CN105732723B - A kind of ruthenium (II) multi-pyridine ligand and its preparation and application - Google Patents

A kind of ruthenium (II) multi-pyridine ligand and its preparation and application Download PDF

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CN105732723B
CN105732723B CN201610157250.5A CN201610157250A CN105732723B CN 105732723 B CN105732723 B CN 105732723B CN 201610157250 A CN201610157250 A CN 201610157250A CN 105732723 B CN105732723 B CN 105732723B
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ruthenium
complex
tetra
ligand
serobilas
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CN105732723A (en
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尹盼盼
尚英辉
姚天明
石硕
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Tongji University
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    • C07FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F15/00Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table
    • C07F15/0006Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table compounds of the platinum group
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    • C07F15/0053Ruthenium compounds without a metal-carbon linkage

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Abstract

The present invention relates to ruthenium (II) multi-pyridine ligands, the complex is with 2 (1,10 ferrosin, 5 base) benzimidazole) it is main ligand, complex is with 2,2 ' bipyridyls or 1,10 ' phenanthrolines are co-ligand, and the chemical formula of the complex is [Ru (bpy)2pbi]2+Or [Ru (phen)2pbi]2+;The complex is made by following steps:(1) pbi is prepared;(2) ruthenium metallic compound of the synthesis with co-ligand group;(3) target ruthenium (II) multi-pyridine ligand is synthesized;(4) the isolated product of silica gel column chromatography is used;The complex is used to prepare the drug for the stability that tetra- serobilas of telomere G are combined, improved with tetra- serobilas of telomere G.Compared with prior art, the present invention prepares ruthenium (II) multi-pyridine ligand has identification, combination and stabilization to tetra- serobilas of telomere G, inhibits telomerase activation, regulates and controls expression of proto-oncogenes, theoretical foundation is provided for the screening of anticancer drug.

Description

A kind of ruthenium (II) multi-pyridine ligand and its preparation and application
Technical field
The present invention relates to metal complexs, and in particular to a kind of ruthenium (II) multi-pyridine ligand and its preparation and application.
Background technology
Nucleic acid is the material base of biological heredity.We are not only facilitated for the research of nucleic acid and explores the origin of life, And it is also particularly important when solving gene-associated diseases.Other than traditional double-spiral structure, there is also many for nucleic acid Non-classical configuration, wherein most noticeable surely belong to tetra- serobilas of G- (G4) structure, it is that people pass through chemical interference to be primarily due to it To adjust the Effective target site of biological function.G4 is a kind of nucleic acid structure of four chains, is by passing through Huo Shi between G bases (Hoogsteen) the G- tetrads that pairing is formed are accumulated, this assembling phenomenon is extremely general in the nucleic acid sequence rich in G Time.Since rich G sequence is in many functional gene regions (telomere of such as eukaryocyte, the promoter of certain important proto-oncogenes) Middle rich content, therefore G4 is considered as the critical medication target spot for inhibiting telomerase activation and regulating and controlling expression of proto-oncogenes.Research It has been shown that, the human body telomeric dna (Tel22, also known as 22AG) containing 22 bases can be under different alkali metal ion existence conditions Form four serobilas of various configuration.In Na+In ion buffer solution, 22AG uses antiparallel G4 conformations, and in K+Ion buffer solution In, it but shows and parallel/antiparallel mixes type conformation.
Ruthenium outermost layer has 4d75s1Structure, common valence state is Ru (I), Ru (II) and Ru (III), and is easily formed six The complex of coordination.Transition metal ruthenium (II) multi-pyridine ligand has unique DNA binding abilities, good electrochemistry, light Chemistry, Photophysics and abundant fluorescent property, and there is hypotoxicity, easy the characteristics of absorbing and easily draining.Specially such as China 102464676 A of sharp CN disclose a kind of ruthenium (II) multi-pyridine ligand, and ruthenium (II) multi-pyridine ligand is with two pyridines [3,2-a, 2 ', 3 '-c] and azophenlyene -11,12- imidazoles are main ligand, using bipyridyl or phenanthroline as the ruthenium of assistant ligand (II) multi-pyridine ligand, ruthenium (II) multi-pyridine ligand are used for tetra- serobila DNA molecular photoswitches of G-.But the compound is only used In the searching of G4, for being combined with G-4 tetrads, for inhibiting telomerase activation and regulation and control expression of proto-oncogenes, there is no fine Effect.
Invention content
It is insighted to telomeric dna that it is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of Ruthenium (II) multi-pyridine ligand of other ability, binding ability and stabilizing power and its preparation and application.
