CN109020885B - Aminoquinoline compound and preparation method and application thereof - Google Patents
Aminoquinoline compound and preparation method and application thereof Download PDFInfo
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Abstract
The invention relates to the technical field of medicines, in particular to aminoquinoline compounds, a preparation method thereof and application thereof in antifungal aspects. The aminoquinoline compound provided by the invention generally has good antifungal activity and has the potential of being developed into non-azole antifungal drugs.
Description
Technical Field
The invention relates to the technical field of medicines, in particular to aminoquinoline compounds, a preparation method thereof and application thereof in antifungal aspects.
Background
The general development of broad-spectrum antibiotics, catheter intubation and endoscope technologies for long-term clinical use causes the destruction of the symbiotic relationship of normal flora of human bodies due to immunosuppressive agents and tumor chemoradiotherapy, the morbidity and mortality of fungal infections, particularly deep fungi are greatly increased, the current clinical treatment medicines cannot meet the treatment requirements, and the search for efficient, broad-spectrum and safe antifungal medicines is a very urgent problem.
The antifungal drugs which are most clinically researched and widely applied at present are lanosterol 14 alpha demethylase (CYP51) inhibitors. The lanosterol 14 alpha demethylase (CYP51) belongs to a member of cytochrome P450 superfamily proteins, is a key enzyme in the biosynthesis process of fungal cell membranes, and is also an important target enzyme for antifungal drug design. At present, the inhibitor for clinically treating deep fungal infection by CYP51 only has one structure type of azole drugs, but the azole drugs have two major problems of drug resistance and liver toxicity, so that the clinical application of the azole drugs is greatly limited. The problem of hepatotoxicity of the medicines is inevitable due to the mechanism characteristics and the action mechanism of the azole medicines, so that the development of a brand-new structural type of non-azole antifungal medicines is of great significance.
Disclosure of Invention
The invention aims to provide aminoquinoline compounds with novel structures; another object of the present invention is to provide a process for the preparation of such compounds; the invention also aims to provide the application of the compounds in antifungal aspects.
The specific technical scheme of the invention is as follows:
in a first aspect of the present invention, the present invention provides an aminoquinoline compound, which has a general structural formula I:
wherein R is1Is selected from C1-12Alkyl radical, C2-10Alkenyl radical, C2-10Alkynyl, C1-10Alkoxy radical, C1-10Carbonyl group, C1-10Alkoxycarbonyl or cycloalkyl.
The term "alkyl", unless otherwise indicated, means containing 1 to 12 carbon atoms. Alkyl groups include, but are not limited to, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, and tert-butyl. The "alkoxy" refers to an oxygen-containing alkyl group. The alkyl group referred to in the alkoxy group, alkylthio group, alkylcarbonyl group, alkoxycarbonyl group and the like is as defined above.
The "alkenyl" refers to a straight or branched chain hydrocarbon group of 2 to 10 carbon atoms containing one or more carbon-carbon double bonds; including but not limited to ethenyl, propenyl, and butenyl.
The term "cycloalkyl" refers to saturated or partially unsaturated cyclic hydrocarbons containing from 3 to 8 carbon atoms, unless otherwise specified. Cycloalkyl groups include, but are not limited to, cyclopropyl, cyclobutyl, cyclopentyl, cyclopentenyl, cyclohexyl, cyclohexenyl.
The invention also includes all corresponding pharmaceutically acceptable salts, hydrates or prodrugs of the above compounds. These salts may be formed from positively charged moieties of the compound with a negative charge of the opposite charge; or from a negatively charged moiety and a positive charge in the compound.
Preferably, said R is1Is selected from C1-10Alkyl radical, C2-10Alkenyl radical, C2-10Alkynyl, C2-10Carbonyl or C1-10An alkoxycarbonyl group.
Further, said R1Is selected from C3-10Alkyl radical, C3-10Alkenyl radical, C3-10Alkynyl, C3-10Carbonyl or C2-10Alkoxycarbonyl radical
Furthermore, the substitution site of the aminoquinoline compound is 2, 3 or 7.
Still further, the aminoquinolines are selected from the structures listed in table 1.
