CN107501313A - A kind of near infrared light hot dye and preparation and application based on azepine fluorine borine - Google Patents

A kind of near infrared light hot dye and preparation and application based on azepine fluorine borine Download PDF

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CN107501313A
CN107501313A CN201710737140.0A CN201710737140A CN107501313A CN 107501313 A CN107501313 A CN 107501313A CN 201710737140 A CN201710737140 A CN 201710737140A CN 107501313 A CN107501313 A CN 107501313A
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thermal
near infrared
infrared light
dyestuff
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赵强
黄维
徐云剑
刘淑娟
赵梦龙
冯腾
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Nanjing Post and Telecommunication University
Nanjing University of Posts and Telecommunications
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Abstract

The invention discloses a kind of near infrared light hot dye based on azepine fluorine borine and preparation and application.The photo-thermal dyestuff is made up of the electron-donating group containing lone pair electrons and basic azepine fluorine borine skeleton.Azepine fluorine borine photo-thermal dyestuff is prepared by following step:(1) synthesis of ketenes, both aldehyde ketone addition elimination reaction occur in the basic conditions obtain;(2) addition reaction of ketenes and nitromethane;(3) annulation;(4) complexation reaction, the product both obtained in (3) are coordinated to obtain target product with boron difluoride.Photo-thermal dyestuff can be used for the technical fields such as photothermal imaging, the optical dynamic therapy and photo-thermal therapy under photoacoustic imaging guiding, biomarker and detection.

Description

A kind of near infrared light hot dye and preparation and application based on azepine fluorine borine
Technical field
The invention belongs to organic photoelectrical material technical field.Near-infrared is had based on azepine fluorine borine more particularly to a kind of The photo-thermal dyestuff and its preparation method of absorption and its in the fields such as fluorescence imaging, photothermal imaging, photoacoustic imaging, photo-thermal therapy Using.
Background technology
Tumour threatens the health of the mankind.Traditional oncotherapy means, such as operative treatment, chemotherapy, radiotherapy are deposited In some problems, often along with side effect.As a kind of oncotherapy means of Noninvasive, photo-thermal therapy can be real-time Carry out tumor locus accurately treat.Greatly improve the effect of oncotherapy.And the selection of optothermal material is controlled for photo-thermal Therapeutic effect has decisive role.Therefore, preferable optothermal material how is selected to cause everybody extensive concern.
Some main illuminophores in recent years, for example, the dyestuff such as fluorine borine, Hua Jing, porphyrin is wide according to different demands General design and synthesis.A kind of photostability that wherein fluorine boranes dyestuff has had as conventional dyestuff, the production of high quantum Rate, big molar extinction coefficient and easily modify.This also causes it to be widely used in fluorescence labeling, optical imagery, optical tumor The fields such as treatment.Compared with the fluorine borine with similar structure, azepine fluorine borine has longer absorbing wavelength, and it should in live body The unique advantage in.But it still shows the radiation transistion that can not ignore, this partial radiation transition can weaken singlet and arrive The transformation and nonradiative transition of triplet state and then weaken the conversion of photo-thermal.How to weaken radiation transistion raising nonradiative transition to come Improving photothermal deformation is worth research.
Photo induced electron transfer refers to what molecule occurred after electromagnetic wave (visible light, ultraviolet light etc.) irradiation of specific wavelength Electronics transfer phenomena between intramolecule or molecule.It is related to many chemical fields, such as:Solar cell, it is artificial synthesized, Luminescence probe etc..In many photochemistry fields, molecular structure and energy level affect the effect and efficiency of photo induced electron transfer.Especially It is that intramolecular photo induced electron transfer determines Quenching of fluorescence.
Azepine fluorine borine dyestuff is generally used for the fields such as biomarker, imaging, optical dynamic therapy, so far, few People's report designs and synthesized the azepine fluorine borine dyestuff with good photo-thermal effect using effective theoretical direction.Based on photic Electron-donating group is connected to near by the theoretical direction of electronics transfer and the excellent properties of azepine fluorine boranes dyestuff, the present invention On the nitrogen fluorine borine dyestuff of infrared absorption, so as to make it have good photoacoustic imaging, photothermal imaging and the photo-thermal of tumor Therapeutic effect.
