CN115894398B - Fluothiazole amide-containing insecticidal acaricide - Google Patents

Fluothiazole amide-containing insecticidal acaricide Download PDF

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CN115894398B
CN115894398B CN202211535668.7A CN202211535668A CN115894398B CN 115894398 B CN115894398 B CN 115894398B CN 202211535668 A CN202211535668 A CN 202211535668A CN 115894398 B CN115894398 B CN 115894398B
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compound
general formula
mites
amide
fluorine
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CN115894398A (en
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王明慧
张如松
朱宝玉
许良忠
孙鉴昕
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Qingdao University of Science and Technology
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Qingdao University of Science and Technology
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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

Abstract

The invention provides a fluorine-containing thiazole amide compound, which has a structure shown in a general formula I:wherein R is:

Description

Fluothiazole amide-containing insecticidal acaricide
The invention belongs to the field of pesticides and acaricides in pesticides, and relates to a fluorine-containing thiazole amide type pesticide and acaricide for controlling pest mites in agriculture or forestry.
Background art the increasingly serious drug resistance of pest mites in agriculture causes that the control efficiency of the conventional pesticides is lower and lower, the duration is shortened, and a series of problems of larger and larger dosage, rising pesticide residues and the like are brought. Therefore, the development of novel insecticidal and acaricidal agents has necessity and urgency. Thiazole compounds have various biological activities, thiazole compounds are important insecticidal active compound types in the field of pesticide development, and common pesticides such as clothianidin, thiacloprid, thiamethoxam and the like are typical representatives of thiazole pesticides. In addition, fluorine atoms in pesticide molecules can obviously improve the fat solubility of the compound, reduce the hydrophilicity, further change the physicochemical property of the compound, and obviously change the electron distribution in the molecular structure, thereby influencing the structure-activity relationship of the compound and changing the biological activity of the compound. The compound is a series of fluorine-containing thiazole amide compounds which are formed by splicing fluorine-containing aromatic rings and thiazole rings, and the compound shown in the general formula I and the application thereof as agricultural insecticidal acaricide in the prior art are not disclosed. The invention aims to provide an insecticidal and acaricidal agent which has novel structure, simple and convenient synthesis method, safety and high efficiency and can be used for preventing and controlling agricultural or forestry pest mites.
The technical scheme of the invention is as follows:
a fluorine-containing thiazole amide compound has a structure shown in a general formula I:
wherein R is:
the compounds of the general formula I according to the invention can be prepared by the following processes:
wherein R is as defined above.
The specific preparation method is shown in the synthetic example of the invention. Table 1 shows the structure and appearance of the compounds of formula I.
TABLE 1 Structure and appearance of Compounds of general formula I
The invention has the advantages and positive effects that:
the compound (formula I) of the invention is used as agricultural insecticide and acaricide, and has the advantages of novel structure, simple synthesis, high efficacy and control of mites. The compound has good inhibiting and killing effects on plutella xylostella and tetranychus cinnabarinus, and can achieve the excellent effect of simultaneously controlling insect pest mites of agriculture and forestry. The compound has killing activity on plutella xylostella, wherein the killing rate of I-1, I-2 and I-3 reaches 100% and the killing rate of I-4 reaches 97% at the concentration of 100mg/L (see table 2). The compound has good inhibition and killing effect on tetranychus cinnabarinus, wherein the I-4 inhibition and killing effect is the best, and the killing rate reaches 100% at the concentration of 100mg/L (see table 3). The compound disclosed by the invention is a fluorine-containing thiazole amide compound, has the characteristics of high activity, low toxicity and good biocompatibility, is particularly suitable for preventing and controlling pesticide-resistant agricultural pest mites commonly existing at present, and has good development and application prospects as a novel variety of pesticides with the functions of killing insects and mites.
The compound can be used singly or in combination with other active substances to improve the comprehensive performance of the product when being used for preventing and controlling agricultural pests or mites.
The invention also comprises an insecticidal and acaricidal composition taking the compound shown in the general formula I as an active component, wherein the mass percentage of the active component in the composition is 1-99%. The insecticidal and acaricidal composition also comprises an agriculturally or forestry acceptable carrier.
It should be understood that various changes and modifications can be made within the scope of the present invention as defined in the appended claims.
Detailed Description
The following synthetic examples, green test results, are useful for further illustration of the invention and are not meant to limit the invention.
Synthesis example
Example 1 preparation of Compound I-1:
(1) Synthesis of intermediate 2- (2, 6-difluorophenyl) -4, 5-dihydro-1, 3-thiazole-4-carboxylic acid:
13.9g (0.1 mol) of 2, 6-difluorobenzonitrile, 18.15g (0.15 mol) of cysteine, 12.6g of sodium bicarbonate and 50g of ethanol are respectively added into a 250mL three-neck flask, the temperature is raised to reflux, the reaction is carried out for 4 hours, after the TLC monitoring reaction is finished, the solvent is removed, 100g of water is added, dilute hydrochloric acid is slowly added dropwise, the pH is regulated to about 5, and the white solid 23.5g is obtained through suction filtration and drying.
(2) Synthesis of I-1:
into a 500mL four-necked flask equipped with a mechanical stirring device, 24.3g (0.1 mol) of 2- (2, 6-difluorophenyl) -4, 5-dihydro-1, 3-thiazole-4-carboxylic acid, 14.8g (0.1 mol) of o-trifluoromethylaniline and 15.8g of pyridine were charged, and 150mL of acetonitrile was further added as a solvent to stir. Slowly dropwise adding 12.6g of methylsulfonyl chloride into a reaction system at room temperature, reacting for 4h at room temperature, monitoring by TLC (developing agent V (petroleum ether): V (ethyl acetate) =1:1), adding 100g of water after the reaction is complete, carrying out suction filtration, washing a filter cake with 20mL of deionized water for three times, and drying to obtain 37.9g of white solid, wherein the crude product yield is 98.2%.
I-2, I-3, I-4 were prepared in a similar manner.
Biological Activity test
Example 2 insecticidal Activity assay
(1) Plutella xylostella killing Activity assay
The specific implementation method is as follows: the test samples are mixed liquid medicine with the concentration of 500mg/L prepared by the compound and DMF, and then the mixed liquid medicine is diluted into liquid medicine with different concentration gradients by using 0.1% Tween-80. Cutting cabbage leaves into discs with uniform size and shape, soaking the discs into the prepared medicinal liquid with gradient concentration for 15-20s, taking out, repeating each concentration for three times, airing, and placing the leaves on filter paper wetted in a culture dish. And (3) placing 30 plutella xylostella larvae with the same growth state in a culture dish, controlling the temperature in the culture dish to 25 ℃, controlling the relative humidity to 60%, controlling the photoperiod to LD=16:8, and observing and recording the growth state of plutella xylostella. And when the culture time is 72 hours, counting the death number of the plutella xylostella larvae, wherein the result is the average value of three groups of experiments.
TABLE 2 results of Plutella xylostella killing Activity test of Compounds of general formula I
The test result shows that the compound has good killing activity on plutella xylostella, wherein the killing rate of I-1, I-2 and I-3 reaches 100% and the killing rate of I-4 reaches 97% at the concentration of 100 mg/L.
Example 3 acaricidal Activity assay
The mite killing activity test is carried out on the compound, the test method is a spray method, the test object is tetranychus cinnabarinus, and the specific operation method is as follows:
diluting the prepared 500mg/L medicinal liquid with 0.1% Tween-80 to obtain samples with different concentrations, adding into a Potter spray tower, and setting pressure to 1.47×10 5 And (5) MPa. 30 mites are inoculated on round broad bean leaves with the diameter of 5cm, and three groups are arranged for each concentration. Then placing the leaf blade with the mite in a Potter spray tower, spraying 1mL of liquid medicine, placing in a constant temperature incubator at 25 ℃ for culturing for 48 hours after spray treatment, observing and recording the death number of the tetranychus cinnabarinus, and calculating the death rate of the mites according to a formula.
TABLE 3 acaricidal Activity test results for Compounds of the general formula I
The test result shows that the compound has a good inhibition effect on tetranychus cinnabarinus, wherein the inhibition effect of I-4 is good and reaches 100% at the concentration of 100 mg/L.

