CN105602547A - Water-soluble fluorescent probe based on glucoside, synthesis and application - Google Patents

Water-soluble fluorescent probe based on glucoside, synthesis and application Download PDF

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Publication number
CN105602547A
CN105602547A CN201410599185.2A CN201410599185A CN105602547A CN 105602547 A CN105602547 A CN 105602547A CN 201410599185 A CN201410599185 A CN 201410599185A CN 105602547 A CN105602547 A CN 105602547A
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fluorescence probe
fluorescence
glycoside
fluorescent probe
water soluble
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CN105602547B (en
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方志杰
张涛
顾小敏
卢庆光
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Nanjing University of Science and Technology
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Nanjing University of Science and Technology
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Abstract

The invention discloses a water-soluble fluorescent probe compound based on glucoside, synthesis and application thereof. The fluorescent probe is obtained through two-step reaction, and has the characteristics of cheap and easily-obtained reaction raw materials, few reaction steps, high yield and the like. The invention discloses multiple applications of the sugar-based carbon glycoside fluorescent probe, which comprises the following steps: 1. analyzing the pH value, namely analyzing the pH value by utilizing the characteristics of an acid-base switch of the fluorescent probe because the fluorescent probe does not have fluorescence under the acid condition and the fluorescence is kept under the alkali condition; 2. sulfhydryl anion detection, namely selectively detecting sulfhydryl by utilizing the characteristics of alpha, beta-unsaturated ketone (namely, the property of providing electrophilic center); 3. protein labeling is used for labeling proteins and enhancing the sensitivity of protein detection by utilizing the characteristic that the fluorescent compound has weak or no fluorescence in a protic solvent, but generates fluorescence after adding the proteins into an aqueous solution of the compound.

