CN105777591A - 一种姜黄素衍生物及其制备和在检测苯硫酚中的应用 - Google Patents
一种姜黄素衍生物及其制备和在检测苯硫酚中的应用 Download PDFInfo
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Abstract
本发明提供了一种姜黄素衍生物及其制备和在检测苯硫酚中的应用,所述姜黄素衍生物,名称为bis(2,4‑dinitrobenzenesulfonate)‑curcumin,缩写为DNSC;所述苯硫酚包括苯硫酚衍生物。本发明提供了快速检测苯硫酚及其衍生物的方法,是基于姜黄素衍生物DNSC,在HEPES/MeOH(v/v,1:1,pH 7.4)溶液中定量地检测苯硫酚或其衍生物的含量。DNSC对苯硫酚及其衍生物显示了高的灵敏性和选择性,检测方法过程简便、灵敏、快速,检测结果准确。
Description
技术领域:
本发明涉及苯硫酚及其衍生物检测分析技术,具体涉及一种姜黄素衍生物及其制备方法和在检测苯硫酚(包括苯硫酚衍生物)中的应用。
背景技术:
苯硫酚及其衍生物是一类具有活性巯基的高毒性芳香类化合物,其广泛应用于农药、医药生产和高分子聚合物合成。报道表明,苯硫酚在鱼类体内的半数致死浓度为0.01-0.4mM(Hell,T.P.,Lindsay,R.C.Toxicologicalpropertiesofthio-andalkylphenolscausingflavortaintinginfishfromtheupperWisconsinRiver[J].J.Environ.Sci.HealthB,1989,24,349360;Amrolia,P.,Sullivan,S.G.,Stern,A.,Munday,R.Toxicityofaromaticthiolsinthehumanredbloodcell[J].J.Appl.Toxicol.,1989,9,113-118)。人体暴露于苯硫酚蒸气中会引起包括中枢神经系统损伤、肢体麻痹、昏迷甚至死亡等一系列严重机体损害(R.Munday,Toxicityofaromaticdisulphides.I.Generationofsuperoxideradicalandhydrogenperoxidebyaromaticdisulphidesinvitro[J].J.Appl.Toxicol.,1985,5,402-408)。目前,苯硫酚及其衍生物已被美国环境保护局列为严重污染物。快速、准确地检测样品中的苯硫酚及其衍生物的含量对于环境监测和生物体健康评估具有极其重要的意义。
荧光探针对苯硫酚衍生物的检测识别广受化学工作者重视。济南大学林伟英教授于2010年最早报道了具有二硝基苯酚醚结构的荧光探针对苯硫酚的识别检测,但该探针受到脂肪族硫醇Cys、Hcy等的干扰(Lin,W.Y.,Long,L.L.,Tan,W.Ahighlysensitivefluorescentprobefordetectionofbenzenethiolsinenvironmentalsamplesandlivingcells.Chem.Commun.,2010,46,1503–1505)。后来,新墨西哥大学Wang教授报道的利用2,4-二硝基苯磺酰胺基团实现了荧光探针对苯硫酚及其衍生物的特异识别(Jiang,W.,Cao,Y.T.Liu,Y.Wang,W.RationaldesignofahighlyselectiveandsensitivefluorescentPETprobefordiscriminationofthiophenolsandaliphaticthiols.Chem.Commun.,2010,46,1944–1946)。但此结构对苯硫酚的识别检测存在着反应过慢的缺陷(通常反应时间处于20-30min之间),这给易被氧化的苯硫酚的检测带来了不可避免的误差。