TABLE 1
The compounds listed in the invention, as the structural formula conflicts with nomenclature, are subject to chemical structural formula.
The compounds of the present invention can be prepared in the form of pharmaceutically acceptable salts according to conventional methods; including organic acid salts and inorganic acid salts thereof: inorganic acids include, but are not limited to, hydrochloric acid, sulfuric acid, phosphoric acid, diphosphoric acid, hydrobromic acid, nitric acid, and the like, and organic acids include, but are not limited to, acetic acid, maleic acid, fumaric acid, tartaric acid, succinic acid, lactic acid, p-toluenesulfonic acid, salicylic acid, oxalic acid, and the like.
As a second aspect of the present invention, there is provided a process for producing the above compound:
(1) dissolving aminoquinoline in acetonitrile, sequentially adding alkyl acyl chloride and N, N-diisopropylethylamine, uniformly mixing, and stirring at room temperature overnight;
(2) and after the reaction is finished, removing acetonitrile under reduced pressure, washing the residue with water, extracting with ethyl acetate, washing with brine, and performing column chromatography by using a petroleum ether/ethyl acetate mixed solvent as an eluent to obtain a target product.
Preferably, the aminoquinoline in the step (1) is 2-aminoquinoline, 3-aminoquinoline or 7-aminoquinoline.
Preferably, the alkyl acyl chloride in the step (1) is C3～11Alkyl acid chlorides.
Preferably, the molar ratio of aminoquinoline, alkyl acyl chloride and N, N-diisopropylethylamine in the step (1) is 1: 1.1-1.2: 1.1 to 1.2.
Preferably, the volume ratio of petroleum ether to ethyl acetate in the petroleum ether/ethyl acetate mixed solvent used as the eluent in the step (2) is 1-12: 1.
the invention also provides a pharmaceutical composition which comprises a pharmaceutically acceptable excipient or carrier, and the compound or the pharmaceutically acceptable inorganic or organic salt, hydrate, solvate or prodrug thereof.
The invention also provides application of the compound, or each crystal form, pharmaceutically acceptable inorganic or organic salt, hydrate, solvate or prodrug thereof, in preparation of antifungal medicines.
The aminoquinoline compound provided by the invention generally has good antifungal activity and has the potential of being developed into non-azole antifungal drugs.
Detailed Description
The present invention will be further described with reference to the following examples. It should be understood that the following examples are illustrative only and are not intended to limit the scope of the present invention.
EXAMPLE 1 preparation of Compound A1
3-aminoquinoline (144mg,1mmol) was weighed out, dissolved in 15ml acetonitrile, followed by the addition of N, N-diisopropylethylamine DIPEA (157mg,1.2mmol) and valeryl chloride (145mg,1.2mmol), mixed well and stirred at room temperature overnight.
After completion of the reaction, the solvent acetonitrile was removed under reduced pressure, an appropriate amount of water (10ml) was added, the aqueous layer (20 ml. times.3) was extracted with ethyl acetate, and the ethyl acetate layer was washed 2 times with a saline solution; after concentration of the ethyl acetate layer, the mixture was concentrated in petroleum ether: ethyl acetate ═ 1: 1 as eluent, and obtaining 116mg of product.
The hydrogen spectrum of a1 is as follows:
1H NMR(400MHz,CDCl3)δ8.83(s,1H),8.77(d,J＝2.4Hz,1H),8.02(t,J＝12.7Hz,1H),7.92-7.76(m,2H),7.63(t,J＝7.6Hz,1H),7.54(t,J＝7.5Hz,1H),2.43(dt,J＝30.5,7.5Hz,2H),1.86–1.66(m,2H),1.57-1.34(m,2H),1.01-0.89(m,3H).
EXAMPLE 2 preparation of Compound A2
Weighing 3-aminoquinoline (144mg,1mmol), adding 15ml acetonitrile to dissolve, adding N, N-diisopropylethylamine DIPEA (144mg,1.1mmol) and hexanoyl chloride (148mg,1.1mmol), mixing well, and stirring at room temperature overnight.