The purpose of the present invention can be achieved through the following technical solutions:A kind of ruthenium (II) multi-pyridine ligand, the cooperation Object is with 2- (1,10- ferrosin -5- bases)-benzimidazole) it is main ligand, complex is with 2,2 '-bipyridyls or 1,10 '-adjacent luxuriant and rich with fragrance hello Quinoline is co-ligand, and the chemical formula of the complex is [Ru (bpy)2pbi]2+Or [Ru (phen)2pbi]2+, the complex Structural formula is:
Wherein, 2 bpy, 2 '-bipyridyls, 1,10 '-phenanthrolines of phen, pbi are 2- (1,10- ferrosin -5- bases) - Benzimidazole).
Wherein Ru is divalent in the complex, therefore the complex is ruthenium (II) multi-pyridine ligand.
The synthesis step for the ligand that the present invention uses is simple, and yield is high so that production cost substantially reduces, in addition, master matches For body using the benzimidazole of synthesis, which is exactly many pharmaceutical intermediates, toxicity smaller for other opposite ligands, medical latent In property higher.
A kind of preparation method of ruthenium as described above (II) multi-pyridine ligand, which includes following steps:
(1) synthesis of pbi:By 1:1:2 molar ratio weighs o-phenylenediamine, 5- aldehyde radicals Phen and sodium hydrogensulfite, DMF is added to dissolve to obtain solution, is heated at reflux until starting to precipitate in solution, it is heavy to obtain yellow for addition water into solution Form sediment, yellow mercury oxide is filtered, washing, it is dry after up to pbi, for use;
(2) 1 is pressed:1:2 molar ratio weighs RuCl3·3H2O, a chloride hydrate lithium and co-ligand are added DMF and dissolve to obtain Solution is heated at reflux to obtain solidliquid mixture under the protection of protection gas, and acetone is added after being cooled to room temperature, and stirring keeps solid equal Even dispersion preserves 15~30h at -25~-4 DEG C, and suction filtration obtains purple black crystal, for use;
(3) purple black crystal obtained by pbi obtained by step (1) and step (2) is dissolved in the mixed solution of ethylene glycol and water, It protects under the protection of gas in being heated at reflux, then cools to room temperature, water dilution is added, suction filtration obtains filtrate, in gained filtrate Hexafluoro is added and closes ammonium phosphate or sodium perchlorate, stirs to get precipitation, stands, filter, washing, vacuum drying obtains crude product;
(4) crude product obtained by step (3) is detached with silica gel chromatography, it is ruthenium to obtain powdery product after dry (II) multi-pyridine ligand.By ruthenium (II) multi-pyridine ligand made from above-mentioned reaction condition, yield is high.
The synthesis step of the present invention is simple and practicable, only needs a step that can synthesize main ligand, and without purification, yield is high.Compared with Preceding ligand synthesizes simple and practicable reduction production cost.
Step (1) volume that water is added into solution is 5~10 times of liquor capacity, and step flows back described in (1) The temperature of heating is 120~180 DEG C, and the time being heated at reflux is 5~12h.
Step (2) described co-ligand includes bipyridyl or phenanthroline.
Step (2) amount that acetone is added is 4~6 times of the solidliquid mixture, and step is heated at reflux described in (2) Temperature be 130~150 DEG C, the time being heated at reflux be 5~10h.
Step (2), step (3) the protection gas are selected from argon gas, nitrogen or helium.
Step (3) ethylene glycol and H2The in the mixed solvent ethylene glycol and H of O2The molar ratio of O is 7:1, the hexafluoro of addition It is 1g to close the ratio between the quality of ammonium phosphate or sodium perchlorate and the mole of ethylene glycol:(15~20) mol, the washing are to use successively Water and ether wash at least 3 times, and it is 110~130 DEG C that temperature is heated at reflux described in step (3), be heated at reflux the time be 5~ 8h。
Step (4) described eluant, eluent with used in silica gel chromatography is acetonitrile and toluene, and the ratio of acetonitrile and toluene is second Nitrile:Toluene=3:1.
A kind of application of ruthenium as described above (II) multi-pyridine ligand, the complex be used to prepare for telomere G- tetra- Serobila in conjunction with, improve tetra- serobilas of telomere G- stability drug.
The action principle of the complex is as follows:It states ruthenium (II) multi-pyridine ligand and uses pi-pi accumulation with tetra- serobilas of telomere G- The mode of action interaction, in normal body cell, telomere can shorten with the division of cell, when its length reaches Cell will become feeble and die when critical point.And in most of tumour cell and cancer cell, telomere is lengthened by Telomerase, is made up Its loss in normal cell, makes cancer cell infinitely divide and is able to immortality.Studies have shown that the G4 that telomerase is formed can Effectively inhibit the activity of Telomerase so that G4 becomes the important target spot of anticancer drug.So can stablize the molecules of G4 structures at For potential anticancer drug.