针对此现状,我们利用活性较高的2,4-二硝基苯磺酰酯作为识别位点,设计合成了一种姜黄素衍生物DNSC(bis(2,4-dinitrobenzenesulfonate)-curcumin)用于苯硫酚及其衍生物的特异荧光识别检测。该探针对苯硫酚及其衍生物的检测是基于苯硫酚活性巯基对2,4-二硝基苯磺酰酯反应单元的芳香亲核取代(SNAr)过程。
发明内容:
本发明的目的是提供一种姜黄素衍生物及其制备方法,该衍生物可作为检测试剂用于定量检测苯硫酚及其衍生物;在检测苯硫酚及其衍生物时选择性高,响应速度快。
本发明提供的一种姜黄素衍生物,名称为bis(2,4-dinitrobenzenesulfonate)-curcumin,缩写为DNSC,结构式为:
姜黄素衍生物对苯硫酚及其衍生物显示了优良的灵敏性和选择性,检测过程简便、灵敏、快速,检测结果准确。
DNSC的制备:将姜黄素、三乙胺溶于氯仿中,搅拌回流10min后,向体系中逐渐滴加2,4-二硝基苯磺酰氯的氯仿溶液。滴加完毕后回流5小时反应完全。体系冷却到室温后抽滤,甲醇洗涤,滤饼经干燥,得到粗产品。粗产品经柱色谱分离(按体积比乙酸乙酯:石油醚=1:1)得到黄色纯品。姜黄素、三乙胺和2,4-二硝基苯磺酰氯的摩尔比为1:2-3:2。反应式:
DNSC检测4-甲基苯硫酚(MTP)的方法,步骤为:
(1)、配制pH=7.4、浓度为10mM的HEPES缓冲溶液,配制2mMDNSC的THF溶液,配制2mMMTP的THF溶液;
(2)、按体积比40:1,将体积比1:1,pH7.4的HEPES/MeOH溶液和DNSC的THF溶液加到干净的荧光比色皿中,在荧光分光光度仪上检测,随着待测样MTP的加入,536nm的荧光强度逐渐增强;
(3)、取2mL体积比1:1,pH7.4的HEPES/MeOH溶液、50μLDNSC的THF溶液加到另一个荧光比色皿中,分别加入体积为0、5、10、15、20、25、30、35、40μL的MTP的THF溶液时,在荧光分光光度仪上测定536nm对应的荧光强度F为102、293、473、694、914、1094、1277、1495、1706,以MTP浓度为横坐标,以相对荧光强度F–F0为纵坐标绘制图,F0=102,得到MTP浓度的工作曲线;线性回归方程为:F–F0=40.11c–10.10,c的单位为μM;
(4)、取2mL体积比1:1,pH7.4的HEPES/MeOH溶液、50μLDNSC的THF溶液加入荧光比色皿中,用微量进样器吸取VμL待测样品溶液,加入到此干净的荧光比色皿中,在荧光分光光度仪上检测,将测得的荧光强度代入步骤(3)的线性回归方程,得到浓度c,待测样品MTP浓度C待测样=(2000+50+V待测样)×c×10-6/V,单位M。
所述的MTP可以用苯硫酚或其它苯硫酚衍生物替代。
与现有技术相比,本发明具有如下有益效果:1、检测体系成本低廉,试剂由天然药物姜黄素和2,4-二硝基苯磺酰氯一步合成,原料便宜,反应条件简单,易于大规模生产;2、本发明的检测方法对苯硫酚及其衍生物显示出高的选择性和灵敏性,其它脂肪族硫醇对苯硫酚及其衍生物的测定没有干扰;3、检测方法响应迅速,检测结果准确;4、检测过程在水溶液中进行;5、检测手段简单,只需要借助荧光分光光度仪即可实现。
附图说明:
图1实施例1DNSC与MTP作用的荧光发射图
图2实施例2DNSC与各种分析物作用的荧光柱状图
图3实施例3测定MTP的工作曲线
图4实施例4测定MTP的动力学图
图5实施例5测定样品的荧光发射图
图6a实施例6制备的姜黄素衍生物的氢谱表征