After completion of the reaction, the solvent acetonitrile was removed under reduced pressure, an appropriate amount of water (10ml) was added, the aqueous layer (20 ml. times.3) was extracted with ethyl acetate, and the ethyl acetate layer was washed 2 times with a saline solution; after concentration of the ethyl acetate layer, the mixture was concentrated in petroleum ether: ethyl acetate ═ 1: 1 as eluent, column chromatography was carried out to obtain 124mg of the product.
The hydrogen spectrum of a2 is as follows:
1H NMR(400MHz,CDCl3)δ8.79(t,J＝9.6Hz,2H),8.02(d,J＝7.6Hz,2H),7.78(d,J＝8.2Hz,1H),7.57(dt,J＝38.4,7.5Hz,1H),2.96(s,1H),2.89(s,1H),2.52-2.08(m,2H),1.78(dd,J＝14.1,7.2Hz,2H),1.33(dd,J＝23.0,20.1Hz,4H),0.90(t,J＝6.0Hz,3H).
EXAMPLE 3 preparation of Compound A3
3-aminoquinoline (144mg,1mmol) was weighed, dissolved in 15ml acetonitrile, added with DIPEA (144mg,1.1mmol) and heptanoyl chloride (178mg,1.2mmol), mixed well and stirred at room temperature overnight.
After completion of the reaction, the solvent acetonitrile was removed under reduced pressure, an appropriate amount of water (10ml) was added, the aqueous layer (20 ml. times.3) was extracted with ethyl acetate, and the ethyl acetate layer was washed 2 times with a saline solution; after concentration of the ethyl acetate layer, the mixture was concentrated in petroleum ether: ethyl acetate ═ 1: 1 as eluent, column chromatography was carried out to obtain 130mg of the product.
The hydrogen spectrum of a3 is as follows:
1H NMR(400MHz,CDCl3)δ8.91-8.60(m,3H),7.99(d,J＝8.4Hz,1H),7.73(d,J＝8.1Hz,1H),7.59(dd,J＝8.2,7.1Hz,1H),7.49(t,J＝7.5Hz,1H),2.39(dt,J＝24.0,7.5Hz,2H),1.79-1.54(m,2H),1.44-1.08(m,6H),0.94-0.68(m,3H).
EXAMPLE 4 preparation of Compound A4
3-aminoquinoline (144mg,1mmol) was weighed out, dissolved in 15ml acetonitrile, and then N, N-diisopropylethylamine DIPEA (157mg,1.2mmol) and octanoyl chloride (195mg,1.2mmol) were added, mixed well and stirred at room temperature overnight.
After completion of the reaction, the solvent acetonitrile was removed under reduced pressure, an appropriate amount of water (10ml) was added, the aqueous layer (20 ml. times.3) was extracted with ethyl acetate, and the ethyl acetate layer was washed 2 times with a saline solution; after concentration of the ethyl acetate layer, the mixture was concentrated in petroleum ether: ethyl acetate ═ 2: the mixed solvent of 1 is used as eluent to carry out column chromatography, and 146mg of the product is obtained.
The hydrogen spectrum of a4 is as follows:
1H NMR(400MHz,CDCl3)δ8.39(s,1H),8.20(s,1H),7.80-7.83(m,2H),7.43-7.46(m,1H),7.18(s,1H),2.34(t,J＝7.0Hz,2H),1.72-1.75(m,2H),1.28-1.31(m,8H),0.90(t,J＝6.7Hz,3H).
EXAMPLE 5 preparation of Compound A5
3-aminoquinoline (144mg,1mmol) was weighed out, dissolved in 15ml acetonitrile, followed by the addition of N, N-diisopropylethylamine DIPEA (157mg,1.2mmol) and nonanoyl chloride (212mg,1.2mmol), mixed well and stirred at room temperature overnight.
After completion of the reaction, the solvent acetonitrile was removed under reduced pressure, an appropriate amount of water (10ml) was added, the aqueous layer (20 ml. times.3) was extracted with ethyl acetate, and the ethyl acetate layer was washed 2 times with a saline solution; after concentration of the ethyl acetate layer, the mixture was concentrated in petroleum ether: ethyl acetate 4: the mixed solvent of 1 is used as eluent to carry out column chromatography, and 145mg of the product is obtained.
