CN107253965B - FRET molecule and its synthetic method of the one kind based on fluorine boron pyrroles and cumarin - Google Patents

FRET molecule and its synthetic method of the one kind based on fluorine boron pyrroles and cumarin Download PDF

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CN107253965B
CN107253965B CN201710516982.3A CN201710516982A CN107253965B CN 107253965 B CN107253965 B CN 107253965B CN 201710516982 A CN201710516982 A CN 201710516982A CN 107253965 B CN107253965 B CN 107253965B
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yellow solid
fluorine boron
molecule
fret
cumarin
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CN107253965A (en
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张晓琳
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Dalian University
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    • C07ORGANIC CHEMISTRY
    • C07FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F5/00Compounds containing elements of Groups 3 or 13 of the Periodic System
    • C07F5/02Boron compounds
    • C07F5/022Boron compounds without C-boron linkages
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K49/00Preparations for testing in vivo
    • A61K49/001Preparation for luminescence or biological staining
    • A61K49/0013Luminescence
    • A61K49/0017Fluorescence in vivo
    • A61K49/0019Fluorescence in vivo characterised by the fluorescent group, e.g. oligomeric, polymeric or dendritic molecules
    • A61K49/0021Fluorescence in vivo characterised by the fluorescent group, e.g. oligomeric, polymeric or dendritic molecules the fluorescent group being a small organic molecule
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K49/00Preparations for testing in vivo
    • A61K49/001Preparation for luminescence or biological staining
    • A61K49/0013Luminescence
    • A61K49/0017Fluorescence in vivo
    • A61K49/0019Fluorescence in vivo characterised by the fluorescent group, e.g. oligomeric, polymeric or dendritic molecules
    • A61K49/0021Fluorescence in vivo characterised by the fluorescent group, e.g. oligomeric, polymeric or dendritic molecules the fluorescent group being a small organic molecule
    • A61K49/0039Coumarin dyes
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    • C09K11/00Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/06Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
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    • C09K2211/00Chemical nature of organic luminescent or tenebrescent compounds
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    • C09K2211/1018Heterocyclic compounds
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    • C09K2211/1029Heterocyclic compounds characterised by ligands containing one nitrogen atom as the heteroatom
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    • C09K2211/00Chemical nature of organic luminescent or tenebrescent compounds
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    • C09K2211/1025Heterocyclic compounds characterised by ligands
    • C09K2211/1044Heterocyclic compounds characterised by ligands containing two nitrogen atoms as heteroatoms
    • C09K2211/1055Heterocyclic compounds characterised by ligands containing two nitrogen atoms as heteroatoms with other heteroatoms
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    • C09K2211/00Chemical nature of organic luminescent or tenebrescent compounds
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    • C09K2211/1025Heterocyclic compounds characterised by ligands
    • C09K2211/1088Heterocyclic compounds characterised by ligands containing oxygen as the only heteroatom

Abstract

The present invention relates to one kind FRET molecule and its synthetic method based on fluorine boron pyrroles and cumarin.When prepared by the FRET molecule, first it is stirred at room temperature to obtain yellow solid in thionyl chloride as raw material using coumaric acid.Then in dichloromethane solution, yellow solid is further reacted with propargyl ammonia and triethylamine stirring at normal temperature, the product column chromatography for separation obtained after filtering purifies to obtain yellow solid.It further reacts to obtain final goal compound with fluorine boron pyrroles, cuprous iodide and palladium catalyst.The compound has preferable chemistry, photostability, has big stoke shift, is suitable for the intracorporal fluorescence detection of biology, can avoid autofluorescence interference in organism.This kind FRET molecule prepared by the present invention can be used for the fields such as life science and Supramolecular photochemistry, and application prospect is extensive.

