CN117837600A - Application of Iheyamine A compound in preventing and treating agricultural pathogenic bacteria - Google Patents

Application of Iheyamine A compound in preventing and treating agricultural pathogenic bacteria Download PDF

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Publication number
CN117837600A
CN117837600A CN202410002863.6A CN202410002863A CN117837600A CN 117837600 A CN117837600 A CN 117837600A CN 202410002863 A CN202410002863 A CN 202410002863A CN 117837600 A CN117837600 A CN 117837600A
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iheyamine
compound
agricultural
bacteria
preventing
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刘映前
张保琪
潘忠琪
牟国亮
张智军
杨柳
金亚瑞
安俊霞
罗雄飞
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Lanzhou University
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Lanzhou University
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/30Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change

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Abstract

The invention belongs to the field of natural pharmaceutical chemistry, and discloses a novel application of Iheyamine A compounds in preventing and treating agricultural diseases caused by agricultural pathogenic bacteria rice bacterial blight bacteria Xanthomonas oryzae pv.oryzae ACCC 11602, citrus canker Xanthomonas axonopodis pv.Citri, tomato bacterial wilt pseudoo-monas sollamacearum, xanthomonas campestris Xanthomonas campestris pv.campestris and Pseudomonas syringae clove pathogenic varieties Pseudomonas syringae pv.syringae. The Iheyamine A compound has the characteristics of novel structure and high efficiency as a novel agricultural bactericide, and has the value of further researching and developing the novel agricultural bactericide.