The hydrogen spectrum of a5 is as follows:
1H NMR(400MHz,CDCl3)δ8.42(s,1H),8.25(s,1H),7.83-7.85(m,2H),7.53-7.56(m,1H),7.12(s,1H),2.29(t,J＝7.1Hz,2H),1.73-1.77(m,2H),1.27-1.30(m,10H),0.90(t,J＝6.7Hz,3H).
EXAMPLE 6 preparation of Compound A6
3-aminoquinoline (144mg,1mmol) was weighed, dissolved in 15ml acetonitrile, added N, N-diisopropylethylamine DIPEA (157mg,1.2mmol) and decanoyl chloride (228mg,1.2mmol) in succession, mixed well and stirred at room temperature overnight.
After completion of the reaction, the solvent acetonitrile was removed under reduced pressure, an appropriate amount of water (10ml) was added, the aqueous layer (20 ml. times.3) was extracted with ethyl acetate, and the ethyl acetate layer was washed 2 times with a saline solution; after concentration of the ethyl acetate layer, the mixture was concentrated in petroleum ether: ethyl acetate ═ 8: the mixed solvent of 1 is used as eluent to carry out column chromatography, and 150mg of the product is obtained.
The hydrogen spectrum of a6 is as follows:
1H NMR(400MHz,CDCl3)δ8.55(s,1H),8.33(s,1H),7.80-7.85(m,2H),7.59-7.62(m,1H),7.18(s,1H),2.30(t,J＝7.1Hz,2H),1.71-1.75(m,2H),1.24-1.27(m,12H),0.90(t,J＝6.7Hz,3H).
example 7 preparation of Compound A7
3-aminoquinoline (144mg,1mmol) was weighed out, dissolved in 15ml acetonitrile, followed by the addition of N, N-diisopropylethylamine DIPEA (157mg,1.2mmol) and undecyl chloride (246mg,1.2mmol), mixed well and stirred at room temperature overnight.
After completion of the reaction, the solvent acetonitrile was removed under reduced pressure, an appropriate amount of water (10ml) was added, the aqueous layer (20 ml. times.3) was extracted with ethyl acetate, and the ethyl acetate layer was washed 2 times with a saline solution; after concentration of the ethyl acetate layer, the mixture was concentrated in petroleum ether: ethyl acetate 10: the mixed solvent of 1 is used as eluent to carry out column chromatography, and 156mg of the product is obtained.
The hydrogen spectrum of a7 is as follows:
1H NMR(400MHz,CDCl3)δ8.47(s,1H),8.36(s,1H),7.80-7.84(m,2H),7.62-7.66(m,1H),7.11(s,1H),2.35(t,J＝7.2Hz,2H),1.69-1.72(m,2H),1.21-1.24(m,12H),0.90(t,J＝6.7Hz,3H).
example 8 preparation of Compounds B1-B7
The preparation of compounds B1-B7 is essentially identical to that of compounds A1-A7, with the only difference that the starting material used is replaced by 2-aminoquinoline.
The hydrogen spectrum of B1 is as follows:
1H NMR(400MHz,CDCl3)δ9.55(s,1H),8.22(t,J＝7.5Hz,1H),8.20(dd,J＝7.5Hz,1.5Hz,1H),7.83-7.86(m,2H),7.50-7.53(m,1H),7.31(s,1H),2.34(t,J＝7.1Hz,2H),1.50-1.53(m,2H),1.27-1.31(m,2H),0.91(t,J＝6.7Hz,3H).
the hydrogen spectrum of B2 is as follows:
1H NMR(400MHz,CDCl3)δ9.20(s,1H),8.29(t,J＝7.5Hz,1H),8.22(d,J＝9.0Hz,1H),7.86-7.89(m,2H),7.48-7.51(m,1H),7.35(s,1H),2.31(t,J＝7.1Hz,2H),1.50-1.53(m,2H),1.28-1.32(m,4H),0.90(t,J＝6.7Hz,3H).