The content of the invention
Technical problem:In view of above-mentioned technical problem in the prior art be present, it is an object of the invention to provide a kind of theoretical The photo-thermal dyestuff of the new near infrared absorption of design and its preparation and application.
Technical scheme:The near infrared light hot dye of the present invention is function of the introducing containing electron donor on azepine BODIPY Group, makes it not only have good photoacoustic imaging and photothermal imaging effect, and have good light thermal property so that its Treatment under imaging guiding is significant, while has in the optothermal material of design, synthesis with good light thermal property There is important directive significance.
The present invention provides a kind of near infrared light hot dye, has following general structure:
The synthetic route of photo-thermal dyestuff near infrared absorption is as follows:
Wherein, R1、R2At least one is selected from In one kind, R1、R2Can be with identical, can also be different, R3For the straight chain with 1 to 16 carbon atom, side chain or Person's cyclic alkyl chain;
Wherein X is Br, I or H;
Specifically 1 and 2 reaction synthesis 3,3 are after occurring addition reaction, after then cyclization synthesis 5,5 and boron fluoride are coordinated, Then the photo-thermal dyestuff C of halogenation synthesis near infrared absorption.
The application of the near infrared light hot dye is:Cell co-focusing imaging.
The application of the near infrared light hot dye is:Tumor mouse photoacoustic imaging.
The application of the near infrared light hot dye is:Tumor mouse photothermal imaging.
The application of the near infrared light hot dye is:Tumor mouse photo-thermal therapy.
The present invention has the advantages that:
Photo-thermal dyestuff near infrared light of the present invention excites, and so as to weaken injury of the excitation source to biological tissue, cuts Influence of the weak background fluorescence to detection signal, and there are deeper tissue penetration depths;
Photo-thermal dyestuff of the present invention is instructed by photo induced electron transfer theory, realizes luminous quenching and light well The conversion of heat and its red shift for absorbing emission spectrum;
The oncotherapy that photo-thermal dyestuff of the present invention can be used under photothermal imaging, photoacoustic imaging guiding, is good life Object light heat cure material.
Photo-thermal dyestuff preparation method technique of the present invention is simple, abundant raw material, is easy to industrialized production;
Brief description of the drawings
C MALDI-TOF/TOF scheme in Fig. 1 embodiment of the present invention 1;
D MALDI-TOF/TOF scheme in Fig. 2 embodiment of the present invention 2;
C in Fig. 3 embodiment of the present invention 11H-NMR schemes;
D in Fig. 4 embodiment of the present invention 21H-NMR schemes;
C UV-visible spectrum in Fig. 5 embodiment of the present invention 1;
D UV-visible spectrum in Fig. 6 embodiment of the present invention 2;
C launching light spectrogram in Fig. 7 embodiment of the present invention 1;
D launching light spectrogram in Fig. 8 embodiment of the present invention 2;
The photo-thermal effect of the PBS solution of the various concentrations of C sample in Fig. 9 embodiment of the present invention 1;
The photo-thermal effect of the PBS solution of the various concentrations of D samples in Figure 10 embodiment of the present invention 2;
Embodiment
Technical scheme is more fully understood below by specific example, and further illustrates the skill of the present invention Art scheme, specific synthesis and property are determined as follows.The following example is several examples in technical solution of the present invention, without It is limitation of the present invention.
Embodiment 1:Azepine fluorine borine photo-thermal dyestuff C synthesis
The synthesis of compound 2
Take a clean two-mouth bottle, add magneton, 1.49g paradime thylaminobenzaldehyde (about 10mmol), 2.8g 1 (about 10mmol) and 40ml ethanol solution.Stirring is slowly added to 23ml sodium hydride solutions (hydrogen containing 2.0g after solid all dissolving Sodium oxide molybdena).24h is stirred in the reaction at room temperature, there is yellow solid precipitation in course of reaction.After reaction terminates, 1M hydrochloric acid solution Reaction solution is adjusted to neutrality, filters to obtain solid, deionized water is washed three times.It is dried in vacuo 2.1g light yellow solid.