Description

Application of Iheyamine A compound in preventing and treating agricultural pathogenic bacteria
Technical Field
The invention belongs to the field of natural pharmaceutical chemistry, and discloses application of an Iheyamine A compound in preventing and treating agricultural bacteria.
Background
The alkaloid has wide application value in the agricultural field, and one of the effects is used as a bactericide for preventing and controlling agricultural pathogenic bacteria. Alkaloids generally have a broad spectrum of antimicrobial activity and can interfere with the physiological metabolic processes of bacteria through different mechanisms, thereby effecting inhibition of the growth of pathogenic bacteria. Iheyamine a was a natural alkaloid with a bisindole structure isolated from the ascidian animal polycitraella sp. At present, less research on the efficacy of the alkaloids, especially on the aspect of antibiosis, is not reported yet. The invention discovers that the Iheyamine A compound has excellent inhibition effect on agricultural pathogenic bacteria for the first time, and accordingly, the Iheyamine A compound has important scientific value in resisting infection of plant pathogenic bacteria by researching the alkaloid and developing a bactericide with a brand new action target.
The Iheyamine A and the derivatives thereof have stronger antibacterial activity on agricultural pathogenic bacteria rice bacterial blight bacteria Xanthomonas oryzae pv.oryzae ACCC 11602, citrus canker bacteria Xanthomonas axonopodis pv.Citrus, tomato bacterial wilt Pseudo-monas sollamacearum, xanthomonas campestris Xanthomonas campestris pv.campestris, pseudomonas syringae clove pathogenic varieties Pseudomonas syringae pv.syringae and the like, and are expected to be further developed into novel agricultural bactericides.
Disclosure of Invention
The invention provides a new application of Iheyamine A and derivatives thereof in resisting agricultural pathogenic bacteria, which is used for preventing and treating agricultural bacterial diseases. Iheyamine A and derivatives thereof are shown in chemical formula 1.
The application of the invention protects the application of the Iheyamine A and the derivatives thereof in preparing medicaments for preventing and treating or resisting plant pathogenic bacteria such as rice bacterial blight bacteria, citrus canker bacteria, tomato bacterial wilt bacteria, xanthomonas campestris, pseudomonas syringae, clove pathogenic varieties and the like.
Detailed Description
The foregoing invention is further described in the following detailed description of the invention in order that the same may be better understood. But this should not be construed as limiting the invention. The experimental methods described in the following examples are conventional, unless otherwise specified.
Example 1: synthesis of Iheyamine a and derivatives thereof
The compounds of the present invention were synthesized as indicated above.
Various substituted isatins (1.0 mmol), anhydrous potassium carbonate (1.2 mmol), potassium iodide (0.2 mmol) and 10mL DMF were added to a 100mL round bottom flask. The mixture was cooled in an ice water bath and 4-methoxybenzyl chloride (1.1 mmol) was added dropwise. The reaction mixture was heated to 110 ℃ using an oil bath and stirred for 3 hours. After completion of the reaction, the mixture was cooled to room temperature, poured into water and extracted with ethyl acetate. The organic layer was washed with water and the combined organic phases were washed with Na 2 SO 4 Dried and concentrated under reduced pressure to obtain a crude product, and intermediate 1 was purified by column chromatography.
To intermediate 1 (1.0 mmol), tryptamine (11.1 mmol) and EtOH (5 mL) acetic acid (5 mL) was slowly added at room temperature, then the mixture was heated to 40 ℃ using an oil bath and stirred for 15 hours. The mixture was concentrated under reduced pressure and diluted with ethyl acetate. The organic phase was saturated with NaHCO, respectively 3 The solution was washed with 1N HCl solution. The combined organic fractions were then washed with brine, and dried over Na 2 SO 4 Dried, filtered and concentrated under reduced pressure to give the crude product which is used directly in the next step.
The above product was dissolved in 10mL of acetonitrile, and 4-methylbenzenesulfonyl chloride (1.2 mmol) and K were added at room temperature 2 CO 3 (2.0 mmol) the mixture was heated to 80℃using an oil bath and stirredAnd (5) at night. The mixture was filtered, and the filtrate was concentrated to give a crude product, which was purified by column chromatography to give intermediate 2.
Intermediate 2 (0.34 mmol) was dissolved in 3mL dry toluene and Red-Al (0.37mmol,3.5N in toluene) was added slowly at 0deg.C using N 2 Protected and stirred at 0 ℃ for 5 hours. To the reaction mixture was added 5% aqueous naoh and ethyl acetate solution. The combined organic phases were washed with water, brine, and with Na 2 SO 4 The organic phase was dried, filtered and concentrated to afford intermediate 3.
To intermediate 3 above was added 10mL TFA, and the reaction mixture was then heated to 90 ℃ using an oil bath and stirred for 30 minutes. The reaction mixture was concentrated under reduced pressure to remove TFA. Purifying by column chromatography to obtain the target product.
Iheyamine a; a mauve solid; yield 50%; 1 H NMR(400MHz,DMSO-d 6 )δ9.26(d,J=6.4Hz,1H),9.19(s,1H),8.72(d,J=8.0Hz,1H),8.02(dd,J=8.1,2.9Hz,1H),7.98-7.91(m,2H),7.92(d,J=5.7Hz,1H),7.65(t,J=7.5Hz,1H),7.52(dt,J=9.0,2.4Hz,1H),3.96(d,J=2.0Hz,3H).ESI-MS calcd for C 19 H 13 N 3 O,[M+H + ],299.1059;found 300.1143.