Tetra- serobilas of telomere G- are tetra- serobilas of telomere G- of people, and tetra- serobilas of telomere G- include 22 bases.
The application of obtained ruthenium (II) complex can be by UV spectrum titration, obtained spectroscopic data peak value display Reduce and with red shift, illustrates that with tetra- serobila DNA of telomere G- combination occurs for ruthenium (II) complex.
Ruthenium (II) complex puies forward tetra- serobila melting temperatures of telomere G- by the DNA melting temperatures determination experiment of PCR instrument Height illustrates that complex can stablize tetra- stranded structures of G-.
Designed ruthenium (II) complex synthesized is had detected to G- using means such as double light path uv-vis spectra and PCR instruments Four serobila binding abilities and stabilizing power.
The measurement of complex and the uv-vis spectra of DNA effects uses double beam system, instrument Perkin 40 type ultraviolet-uisible spectrophotometers of Elmer lambda Bio, cuvette are 10mm x10mm quartz colorimetric utensils, scanning range 230-600nm.It is stronger to show that ruthenium (II) complex and tetra- serobilas of telomere G- have by the red shift occurred in ultraviolet spectra and blue shift Binding ability
It carries out applying FRET technologies in PCR instrument (BIORAD icycler (iQ5)), tests ruthenium (II) complex to glimmering Signal DNA F22T (the melting temperature T of sequence (FAM- [(G3T2A) 3AG3]-TAMRA)mThe change of value.To reflect not The difference that tetra- serobila DNA Thermodynamically stables of G- are acted on complex.
Compared with prior art, beneficial effects of the present invention are embodied in:
(1) present invention passes through the apparent red shift of ultraviolet chromatogram and hypochromic effect and the raised description of test of PCR temperature G4 and DNA has apparent interaction, and can stablize the structure of G4, due to the more difficult destruction of the rigid structure of G4, so pushing away The mode of action for surveying the two is the pattern of outside stacking binding;
(2) synthesis step of ligand is simple, and yield is high, the originally many pharmaceutical intermediates of benzimidazole of synthesis, institute With toxicity for other opposite ligands may smaller, medical potentiality higher.
Description of the drawings
Fig. 1 is 1 gained complex of embodiment and ultra-violet absorption spectrum of tetra- serobilas of telomere G- in potassium ion buffer solution Figure;
Fig. 2 is 1 gained complex of embodiment and ultra-violet absorption spectrum of tetra- serobilas of telomere G- in sodium ion buffer solution Figure;
Fig. 3 is that the melting temperature experiment in potassium ion buffer solution is bent with tetra- serobilas of telomere G- for 1 gained complex of embodiment Line chart;
Fig. 4 is 2 gained complex of embodiment and ultra-violet absorption spectrum of tetra- serobilas of telomere G- in potassium ion buffer solution Figure;
Fig. 5 is 2 gained complex of embodiment and ultra-violet absorption spectrum of tetra- serobilas of telomere G- in sodium ion buffer solution Figure;
Fig. 6 is that the melting temperature experiment in sodium ion buffer solution is bent with tetra- serobilas of telomere G- for 2 gained complex of embodiment Line chart.
Specific implementation mode
It elaborates below to the embodiment of the present invention, the present embodiment is carried out lower based on the technical solution of the present invention Implement, gives detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following implementation Example.
Embodiment 1
A kind of ruthenium (II) multi-pyridine ligand, the complex is with 2- (1,10- ferrosin -5- bases)-benzimidazole) based on match Body, for complex with 2,2 '-bipyridyls for co-ligand, the chemical formula of the complex is [Ru (bpy)2pbi]2+, the cooperation The structural formula of object is:
It is denoted as a1
The complex is through the following steps that be made:
1. synthetic ligands pbi (pbi=2- (1,10-Phenanthrolin-5-yl)-benzo [d] imidazole) is obtained Yellow powder:0.001mol o-phenylenediamines are added into single neck flask, 0.001mol 5- aldehyde radicals Phens and 0.002mol are sub- Niter cake, and 3mL DMF dissolvings are added, 6 hours are heated to reflux at 150 DEG C, obtain brown solution, and have a small amount of precipitation production It is raw.Into reaction solution plus 30mL water has a large amount of yellow mercury oxides to generate, and filters, filter cake is washed with water for several times, be dried in vacuo.Obtain Huang Color powder 0.255g, yield 86%.