图6b实施例6制备的姜黄素衍生物的碳谱表征
图6c实施例6制备的姜黄素衍生物的质谱表征
具体实施方式:
实施例1
配制pH=7.4、浓度为10mM的HEPES缓冲溶液,配制2mMDNSC的THF溶液,配制2mMMTP的THF溶液;取2mL的HEPES/MeOH(v/v,1:1,pH7.4)溶液、50μLDNSC的THF溶液加到一个荧光比色皿中,取MTP的THF溶液,逐渐用微量进样器加到此比色皿中,边加样边在荧光分光光度仪上检测(404nm激发),随着MTP的加入,536nm处荧光强度逐渐增强。荧光发射图见图1。
实施例2
配制pH=7.4、浓度为10mM的HEPES缓冲溶液,配制2mMDNSC的THF溶液,分别配制2mMMTP,2mMthiophenol,2mM2-aminobenzenethiol,20mMphenol,20mManiline的THF溶液及20mMCys,Hcy,GSH,mercaptoethanol,NaHS,NaHSO3,NaCN,NaSCN,NaCl的水溶液;在14个荧光比色皿中,各加入2mL的HEPES/MeOH(v/v,1:1,pH7.4)溶液、50μLDNSC的THF溶液,再分别加入1摩尔当量的MTP,thiophenol,2-aminobenzenethiol以及50摩尔当量的各种分析物:phenol,aniline,Cys,Hcy,GSH,mercaptoethanol,NaHS,NaHSO3,NaCN,NaSCN,NaCl在荧光分光光度仪上检测(404nm激发),绘制不同分析物对应的536nm处荧光强度的柱状图,(见图2)。MTP,thiophenol,2-aminobenzenethiol使得检测体系的荧光强度明显升高,其它的分析物没有引起检测体系荧光强度的变化。
经实验证明,其它分析物不干扰体系对苯硫酚及其衍生物的测定。
实施例3
配制pH=7.4、浓度为10mM的HEPES缓冲溶液,配制2mMDNSC的THF溶液,配制2mMMTP的THF溶液;取2mL的HEPES/MeOH(v/v,1:1,pH7.4)溶液、50μLDNSC的THF溶液加到一个荧光比色皿中,分别在加入0、5、10、15、20、25、30、35、40μL的MTP的THF溶液时,在荧光分光光度仪上测定536nm对应的荧光强度F为102、293、473、694、914、1094、1277、1495、1706(404nm激发),以MTP浓度为横坐标,以相对荧光强度F–F0为纵坐标绘制图,F0=102,得到MTP浓度的工作曲线(见图3);线性回归方程为:F–F0=40.11c–10.10,c的单位为μM;
实施例4
配制pH=7.4、浓度为10mM的HEPES缓冲溶液,配制2mMDNSC的THF溶液,配制2mMMTP的THF溶液;取2mL的HEPES/MeOH(v/v,1:1,pH7.4)溶液、50μLDNSC的THF溶液加到一个荧光比色皿中,加入10摩尔当量MTP的THF溶液,同时在荧光分光光度仪上测定536nm处荧光强度F随时间的变化(见图4)。经实验证明,该检测方法对MTP响应迅速。
实施例5
配制pH=7.4、浓度为10mM的HEPES缓冲溶液,配制2mMDNSC的THF溶液,配制2mMMTP的THF溶液;取2mL的HEPES/MeOH(v/v,1:1,pH7.4)溶液、50μLDNSC的THF溶液加到一个荧光比色皿中,取MTP的THF溶液28μL,用微量进样器加到此比色皿中,同时在荧光光度仪上测定536nm的对应的荧光强度F为1199(404nm激发),相对荧光强度F–F0=1097,通过实施例3的线性回归方程,求得c=27.60×10-6mol/L,偏差为1.43%。见图5。
实施例6