Claims (3)

1. A fluorine-containing thiazole amide compound has a structure shown in a general formula I:
wherein R is: />
2. The use of a fluorine-containing thiazole amide compound according to claim 1, which is characterized in that the compound of the general formula I is used as an agricultural or forestry insecticidal acaricide and has a control effect on agricultural pest mites.
3. An insecticidal and acaricidal composition comprising a compound of the general formula i as defined in claim 1 as active ingredient and an agriculturally or forestry acceptable carrier.
CN202211535668.7A 2022-12-02 2022-12-02 Fluothiazole amide-containing insecticidal acaricide Active CN115894398B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1143957A (en) * 1994-01-24 1997-02-26 纳幕尔杜邦公司 Arthropodicidal 2-oxa and thia-zolines
AU2005220705A1 (en) * 2004-02-11 2005-09-22 The Ohio State University Research Foundation Analogs exhibiting inhibition of cell proliferation, methods of making, and uses thereof
CN114605298A (en) * 2022-04-11 2022-06-10 青岛科技大学 Fluorine-containing benzoyl thiourea insecticide and acaricide

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1143957A (en) * 1994-01-24 1997-02-26 纳幕尔杜邦公司 Arthropodicidal 2-oxa and thia-zolines
AU2005220705A1 (en) * 2004-02-11 2005-09-22 The Ohio State University Research Foundation Analogs exhibiting inhibition of cell proliferation, methods of making, and uses thereof
CN114605298A (en) * 2022-04-11 2022-06-10 青岛科技大学 Fluorine-containing benzoyl thiourea insecticide and acaricide

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