CN110156812B - Spiro [ indazole-isoxazole ] derivative containing chromone structure, and preparation method and application thereof - Google Patents
Spiro [ indazole-isoxazole ] derivative containing chromone structure, and preparation method and application thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of medicines, and particularly relates to chromone-containing compoundsSpiro [ indazole-isoxazoles of structure]Derivatives, and a preparation method and application thereof. The invention relates to spiro [ indazole-isoxazole containing chromone structure]The preparation method of the derivative comprises the following steps: (1) synthesizing 6-bromo-4-oxo-4H-benzopyran-3-formaldehyde oxime; (2) 5-benzylidene-1-phenyl-6, 7-dihydro-1H-synthesis of indazol-4 (5H) -one; (3) 5-benzylidene-1-phenyl-6, 7-dihydro-1HThe (E) -indazole-4 (5H) -ketone and a compound 6-bromo-4-oxo-4H-benzopyran-3-formaldehyde oxime undergo 1, 3-dipolar cycloaddition reaction under the action of chloramine T to obtain spiro [ indazole-isoxazole with chromone structure]And (3) derivatives.
Description
Technical Field
The invention belongs to the technical field of medicines, and particularly relates to a spiro [ indazole-isoxazole ] derivative containing a chromone structure, and a preparation method and application thereof.
Background
5-benzylidene-1-phenyl-6, 7-dihydro-1H-indazol-4 (5H) -one, having the following chemical structure:
the 1, 3-dipolar cycloaddition reaction is the most important method for synthesizing five-membered heterocyclic compounds with good regioselectivity and body selectivity, and is also a more active reaction in heterocyclic pharmaceutical chemistry research. In recent years, chromones have received much attention due to a wide range of biological activities, such as anticancer, antibacterial, inhibition of platelet aggregation, and the like. The isoxazole skeleton is an important pharmacophore in the application of medicines, and has remarkable physiological and pharmacological activities. In addition, spiroisoxazoles synthesized by 1, 3-dipolar cycloaddition of nitrile oxides to exocyclic double bonds have attracted attention by pharmacologists because they exhibit some important physiological properties. Therefore, the heterocyclic compound has high synthetic value in terms of pharmacology and synthesis angle.
In order to better study the influence of different heterocycles on the pharmacological activity caused by the aggregation in the same molecule, a spiro [ indazole-isoxazole ] derivative containing a chromone structure is synthesized through 1, 3-dipolar cycloaddition reaction.
Disclosure of Invention
The invention aims to provide a spiro [ indazole-isoxazole ] derivative containing a chromone structure, and a preparation method and application thereof.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the chemical structural formula of a spiro [ indazole-isoxazole ] derivative containing a chromone structure is as follows:
wherein: ar ═ C6H5。
A preparation method of a spiro [ indazole-isoxazole ] derivative containing a chromone structure comprises the following steps:
(1) synthesis of 6-bromo-4-oxo-4H-benzopyran-3-carbaldehyde oxime: adding 50.0mL of 6-bromo-4-oxo-4H-benzopyran-3-formaldehyde into ethanol, completely dissolving 316.0mg of hydroxylamine hydrochloride and 464.0mg of sodium acetate in distilled water, dropwise adding the solution into the former solution by using a constant-pressure dropping funnel, heating, refluxing, tracking by TLC (thin layer chromatography), cooling to room temperature after the reaction is finished, carrying out suction filtration, washing with water, and recrystallizing a product by using 95% ethanol to obtain 6-bromo-4-oxo-4H-benzopyran-3-formaldehyde oxime;
(2) synthesis of 5-benzylidene-1-phenyl-6, 7-dihydro-1H-indazol-4 (5H) -one: dissolving 10mmol of 1-phenyl-6, 7-dihydro-1H-indazole-4 (5H) -ketone and 10mmol of benzaldehyde in 10mL of ethanol, adding 2mL of 40% NaOH aqueous solution, stirring at 80 ℃ for 3 hours, filtering and separating by using a Buchner funnel, washing a filter cake with water, recrystallizing and purifying by using ethanol, filtering and drying to obtain a product, namely 5-benzylidene-1-phenyl-6, 7-dihydro-1H-indazole-4 (5H) -ketone;
(3) adding 5-benzylidene-1-phenyl-6, 7-dihydro-1H-indazol-4 (5H) -one and 6-bromo-4-oxo-4H-benzopyran-3-formaldehyde oxime into 30mL of absolute ethyl alcohol for dissolving, adding chloramine T inorganic salt, refluxing for 12 hours, carrying out 1, 3-dipolar cycloaddition reaction, tracking by TLC, removing the solvent by reduced pressure rotary distillation after the reaction is completed, dissolving 3mL of ethyl acetate for standby application, and finally separating by silica gel column chromatography with a developing agent to obtain the spiro [ indazole-isoxazole ] derivative containing a chromone structure.
