CN108018037A - 6,8-桥亚甲基四氢喹唑啉-2-胺席夫碱类铁离子荧光探针及其制备方法和应用 - Google Patents

6,8-桥亚甲基四氢喹唑啉-2-胺席夫碱类铁离子荧光探针及其制备方法和应用 Download PDF

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CN108018037A
CN108018037A CN201810015661.XA CN201810015661A CN108018037A CN 108018037 A CN108018037 A CN 108018037A CN 201810015661 A CN201810015661 A CN 201810015661A CN 108018037 A CN108018037 A CN 108018037A
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amine
methylene group
methylene
pyridine
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王石发
张燕
王忠龙
谷文
徐徐
杨益琴
姜倩
李明新
匡红波
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Abstract

本发明公开了6,8‑桥亚甲基四氢喹唑啉‑2‑胺席夫碱类铁离子荧光探针及其制备方法和应用。本发明利用β‑蒎烯衍生物7,7‑二甲基‑4‑苯基‑5,6,7,8‑四氢‑6,8‑桥亚甲基喹唑啉‑2‑胺原料,分别与吡啶‑2‑甲醛和吡啶‑4‑甲醛进行缩合反应,得到2个新型的6,8‑桥亚甲基四氢喹唑啉‑2‑胺席夫碱类衍生物:7,7‑二甲基‑4‑苯基‑N‑(吡啶‑2‑亚甲基)‑5,6,7,8‑四氢‑6,8‑桥亚甲基喹唑啉‑2‑胺(1)和7,7‑二甲基‑4‑苯基‑N‑(吡啶‑4‑亚甲基)‑5,6,7,8‑四氢‑6,8‑桥亚甲基喹唑啉‑2‑胺(2)。化合物(1)和(2)能与铁离子进行专一的络合,产生蓝色荧光的猝灭,因此可作为检测铁离子的荧光探针,具有良好的实用性。