1H NMR(400MHz,CDCl3):δ (ppm)=8.01 (d, J=8.0Hz, 2H), 7.78 (d, J=16.0Hz, 1H), 7.53 (d, J=8.0Hz, 2H), 7.35 (d, J=16.0Hz, 1H), 6.98 (d, J=8.0Hz, 2H), 6.69 (d, J= 8.0Hz,2H),4.21(t,2H),3.89(t,2H),3.77-3.65(m,6H),3.55(m, 2H),3.38(s,3H),3.04 (s,6H).
The synthesis of compound 3
Take a clean bottle with two necks, add magneton, 0.83g 2 (about 2mmol), 3.2ml are added under the protection of nitrogen Nitromethane (about 60mmol), 6.2ml diethylamine (about 60mmol) and 25.0ml absolute methanol.After being heated to reflux 24h, use 1M hydrochloric acid solution adjusts reaction solution to neutrality, filters to obtain solid, cold methanol washs three times.0.6 gram is obtained after vacuum drying Product.
1H NMR(400MHz,CDCl3):δ (ppm)=7.88 (d, J=8Hz 2H), 7.12 (d, J=8Hz 2H), 6.92 (d, J=8Hz, 2H), 6.66 (d, J=8Hz 2H), 4.80-4.75 (dd, J=8,12Hz, 1H), 4.64-4.58 (dd, J= 8,12 Hz, 1H), 4.18 (t, J=4Hz, 2H), 4.09 (m, 1H), 3.87 (t, J=4Hz, 2H), 3.75-3.63 (m, 6H), 3.55-3.53 (m, 2H), 3.40-3.27 (m J=12.0,6.6,3.3Hz, 1H), 3.40-3.27 (m, 5H), 2.91 (s, 6H).
The synthesis of compound 4
A clean 50ml single port bottles are taken, add magneton, 0.48g (1mmol) b1,10mL absolute ethyl alcohol, 2.7g (about 35mmol) ammonium acetate solid, about 12h is heated to reflux under magnetic agitation.It is concentrated under reduced pressure to the 1/4 of original volume, treats that solution cools down To room temperature, brown solid is filtrated to get, absolute ethyl alcohol washing, 0.15g blue solid products are obtained after drying.
Compound C synthesis
A clean 50ml single port bottles are taken, add magneton, the dichloromethane dissolving that 0.15g (0.17mmol) c1,10mL is dried. At 0~5 DEG C, the lower addition 0.11g of nitrogen protection newly steams triethylamine (1.1mmol), then is slowly added to Eorontrifluoride etherate dropwise (0.22g, 1.6mmol), is added dropwise, and moves to and 6h is stirred at room temperature, and after reaction terminates, mixed solution is through washing, saturated sodium-chloride Wash, anhydrous sodium sulfate drying, be concentrated under reduced pressure, column chromatography purifying, obtain 0.12g blue solid products.
1H NMR(400MHz,CDCl3):δ=8.07 (d, J=8.8Hz, 4H), 8.02 (d, J=8.4Hz, 4H), 6.99 (d, J=8.8Hz, 4H), 6.82 (s, 2H), 6.77 (d, J=8.8Hz, 4H), 4.20 (t, J=4.4Hz, 4H), 3.90-3.86 (t, J=4.8Hz, 4H), 3.77-3.75 (m, 4H), 3.71-3.66 (m, 8H), 3.56 (t, J=5.2Hz, 4H), 3.39 (s, 6H),3.08(s,12H).