Description

FRET molecule and its synthetic method of the one kind based on fluorine boron pyrroles and cumarin
Technical field
The present invention relates to one kind FRET molecule based on cumarin and fluorine boron pyrroles's fluorogen.
Background technique
Fluorescence resonance energy transfer (Fluorescence resonance energy transfer, FRET) refers to two In a different fluorogen, (generally less than when the distance between Spectral matching and two fluorogens is suitable), Ke Yiguan The phenomenon that fluorescent energy is shifted from donor to receptor is observed, i.e., when being excited with the excitation wavelength of donor, the glimmering of receptor can be observed Light emitting.If acceptor fluorescence quantum yield is zero, energy transfer fluorescent occurs and is quenched;If acceptor is also a kind of fluorescence Emitter then shows the fluorescence of receptor.Molecule with fluorescence resonance energy transfer is widely used at present, it can be used for Fluorescent molecule detection, it is small to make up conventional fluorescent probe molecule stoke shift, it is lacked vulnerable to what autofluorescence in organism interfered It falls into;The light trapping antenna that solar energy is converted into chemical energy can also be used as, because more fluorogens make its absorption spectrum significantly It widens.Fluorescence resonance energy transfer (FRET) molecule has manifested most important in the fields such as life science and Supramolecular photochemistry Irreplaceable effect.Therefore, the exploitation for being able to achieve the FRET molecule of fluorescence resonance energy transfer is the previous urgent need of mesh It wants.But building is not easy to based on the molecule of fluorescence resonance energy transfer (FRET), on the one hand to consider fluorogenic donor and receptor Matching degree;On the other hand to consider the connection type and connection distance of two fluorogens.
Fluorine boron pyrroles's fluorochrome has very excellent photochemistry physical property, shows the following aspects: tool There is higher molar extinction coefficient;High fluorescence quantum yield;The spectral property of dyestuff is highly stable, is not easily susceptible to solvent polarity With the influence of pH value;The fluorescence spectrum peak width of dyestuff is relatively narrow, so that dyestuff detects more when being applied to analysis field It is sensitive;Dyestuff photostability with higher, will not because of stimulated luminescence during fluorescence analysis irradiation and lead to dyestuff knot The rapid light degradation of structure, to ensure that the variation of spectral signal only derived from examined sample.These excellent properties make The fluorogen is swift and violent in the application development of organic functional material, has become develop one of fluorogen of greatest concern at present.Tonka-bean Element is due to special molecular structure, available to have difference by the modification of different location substituent group on coumarin ring The absorption of range and fluorescence emission wavelengths, to show different colours and the derivative with strong fluorescence, in addition to being used as extensively Outside fluorescent whitening agent, fluorescent dye and laser dye, since with preferable photoelectric properties, coumarin kind compound goes back quilt in the recent period Applied to the fields such as fluorescence probe in organic photosensitive dyestuff and the bioprotein research of electroluminescent material solar battery.
Most important also most crucial part is exactly the selection of donor and receptor, fluorogen fluorine boron in fluorescence resonance energy transfer Pyrroles and the excellent photochemistry and photophysical property of cumarin make it be very suitable for as FRET molecule for receptor, and it is fragrant Legumin launch wavelength is at 450-500 nanometer one than wider range, and fluorine boron pyrroles fluorogen has just in this position Therefore strong absorption finds a suitable connection type and connection distance has connected cumarin with fluorine boron pyrroles's fluorogen To make it possible to achieve the efficient transfer of fluorescence resonance energy.
Summary of the invention
The present invention provides one kind FRET molecule based on fluorine boron pyrroles and cumarin, general structure is such as shown in (I):
Wherein, R=-H or
The second object of the present invention is to provide following method to realize:
A, 7- dimethylamino -2- oxygen -2H-3- coumaric acid is dissolved in SOCl2In solution.The reaction solution is in nitrogen protection Under the conditions of be stirred at room temperature 3 hours.Filtering, ether washing precipitating, obtains yellow solid.It is not further processed and is immediately available in next step Reaction.
B, the yellow solid that a step obtains is dissolved in dichloromethane solvent, the propargyl ammonia of 1.1 times of moles is added With the triethylamine of 2.2 times of moles, stirring at normal temperature, TLC determines reaction end, filtering, vacuum rotary steam.Column chromatography for separation obtains yellow Solid product.
C, the yellow solid product for 1.2 times of moles for obtaining fluorine boron azole derivatives and b step, 0.05 times of mole Cuprous iodide, 0.02 times of mole dichloro two (triphenyl phosphorus) palladium be added to the in the mixed solvent of triethylamine and tetrahydrofuran, After argon gas protects 40 DEG C of oil bath heating, reaction 2 hours.Cooling, filtering, filter cake is repeatedly washed with methylene chloride, and merging filtrate subtracts Pressure distillation.Obtained solid uses column chromatography (distillate is methylene chloride), obtains target product.
Further, the volume ratio of both mixed solvents of triethylamine and tetrahydrofuran described in step c is 1:4.
Above compound to prepare reaction equation as shown in Figure 1.