姜黄素衍生物的制备及表征:
取姜黄素(1mmol,0.368g),三乙胺(3equiv.)溶于20mL氯仿中。搅拌回流10min后,向体系中逐渐滴加2,4-二硝基苯磺酰氯(2equiv.)的氯仿溶液。滴加完毕后回流5小时反应完全。体系冷却到室温后抽滤,甲醇洗涤干燥,得到粗产品。粗产品经柱色谱分离(乙酸乙酯:石油醚=1:1)得到黄色纯品。
1HNMR(600MHz,DMSO-d6):δ9.09(s,2H),8.66(d,J=8.6Hz,2H),8.30(d,J=8.8Hz,2H),7.64(d,J=15.8Hz,2H),7.54(s,2H),7.36(d,J=8.3Hz,2H),7.29(d,J=8.5Hz,2H),7.04(d,J=16.0Hz,2H),6.19(s,1H),3.59(s,6H)(图6a)。13CNMR(151MHz,DMSO-d6):δ183.5,151.7,151.6,148.2,139.9,138.9,136.3,133.4,132.9,127.8,126.4,124.6,121.9,121.2,113.4,102.6,56.4(图6b)。HRMS[M-H]-:m/zCalcd827.0454,Found827.0468(图6c)。
Claims (5)
1.一种姜黄素衍生物DNSC,其特征在于,结构式为:
2.如权利要求1所述的一种姜黄素衍生物DNSC的制备方法,其特征在于,包括如下步骤:将姜黄素、三乙胺溶于氯仿中,搅拌回流10min后,向体系中逐渐滴加2,4-二硝基苯磺酰氯的氯仿溶液,滴加完毕后回流5小时反应完全;体系冷却到室温后抽滤,甲醇洗涤,滤饼经干燥,得到粗产品;粗产品经柱色谱分离,洗脱剂为体积比1:1的乙酸乙酯和石油醚,得到黄色纯品。
3.如权利要求2所述的姜黄素衍生物DNSC的制备方法,其特征在于,所述的姜黄素、三乙胺和2,4-二硝基苯磺酰氯的摩尔比为1:2-3:2。
4.一种快速检测苯硫酚及其衍生物的方法,其特征在于,步骤为:
(1)、配制pH=7.4、浓度为10mM的HEPES缓冲溶液,配制2mM姜黄素衍生物DNSC的THF溶液,配制2mM4-甲基苯硫酚的THF溶液;
(2)、按体积比40:1,将体积比1:1,pH7.4的HEPES/MeOH溶液和DNSC的THF溶液加到干净的荧光比色皿中,在荧光分光光度仪上检测,随着待测样4-甲基苯硫酚的THF溶液的加入,536nm的荧光强度逐渐增强;
(3)、取2mL的体积比1:1,pH7.4的HEPES/MeOH溶液、50μLDNSC的THF溶液加到另一个荧光比色皿中,分别加入体积为0、5、10、15、20、25、30、35、40μL的4-甲基苯硫酚的THF溶液时,在荧光分光光度仪上测定536nm对应的荧光强度F为102、293、473、694、914、1094、1277、1495、1706,以4-甲基苯硫酚的浓度为横坐标,以相对荧光强度F–F0为纵坐标绘制图,F0=102,得到4-甲基苯硫酚浓度的工作曲线;线性回归方程为:F–F0=40.11c–10.10,c的单位为μM;
(4)、取2mL的体积比1:1,pH7.4的HEPES/MeOH溶液、50μLDNSC的THF溶液加入荧光比色皿中,用微量进样器吸取VμL待测样品溶液,加入到此干净的荧光比色皿中,在荧光分光光度仪上检测,将测得的荧光强度代入步骤(3)的线性回归方程,得到浓度c,待测样品4-甲基苯硫酚的浓度C待测样=(2000+50+V待测样)×c×10-6/V,单位M。
5.如权利要求4所述的检测苯硫酚及其衍生物的方法,其特征在于,所述的4-甲基苯硫酚用苯硫酚或其它苯硫酚衍生物替代。
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