Description

6,8-桥亚甲基四氢喹唑啉-2-胺席夫碱类铁离子荧光探针及 其制备方法和应用
技术领域
本发明属精细有机合成技术领域,涉及一种6,8-桥亚甲基四氢喹唑啉-2-胺席夫碱类铁离子荧光探针及其制备方法和应用。
背景技术
Fe3+是一种重要的金属离子,它广泛地分布于各种生命体及环境中,在人体的细胞代谢、酶反应、氧气运输、蛋白存储等方面扮演着至关重要的角色。游离的铁离子更是几乎分布于人体所有重要的组织当中,然而缺少或者过量的铁离子都会引起生理紊乱,例如贫血病、肝功能损伤和帕金森综合症等,因此对于Fe3+的专一以及灵敏性检测显得尤为重要。
近年,各种具有独特荧光特性的荧光基团作为母核已经成功用于构建Fe3+有机荧光探针,如:罗丹明,蒽,查尔酮、苯并咪唑等。但是还没有合成诺蒎酮吡啶席夫碱化合物并把它用于Fe3+离子检测的相关报道。
发明内容
发明目的:针对现有技术中存在的不足,本发明的目的在于提供一种6,8-桥亚甲基四氢喹唑啉-2-胺席夫碱类铁离子荧光探针,可专一性与Fe3+络合,并能产生蓝色荧光的有效猝灭,用于检测Fe3+的浓度。本发明的另一目的是提供一种上述6,8-桥亚甲基四氢喹唑啉-2-胺席夫碱类铁离子荧光探针的制备方法。本发明还有一目的是提供一种上述6,8-桥亚甲基四氢喹唑啉-2-胺席夫碱类铁离子荧光探针的应用。
技术方案:为实现上述发明目的,本发明采用的技术方案为:
6,8-桥亚甲基四氢喹唑啉-2-胺席夫碱类铁离子荧光探针,其特征在于,该类化合物的结构式为:
所述的6,8-桥亚甲基四氢喹唑啉-2-胺席夫碱类铁离子荧光探针的制备方法:以乙酸为催化剂,7,7-二甲基-4-苯基-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺分别与吡啶-2-甲醛和吡啶-4-甲醛进行缩合,对应得到7,7-二甲基-4-苯基-N-(吡啶-2-亚甲基)-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺和7,7-二甲基-4-苯基-N-(吡啶-4-亚甲基)-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺。
所述的7,7-二甲基-4-苯基-N-(吡啶-2-亚甲基)-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺的制备方法,包括以下步骤:
(1)将2.0mol 5,6,7,8-四氢-4-苯基-7,7-二甲基-6,8-桥亚甲基喹唑啉-2-胺、2.0~3.0mol吡啶2-甲醛、2.0~3.0mol乙酸和5~8L乙醇依次加入配有搅拌器、温度计和回流冷凝器的三口烧瓶中,加热回流反应20~30h,用LC-MS跟踪检测,至化合物不再转化,结束反应;
(2)反应物浓缩至1-2L,然后冷却至室温,放置2天后,析出淡黄色7,7-二甲基-4-苯基-N-(吡啶-2-亚甲基)-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺(1)。
所述的7,7-二甲基-4-苯基-N-(吡啶-4-亚甲基)-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺的制备方法,包括以下步骤:
(1)将2.0mol 5,6,7,8-四氢-4-苯基-7,7-二甲基-6,8-桥亚甲基喹唑啉-2-胺、2.0~3.0mol吡啶4-甲醛、2.0~3.0mol乙酸和5~8L乙醇依次加入配有搅拌器、温度计和回流冷凝器的三口烧瓶中,加热回流反应20~30h,用LC-MS跟踪检测,至化合物不再转化,结束反应;
(2)反应物浓缩至1-2L,然后冷却至室温,放置2天后,析出白色7,7-二甲基-4-苯基-N-(吡啶-4-亚甲基)-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺(2)。
所述的6,8-桥亚甲基四氢喹唑啉-2-胺席夫碱作为铁离子荧光探针的应用。
所述的应用,所述的7,7-二甲基-4-苯基-N-(吡啶-2-亚甲基)-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺(1)和7,7-二甲基-4-苯基-N-(吡啶-4-亚甲基)-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺(2)能专一性地与Fe3+离子络合,产生蓝色荧光的有效猝灭,可作为检测铁离子的荧光探针。
本发明以β-蒎烯衍生物5,6,7,8-四氢-4-苯基-7,7-二甲基-6,8-桥亚甲基喹唑啉-2-胺原料,分别与吡啶-2-甲醛和吡啶-4-甲醛进行缩合反应,得到6,8-桥亚甲基四氢喹唑啉-2-胺席夫碱类化合物7,7-二甲基-4-苯基-N-(吡啶-2-亚甲基)-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺(1)和7,7-二甲基-4-苯基-N-(吡啶-4-亚甲基)-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺(2)。化合物(1)和(2)能专一性的与Fe3+离子络合,在365nm紫外光下,产生蓝色荧光的猝灭,可作为检测Fe3+离子的荧光探针。
有益效果:与现有的研究成果相比,本发明的利用β-蒎烯衍生物7,7-二甲基-4-苯基-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺为原料制得的化合物7,7-二甲基-4-苯基-N-(吡啶-2-亚甲基)-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺(1)和7,7-二甲基-4-苯基-N-(吡啶-4-亚甲基)-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺(2)能选择性地与Fe3+离子络合,并导致蓝色荧光的猝灭,该化合物可作为专一性荧光探针用于检测Fe3+离子。
附图说明
图1是7,7-二甲基-4-苯基-N-(吡啶-2-亚甲基)-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺(1)不同的金属离子作用的荧光光谱结果图;
图2是7,7-二甲基-4-苯基-N-(吡啶-4-亚甲基)-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺(2)与不同的金属离子作用的荧光光谱结果图;
