CN108794462A - A kind of fluorine-containing cyanogen imines thiazolidine substitution oxadiazole class insecticidal bactericides - Google Patents

A kind of fluorine-containing cyanogen imines thiazolidine substitution oxadiazole class insecticidal bactericides Download PDF

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CN108794462A
CN108794462A CN201810755325.9A CN201810755325A CN108794462A CN 108794462 A CN108794462 A CN 108794462A CN 201810755325 A CN201810755325 A CN 201810755325A CN 108794462 A CN108794462 A CN 108794462A
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formula
thiazolidine
compound
fluorine
substitution
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CN108794462B (en
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许良忠
刘连才
胡娆
崔焕奇
王明慧
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Qingdao University of Science and Technology
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D417/00Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00
    • C07D417/02Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings
    • C07D417/06Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01NPRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N43/00Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/72Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms
    • A01N43/82Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms five-membered rings with three ring hetero atoms

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  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Dentistry (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Plant Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Agronomy & Crop Science (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)

Abstract

The present invention provides a kind of fluorine-containing cyanogen imines thiazolidine substitution oxadiazole class insecticidal bactericides, and structure is shown in formula I:

Description

A kind of fluorine-containing cyanogen imines thiazolidine substitution oxadiazole class insecticidal bactericides
The invention belongs to agricultural chemical insecticides and fungicide field for technical field, and in particular to a kind of fluorine-containing cyanogen imines thiazole Alkane replaces oxadiazole class insecticidal bactericides.
Background technology Monsanto in 2013 develops new and effective nematicide thiophene and phenyl substitution oxadiazole classes Object Tioxazafen (compound II) is closed, with the completely new mechanism of action, is played by interfering by nematode is ribosomal active Drug effect (Slomczynska U, South M S, Bunkers G J, et al.Tioxazafen:A New Broad- Spectrum Seed Treatment Nematicide [M], Discovery and Synthesis of Crop Protection Products, 2015.).Thiacloprid (Thiacloprid) (compound III) is by Bayer Bitterfeld GmbH agro-chemical companies With the novel chloro nicotinic insecticide of Japanese Bayer agro-chemical companies cooperative development.The present invention by active group splicing, Active group cyanogen imines thiazolidine is introduced on 1,2, the 4- positions oxadiazole 5-, difluoroethoxy phenyl is introduced into 1,2,4- oxadiazoles On the positions 3-, structure compound as shown in formula I is obtained, in the prior art, compound of formula I as representative of the present invention is used as agriculture and forestry Insecticidal bactericide is not disclosed.
The purpose of the present invention is to provide the low one kind of a kind of structure novel, efficient, safety, cost accounting for invention content Fluorine-containing cyanogen imines thiazolidine replaces oxadiazole class insecticidal bactericides.
Technical scheme is as follows:
A kind of fluorine-containing cyanogen imines thiazolidine substitution oxadiazole compounds, structure is as shown in I:
Compound of formula I can be by reacting preparation as follows:
Intermediate formula IV compound is warming up to 80 DEG C in DMF with Formula V compound by acid binding agent of potassium carbonate, reacts 4h systems Obtain compound of formula I.Specific preparation method is shown in that this specification synthesizes example.
Formula Compound I has beet armyworm and diamondback moth excellent insecticidal effect through insecticidal test, to rice line Blight bacterium, Colletotrichum capsici, fusarium graminearum and Chinese rose Pseudoperonospora cubensis have a good inhibiting effect, therefore the invention also includes Type I compound is used for the purposes of agriculture and forestry insect pest fungus damage prevention.
Advantages of the present invention and good effect:
The compounds of this invention is a kind of pyrazoles 1,2,4- oxadiazole compounds of substitution of brand new, is contained in its structure Oxadiazole, cyanogen imines thiazolidine, difluoro ethoxyphenyl structure, due in molecule simultaneously Han You oxadiazoles and cyanogen imines thiazolidine knot Structure so that the compound has desinsection and bactericidal effect simultaneously, plays the dual-purpose effect of a medicine, while drawing sub- into oxadiazole and cyanogen The heterocycles pharmacophoric group such as amine thiazolidine, increases action site, is beneficial to increase drug effect and broad spectrum activity, be influenced by pest resistance It is small, unexpected superelevation killing activity is shown to the pest of beet armyworm and diamondback moth resistance;Due to chemical combination of the present invention Contain-OCH in object2CHF2Group increases fat-soluble and permeability, significantly improves its uptake and translocation effect, to improve Its drug effect.The compounds of this invention synthesis material is easy to get, and synthesis technology is simple, is not necessarily to high temperature and pressure and special installation, is produced in production Raw " three wastes " are few, and yield is higher, and production cost is low.The compounds of this invention is heterocyclic nitrogen compound, is had to people, animal and beneficial Biological hypotoxicity, feature degradable, Environmental compatibility is good, have as initiative property insecticide new varieties industrialization foreground with The potentiality of commercialization.
Insecticidal and bactericidal composition the invention also includes compound of formula I as active component further includes agriculture in the composition Acceptable carrier in industry.
The compounds of this invention can be used alone in pest control fungus damage, can also be used with other active compounds, In favor of improving the integrated control performance of this product.
The composition of the compounds of this invention can be made reagent application, the compounds of this invention be scattered in as active component or It is dissolved in carrier or solvent, adds suitable surfactant that suspending agent, microemulsion, missible oil and aqueous emulsion etc. is made.
It should be appreciated that in the limited range of claim of the present invention, various changes and transformation can be carried out.
Specific implementation mode:
It synthesizes example below and raw test result can be used to further illustrate the present invention, but be not intended to limit this hair It is bright.
Synthesize example
The preparation of example 1, compound of formula I
(1) synthesis of 2- (2,2- difluoroethoxies) benzonitrile
Addition 0.1mol (11.9g) salicylonitrile into the three-necked flask of 250mL, 0.105mol (14.49g) potassium carbonate, 100mL DMF make solvent.Stirring, is warming up to 80 DEG C, with the dropping funel of 50mL by 0.12mol (19.2g) 2,2- difluoroethanols Methanesulfonate ester slowly instills in reaction bulb in batches, is stirred to react 4h.Reaction solution is poured into 500mL flasks, 1% hydrogen is added Sodium hydroxide solution 100mL washings, wash away the complete a small amount of salicylonitrile of unreacted, and 100mL ethyl acetate extraction product, liquid separation is added Retain organic phase, then use 3 × 100mL saturated common salt water washings again, liquid separation dries organic phase with anhydrous sodium sulfate, decompression Solvent is evaporated off, obtains pale yellowish oil liquid 2- (2,2- difluoroethoxy) benzonitrile 17.1g, yield 93.4% is (with salicylonitrile Meter).
(2) synthesis of intermediate 2- (2,2- difluoroethoxies)-N'- hydroxyl benzenecarboximidamides
The hydroxylamine hydrochloride of addition 0.19mol (13.21g) into the three-necked flask of 250mL, 0.2mol (20.2g) triethylamine, 100mL ethyl alcohol makees solvent, is heated to reflux half an hour, adds 0.1mol (18.3g) 2- (2,2- difluoroethoxy) benzonitrile, stirring Reflux four hours, TLC detects that 2- (2,2- difluoroethoxy) benzonitrile point disappears, ethyl alcohol is evaporated, and 200mL acetic acid second is added Ester extracts product in organic phase, filters removal triethylamine, and filtrate decompression rotates ethyl acetate, obtains oil product, uses Petroleum ether:Ethyl acetate 10:1 recrystallization, obtains beige crystals 2- (2,2- difluoroethoxy)-N'- hydroxyl benzenecarboximidamides 18.59g, yield 85.6%, 89~92 DEG C of fusing point.
(3) synthesis of N'- (2- chloroethenes acyloxy) -2- (2,2- difluoroethoxies) benzenecarboximidamide
0.02mol (4.32g) 2- (2,2- difluoroethoxies)-N'- hydroxy benzenes first is added into the three-necked flask of 250mL Amidine, 50mL ethyl acetate make solvent, and 0.022mol (2.2g) triethylamine does acid binding agent, reaction bulb is placed in ice-water bath, stirring, 0.02mol (2.24g) chloroacetic chlorides 50mL ethyl acetate is diluted, is slowly instilled with the dropping funel of 100mL, after dripping off React 2h.The point that TLC tracks to 2- ethyoxyl-N- hydroxy-benzamidines disappears, and filters, and collects filtrate revolving and does, obtains oily production Object is recrystallized to give N'- (2- chloroethenes acyloxy) -2- (2,2- difluoroethoxy) benzenecarboximidamide 5.5g, yield 94.1%, fusing point 81 ~84 DEG C.
(4) synthesis of 5- (chloromethyl) -3- (2- (2,2- difluoroethoxies) phenyl) -1,2,4- oxadiazoles