the hydrogen spectrum of B3 is as follows:
1H NMR(400MHz,CDCl3)δ9.70(s,1H),8.48(t,J＝7.5Hz,1H),8.20(d,J＝9.0Hz,1H),7.83-7.86(m,2H),7.70-7.73(m,1H),7.40(s,1H),2.34(m,2H),1.60-1.63(m,2H),1.35-1.39(m,6H),0.92(t,J＝6.8Hz,3H).
the hydrogen spectrum of B4 is as follows:
1H NMR(400MHz,CDCl3)δ10.10(s,1H),8.53(d,J＝9.0Hz,1H),8.20(d,J＝9.0Hz,1H),7.80(dd,J＝16.7,8.3Hz,2H),7.68(dd,J＝11.3,4.1Hz,1H),7.45(dd,J＝11.1,3.9Hz,1H),2.46(dt,J＝29.8,7.5Hz,2H),1.84-1.62(m,2H),1.49-1.10(m,8H),0.96-0.77(m,3H).
the hydrogen spectrum of B5 is as follows:
1H NMR(400MHz,CDCl3)δ9.48(s,1H),8.29(t,J＝7.9Hz,1H),8.22(d,J＝9.0Hz,1H),7.77-7.81(m,2H),7.68-7.71(m,1H),7.50(s,1H),2.31(m,2H),1.61-1.64(m,2H),1.33-1.36(m,10H),0.88(t,J＝6.7Hz,3H).
the hydrogen spectrum of B6 is as follows:
1H NMR(400MHz,CDCl3)δ10.43(s,1H),8.54(d,J＝9.1Hz,1H),8.20(d,J＝9.1Hz,1H),7.80(dd,J＝17.6,8.3Hz,2H),7.66(dd,J＝15.7,8.0Hz,1H),7.46(t,J＝7.5Hz,1H),2.46(dt,J＝34.2,7.5Hz,2H),1.83-1.59(m,2H),1.50-1.13(m,12H),0.95-0.79(m,3H).
the hydrogen spectrum of B7 is as follows:
1H NMR(400MHz,CDCl3)δ9.15(s,1H),8.29(t,J＝7.1Hz,1H),8.22(d,J＝9.0Hz,1H),7.94(m,1H),7.69-7.73(m,2H),7.42(s,1H),2.31(m,2H),1.50-1.53(m,2H),1.29-1.31(m,12H),0.88(t,J＝6.7Hz,3H).
example 9 preparation of Compounds C1-C7
The preparation of compounds C1-C7 was carried out in essentially the same manner as for compounds A1-A7, with the only difference that the starting material used was replaced by 7-aminoquinoline.
The hydrogen spectrum of C1 is as follows:
1H NMR(400MHz,CDCl3)δ8.75(m,2H),8.26(t,J＝7.5Hz,1H),7.90(dd,J＝7.5Hz,1.5Hz,1H),7.33-7.35(m,2H),7.29(s,1H),2.34(t,J＝7.1Hz,2H),1.50-1.53(m,2H),1.27-1.31(m,2H),0.91(t,J＝6.7Hz,3H).
the hydrogen spectrum of C2 is as follows:
1H NMR(400MHz,CDCl3)δ8.72(m,2H),8.26(t,J＝7.5Hz,1H),7.93(dd,J＝7.5Hz,1.5Hz,1H),7.31-7.34(m,2H),7.23(s,1H),2.39(t,J＝7.1Hz,2H),1.60-1.63(m,2H),1.29-1.33(m,4H),0.91(t,J＝6.7Hz,3H).
the hydrogen spectrum of C3 is as follows:
1H NMR(400MHz,CDCl3)δ8.75(m,2H),8.30(t,J＝7.5Hz,1H),7.94(dd,J＝7.5Hz,1.5Hz,1H),7.29-7.33(m,2H),7.21(s,1H),2.38(t,J＝7.0Hz,2H),1.70-1.724(m,2H),1.29-1.33(m,6H),0.92(t,J＝6.8Hz,3H).
the hydrogen spectrum of C4 is as follows:
1H NMR(400MHz,CDCl3)δ8.76(s,1H),8.38(s,1H),8.31(t,J＝7.5Hz,1H),7.92(dd,J＝7.5Hz,1.5Hz,1H),7.51-7.53(m,1H),7.35-7.39(m,2H),2.31(t,J＝7.0Hz,2H),1.72-1.75(m,2H),1.28-1.32(m,8H),0.90(t,J＝6.7Hz,3H).