图3是7,7-二甲基-4-苯基-N-(吡啶-2-亚甲基)-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺(1)与不同浓度的铁离子作用的荧光光谱结果图;
图4是7,7-二甲基-4-苯基-N-(吡啶-4-亚甲基)-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺(2)与不同浓度的铁离子作用的荧光光谱结果图。
具体实施方式
下面结合具体实施例对本发明做进一步的说明。
实施例1
6,8-桥亚甲基四氢喹唑啉-2-胺席夫碱类化合物的制备方法为:
具体步骤如下:
6,8-桥亚甲基四氢喹唑啉-2-胺席夫碱类化合物的制备:
将2.0mmol 7,7-二甲基-4-苯基-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺,2.4mmol吡啶-2-甲醛、2.5mmol乙酸和60mL乙醇,依次加入配有搅拌器、温度计和回流冷凝器的三口烧瓶中,加热回流反应28h,用LC-MS跟踪检测,至化合物再转化,结束反应,反应物浓缩至8mL,然后冷却至室温,放置2天后,析出淡黄色晶体7,7-二甲基-4-苯基-N-(吡啶-2-亚甲基)-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺,为化合物(1),得率为42%。
对产物进行表征,数据如下:
mp:58.2-58.6℃;IR(KBr,cm-1):3420,2969,2921,2869,1566,1505,1440,1380,1121,1069,771,701,608;1H NMR(CDCl3,500MHz):0.77(s,3H,),1.24-1.28(t,J=6.5Hz,1H),1.40(s,3H),2.31(s,1H),2.59-2.65(m,1H),2.81-2.85(d,J=5.5Hz,1H),2.86-2.90(m,2H),6.54-6.60(t,J=7.9Hz,1H),7.44-7.58(m,5H),7.68-7.69(d,J=7.3Hz,2H),7.95(s,1H),8.58-8.59(d,J=6.1Hz,1H);13C NMR(CDCl3,125MHz):21.22,25.76,29.54,29.94,38.71,40.37,50.35,114.52,121.90,123.09,127.88,128.21,128.75,136.69,138.88,148.50,149.05,150.11,159.32,176.18,193.29;EI-MS(positive)m/z,calcd forC23H22N4:354.18,found:355.30([M+H]+);HRMS(m/z):[M+H]+calcd for C23H22N4+H+,355.1917;found,355.1914。
将2.1mmol 7,7-二甲基-4-苯基-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺,2.5mmol吡啶-4-甲醛、2.8mmol乙酸和60mL乙醇,依次加入配有搅拌器、温度计和回流冷凝器的三口烧瓶中,加热回流反应24h,用LC-MS跟踪检测,至化合物再转化,结束反应,反应物浓缩至7mL,然后冷却至室温,放置2天后,析出白色晶体7,7-二甲基-4-苯基-N-(吡啶-4-亚甲基)-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺,即为化合物(2),得率为56%。
对产物进行表征,数据如下:
mp:126.6-126.8℃;IR(KBr,cm-1):3427,3250,2969,2920,1566,1524,1406,1380,1335,1124,1069,800,701,615.1H NMR(CDCl3,500MHz):0.78(s,3H),1.25-1.28(t,J=5.6Hz,1H),1.40(s,3H),2.35(s,1H),2.64-2.66(t,J=4.0Hz,1H),2.81-2.84(t,J=4.4Hz,1H),2.87-2.90(m,2H),6.60-6.64(t,J=8.0Hz,1H),7.41-7.47(m,5H),7.67-7.69(d,J=5.5Hz,2H),8.58-8.59(t,J=3.6Hz,2H);13C NMR(CDCl3,125MHz):21.24,25.73,29.89,38.68,40.34,40.36,50.34,114.97,121.26,128.14,128.48,128.86,138.62,149.55,149.80,159.44,163.07,176.65;EI-MS(positive)m/z,calcd for C23H22N4:354.18,found:355.20([M+H+]).HRMS(m/z):[M+H]+calcd for C23H22N4+H+,355.1917;found,355.1915。
实施例2
将化合物(1)配制成1×10-4M的乙醇溶液,同样将各类的金属离子溶于乙醇中配成浓度为1×10-4M的溶液。测得不同的金属离子对化合物(1)的荧光发射光谱,如图1所示。结果表明,随着铁离子加入,体系的荧光强度明显降低,而通过加入等量的其他金属离子,如Mn2+,Zn2+,K+,Ni2+,Ca2+,Cd2+,Fe2+,Cu2+,Ag+,Co2+,Cr3+等离子对比观察,化合物的荧光光谱没有发生特别显著的改变,由此说明,该化合物可以作为特异性识别铁离子的荧光探针。
将化合物(2)配制成1×10-4M的乙醇溶液,同样将各类的金属离子溶于乙醇中配成浓度为1×10-4M的溶液。测得不同的金属离子对化合物(2)的荧光光谱,如图2所示。结果表明,相比于其他金属离子,铁离子能够引起化合物荧光光谱的明显改变,由此说明,该化合物可以在众多的金属离子中选择性的识别铁离子。
实施例3
将化合物(1)配制成1×10-4M的乙醇溶液,将铁离子溶于乙醇溶液中配成浓度为0~2.4×10-4M的溶液。测得不同浓度的铁离子对化合物(1)的荧光发射光谱,如图3所示。结果表明,随着体系中铁离子浓度的不断增加,化合物的荧光强度随之降低,由此说明,该化合物可以作为灵敏性检测铁离子的荧光探针。
将化合物(2)配制成1×10-4M的乙醇溶液,将铁离子溶于乙醇溶液中配成浓度为0~2.4×10-4M的溶液。测得不同浓度的铁离子对化合物(2)的荧光光谱,如图4所示。结果表明,在铁离子浓度不断增加的过程中,化合物的荧光强度反而不断地减小,直至完全猝灭,说明该化合物可以灵敏的检测溶液中的铁离子浓度。