Description

A kind of water soluble fluorescence probe, synthetic and application based on C-glycoside
Technical field
The present invention relates to a kind of new type water-solubility fluorescence probe based on C-glycoside and its production and use, specifically, relate to a kind of synthetic and application of the sugar charcoal glycoside fluorescent probe compounds with lignocaine benzaldehyde structure.
Background technology
At present the relevant fluorescence probe based on sugared obtains after by glycosidic bond combination by glycan molecule and fluorescent chemicals (as rhodamine, cumarin) mostly, thereby different fluorescent chemicalses are carried out to modification, but little with the research of the fluorescence probe of C-glycoside. Carbon glycosides, because it is for natural O-and N-glycosides, has chemistry and biology stability preferably, and resistance to acids and bases and the stability to glycosidase, attracting domestic and international numerous scholars' concern.
In protein, sulfydryl part is the functional group most with reactivity relevant with enzymatic activity, therefore seems particularly important for the detection of sulfhydryl compound. Mainly by colorimetric owing to detecting sulfydryl at present, electrochemistry, the methods such as mass spectrum, but these method complex operations, high to the purity requirement of detection thing, sensitivity is low. Therefore, fluoroscopic examination means have high sensitivity because of it, excellent specific property easy and simple to handle and become gradually the emphasis about-SH compound test. Particularly, in protein detection, fluorescence probe can strengthen the sensitivity of detection, and to the mensuration of protein content, the research of protein structure has great importance.
Summary of the invention
Inventor's object is to provide synthesizing of a kind of water soluble fluorescence probe based on C-glycoside and preparation method thereof.
Another object of the present invention is this kind of fluorescence probe to be applied to sulfydryl anion detect, acid-base value analysis, protein labeling aspect.
Realizing technical solution of the present invention is: a kind of water soluble fluorescence probe based on C-glycoside, and described fluorescence probe has following structure:
Synthesizing of a kind of water soluble fluorescence probe based on C-glycoside, comprise the steps:
(1) by 3-acetyl group-5-C-(2,3-dihydroxy-1,4-dehydration-D-erythro furyl glycosyl)-2-methylfuran and 4-N, TMSDEA N diethylamine benzaldehyde is dissolved in alcohol solvent, and add catalyst sodium hydrate aqueous solution in reactor, stirring at room temperature reaction, TLC plate is followed the tracks of to react to raw material and is disappeared;
(2), except desolventizing, silicagel column is purified, and obtains the thick target product of bronzing.
3-acetyl group-5-C-(2 described in step (1); 3-dihydroxy-1; 4-dehydration-D-erythro furyl glycosyl)-2-methylfuran, 4-N; the mol ratio of TMSDEA N diethylamine benzaldehyde and catalyst sodium hydrate aqueous solution (mass fraction is 10%) is 1:1.5:1.25, and the stirring at room temperature reaction time is 6h.
An application for water soluble fluorescence probe based on C-glycoside, detects the fluorescence probe of above-mentioned preparation and protein labeling for acid-base value analysis, sulfydryl anion.
Principle of the present invention is:
This fluorescence probe is divided into three parts by the present invention: binding site, by glycosylation, strengthens this fluorescent chemicals hydrophily and biocompatibility; Signaling switch, this zone similarity, in the bridge of fluorescence transfer part, can, by nucleopilic reagent attack, destroy conjugated system, and fluorescence is disappeared; Hyperchromic group, by increase this region to electronics, can strengthen fluorescence and the UV absorption intensity of compound entirety, improve the sensitivity of this compound in the time of application, strengthen using value and the feasibility of this compound for multi-field fluoroscopic examination.
The present invention compared with prior art, its remarkable advantage: (1) this fluorescent chemicals has good water-soluble. (2) this fluorescent chemicals fluorescence in proton solvent disappears or weakens, and in aprotic solvent, fluorescence strengthens. (3) this fluorescent chemicals has stronger adhesive ability to protein, and after protein combination, sends green fluorescence. (4) range of application of this fluorescent chemicals is wider, can detect for anion acid-base value analysis, the fields such as protein labeling.
Brief description of the drawings
The ultraviolet spectrogram of the fluorescence probe series compound 2 of Fig. 1 based on carbon glycosides sugar under different solvents.
The fluorescence spectrum figure of the fluorescence probe series compound 2 of Fig. 2 based on carbon glycosides sugar under different solvents.
The fluorescence spectrum change in concentration figure of the fluorescence probe series compound 2 of Fig. 3 based on carbon glycosides sugar.
The anion of the fluorescence probe series compound 2 of Fig. 4 based on carbon glycosides sugar detects analysis chart.
Fig. 5 is during anion detects, and relative fluorescence probe 2 adds the percentage that fluorescence reduces and fluorescence strengthens after different anions.
The Acidity of Aikalinity of the fluorescence probe series compound 2 of Fig. 6 based on carbon glycosides sugar detects analysis chart.
The fluorescence probe series compound 2 of Fig. 7 based on carbon glycosides sugar detects analysis chart with BSA protein combination concentration and fluorescence intensity.
The fluorescence probe series compound 2 and BSA protein combination concentration and fluorescence intensity graph of a relation of Fig. 8 based on carbon glycosides sugar.
Detailed description of the invention
Below provide the synthetic of a kind of fluorescent chemicals based on C-glycoside of the present invention and in acid-base value analysis, sulfhydryl compound detects, the application testing of protein labeling aspect.
The synthetic route of the compounds of this invention is as follows, and first glucose obtains compound 1 through Lewis acid catalysis and acetylacetone,2,4-pentanedione condensation, then reacts with aromatic aldehyde, obtains compound 2, and its two steps productive rate can reach 55%.
Embodiment 1
The preparation of compound 2
By 3-acetyl group-5-C-(2 of 0.226g (1mmol), 3-dihydroxy-1, 4-dehydration-D-erythro furyl glycosyl)-2-methylfuran 1 is (wherein, 3-acetyl group-5-C-(2, 3-dihydroxy-1, 4-dehydration-D-erythro furyl glycosyl) preparation of-2-methylfuran is referring to document: Xiang Yanfei, local records outstanding person, Li Longxia, CoCl26H2O, AlCl36H2O is at the synthetic C-pyrroles's glucosides of aqueous catalysis, chemical research and application, 2013, 25 (10): 1426-1429.) be dissolved in 4mL ethanol, add 4-N to moving liquid in reaction system, TMSDEA N diethylamine benzaldehyde 0.266g (1.5mmol) and 10%NaOH aqueous solution 0.15mL, under room temperature, stir 8h, follow the tracks of with TLC, after reaction finishes, decompression distillation is except desolventizing, and extract with 15mL ethyl acetate, saturated NaCl solution 20mL washing three times, anhydrous sodium sulfate drying organic layer, filter, decompression distillation obtains thick product, silica gel column chromatography separating-purifying (benzinum: ethyl acetate=3:1), obtain peony paste liquid 0.343g, productive rate is 89%.
1HNMR(500MHz,CDCl3)δ7.62(d,J=15.4Hz,1H),7.42(d,J=8.6Hz,2H),6.90(d,J=15.4Hz,1H),6.70(s,1H),6.56(t,J=9.1Hz,2H),4.70(d,J=5.9Hz,1H),4.35(d,J=15.7Hz,3H),4.27–4.13(m,2H),3.88(d,J=10.0Hz,1H),3.34(dd,J=13.9,6.9Hz,5H),2.54(s,3H),1.13(t,J=7.0Hz,6H).
13CNMR(CDCl3):δ186.5,159.0,149.9,149.7,145.1,130.9,122.7,121.3,117.6,111.2,109.3,76.9,74.7,73.1,71.0,44.4,14.6,12.5.
ESI-MSm/z:386.1(M+H)+.
Embodiment 2
The ultraviolet of different solvents on this fluorescence probe and the impact of fluorescence spectrum.
The difference of solvent, can have a certain impact to the fluorescence intensity of fluorescence probe and maximum absorption wavelength. Fig. 1 and Fig. 2 provide the ultraviolet of fluorescence probe 2 under different solvents and the change of properties of fluorescence spectrum of carbon glycosides sugar. As can be seen from Figure 1, this compound ultraviolet maximum absorption wavelength changes little, in Fig. 2, the variation of fluorescence maximum absorption wavelength is comparatively obvious, by calculating the stokes displacement of this fluorescence probe 2, and compared with other fluorescence probes (most of fluorescent material stokes displacement is between 50-70nm), this fluorescent chemicals has larger stokes displacement (86nm, solvent is acetonitrile). This compound is at DMF, CH3In CN isopolarity aprotic solvent, fluorescent absorption is stronger, and in polar aprotic solvent, the basic cancellation of fluorescence.
Embodiment 3
The fluorescence intensity of the fluorescent probe compounds 2 of C-glycoside and change in concentration relation.
Fig. 3 provides fluorescence intensity and the concentration curve figure of the fluorescence probe series compound 2 of carbon glycosides sugar, from collection of illustrative plates, can obtain, and compound 2 is in acetonitrile solvent, when concentration reaches 4 × 10-5Time, its fluorescence intensity is the highest, and in the time that concentration continues to increase, fluorescence starts to weaken gradually.
Embodiment 4
The detection of the fluorescent probe compounds 2 of C-glycoside to sulfydryl anion.
By screening common anion, can obtain being adapted to the anion that this detects based on carbon glycosides sugar fluorescence probe system. The anion that Fig. 4 has provided the fluorescent probe compounds 2 of carbon glycosides sugar detects analysis chart, and Cl has been selected in test-,NO2 -,H2PO4 -,HSO3 -,I-,F-,-SH ion and group, this compound has higher susceptibility to sulfydryl as can be drawn from Figure 5. When compound is in the time that sulfhydryl compound is combined, the fluorescence of compound disappears.
Embodiment 5
The fluorescence probe of C-glycoside detects acid-base value.
Due to the detection of fluorescence probe and the Acidity of Aikalinity of environment closely related, Fig. 6 provides the acid-base value detection case of the fluorescent probe compounds 2 of carbon glycosides sugar, from figure, can obtain, under acid condition system fluorescence disappear, alkali condition fluorescence keep.
Embodiment 6
The fluorescence probe of C-glycoside is to protein labeling.
In addition,, in order to analyze the mark situation of this fluorescence probe to protein, Fig. 7 and Fig. 8 have provided compound 2 and have detected analysis chart with BSA protein combination concentration and fluorescence intensity, with 4x10-4The compound 2 of mol/L is primary standard substance, tests. Configuration concentration is respectively 0.1,0.2, and 0.4,0.6,0.8,1.0,1.2,1.4,1.6,1.8, the concentration of 2.0mg/mL is analyzed, and finds that its fluorescence intensity reaches peak in the time that concentration reaches 1.6mg/mL, and in the time continuing to improve BSA concentration, fluorescence intensity is substantially constant.