2. 6mmol ruthenium trichlorides (RuCl is added in three-neck flask3·3H2O), mono- chloride hydrate lithiums of 6mmol, and 12mmol bipyridyls are dissolved in 10ml DMF, are heated to reflux under protection of argon gas in 140 DEG C 8 hours.It is cooled to room temperature, adds 50mL acetone, stirred with glass bar it is evenly dispersed to bottom solid, set refrigerator freezing stay overnight.Filter to obtain atropurpureus solid.By institute There is the ethyl alcohol that 150mL is added in solid to be heated to reflux 0.5 hour, be cooled to room temperature, suction filtration obtains atropurpureus crystallite, is washed till with ice water It is close colourless, it is dry, obtain cis- [Ru (bpy)2Cl2]·2H2O.It is calculated with bipyridyl, yield about 65%.
3. accurately weighing 0.4mmol cis- [Ru (bpy)2Cl2]·2H2The product of O, 0.229g (0.6mmol) step 1, It is dissolved in 35mL ethylene glycol and 5mL H2The mixed solvent of O flows back 6 hours in 120 DEG C under protection of argon gas.Reaction starts solution In atropurpureus, gradually become red as reaction tends to perfect solution color.It is cooled to room temperature after reaction, adds 50mL water Dilution filters and removes unreacted ligand, obtains claret clear filtrate.2g hexafluoros are added into filtrate and close ammonium phosphate, stirring obtains Peony precipitates, and after standing a night, filters, washs filter cake for several times with water and ether respectively, is dried in vacuo.Crude product is crossed 200 ~300 mesh neutral alumina columns are detached, with acetonitrile/toluene (3:1, v/v) it elutes, collects intermediate red zone eluent, use Preservative film sealing, which is placed on draught cupboard, makes solvent volatilize, and can obtain product about 0.2~0.3g, yield about 50%.
To gained complex carried out hydrogen spectrum (1H NMR) and electrospray ionization mass spectrum (ES-MS) characterization, it is as a result as follows:
1H-NMR(DMSO-d6, 400Hz):13.46 (1H, s), 10.08 (1H, d), 8.88 (6H, m), 8.23 (4H, dd), 8.13 (2H, t), 8.01 (1H, dd), 7.96 (1H, dd), 7.85 (3H, t), 7.65 (5H, m), 7.34 (4H, dd, TOF-MS for a1:m/z 709.1(M-2PF6- H), 355.07 (M-2PF6/2)。
Gained ruthenium (II) multi-pyridine ligand is used to be combined with tetra- serobilas of telomere G-, tetra- chains of telomere G- can be improved The stability of body regulates and controls expression of proto-oncogenes to inhibit telomerase activation.Tetra- serobilas of telomere G- are tetra- chains of telomere G- of people Body, tetra- serobilas of telomere G- include 22 bases.
Ruthenium (II) multi-pyridine ligand with tetra- serobilas of telomere G- for including the following steps:
(1) Tris-HCl buffer solutions:
Buffer solution A:10mM Tris, 100mM KCl, pH=7.0;
Buffer solution B:10mM Tris, 100mM NaCl, pH=7.0;
General preparation method:0.303g Tris salt accurately is weighed, 1.865g KCl or 1.460g NaCl are sterilized with 60mL Triple distillation water is completely dissolved, and pH value is slowly adjusted with dilute hydrochloric acid to 7.0, is transferred to 250ml volumetric flasks, fixed with triple distillation water Hold, it is spare after mixing.
(2) phosphate buffer:
Buffer solution C:10mM KH2PO4-K2HPO4, 100mM KCl, pH=7.0.
Preparation method:0.174g dipotassium hydrogen phosphate trihydrates and 0.746g KCl are taken with electronic balance scale, with specification specification The KCl of a concentration of 100mM, the K of 10mM are configured to for the volumetric flask and triple distillation water of 100mL2HPO4Solution;Weigh 0.136g Potassium dihydrogen phosphate and 0.746gKCl are configured to the KCl of a concentration of 100mM, the KH of 10mM with above-mentioned same preparation method2PO4 Solution.Above-mentioned liquor capacity 61.5mL dipotassium hydrogen phosphate solutions and 38.5mL potassium dihydrogen phosphates is taken to be mutually mixed, you can To the potassium phosphate buffer solution of the 10mM of the KCl containing a concentration of 100mM.
(3) preparation of complex solution:
Accurately weighing 2~3mg complexs, (depending on complex molecule amount, prepared ruthenium complex is expected concentration herein It is 200 μM, volume 10mL, is 15mL Corning centrifuge tubes with container, so the theoretical value that needs weigh is:Molecule Amount/1000*2mg), 50-100 μ L DMSO dissolvings are first used, then 10mL is settled to get 200 μM of complex deposit with pure water Liquid.