the hydrogen spectrum of C5 is as follows:
1H NMR(400MHz,CDCl3)δ8.79(s,1H),8.41(s,1H),8.26(t,J＝7.5Hz,1H),7.90(dd,J＝7.5Hz,1.5Hz,1H),7.50-7.53(m,1H),7.33-7.35(m,2H),2.35(t,J＝7.1Hz,2H),1.70-1.73(m,2H),1.27-1.31(m,8H),0.85(t,J＝6.7Hz,3H).
the hydrogen spectrum of C6 is as follows:
1H NMR(400MHz,CDCl3)δ8.81(s,1H),8.33(s,1H),8.21(t,J＝7.5Hz,1H),7.95(dd,J＝7.5Hz,1.5Hz,1H),7.53-7.56(m,1H),7.31-7.34(m,2H),2.33(t,J＝7.1Hz,2H),1.73-1.75(m,2H),1.23-1.27(m,12H),0.89(t,J＝6.8Hz,3H).
the hydrogen spectrum of C7 is as follows:
1H NMR(400MHz,CDCl3)δ8.77(s,1H),8.32(s,1H),8.22(t,J＝7.5Hz,1H),7.97(dd,J＝7.5Hz,1.5Hz,1H),7.51-7.53(m,1H),7.33-7.36(m,2H),2.35(t,J＝7.2Hz,2H),1.69-1.72(m,2H),1.22-1.24(m,12H),0.92(t,J＝6.7Hz,3H).
the mass spectrum data of the compounds A1-A7, B1-B7 and C1-C7 are consistent with the expectation.
EXAMPLE 10 determination of the antifungal Activity of Compounds
(1) Experimental strains
In vitro antifungal activity was determined according to national clinical laboratory standards (NCCLS) [21,22] using PRMI1640 medium. 4 common human pathogenic true strains are adopted, fluconazole is taken as a reference drug, and an in-vitro bacteriostasis experiment method is adopted:
(a) candida (Candida albicans, Standard strain ATCC14053)
(b) Cryptococcus neoformans (Cryptococcus neoformans, Standard strain ATCC32609)
(c) Trichophyton rubrum (Trichophyton rubrum, Clin 031040)
(d) Aspergillus fumigatus (Aspergillus fumigatus, clinical strain 0109196)
(2) Culture solution
RPMI1640 culture solution RPMI1640(Gibco BRL)10g, NaHCO32.0g of morphine propanesulfonic acid (MOPS) (Sigma), 34.5g of morphine propanesulfonic acid (MOPS) (0.165M), 900ml of triple distilled water is added for dissolution, 1N NaOH is used for adjusting the pH to 7.0(25 degrees), the volume is fixed to 1000ml, and the filtrate is sterilized and stored at 4 ℃.
Sandcastle glucose agar medium (SDA): 10g of peptone, 40g of glucose and 8g of agar-agar 8g, adding 900ml of triple distilled water for dissolving, adding 2mg/ml of chloramphenicol aqueous solution 50m1, adjusting the pH to 7.0, fixing the volume to 1000ml, sterilizing under high pressure, and storing at 4 ℃.
YEPD culture solution: yeast extract l0g, peptone 20g, glucose 20g, adding triple distilled water 900ml for dissolving, adding 2mg/ml chloramphenicol aqueous solution 50m, diluting to 1000ml, autoclaving, and storing at 4 deg.C.
(3) Contrast drug
The clinically commonly used drug Fluconazole (FCZ) was selected and provided by the pharmaceutical chemistry research laboratory of the institute of medicine, university of naval medicine, liberty, china.
(4) Instrument for measuring the position of a moving object
A water-proof electric heating constant temperature incubator (jumping into a medical instrument factory from Shanghai); THZ-82A bench-top thermostatic oscillator (shanghai leap into the medical device factory); multiskan MK3 enzyme-labeled analyzer (Labsystems Dragon).