0.02mol (5.85g) N'- (2- chloroethenes acyloxy) -2- (2,2- difluoro second is added into the three-necked flask of 250mL Oxygroup) benzenecarboximidamide, 100mL toluene makees solvent, is heated to flowing back, and reacts 2h, and TLC tracks to raw material point disappearance, and vacuum rotary steam is dry Toluene solvant obtains pale tan oil 6.4g, and a small amount of recrystallizing methanol is added, and obtains white solid 5- (chloromethyl) -3- (2- (2,2- difluoroethoxy) phenyl) -1,2,4- oxadiazole 5.03g, yield 91.6%, 80~83 DEG C of fusing point.
(5) synthesis of compound of formula I
0.01mol (1.28g) 2- cyanoiminos -1,3-thiazoles alkane, 100mL DMF are added into the there-necked flask of 250mL Solvent is made, 0.011mol (1.52g) potassium carbonate does acid binding agent, is warming up to 80 DEG C, stirs half an hour, adds 0.01mol (2.73g) 5- (chloromethyl) -3- (2- (2,2- difluoroethoxy) phenyl) -1,2,4- oxadiazoles, insulation reaction 4h, TLC tracking It disappears, is cooled to room temperature to raw material point, 100mL water is added and continues to stir, there is solid precipitation, filters, crude product is obtained, with methanol weight Crystallization, obtains compound of formula I [5- ((2- cyanoiminos -1,3-thiazoles base) methyl) -3- (2- (2,2- difluoroethoxy) phenyl - 1,2,4- oxadiazole] 3.0g, yield 82.1%, 168~171 DEG C of fusing point.1H NMR (500MHz, DMSO-d6), δ (ppm):3.42 ~3.45 (t, 2H), 4.16~4.18 (t, 2H), 4.21~4.27 (m, 2H), 5.06 (s, 2H), 6.20~6.41 (m, 1H), 7.21~7.23 (t, 1H), 7.34~7.37 (d, 1H), 7.50~7.53 (m, 1H), 7.87~7.89 (d, 1H)
Biological activity determination
(1) medicament is prepared:
It by compound of formula I dmso solution, is then diluted, is configured to required dense with 1 ‰ Tween 80 aqueous solution 50 milliliters of the prepare liquid of degree, content of the dimethyl sulfoxide (DMSO) in total solution are no more than 10%.
(2) insecticidal activity assay
Using invade leaf method measure herein synthesize compound bioactivity.With diamondback moth (Plutella xylostella Linnaeus), beet armyworm (Beet armyworm) is test object, is divided into two groups, and blank control is arranged.Choose growing way Consistent cabbage leaves impregnate 10s in the medicament prepared, and drying liquid is taken out with tweezers, are put down successively in clean in sequence It is spread out on plate.Blade is transferred in the ranked good culture dish containing moisturizing filter paper after drying, is implanted into each culture dish The similar 2 age beet armyworm of upgrowth situation 30, and it is placed on raising, photoperiod L in constant incubator (25 ± 1 DEG C):D= 16:8, relative humidity 60% checks the death condition of beet armyworm after 48h, and records dead number.3 repeated experiments are made even Mean value, calculates corrected mortality, and calculation formula (1) is as follows:
In formula:P1--- the death rate, unit are percentage (%);K --- indicate dead borer population;N --- indicate that processing is total Borer population.
What it is to the implantation of the test of pesticide effectiveness of diamondback moth is both 2 instars, and experimental method is identical as above-mentioned steps.With compound III As a contrast, test result is listed in table 1.
Biologically active data of 1 compound of formula I of table to beet armyworm and diamondback moth
As seen from the data in Table 1, compound of formula I shows superelevation killing activity to beet armyworm and diamondback moth, better than control Medicine thiacloprid.
(3) bactericidal activity measures
The bactericidal effect of compound is measured using Plating.With Rhizoctonia solani Kuhn (Rhizoctonia solani), peppery Green pepper anthrax bacteria (Colletotrichum capsici), fusarium graminearum (Gibberella zeae), Chinese rose Pseudoperonospora cubensis Four kinds of mycelia are test object, are divided into four groups, and blank control is arranged.1mL liquids are drawn, sterilizing culture has been melted in injection in advance It in the sterile conical flask of base, fully shakes up, then equivalent is poured into the culture dish of 3 a diameter of 9cm, and a concentration of 50 μ g/L are made Drug containing tablet, be arranged 3 times repetition test, that no medicament is used in combination does same treatment as blank control.It will be above cultured Pathogen aseptically uses the sterilization punchers of diameter 5mm, cuts bacteria cake from colony edge, be inoculated in and contained with inoculator Medicine tablet center, mycelia is face-up, covers culture ware lid, culture dish is put in the constant incubator of (24 ± 1) DEG C and is trained It supports.Calliper colony diameter is used after 72h, is respectively measured once using crossing method diameter, is surveyed its average diameter.According to experiment As a result, calculating different agents to the mycelial growth inhibition rate for trying target bacterium by formula (1), (2).
D=D1-D2…………………………………………………(1)
In formula:D-bacterium colony increases diameter;D1--- colony diameter;D2--- bacteria cake diameter.
In formula:I --- mycelial growth inhibition rate;D0--- blank control bacterium colony increases diameter;Dt--- chemicals treatment bacterium colony Increase diameter.
As a result it is listed in table 2.
The biologically active data of 2 four kinds of germs of compound pair of table
As seen from the data in Table 2, compound of formula I has bactericidal effect.