(4) measurement of the preparation of DNA solution and concentration:
Tetra- serobila DNA (22AG) of G-
Preparation method:The 22AG DNA for taking about 10OD are dissolved with the buffer solution A and B of corresponding volume, are added with water-bath after sealing Heat is to 90 DEG C and is kept for 5 minutes, is put into 4 DEG C of refrigerators and refrigerates 24 hours or more after being slowly cooled to room temperature, spare.
The application of obtained ruthenium (II) complex can be by UV spectrum titration, and steps are as follows:
Take the complex storing solution (200uM) of 70uL, 2000uL buffer solution Tris-KCl pH 7.0 or Tris-NaCl pH 7.0, in 10mm × 10mm quartz colorimetric utensils, shake mixing, are placed in ultraviolet light absorption photometer sample cell.Reference cell, which is put, to be contained The buffer solution display scanning recording curve of 2000uL Tris-KCl pH 7.0 or Tris-NaCl pH 7.0.Later respectively to sample The 22AG DNA solutions (100uM Tris salt buffers) for adding 10uL in product pond and reference cell add mixing, scanning record gained Curve.The titration of repetitive operation at least four times and no longer change, illustrate that titration reaches saturation.Preserve data, Origin mappings, knot Fruit is as depicted in figs. 1 and 2.
Spectroscopic data peak value display has apparent hypochromic effect and red shift, illustrates that complex and tetra- serobila DNA effects of G- are strong It is strong.But be between being inserted into two G- tetrads of tetra- serobilas of G- for the ligand of these four ruthenium complexes it is extremely difficult, This is because four serobilas be a rigidity and stablize structure, if to destroy its structural intergrity need to consume it is relatively high Energy.Therefore speculate that complex is to be acted on tetra- serobilas of G- by being stacked into tetra- serobila distal portions of G-, that is, be called outer Portion's accumulation mode.
Ruthenium (II) complex is measured by the DNA melting temperatures of PCR instrument, and concrete operation step is as follows:
Using FRET technologies, complex obtained by the present embodiment is tested to fluorescent label DNA F22T (sequence (FAM- [(G3T2A) 3AG3]-TAMRA) melting temperature TmThe change of value.To reflect Different Complex to tetra- serobila DNA heat of G- The difference of mechanics stabilization.FRET experiments carry out in PCR instrument, use dipotassium hydrogen phosphate or phosphorus containing 100mM KCl F22T (250nM) and a certain concentration that annealing forms tetra- serobilas of G- is added in sour disodium hydrogen buffer solution (10mM, pH=7.0) The complex of ratio, it is common to be incubated 1 hour, carry out TmValue measures as shown in Figure 3.
The result shows that in the presence of having complex (0.5uM G4,100mM NaCl), the Tm values of the F22T of tetra- serobilas of G- compared with It is small;With the addition of complex and the increase of concentration, the Tm values of F22T gradually increase.Ultimately joining a concentration of 7 μM of complex makes Tetra- serobila Tm values of G- increase 3 DEG C, therefore, under potassium buffer solution complex to the stabilization of tetra- serobilas of G- be with concentration according to Rely property.
Embodiment 2
A kind of ruthenium (II) multi-pyridine ligand, the complex is with 2- (1,10- ferrosin -5- bases)-benzimidazole) based on match Body, for complex with 1,10 '-phenanthroline for co-ligand, the chemical formula of complex is [Ru (phen)2pbi]2+, the complex Structural formula be:
It is denoted as a2
The complex is through the following steps that be made:
1. synthetic ligands pbi (pbi=2- (1,10-Phenanthrolin-5-yl)-benzo [d] imidazole) is obtained Yellow powder:0.001mol o-phenylenediamines are added into single neck flask, 0.001mol 5- aldehyde radicals Phens and 0.002mol are sub- Niter cake, and 3mL DMF dissolvings are added, 6 hours are heated to reflux at 150 DEG C, obtain brown solution, and have a small amount of precipitation production It is raw.Into reaction solution plus 30mL water has a large amount of yellow mercury oxides to generate, and filters, filter cake is washed with water for several times, be dried in vacuo.Obtain Huang Color powder 0.255g, yield 86%.
2. 6mmol ruthenium trichlorides (RuCl is added in three-neck flask3·3H2O), mono- chloride hydrate lithiums of 6mmol, and 12mmol Phens are dissolved in 10ml DMF, are heated to reflux under protection of argon gas in 140 DEG C 8 hours.It is cooled to room temperature, adds 50mL acetone, stirred with glass bar it is evenly dispersed to bottom solid, set refrigerator freezing stay overnight.Filter to obtain atropurpureus solid.By institute There is the ethyl alcohol that 150mL is added in solid to be heated to reflux 0.5 hour, be cooled to room temperature, suction filtration obtains atropurpureus crystallite, is washed till with ice water It is close colourless, it is dry.It is calculated with bipyridyl, yield about 65%.