FRET molecule of the invention can be used for the fluorescent molecular probe for realizing fluorescence detection in organism, it is also possible to make too The trapping molecule of solar ray energy can have wider absorption in absorption spectrum.
The feature that FRET molecule of the invention has is as follows:
The FRET molecule excites under the excitation wavelength of 400nm, can launch at the green fluorescence or 620nm of 510nm Red fluorescence.Insensitive to solvent polarity, chemical stability is good.
FRET molecule of the invention is the molecule based on fluorescence resonance energy transfer, while including two kinds of fluorogens, wherein One fluorogen as donor, a fluorogen as receptor, the absorbing wavelength energy of the launch wavelength of donor and receptor With the connection type in range, and between two fluorogens and apart from moderate, when being possible to realize excited donor molecule, only Having the fluorescence of receptor can emit.Therefore, the realization key for synthesizing this FRET molecule is to need to reasonably select for acceptor fluorescence Group is allowed to collaboration matching, is possible to the transfer for realizing fluorescence resonance energy.The present invention has synthesized collection fluorescein and fluorine boron pyrroles The FRET molecule of two different chromophories, the molecule have preferable chemistry, photostability, can be to avoid cell or group The interference for the autofluorescence knitted has big stoke shift, small by solvent effect;FRET molecule in the present invention is based on glimmering Photoresonance energy transfer mechanism matches the energy of two fluorogens, efficiently realizes fluorescence energy by rationally adjusting connection type Amount transfer.Such molecule is suitable for biological vivo detection fluorescence probe, is used for the fields such as life science and Supramolecular photochemistry, application Prospect is extensive.
Detailed description of the invention
Fig. 1 is FRET molecule synthesis route of the present invention.
Fig. 2 is that the embodiment of the present invention 1 prepares fluorescent molecule in MCF-7 (breast cancer cell) interior laser confocal imaging; MCF-7 cell cultivates 30min under 1 fluorescent molecule of embodiment (5 μM) room temperature, is respectively 405nm, launch wavelength in excitation light source In 450 ± 15nm and 514 ± 15nm fluorescent emission;
Wherein (a) is the overlapping of bright field and 514 ± 15nm fluorescent emission;It (b) is 450 ± 15nm fluorescent emission;(c) it is 514 ± 15nm fluorescent emission;(d) MCF-7 cell under 2 fluorescent molecule of embodiment (5 μM) room temperature cultivate 30min after, in bright field Under picture.
Fig. 3 is that the embodiment of the present invention 2 prepares fluorescent molecule in the intracellular laser confocal imaging of MCF-7;MCF-7 cell is used Cultivate 30min under embodiment 2 (5 μM) room temperature, respectively excitation light source be 405nm, launch wavelength 450 ± 15nm and 590 ± 25nm fluorescent emission;
The wherein overlapping of (a) bright field and 590 ± 25nm fluorescent emission;It (b) is 450 ± 15nm fluorescent emission;It (c) is 590 ± 25nm fluorescent emission;(d) MCF-7 cell under 2 fluorescent molecule of embodiment (5 μM) room temperature cultivate 30min after, under bright field Picture.
Specific embodiment
Embodiment 1
The synthesis of a compound 2 (7-N, N- dimethylamino -2- oxygen -2H-3- tonka-bean acyl chlorides): 7- dimethylamino -2- Oxygen -2H-3- coumaric acid (2.62g, 5mmol) is added to 20mL SOCl2In solution.Reaction solution room temperature under the conditions of nitrogen protection Stirring 3 hours.Filtering, ether washing precipitating, obtains yellow solid 2.13g, yield 76%.Immediately after for anti-in next step It answers.
B compound 3: in the dichloromethane solution of 10 milliliters of compounds 2, addition propargyl ammonia (191mg, 0.848mmol, M=225) and triethylamine (248ml, 1.69mmol), stirring at normal temperature, TLC determine reaction end, filter, decompression Revolving.Column chromatography for separation obtains yellow solid product.1HNMR(CDCl3) δ=9.00 (s, 1H, NH) .8.70 (s, 1H, ArH), 7.43 (d, 1H, J=8.8Hz, ArH), 6.65 (d, J=8.8Hz, ArH), 6.50 (s, 1H, ArH), 4.23 (s, 2H, CH2),3.46 (q, 4H, J=7.2Hz, CH2CH3), 2.25 (s, 1H, CH), 1.24 (t, 6H, J=7.2Hz, CH2CH3).TOF MS calcd for C17H18N2O3 298.1317,found 298.1324
The synthesis of c compound 4: by compound 3 (158mg, 0.53mmol), 8- (4- iodophenyl) fluorine boron pyrroles (200mg, 0.44mmol), cuprous iodide (3.5mg, 0.022mmol), dichloro two (triphenyl phosphorus) palladium (6mg, 0.0086mmol) It is added in the mixed solvent 5mL (v:v=1:4) of triethylamine and tetrahydrofuran, argon gas protects 40 degree of oil bath heating, reacts two hours Afterwards.Cooling, filtering, filter cake is repeatedly washed with methylene chloride, merging filtrate, vacuum distillation.Obtained solid, which uses column chromatography, (to be evaporated Liquid is methylene chloride out), obtain solid 169mg.Yield 62%.1HNMR(CDCl3) δ=9.10 (s, 1H, NH) .8.74 (s, 1H, ), ArH 7.57 (d, 2H, J=8.0Hz, ArH), 7.44 (d, 1H, J=9.2Hz, ArH), 7.23 (d, 2H, J=8.0Hz, ArH), 6.65 (d, 1H, J=9.2Hz, ArH), 5.98 (s, 2H, ArH), 4.50 (s, 2H, CH2), 3.46 (q, 4H, J=7.2Hz, CH2CH3),2.55(s,1H,CH3),1.40(s,1H,CH3), 1.25 (t, 6H, J=7.2Hz, CH2CH3).TOF MS calcd for C36H35BF2N4O3Na 643.2668,found 643.2653
Embodiment 2
By the compound (156mg, 0.53mmol, M=298) generated in example 1b and fluorine boron azole derivatives B-2 (275mg, 0.44mmol, M=626), cuprous iodide 3.5mg (0.022mmol), (triphenyl phosphorus) the palladium 6mg of dichloro two (0.0086mmol) in The mixing of triethylamine and tetrahydrofuran is molten=agent 5mL (v:v=1:4) in, argon gas protects 40 degree of oil bath heating, reaction two hours Afterwards.Cooling, filtering, filter cake is repeatedly washed with methylene chloride, merging filtrate, vacuum distillation.Obtained solid, which uses column chromatography, (to be evaporated Liquid is methylene chloride out), obtain solid 157mg.Yield 45%.TOF MS calcd for[C50H43BF2N4O3+Na] 819.3293,found 819.3250。