[m/e]MALDI-TOF-MS calcd.For C50H60BF2N5O8:907.85,found 907.458
Embodiment 2:Azepine fluorine borine photo-thermal dyestuff D synthesis
The synthesis of compound 1
A clean two-mouth bottle is taken, adds magneton, 1.36g parahydroxyacet-ophenone (about 10mmol), 9.66g bromooctane The anhydrous N,N-dimethylformamide solution of (about 50mmol), 6.91g potassium carbonate and 40ml.Under magnetic agitation, 80 DEG C of reactions 24h.After reaction terminates, water/dichloromethane extraction is multiple, merges organic phase.Through chromatographing post separation, light yellow liquid is obtained 2.46g (yield about 99%).
The synthesis of compound 2
Take a clean two-mouth bottle, add magneton, 1.24g 1 (about 5mmol), 0.75g paradime thylaminobenzaldehyde (about 5mmol) and 20ml ethanol solution.Stirring is slowly added to 5ml sodium hydride solutions (hydrogen containing 1.00g after solid all dissolving Sodium oxide molybdena).24h is stirred in the reaction at room temperature, there is yellow solid precipitation in course of reaction.After reaction terminates, 1M hydrochloric acid solution Reaction solution is adjusted to neutrality, filters to obtain solid, deionized water is washed three times.Be dried in vacuo 1.96g yellow solid (yield is about 96%).
1H NMR(400MHz,CDCl3):δ (ppm)=8.02 (d, J=8.8Hz, 2H), 7.79 (d, J=15.6Hz, 1H), 7.55 (d, J=8.8Hz, 2H), 7.36 (d, J=15.6Hz, 2H), 6.95 (d, J=8.8Hz, 2H), 6.69 (d, J=9.2Hz, 2H), 4.02 (t, J=6.8Hz, 2H), 3.03 (s, 6H), 1.84-1.77 (m, 2H), 1.50-1.29 (m, 10H), 0.91-0.89 (m, 3H).
The synthesis of compound 3
Take a clean bottle with two necks, add magneton, 1.90g 2 (about 5mmol), 1.3ml are added under the protection of nitrogen Nitromethane (about 25mmol), 2.6ml diethylamine (about 25mmol) and 25.0ml absolute methanol.After being heated to reflux 24h, use 1M hydrochloric acid solution adjusts reaction solution to neutrality, filters to obtain solid, cold methanol washs three times.1.56 grams are obtained after vacuum drying Product (yield about 82%).
1H NMR(400MHz,CDCl3):δ (ppm)=7.89 (d, J=8.8,2H), 7.13 (d, J=8.8,2H), 6.90 (d, J=8.8,2H), 6.67 (d, J=8.8,2H), 4.79 (dd, J=6.4Hz, 12.0Hz, 1H), 4.62 (dd, J= 7.6Hz, 12.4Hz, 1H), 4.14-4.07 (m, 1H), 4.01 (t, J=6.0Hz, 2H), 3.41-3.28 (m, 2H), 2.92 (s, 6H),1.83–1.76(m, 2H),1.49-1.29(m,10H),0.91-0.88(m,3H).
The synthesis of compound 4
A clean 100ml single port bottles are taken, add magneton, 1.56g (3.5mmol) 3,9.44g (about 123mmol) ammonium acetate Solid, 20mL n-butanols, about 12h is heated to reflux under magnetic agitation.It is concentrated under reduced pressure to the 1/4 of original volume, treats that solution is cooled to Room temperature, brown solid is filtrated to get, absolute ethyl alcohol washing, 0.64g blue solids product (yield about 46%) is obtained after drying.
The synthesis of compound 5
A clean 50ml single port bottles are taken, add the dichloromethane dissolving that magneton, 0.40g (0.5mmol) 4,10mL are dried. At 0~5 DEG C, the lower addition 0.11g of nitrogen protection newly steams triethylamine (1.1mmol), then is slowly added to Eorontrifluoride etherate dropwise (0.44g, 3.2mmol), is added dropwise, and moves to and 6h is stirred at room temperature, and after reaction terminates, mixed solution is through washing, saturated sodium-chloride Wash, anhydrous sodium sulfate drying, be concentrated under reduced pressure, column chromatography purifying, obtain 0.30g blue solids product (yield about 90%).