3. accurately weighing 0.4mmol cis- [Ru (bpy)2Cl2]·2H2The product of O, 0.229g (0.6mmol) step 1, It is dissolved in 35mL ethylene glycol and 5mL H2The mixed solvent of O flows back 6 hours in 120 DEG C under protection of argon gas.Reaction starts solution In atropurpureus, gradually become red as reaction tends to perfect solution color.It is cooled to room temperature after reaction, adds 50mL water Dilution filters and removes unreacted ligand, obtains claret clear filtrate.2g hexafluoros are added into filtrate and close ammonium phosphate, stirring obtains Peony precipitates, and after standing a night, filters, washs filter cake for several times with water and ether respectively, is dried in vacuo.Crude product is crossed 200 ~300 mesh neutral alumina columns are detached, with acetonitrile/toluene (5:1, v/v) it elutes, collects intermediate red zone eluent, use Preservative film sealing, which is placed on draught cupboard, makes solvent volatilize, and can obtain product about 0.2~0.3g, yield about 50%.
To gained complex carried out hydrogen spectrum (1H NMR) and electrospray ionization mass spectrum (ES-MS) characterization, it is as a result as follows:
1H-NMR(DMSO-d6, TMS, 400Hz):13.46 (1H, s), 10.07 (1H, d), 8.95 (2H, s), 8.79 (5H, S), 8.41 (4H, s), 8.18 (3H, s), 8.09 (2H, s), 7.79 (8H, m), 7.35 (2H, d), TOF-MS for a1:m/z 757.1(M-2PF6- H), 379.06 (M-2PF6/2)
Gained ruthenium (II) multi-pyridine ligand is used to be combined with tetra- serobilas of telomere G-, tetra- chains of telomere G- can be improved The stability of body regulates and controls expression of proto-oncogenes to inhibit telomerase activation.Tetra- serobilas of telomere G- are tetra- chains of telomere G- of people Body, tetra- serobilas of telomere G- include 22 bases.
The application of obtained ruthenium (II) complex is measured using method same as Example 1, as a result such as Fig. 4 and Shown in Fig. 5.
Spectroscopic data peak value display has apparent hypochromic effect and red shift, illustrates that complex and tetra- serobila DNA effects of G- are strong It is strong.But be between being inserted into two G- tetrads of tetra- serobilas of G- for the ligand of these four ruthenium complexes it is extremely difficult, This is because four serobilas be a rigidity and stablize structure, if to destroy its structural intergrity need to consume it is relatively high Energy.Therefore speculate complex a2It is to be acted on tetra- serobilas of G- by being stacked into tetra- serobila distal portions of G-, that is, be called External accumulation mode.And compared by spectrogram, either in potassium ion or sodium ion buffer solution, four kinds of complexs and telomere The effect power of tetra- serobilas of G- is all a2> a1
Ruthenium (II) complex a obtained by the present embodiment2Stabilizing power research for tetra- serobila DNA of telomere G-, specifically Steps are as follows:
Using FRET technologies, complex a2 is tested to fluorescent label DNA F22T (sequence (FAM- [(G3T2A) 3AG3]- TAMRA melting temperature T)mThe change of value.To reflect what Different Complex acted on tetra- serobila DNA Thermodynamically stables of G- Difference.FRET experiments carry out in PCR instrument, are buffered using the dipotassium hydrogen phosphate containing 100mM NaCl or disodium hydrogen phosphate molten Liquid (10mM, pH=7.0) is added annealing and forms the F22T (250nM) of tetra- serobilas of G- and the complex of a certain concentration ratio, It is common to be incubated 1 hour, carry out TmValue measures as shown in Figure 6.
The result shows that (0.5uM G4,100mM NaCl), the T of the F22T of tetra- serobilas of G- in the presence of having complexmValue compared with It is small;With complex a2Addition and concentration increase, the T of F22TmValue gradually increases, as complex a2Concentration increases to 7 μM When, tetra- serobila T of G-mValue improves 5 DEG C.Therefore, under potassium buffer solution complex to the stabilization of tetra- serobilas of G- be have it is dense Spend dependence, and complex a2Tetra- serobilas of stabilization G- effect be more than complex a1
Embodiment 3
Using preparation method similar to Example 1, following steps are specifically included:
1. synthetic ligands pbi (pbi=2- (1,10-Phenanthrolin-5-yl)-benzo [d] imidazole) is obtained Yellow powder:0.001mol o-phenylenediamines are added into single neck flask, 0.001mol 5- aldehyde radicals Phens and 0.002mol are sub- Niter cake, and 3mL DMF dissolvings are added, 12 hours are heated to reflux at 120 DEG C, obtain brown solution, and have a small amount of precipitation It generates.The water for adding 5 times of liquor capacities into reaction solution, has a large amount of yellow mercury oxides to generate, and filters, filter cake is washed with water for several times, very Sky is dry.Obtain yellow powder 0.255g, yield 86%.