Claims (4)

1. a kind of fluorine-containing cyanogen imines thiazolidine replaces oxadiazole class compounds, structure shown in formula I:
2. a kind of purposes of fluorine-containing cyanogen imines thiazolidine substitution oxadiazole class compounds according to claim 1, special Sign is that compound of formula I is used as agricultural or pesticide for forestry.
3. a kind of purposes of fluorine-containing cyanogen imines thiazolidine substitution oxadiazole class compounds according to claim 1, special Sign is that compound of formula I is used as agricultural or forestry fungicide.
4. a kind of insecticidal and bactericidal composition is in active component and agricultural or forestry containing compound of formula I described in claim 1 Acceptable carrier.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111635397A (en) * 2020-06-23 2020-09-08 南通大学 Preparation and application of 3- (4-trifluoromethylphenyl) -1,2, 4-oxadiazole derivative containing five-membered nitrogen heterocycle
CN111675704A (en) * 2020-06-23 2020-09-18 南通大学 2-substituent imidazole alkane compound containing oxadiazole heterocyclic structure and preparation method and application thereof

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CN107674070A (en) * 2017-09-19 2018-02-09 华南农业大学 A kind of cyano group imines thiazolidine furoyl amine compound and its preparation method and application

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111635397A (en) * 2020-06-23 2020-09-08 南通大学 Preparation and application of 3- (4-trifluoromethylphenyl) -1,2, 4-oxadiazole derivative containing five-membered nitrogen heterocycle
CN111675704A (en) * 2020-06-23 2020-09-18 南通大学 2-substituent imidazole alkane compound containing oxadiazole heterocyclic structure and preparation method and application thereof
CN111635397B (en) * 2020-06-23 2022-10-25 南通大学 Preparation and application of 3- (4-trifluoromethylphenyl) -1,2,4-oxadiazole derivative containing five-membered nitrogen heterocycle
CN111675704B (en) * 2020-06-23 2022-11-01 南通大学 2-substituent imidazole alkane compound containing oxadiazole heterocyclic structure and preparation method and application thereof

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