Claims (6)

1. the water soluble fluorescence probe based on C-glycoside, is characterized in that, described fluorescence probe has following structure:
2. the water soluble fluorescence probe based on C-glycoside as claimed in claim 1 is synthetic, it is characterized in that, comprises the steps:
(1) by 3-acetyl group-5-C-(2,3-dihydroxy-1,4-dehydration-D-erythro furyl glycosyl)-2-methylfuran and 4-N, TMSDEA N diethylamine benzaldehyde is dissolved in alcohol solvent, and add catalyst sodium hydrate aqueous solution in reactor, stirring at room temperature reaction, TLC plate is followed the tracks of to react to raw material and is disappeared;
(2), except desolventizing, silicagel column is purified, and obtains the thick target product of bronzing.
3. the water soluble fluorescence probe based on C-glycoside as claimed in claim 2 is synthetic; it is characterized in that; 3-acetyl group-5-C-(2 described in step (1); 3-dihydroxy-1; 4-dehydration-D-erythro furyl glycosyl)-2-methylfuran, 4-N, the mol ratio of TMSDEA N diethylamine benzaldehyde and catalyst NaOH is 1:1.5:1.25.
4. the water soluble fluorescence probe based on C-glycoside as claimed in claim 2 is synthetic, it is characterized in that, the stirring at room temperature reaction time described in step (1) is 6h.
5. the water soluble fluorescence probe based on C-glycoside as claimed in claim 2 is synthetic, it is characterized in that, the mass fraction of the sodium hydrate aqueous solution described in step (1) is 10%.
6. the application of the water soluble fluorescence probe based on C-glycoside as described in as arbitrary in claim 1-5, is characterized in that, fluorescence probe is detected and protein labeling for acid-base value analysis, sulfydryl anion.
CN201410599185.2A 2014-10-30 2014-10-30 Water-soluble fluorescent probe based on glucoside, synthesis and application Expired - Fee Related CN105602547B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108003145A (en) * 2016-11-02 2018-05-08 南京理工大学 A kind of water-soluble carbon glycosides coumarin fluorescent probe, synthetic method and application

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Patent Citations (2)

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CN102533249A (en) * 2010-12-17 2012-07-04 中国科学院生态环境研究中心 Preparation of water soluble saccharide fluorescent molecular probe and rapid detection for iron ions in water and biological tissue
CN102533250A (en) * 2010-12-17 2012-07-04 中国科学院生态环境研究中心 Preparation of water-soluble fluorescence probe and rapid detection of iron ion by use of the same

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