1H NMR(400MHz,CDCl3):δ (ppm)=8.08 (t, J=8.0Hz, 8H), 7.48-7.41 (m, 4H), 6.83 (s, 2H) 7.04 (s, 2H), 6.77 (d, J=8.0Hz, 4H), 4.03 (t, J=6.0Hz, 4H), 1.81 (t, J=6.4Hz, 4H),1.49–1.27(m,20H),0.91-0.89(m,6H).
Compound D synthesis
A clean 50ml single port bottles are taken, add the dichloromethane dissolving that magneton, 0.30g (0.35mmol) 5,10mL are dried. At 0 DEG C, after adding 0.125g NBS, 6h is stirred, after reaction terminates, mixed solution is washed through washing, saturated sodium-chloride, anhydrous sulphur Sour sodium is dry, is concentrated under reduced pressure, and column chromatography purifying, obtains 0.17g blue solids product (yield about 50%).
1H NMR(400MHz,CDCl3):δ (ppm)=8.00 (d, J=8.8Hz, 4H), 7.71 (d, J=8.8 Hz, 4H), 6.94 (d, J=8.8Hz, 4H), 6.76 (d, J=9.2Hz, 4H), 3.98 (t, J=6.4Hz, 4H), 3.07 (s, 12H), 1.82–1.75(m,4H),1.49–1.42(m,4H),1.35-1.29(m,16H), 0.91-0.89(m,6H)
Embodiment 3:The test of C molecular weight
A small amount of sample C is taken, is mixed with matrix, then point sample, is measured with MALDI-TOF/TOF, such as Fig. 1, preliminary card Understand the correctness of C molecules.
[m/e] (M, MALDI-TOF) theoretical value:907.85, experiment value:907.46
Embodiment 4:The test of D molecular weight
A small amount of sample D is taken, is mixed with matrix, then point sample, is measured with MALDI-TOF/TOF, such as Fig. 2, preliminary card Understand the correctness of D molecules.
[m/e] (M, MALDI-TOF) theoretical value:997.72, experiment value:996.01
Embodiment 5:C nuclear-magnetism test
Take 0.5mg samples C to be dissolved in 0.5ml deuterochloroforms, tested through nuclear-magnetism, such as Fig. 3, further demonstrate C molecules Correctness.
1H NMR(400MHz,CDCl3):δ (ppm)=8.08 (d, J=8Hz, 4H), 8.02 (d, J=8 Hz, 4H), 7.00 (d, J=8Hz, 4H), 6.82 (s, 2H), 6.79 (d, J=8Hz, 4H), 4.20 (t, J=4Hz, 4H), 3.89 (t, J= 4Hz, 4H), 3.76 (t, J=4Hz, 4H), 3.71-3.67 (m, 8H), 3.56 (t, J=8 Hz, 4H), 3.39 (m, 3H), 3.08 (m,36).
Embodiment 6:D nuclear-magnetism test
Take 0.5mg samples D to be dissolved in 0.5ml deuterochloroforms, tested through nuclear-magnetism, such as Fig. 4, further demonstrate D molecules Correctness.
1H NMR(400MHz,CDCl3):δ (ppm)=8.00 (d, J=8.8Hz, 4H), 7.71 (d, J=8.8 Hz, 4H), 6.94 (d, J=8.8Hz, 4H), 6.76 (d, J=9.2Hz, 4H), 3.98 (t, J=6.4Hz, 4H), 3.07 (s, 12H), 1.82–1.75(m,4H),1.49–1.42(m,4H),1.35-1.29(m,16H), 0.91-0.89(m,6H)
Embodiment 7:C ultraviolet-visible spectrum test:
Configure the weak solution (10 of the C in embodiment 1-5M, toluene are solvent), pipette 2mL C solutions and carried out in cuvette Ultraviolet-visible luminous spectrum is tested, as Fig. 5 shows:After electron-donating group is introduced, realize bigger near-infrared and inhale.
