸、浓磷酸中的任意一种;
相转移试剂为四丁基溴化铵、四丁基氟化铵、十二烷基磺酸钠、四丁基硫酸氢铵中的任意一种;
衍生物为2-甲基喹啉、3-甲基喹啉、4-甲基喹啉、1-甲基异喹啉、3-甲基异喹啉、4-甲基异喹啉、2-甲基苯并咪唑中的任意一种。
2.如权利要求1所述的方法,其特征在于,原料与氧化剂中活性氧的摩尔比为1:1.0~4.0。
3.如权利要求1所述的方法,其特征在于,催化剂用量为原料的0.2mol%~1mol%。
4.如权利要求1所述的方法,其特征在于,相转移试剂用量为原料的0.2mol%~1mol%。
5.如权利要求1所述的方法,其特征在于,反应温度为30~100℃,反应时间为4~20h。
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