Claims (1)

1. the synthetic method of a kind of FRET molecule based on fluorine boron pyrroles and cumarin, which comprises the steps of:
A, 7- dimethylamino -2- oxygen -2H-3- coumaric acid is dissolved in SOCl2In solution, room temperature is stirred under the conditions of nitrogen protection It mixes 3 hours, filters, ether washing precipitating obtains yellow solid, is not further processed and is immediately available for reacting in next step;
B, the yellow solid that a step obtains is dissolved in dichloromethane solvent, be added 1.1 times of moles propargyl ammonia and The triethylamine of 2.2 times of moles, stirring at normal temperature, TLC determine reaction end, and filtering, vacuum rotary steam, it is solid that column chromatography for separation obtains yellow Body product;
C, the yellow solid product for 1.2 times of moles for obtaining fluorine boron azole derivatives and b step, 0.05 times of mole iodine Change the in the mixed solvent that cuprous, 0.02 times of mole dichloro two (triphenyl phosphorus) palladium is added to triethylamine and tetrahydrofuran, argon gas 40 DEG C of oil bath heating of protection, cooling after reaction 2 hours, filtering, filter cake is repeatedly washed with methylene chloride, merging filtrate, and decompression is steamed It evaporating, obtained solid uses column chromatography, and distillate is methylene chloride, obtain the structure that target product has such as formula (I):
(I)
Wherein, R=- H or
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CN109776588B (en) * 2019-01-29 2021-06-18 大连大学 Rare earth europium complex-based ratiometric fluorescence sensor platform and preparation method thereof
CN110105381B (en) * 2019-06-11 2021-10-29 青岛科技大学 Preparation and application of beta-diketone boron fluoride fluorescent dye with coumarin as skeleton
CN110143977B (en) * 2019-06-12 2021-09-17 青岛科技大学 Coumarin heteroboron difluoride complex fluorescent dye and application thereof
CN110128453B (en) * 2019-06-17 2021-06-01 大连大学 Preparation method and application of white organic electroluminescent material based on triphenylamine and rare earth complex
CN110183478B (en) * 2019-07-11 2021-07-23 青岛科技大学 Synthesis and application of cyanine, coumarin and dicarbonyl boron fluoride hybrid fluorescent dye
CN113402655B (en) * 2021-06-30 2022-05-10 大连大学 Polymer universal fluorescence platform for FRET fluorescent probe donor and application thereof

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