Embodiment 8:D ultraviolet-visible spectrum test:
Configure the weak solution (10 of the D in embodiment 1-5M, toluene are solvent), pipette 2mL solution Ds and carried out in cuvette Ultraviolet-visible luminous spectrum is tested, as Fig. 6 shows:With the introducing of bromine atoms, compared with C, the absorption maximum blue shift of D samples.
Embodiment 9:C emission spectrum test:
Configure the weak solution (10 of the C in embodiment 1-5M, toluene are solvent), pipette 2mL C solutions and carried out in cuvette Emission spectrum is tested.As Fig. 7 shows:Material C has good near infrared emission, emission maximum 785nm in toluene solution.
Embodiment 10:D emission spectrum test:
Configure the weak solution (10 of the D in embodiment 1-5M, toluene are solvent), pipette 2mL C solutions and carried out in cuvette Emission spectrum is tested.As Fig. 8 shows:Material D has good near infrared emission, emission maximum about 820nm in toluene solution.
Embodiment 11:C photo-thermal effect
C in embodiment 1 is dissolved with DMSO, various concentrations gradient is diluted to pH=7.4 PBS cushioning liquid Solution (0,5,10,15,25 μM), with 785nm laser illumination 7min (0.5W/cm2), recorded with light thermal imaging system different Under time, various concentrations, the change of solution temperature.Shown by Fig. 9, as concentration increases, in embodiment 1, C solution temperature is most Up to 23 DEG C of big change.
Embodiment 12:D photo-thermal effect
D in embodiment 2 is dissolved with DMSO, various concentrations gradient is diluted to pH=7.4 PBS cushioning liquid Solution (0,5,10,15,25 μM), with 730nm laser illumination 7min (0.5W/cm2), recorded with light thermal imaging system different Under time, various concentrations, the change of solution temperature.Up to 27 DEG C of the maximum change of D solution temperature in embodiment 2.

Claims (6)

1. a kind of near infrared light hot dye based on azepine fluorine borine, it is characterised in that there is following general structure:
Wherein, R1、R2It is selected fromIn one kind, R3 For the straight chain with 1 to 16 carbon atom, side chain or cyclic alkyl chain;
Wherein X is Br, I or H.
2. the preparation of photo-thermal dyestuff as claimed in claim 1, it is characterised in that concretely comprise the following steps:
Specifically:
(1) 1 (10.0mmol) and 2 (10.0mmol) are anti-in 10ml 10% sodium hydroxide (aq) and 20ml alcohol mixed solutions After answering 12h, after adjusting reaction solution pH to 5~7 with watery hydrochloric acid, filtering, the washing of cold ethanol, product 3 is obtained;
(2) in the basic conditions, after with nitromethane (25.0mmol) addition reaction occurs for 3 (5.0mmol), adjusted with watery hydrochloric acid Reaction solution pH to 5~7;Filtering, the washing of cold ethanol, obtain product 4;
After in ethanol solution with ammonium acetate annulation occurs for (3) 4 (2.0mmol), concentration, filtering, the washing of cold ethanol, obtain Product 5;
(4) in dry methylene chloride solution, after with BFEE complexation reaction occurs for 5 (1.5mmol), concentration, water is added After suction filtration, product 6 is obtained by column chromatography, target product C when halogen-free;In dichloromethane or chloroformic solution, propiodal or Bromine source occurs substitution reaction with 6 (1.0mmol) and obtains target product C.
3. the application of near infrared light hot dye as claimed in claim 1, it is characterised in that it is glimmering that the photo-thermal dyestuff is used for biology Photoimaging.
4. the application of near infrared light hot dye as claimed in claim 1, it is characterised in that the photo-thermal dyestuff is used for bio-light Thermal imaging.
5. the application of near infrared light hot dye as claimed in claim 1, it is characterised in that the photo-thermal dyestuff is used for bio-light Acoustic imaging.
6. the application of near infrared light hot dye as claimed in claim 1, it is characterised in that the photo-thermal dyestuff swells for live body Knurl photo-thermal therapy.
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Application publication date: 20171222