Claims (6)

1.6,8-桥亚甲基四氢喹唑啉-2-胺席夫碱类铁离子荧光探针,其特征在于,该类化合物的结构式为:
2.权利要求1所述的6,8-桥亚甲基四氢喹唑啉-2-胺席夫碱类铁离子荧光探针的制备方法,其特征在于:以乙酸为催化剂,7,7-二甲基-4-苯基-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺分别与吡啶-2-甲醛和吡啶-4-甲醛进行缩合,对应得到7,7-二甲基-4-苯基-N-(吡啶-2-亚甲基)-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺和7,7-二甲基-4-苯基-N-(吡啶-4-亚甲基)-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺。
3.根据权利要求2所述的6,8-桥亚甲基四氢喹唑啉-2-胺席夫碱类铁离子荧光探针的制备方法,其特征在于,包括以下步骤:
(1)将2.0mol 5,6,7,8-四氢-4-苯基-7,7-二甲基-6,8-桥亚甲基喹唑啉-2-胺、2.0~3.0mol吡啶2-甲醛、2.0~3.0mol乙酸和5~8L乙醇依次加入配有搅拌器、温度计和回流冷凝器的三口烧瓶中,加热回流反应20~30h,用LC-MS跟踪检测,至化合物不再转化,结束反应;
(2)反应物浓缩至1-2L,然后冷却至室温,放置2天后,析出淡黄色7,7-二甲基-4-苯基-N-(吡啶-2-亚甲基)-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺(1)。
4.根据权利要求2所述的6,8-桥亚甲基四氢喹唑啉-2-胺席夫碱类铁离子荧光探针的制备方法,其特征在于,包括以下步骤:
(1)将2.0mol 5,6,7,8-四氢-4-苯基-7,7-二甲基-6,8-桥亚甲基喹唑啉-2-胺、2.0~3.0mol吡啶4-甲醛、2.0~3.0mol乙酸和5~8L乙醇依次加入配有搅拌器、温度计和回流冷凝器的三口烧瓶中,加热回流反应20~30h,用LC-MS跟踪检测,至化合物不再转化,结束反应;
(2)反应物浓缩至1-2L,然后冷却至室温,放置2天后,析出白色7,7-二甲基-4-苯基-N-(吡啶-4-亚甲基)-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺(2)。
5.权利要求1所述的6,8-桥亚甲基四氢喹唑啉-2-胺席夫碱作为铁离子荧光探针的应用。
6.根据权利要求5所述的应用,所述的7,7-二甲基-4-苯基-N-(吡啶-2-亚甲基)-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺(1)和7,7-二甲基-4-苯基-N-(吡啶-4-亚甲基)-5,6,7,8-四氢-6,8-桥亚甲基喹唑啉-2-胺(2)能专一性地与Fe3+离子络合,产生蓝色荧光的有效猝灭,可作为检测铁离子的荧光探针。
CN201810015661.XA 2018-01-08 2018-01-08 6,8-桥亚甲基四氢喹唑啉-2-胺席夫碱类铁离子荧光探针及其制备方法和应用 Expired - Fee Related CN108018037B (zh)

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