In the step (3), the ratio of the chloramine T inorganic salt to the 6-bromo-4-oxo-4H-benzopyran-3-carbaldehyde oxime to the 5-benzylidene-1-phenyl-6, 7-dihydro-1H-indazol-4 (5H) -one substance is 7:6: 5.
The developing solvent in the step (3) is ethyl acetate and petroleum ether, and the volume ratio of the ethyl acetate to the petroleum ether is V(Ethyl acetate):V(Petroleum ether)＝1:5。
An application of a spiro [ indazole-isoxazole ] derivative containing a chromone structure in an antitumor drug.
The invention provides a spiro [ indazole-isoxazole ] derivative containing a chromone structure and a preparation method thereof, wherein the preparation method comprises the step of introducing an isoxazole ring and a chromone structure into a 5-benzylidene-1-phenyl-6, 7-dihydro-1H-indazole-4 (5H) -ketone structure by using a 1, 3-dipolar ring addition method, so that the spiro [ indazole-isoxazole ] derivative containing the chromone structure is synthesized. The prepared spiro [ indazole-isoxazole ] derivative containing the chromone structure has stronger tumor cell inhibition and anti-inflammatory effects, and provides a basis for further application in the field of medicines.
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FIG. 1 is a scheme showing the preparation of 6-bromo-4-oxo-4H-benzopyran-3-carbaldehyde oxime (Compound 2) in accordance with the present invention;
FIG. 2 is a scheme showing the preparation of 5-benzylidene-1-phenyl-6, 7-dihydro-1H-indazol-4 (5H) -one (Compound 3) of the present invention;
fig. 3 is a flowchart of the preparation of a spiro [ indazole-isoxazole ] derivative (compound 4) containing a chromone structure in the present invention.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the drawings and examples, which should not be construed as limiting the present invention.
Chromones are receiving much attention due to a wide range of biological activities, such as anticancer, antibacterial, inhibition of platelet aggregation, and the like. In order to better study the influence of different heterocycles on the pharmacological activity caused by the aggregation in the same molecule, a spiro [ indazole-isoxazole ] derivative containing a chromone structure is synthesized through 1, 3-dipolar cycloaddition reaction.
The invention provides a spiro [ indazole-isoxazole ] derivative containing a chromone structure, which has the following chemical structural formula:
wherein: ar ═ C6H5。
This embodiment is a method for preparing a spiro [ indazole-isoxazole ] derivative having a chromone structure, comprising:
(1) synthesis of 6-bromo-4-oxo-4H-benzopyran-3-carbaldehyde oxime: adding 50.0mL of 6-bromo-4-oxo-4H-benzopyran-3-formaldehyde into ethanol, completely dissolving 316.0mg of hydroxylamine hydrochloride and 464.0mg of sodium acetate in distilled water, dropwise adding the solution into the former solution by using a constant-pressure dropping funnel, heating, refluxing, tracking by TLC (thin layer chromatography), cooling to room temperature after the reaction is finished, carrying out suction filtration, washing with water, and recrystallizing a product by using 95% ethanol to obtain 6-bromo-4-oxo-4H-benzopyran-3-formaldehyde oxime;
(2) synthesis of 5-benzylidene-1-phenyl-6, 7-dihydro-1H-indazol-4 (5H) -one: dissolving 10mmol of 1-phenyl-6, 7-dihydro-1H-indazole-4 (5H) -ketone and 10mmol of benzaldehyde in 10mL of ethanol, adding 2mL of 40% NaOH aqueous solution, stirring at 80 ℃ for 3 hours, filtering and separating by using a Buchner funnel, washing a filter cake with water, recrystallizing and purifying by using ethanol, filtering and drying to obtain a product, namely 5-benzylidene-1-phenyl-6, 7-dihydro-1H-indazole-4 (5H) -ketone;
(3) adding 1mmol of 5-benzylidene-1-phenyl-6, 7-dihydro-1H-indazol-4 (5H) -one and 1.2mmol of 6-bromo-4-oxo-4H-benzopyran-3-formaldehyde oxime into 30mL of anhydrous ethanol, dissolving, adding 1.4mmol of chloramine T inorganic salt, refluxing for 12 hours, carrying out 1, 3-dipolar cycloaddition reaction, tracking by TLC (thin layer chromatography), removing the solvent by reduced pressure rotary distillation after the reaction is completed, dissolving 3mL of ethyl acetate for standby application, and finally dissolving with V(Ethyl acetate):V(Petroleum ether)Separating by 1:5 silica gel column chromatography to obtain spiro [ indazole-isoxazole containing chromone structure]And (3) derivatives.