(5) Activity test method
a. Preparation of bacterial liquid
Before the experiment, a small amount of spherical bacteria such as cryptococcus neoformans, candida albicans and candida parapsilosis are picked from an SDA culture medium stored at 4 ℃ by using an inoculation loop, inoculated into 1ml of YEPD culture solution, subjected to shaking culture at 35 ℃, 250rpm and activated for 16 hours, so that the fungi are in the later period of exponential growth phase. Adding the bacterial solution into 1ml YEPD culture solution, activating again by the above method, counting with blood cell counting plate after 16h, adjusting bacterial solution concentration to 1 × 10 with RPMI1640 culture solution3～5×103One per ml.
Inoculating filamentous fungi to the SDA slant, wherein the subcutaneous tissue fungi and systemic fungi (Pepper's chromobacterium, Sporothrix schenckii, Aspergillus fumigatus) are cultured for one week at 35 deg.C; superficial fungi (Trichophyton rubrum, Microsporum gypseum, Microsporum lanosum) were cultured at 28 ℃ for two weeks. After the bacteria are activated twice according to the method, a proper amount of RPMI1640 culture solution is added to an SDA inclined plane, a bacterial colony is blown and beaten by a suction pipe, so that fungus brooms are dissociated in the RPMI1640 culture solution, and then the bacteria are filtered by four layers of sterile gauze. Counting the culture solution by a blood cell counting plate, adding RPMI1640 culture solution to adjust the concentration of the brood clamp to 1 × 103～5×103One per ml.
b. Preparation of medicinal solutions
The tested drugs are respectively prepared into 6.4g/L by DMSO-1The solution is stored at-20 ℃, and before the experiment, the liquid medicine is taken out and put in a 35 ℃ incubator to be melted for standby.
c. Preparation of drug sensitive plate
Taking a sterile 96-well plate, and adding RPMI1640 to each row of No. 1 wells as a blank control; adding 120 mul of freshly prepared bacterial liquid into each of No. 3-12 holes; 160. mu.l of the bacterial suspension and 1.6. mu.l of the test compound solution were added to well No. 2, respectively. Diluting 10-grade and 4-fold in No. 2-11 holes to ensure that the final concentration of the medicament in each hole is respectively 64, 16, 4, 1, 0.25, 0.0625, 0.0156, 0.0039, 0.00097 and 0.00024mg/L, and the DMSO content in each hole is lower than 1%; well 12 contained no drug and served as a positive control. Each drug sensitive plate was cultured at 35 ℃.
MIC value determination
After Candida, Cryptococcus neoformans and filamentous bacteria were cultured at 35 ℃ for 24h, 72h and one week, respectively, the OD value of each well was measured at 630nm using an enzyme-labeled analyzer. The concentration of the drug in the lowest concentration well in which the OD value was decreased by 80% or more, as compared with the positive control well, was MIC80 (the concentration of the drug at which fungal growth was 80% inhibited).
When the MIC80 value of the drug exceeds the measured concentration range, statistics are carried out according to the following method: MIC80 value was calculated as "> 64 mg/L" when it was higher than the highest concentration of 64 mg/L; MIC80 values were calculated as "< 0.00024 mg/L" at or below the lowest concentration without distinction.
The experiments are operated in parallel for 2 to 3 times, and the MIC80 value is accepted when the value can be accurately repeated or only differs by one concentration, and the higher concentration is taken as the MIC80 value; when the MIC80 values differ by more than two concentrations, re-experiments are required until the requirements are met.
TABLE 2
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (1)
1. The application of aminoquinoline compounds in preparing antifungal medicaments is disclosed, wherein the structural formula of the aminoquinoline compounds is as follows:
the antifungal medicine is selected from Candida, Cryptococcus neoformans, Trichophyton rubrum or Aspergillus fumigatus.
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| Heterocyclic Hydrophobic Dyes and their Interactions with Surfactant and Oil-in-Water Microemulsions;P.SAVARIONO等;《Colloids and Surfaces》;19901231;第48卷;第47-56页 * |
| P.SAVARIONO等.Heterocyclic Hydrophobic Dyes and their Interactions with Surfactant and Oil-in-Water Microemulsions.《Colloids and Surfaces》.1990,第48卷第47-56页. * |
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