2. 6mmol ruthenium trichlorides (RuCl is added in three-neck flask3·3H2O), mono- chloride hydrate lithiums of 6mmol, and 12mmol bipyridyls are dissolved in 10ml DMF, are heated to reflux under protection of argon gas in 130 DEG C 10 hours, are obtained solidliquid mixture, It is cooled to room temperature, adds 4 times of volumes in the acetone of solidliquid mixture, stirred with glass bar evenly dispersed to bottom solid, be placed in -25 15h is preserved at DEG C.Filter to obtain atropurpureus solid.The ethyl alcohol that all solids are added to 150mL is heated to reflux 0.5 hour, is cooled to Room temperature, suction filtration obtain atropurpureus crystallite, be washed till with ice water it is close colourless, it is dry, obtain cis- [Ru (bpy)2Cl2]·2H2O.With connection Pyridine calculates, yield about 65%.
3. accurately weighing 0.4mmol cis- [Ru (bpy)2Cl2]·2H2The product of O, 0.229g (0.6mmol) step 1, It is dissolved in 35mol ethylene glycol and 5mol H2The mixed solvent of O flows back 8 hours in 110 DEG C under protection of argon gas.Reaction starts molten Liquid is in atropurpureus, gradually becomes red as reaction tends to perfect solution color.It is cooled to room temperature after reaction, adds 50mL Water dilutes, and filters and removes unreacted ligand, obtains claret clear filtrate.2.33g hexafluoros are added into filtrate and close ammonium phosphate, stir It mixes, obtains peony precipitation, after standing a night, filter, wash filter cake for several times with water and ether respectively, be dried in vacuo.By crude product It crosses 200~300 mesh neutral alumina columns to be detached, with acetonitrile/toluene (3:1, v/v) it elutes, collects intermediate red zone elution Liquid, being placed on draught cupboard with preservative film sealing makes solvent volatilize, and can obtain product about 0.2~0.3g, yield about 50%.
Embodiment 4
Using preparation method similar to Example 1, following steps are specifically included:
1. synthetic ligands pbi (pbi=2- (1,10-Phenanthrolin-5-yl)-benzo [d] imidazole) is obtained Yellow powder:0.001mol o-phenylenediamines are added into single neck flask, 0.001mol 5- aldehyde radicals Phens and 0.002mol are sub- Niter cake, and 3mL DMF dissolvings are added, 5 hours are heated to reflux at 180 DEG C, obtain brown solution, and have a small amount of precipitation production It is raw.The water for adding 10 times of liquor capacities into reaction solution, has a large amount of yellow mercury oxides to generate, and filters, filter cake is washed with water for several times, vacuum It is dry.Obtain yellow powder 0.255g, yield 86%.
2. 6mmol ruthenium trichlorides (RuCl is added in three-neck flask3·3H2O), mono- chloride hydrate lithiums of 6mmol, and 12mmol bipyridyls are dissolved in 10ml DMF, are heated to reflux under protection of argon gas in 150 DEG C 5 hours, are obtained solidliquid mixture, It is cooled to room temperature, adds 6 times of volumes in the acetone of solidliquid mixture, stirred with glass bar evenly dispersed to bottom solid, be placed in -4 30h is preserved at DEG C.Filter to obtain atropurpureus solid.The ethyl alcohol that all solids are added to 150mL is heated to reflux 0.5 hour, is cooled to Room temperature, suction filtration obtain atropurpureus crystallite, be washed till with ice water it is close colourless, it is dry, obtain cis- [Ru (bpy)2Cl2]·2H2O.With connection Pyridine calculates, yield about 65%.
3. accurately weighing 0.4mmol cis- [Ru (bpy)2Cl2]·2H2The product of O, 0.229g (0.6mmol) step 1, It is dissolved in 35mol ethylene glycol and 5mol H2The mixed solvent of O flows back 5 hours in 130 DEG C under protection of argon gas.Reaction starts molten Liquid is in atropurpureus, gradually becomes red as reaction tends to perfect solution color.It is cooled to room temperature after reaction, adds 50mL Water dilutes, and filters and removes unreacted ligand, obtains claret clear filtrate.1.75g sodium perchlorates are added into filtrate, stir, Peony precipitation is obtained, after standing a night, filters, washs filter cake for several times with water and ether respectively, be dried in vacuo.By crude product mistake 200~300 mesh neutral alumina columns are detached, with acetonitrile/toluene (3:1, v/v) it elutes, collects intermediate red zone eluent, Being placed on draught cupboard with preservative film sealing makes solvent volatilize, and can obtain product about 0.2~0.3g, yield about 50%.