compound 2; red solid; yield 52%; 1 H NMR(400MHz,DMSO-d 6 )δ9.28(d,J=6.2Hz,1H),9.20(d,J=6.0Hz,1H),8.71(d,J=8.0Hz,1H),8.25-8.17(m,1H),8.03-7.95(m,2H),7.91(t,J=7.6Hz,1H),7.74(dd,J=10.4,7.8Hz,1H),7.65(t,J=7.5Hz,1H).ESI-MS calcd for C 18 H 10 FN 3 ,[M+H + ],287.0859;found 288.0908.
compound 3; a mauve solid; yield 51%; 1 H NMR(400MHz,DMSO-d 6 )δ9.12(s,1H),9.01(d,J=7.6Hz,1H),8.65(d,J=7.7Hz,1H),8.43(t,J=7.6Hz,1H),7.95(t,J=7.5Hz,2H),7.88-7.80(m,1H),7.67-7.57(m,1H),7.57-7.48(m,1H).ESI-MS calcd for C 18 H 10 ClN 3 ,[M+H + ],303.0563;found 304.0614.
compound 4; a mauve solid; yield 50%; 1 H NMR(400MHz,DMSO-d 6 )δ9.04(d,J=6.6Hz,1H),8.89(d,J=6.7Hz,1H),8.59(d,J=7.9Hz,1H),8.44(d,J=7.8Hz,1H),7.94(d,J=8.1Hz,1H),7.88(d,J=8.0Hz,1H),7.78(dt,J=11.9,7.6Hz,2H),7.57-7.49(m,2H).ESI-MS calcd for C 18 H 11 N 3 ,[M+H + ],269.0953;found 270.1025.
example 2: iheyamine A and determination of activity of derivative thereof against agricultural pathogenic bacteria
The strain used in this experiment was a laboratory-80℃strain frozen with 30% glycerol. The frozen strains were taken out, streaked on NB solid medium (beef extract: 3g, peptone: 5g, yeast powder: 1g, sucrose: 10g, agar: 15g, distilled water: 1L, pH7.0; sterilization at 121 ℃ C. For 20 min), and cultured at a constant temperature of 28 ℃ C. Until single colonies were grown, respectively. The single colony on the solid culture medium is respectively picked up to the agricultural bacteria NB liquid culture medium (beef extract: 3g, peptone: 5g, yeast powder: 1g, sucrose: 10g, distilled water: 1L; sterilization at 121 ℃ C. For 20 min), and shake culture is carried out at a constant temperature of 28 ℃ C., 180rpm to the logarithmic phase. Diluting the strain in logarithmic growth phase with corresponding liquid culture medium to about 10 6 CFU/mL was ready for use. The compounds are respectively dissolved by DMSO, added into a liquid culture medium, and evenly mixed to prepare a liquid culture medium containing liquid with the concentration of 200 mug/mL. Taking 50 mu L of the drug-containing culture medium and the same volume of the drug-containing culture medium containing about 10 6 CFU/mL bacterial cultures were added to wells of 96-well plates at a final dosing concentration of 100. Mu.g/mL. A control was made of 100. Mu.L of the same concentration of bacterial liquid containing an equivalent amount of DMSO. Culturing 96-well plate in 28 deg.C incubator for 24-48 hr until bacteria liquid of control group grows out, and measuring OD value (OD) 600 ). And the OD values of 100. Mu.L of the liquid medium and the reagent at a concentration of 100. Mu.g/mL were additionally measured, and the OD values caused by the medium and the reagent themselves were corrected. The calculation formula for the corrected OD value and the inhibition rate is as follows:
corrected OD = sterile medium OD-sterile culture OD;
inhibition ratio = (corrected control culture broth OD value-corrected drug-containing culture broth OD value)/corrected control culture broth OD value x 100%
Iheyamine A and its derivative liquid medium in 96 hole plate through double dilution method to obtain 50 u L of serial concentration liquid medium, and the inhibition rate corresponding to the serial concentration is determined according to the same test method.
All experiments were set up in triplicate.
The activity test is carried out on Iheyamine A and derivatives thereof and a positive control agent thiabendazole (the purity is 20 percent, the thiabendazole is purchased from Zhejiang Longwan chemical engineering Co., ltd.) aiming at pathogenic bacterial blight of paddy rice, bacterial canker, tomato bacterial wilt, xanthomonas campestris and clove pseudomonas syringae of common pathogenic bacteria in agriculture, the initial activity measurement concentration of Iheyamine A and derivatives thereof is 100 mug/mL, the initial activity measurement concentration of the positive control agent is 100 mug/mL, and the partial activity test data are shown in table 1.
TABLE 1 Activity of Iheyamine A and its derivatives against agricultural pathogenic bacteria
Note that: "-" indicates that the inhibition ratio of the compound to the strain is less than 90%, and the MIC value is the lowest drug concentration inhibiting the growth of 90% of bacteria, for which the relevant data is not calculated.
As can be seen from the biological measurement results in Table 1, the Iheyamine A derivative provided by the invention has excellent inhibition effect on the measurement strains, and the Iheyamine A derivative containing substituent groups has better antibacterial activity, wherein Iheyamine A and compound 2 have MIC on rice white leaf blight ACCC 11602 90 50 μg/mL and 12.5 μg/mL, respectively.
In conclusion, the Iheyamine A and the derivatives thereof have higher inhibition effect on agricultural pathogenic bacteria and have further research and development values.

Claims (3)

1. The invention relates to application of an Iheyamine A compound in preventing and treating agricultural pathogenic bacteria. The molecular structure characteristics of the compound are as follows:
wherein R is 1 、R 2 Can be a substituent group such as hydrogen, fluorine, chlorine, methoxy and the like.
2. The compound of claim 1, wherein the compound has the chemical formula:
3. use according to claims 1 to 2 of such compounds for controlling bacterial leaf blight, citrus canker, tomato bacterial wilt, xanthomonas campestris and 5 agropathogenic bacteria of the pseudomonas syringae pathogenic variety.
CN202410002863.6A 2024-01-02 2024-01-02 Application of Iheyamine A compound in preventing and treating agricultural pathogenic bacteria Pending CN117837600A (en)

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CN202410002863.6A CN117837600A (en) 2024-01-02 2024-01-02 Application of Iheyamine A compound in preventing and treating agricultural pathogenic bacteria

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