The experimental data are as follows: a spiro [ indazole-isoxazole ] derivative containing a chromone structure (compound 4) as a pale yellow powder, yield 52.7%, melting point: 173-:
1H NMR(CDCl3):8.20(s,1H,N＝C-H),7.49-7.21(m,13H,Ar-H),6.54(s,1H),6.47(s,1H,C＝C-H),3.42-3.45(m,1H),2.73(ddd,J＝8.5Hz,J＝5.5Hz,J＝3.0Hz,1H),2.50(ddd,J＝8.0Hz,J＝5.0Hz,J＝3.0Hz,1H),1.48(ddd,J＝14.5Hz,J＝11.0Hz,J＝5.5Hz,1H).
IR(KBr)v/cm-13105(ArH),1673(C＝O),1631,1580,1464(C＝N,C＝C),
m/e:565(100.0％)
Anal.calcd.forC30H20BrN3O4：C,63.62；H,3.56；N,7.42；found C,63.65；H,3.57；N,7.39。
in this example, MTT method is used to determine the in vitro inhibitory effect of the chromone structure-containing spiro [ indazole-isoxazole ] derivative on different tumor strains, and the determination result of the anti-tumor activity of the p-chlorophenyl substituted 6-bromochromone structure-containing spiro [ indazole-isoxazole ] derivative is as follows:
spiro [ indazole-isoxazole containing chromone structure]Dissolving the derivative in DMSO, diluting, and culturing tumor cells KB (oral cancer cell), SGC7901 (gastric cancer cell), HCT116 (colon cancer cell), Bel-7402 (human liver cancer cell)) HO8901 (ovarian cancer cells), K562 (leukemia cells) were seeded at 4000/200. mu.L/well in 96-well plates, 2. mu.L of compound was added to each well to a final concentration of 12.0. mu.M, 6.0. mu.M, 3.0. mu.M, 1.5. mu.M, together at 37 ℃ with 5% CO2The cells were incubated in an incubator for 72 hours, with DMSO (1%) as a blank control. After 72 hours, MTT was added to a final concentration of 0.25mg/mL and the mixture was left at 37 ℃ with 5% CO2After 4 hours in the cell incubator, the solvent was blotted, 100. mu.l DMSO was added to each well, absorbance (OD value) was measured at 570nm with an enzyme-linked immunosorbent assay, and the data obtained was used to calculate IC50The value is obtained. Selecting compounds with high inhibitory activity, and determining the influence of different action times of the compounds at different concentrations on the human tumor cell cycle and apoptosis.
The test compounds of different concentrations were coarse-screened in 96-well plates and IC was calculated from the resulting inhibition50The results are shown in Table 1 below (spiro [ indazole-isoxazole ] containing chromone structure]IC of derivatives on six tumor cell lines50Value).
TABLE 1
In Table 1, spiro [ indazole-isoxazole having chromone structure is shown]IC of derivative (Compound 4) against six tumor cell lines50The values show that the compound has stronger tumor cell inhibition effect on KB (oral cancer cells) and HCT116 (colon cancer cells), and provide a foundation for further application in the medical field.
In vitro anti-inflammatory Activity assay
Cell proliferation is a complex process, and the whole process is regulated by a network of signal paths, including extracellular signals and intracellular cascade amplification signals. Blocking the transmission of cell proliferation signals can inhibit the proliferation of RAW264.7 cells and reduce inflammation, thereby having anti-inflammatory effect.
Experimental procedure, test sample Compound 4. RAW264.7 cells were divided into 6 experimental groups, namely Control group, LPS group, and LPS + sample groups of different concentrations (5, 10, 20, 40 ug/mL). Culture of RAW264.7 cells by thinning RAW264.7 cellsCulturing cells in DMEM medium to logarithmic phase, digesting with digestive juice containing pancreatin 0.25% and EGTA-Na 0.01%, washing with DMEM medium, centrifuging, adjusting appropriate cell density, inoculating into 96-well plate, 200 μ L/well, standing at 37 deg.C and saturated humidity, and adding 5% CO2The incubator is used for 24 h. Adding 10 μ L of samples with different concentrations (concentration of 5, 10, 20, 40 μ g/mL, each concentration having 3 multiple wells at 37 deg.C and 5% CO)2Incubate the incubator for 24 hours.