Claims (9)

1. a kind of ruthenium (II) multi-pyridine ligand, which is characterized in that the complex is with 2- (1,10- ferrosin -5- bases)-benzo miaow Azoles) it is main ligand, for complex with 2,2 '-bipyridyls or 1,10 '-phenanthrolines are co-ligand, the chemical formula of the complex For [Ru (bpy)2pbi]2+Or [Ru (phen)2pbi]2+, the structural formula of the complex is:
Wherein, 2 bpy, 2 '-bipyridyls, 1,10 '-phenanthrolines of phen, pbi are 2- (1,10- ferrosin -5- bases)-benzo Imidazoles).
2. a kind of preparation method of ruthenium as described in claim 1 (II) multi-pyridine ligand, which is characterized in that the preparation method packet Include following steps:
(1) synthesis of pbi:By 1:1:2 molar ratio weighs o-phenylenediamine, 5- aldehyde radicals Phen and sodium hydrogensulfite, is added DMF dissolves to obtain solution, is heated at reflux until starting to precipitate in solution, into solution, addition water obtains yellow mercury oxide, will Yellow mercury oxide filters, washing, it is dry after up to pbi, for use, wherein the volume that water is added into solution be liquor capacity 5~ 10 times, the temperature being heated at reflux described in step (1) is 120~180 DEG C, and the time being heated at reflux is 5~12h;
(2) 1 is pressed:1:2 molar ratio weighs RuCl3·3H2O, a chloride hydrate lithium and co-ligand, addition DMF dissolve to obtain molten Liquid is heated at reflux to obtain solidliquid mixture under the protection of protection gas, and acetone is added after being cooled to room temperature, and stirring keeps solid uniform Dispersion preserves 15~30h at -25~-4 DEG C, and suction filtration obtains purple black crystal, for use;
(3) purple black crystal obtained by pbi obtained by step (1) and step (2) is dissolved in the mixed solution of ethylene glycol and water, is being protected It in being heated at reflux under the protection of gas, then cools to room temperature, water dilution is added, suction filtration obtains filtrate, is added in gained filtrate Hexafluoro closes ammonium phosphate or sodium perchlorate, stirs to get precipitation, stands, filters, washing, vacuum drying obtains crude product;
(4) crude product obtained by step (3) is detached with silica gel chromatography, it is ruthenium (II) more pyrroles to obtain powdery product after dry Pyridine complex.
3. a kind of preparation method of ruthenium (II) multi-pyridine ligand according to claim 2, which is characterized in that step (2) The co-ligand includes bipyridyl or phenanthroline.
4. a kind of preparation method of ruthenium (II) multi-pyridine ligand according to claim 2, which is characterized in that step (2) The amount that acetone is added is 4~6 times of the solidliquid mixture, the temperature being heated at reflux described in step (2) is 130~ 150 DEG C, the time being heated at reflux is 5~10h.
5. a kind of preparation method of ruthenium (II) multi-pyridine ligand according to claim 2, which is characterized in that step (2), Step (3) the protection gas is selected from argon gas, nitrogen or helium.
6. a kind of preparation method of ruthenium (II) multi-pyridine ligand according to claim 2, which is characterized in that step (3) The ethylene glycol and H2The in the mixed solvent ethylene glycol and H of O2The molar ratio of O is 7:1, the hexafluoro of addition closes ammonium phosphate or perchloric acid The ratio between the quality of sodium and the mole of ethylene glycol are 1g:(15~20) mol, the washing are to be washed at least with water and ether successively 3 times, it is 110~130 DEG C that temperature is heated at reflux described in step (3), and it is 5~8h to be heated at reflux the time.
7. a kind of preparation method of ruthenium (II) multi-pyridine ligand according to claim 2, which is characterized in that step (4) The eluant, eluent with used in silica gel chromatography is acetonitrile and toluene, and the ratio of acetonitrile and toluene is acetonitrile:Toluene=3:1.
8. a kind of application of ruthenium as described in claim 1 (II) multi-pyridine ligand, which is characterized in that the complex is for making It is ready for use on the drug for the stability that tetra- serobilas of telomere G- are combined, improved with tetra- serobilas of telomere G-.
9. a kind of application of ruthenium (II) multi-pyridine ligand according to claim 8, which is characterized in that the telomere G- Four serobilas are tetra- serobilas of telomere G- of people, and tetra- serobilas of telomere G- include 22 bases.
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