This example uses the MTT method to test the effect of samples on LPS-stimulated RAW264.7 cell proliferation: after 24h of LPS (10. mu.g/mL), 20. mu. of LMTT working solution was added to each well, and the mixture was left at 37 ℃ under saturated humidity and 5% CO2The incubator is used for 24 h. After centrifugation and aspiration of the supernatant, 100. mu.L of dimethyl sulfoxide (DMSO) was added to each well, and after complete dissolution, the absorbance (A value) was measured at 492nm using a microplate reader to calculate the cell inhibitory rate of each group.
The cell inhibition rate was (1-experimental group a mean/control group a mean) × 100%, and the results of the effect of compound 4 on LPS-stimulated RAW264.7 cell proliferation were obtained as shown in table 2.
TABLE 2
The compound 4 can inhibit cell proliferation induced by LPS, has better in-vitro anti-inflammatory activity and is dose-dependent, and provides a foundation for further application in the medical field.
The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and those skilled in the art can make various corresponding changes and modifications according to the present invention without departing from the spirit and the essence of the present invention, but these corresponding changes and modifications should fall within the protection scope of the appended claims.
Claims (4)
1. The spiro [ indazole-isoxazole ] derivative containing the chromone structure is characterized by having the following chemical structural formula:
wherein: ar = -C6H5。
2. A process for the preparation of a spiro [ indazole-isoxazole ] derivative according to claim 1, containing a chromone structure, comprising the steps of:
(1) synthesis of 6-bromo-4-oxo-4H-benzopyran-3-carbaldehyde oxime: adding 50.0mL of 6-bromo-4-oxo-4H-benzopyran-3-formaldehyde into ethanol, completely dissolving 316.0mg of hydroxylamine hydrochloride and 464.0mg of sodium acetate in distilled water, dropwise adding the solution into the former solution by using a constant-pressure dropping funnel, heating, refluxing, tracking by TLC (thin layer chromatography), cooling to room temperature after the reaction is finished, carrying out suction filtration, washing with water, and recrystallizing a product by using 95% ethanol to obtain 6-bromo-4-oxo-4H-benzopyran-3-formaldehyde oxime;
(2) 5-benzylidene-1-phenyl-6, 7-dihydro-1HSynthesis of-indazol-4 (5H) -one: mixing 10mmol 1-phenyl-6, 7-dihydro-1HDissolving (E) -indazole-4 (5H) -ketone and 10mmol of benzaldehyde in 10mL of ethanol, adding 2mL of 40% NaOH aqueous solution by mass fraction, stirring at 80 ℃ for 3 hours, filtering and separating by using a Buchner funnel, washing a filter cake with water, recrystallizing and purifying by using ethanol, filtering and drying to obtain a product, namely 5-benzylidene-1-phenyl-6, 7-dihydro-1H-indazole-4 (5)H)-a ketone;
(3) in 30mL of anhydrous ethanol, 5-benzylidene-1-phenyl-6, 7-dihydro-1-is addedHDissolving (E) -indazole-4 (5H) -ketone and 6-bromo-4-oxo-4H-benzopyran-3-formaldehyde oxime, adding chloramine T inorganic salt, refluxing for 12 hours, performing 1, 3-dipolar cycloaddition reaction, tracking by TLC (thin layer chromatography), removing the solvent by reduced pressure rotary distillation after the reaction is completed, dissolving 3mL ethyl acetate for later use, and finally separating by silica gel column chromatography with a developing agent to obtain spiro [ indazole-isoxazole with a chromone structure]And (3) derivatives.
3. A process for the preparation of a spiro [ indazole-isoxazole ] derivative containing a chromone structure according to claim 2, wherein: in the step (3), the ratio of the chloramine T inorganic salt to the 6-bromo-4-oxo-4H-benzopyran-3-carbaldehyde oxime to the 5-benzylidene-1-phenyl-6, 7-dihydro-1H-indazol-4 (5H) -one substance is 7:6: 5.
4. Spiro [ indazole-isoxazoles with chromone structures according to claim 2]A process for the preparation of derivatives, characterized in that: the developing solvent in the step (3) is ethyl acetate and petroleum ether, and the volume ratio of the ethyl acetate to the petroleum ether is V(Ethyl acetate): V(Petroleum ether)=1:5。
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