CN104529900A - Bactericidal activity of 1-substituted-N-substituted phenyl-5-amidogen-1H-pyrazole-4-formamide compound - Google Patents

Bactericidal activity of 1-substituted-N-substituted phenyl-5-amidogen-1H-pyrazole-4-formamide compound Download PDF

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Publication number
CN104529900A
CN104529900A CN201410852814.8A CN201410852814A CN104529900A CN 104529900 A CN104529900 A CN 104529900A CN 201410852814 A CN201410852814 A CN 201410852814A CN 104529900 A CN104529900 A CN 104529900A
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substituted
pyrazole
substituted phenyl
bactericidal activity
compound
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李华斌
杨华铮
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Nankai University
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Nankai University
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D231/00Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
    • C07D231/02Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings
    • C07D231/10Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
    • C07D231/14Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D231/38Nitrogen atoms
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D413/00Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms
    • C07D413/02Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings
    • C07D413/12Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings linked by a chain containing hetero atoms as chain links

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

The invention relates to bactericidal activity of a 1-substituted-N-substituted phenyl-5-amidogen-1H-pyrazole-4-formamide compound, wherein R1 represents alkyl, substituted phenyl and the like, X1 represents halogen, X2 represents an alkoxy group, an ene oxygen group, an alkyne oxygen group, a halogenated ene oxygen group and the like, and X1 and X2 can form a benzo 6-element heterocyclic ring with a benzene ring. The 1-substituted-N-substituted phenyl-5-amidogen-1H-pyrazole-4-formamide compound shows the bactericidal activity at the testing concentrate.

Description

Bactericidal activity of 1-substituted-N-substituted phenyl-5-amino-1H-pyrazole-4-formamide compound
[ technical field ]: the invention relates to bactericidal activity of 1-substituted-N-substituted phenyl-5-amino-1H-pyrazole-4-formamide compounds.
[ background Art ] A method of: the pyrazole carboxamide compound contains two high-activity structural groups of pyrazole and amide and has wide biological activity. Since the 40 s of the 20 th century, biologically active pyrazolecarboxamide derivatives including insecticides, acaricides, fungicides and herbicides have been reported in the field of agricultural chemical development.
Furametpyr (a) developed by sumitomo chemical company of japan in 1996 has a specific effect on most of germs of basidiomycetes, such as rice sheath blight disease, various rice sclerotinia diseases, and thread-whitening disease.
At the british plant protection conference of 2003, new amide fungicide penthiopyrad (B) is introduced by mitsui chemical corporation of japan, which has a broad fungicidal spectrum and shows excellent activity against rust and sclerotinia.
US 6054473 discloses a class of compounds C having fungicidal activity at 250g/hm2Is applied to barley white powder and 125g/hm2The control effect on barley sclerotium is 100 percent and 100g/hm2The effective rate of the pesticide on apple scab is 91 percent at 100g/hm2The inhibition rate of the powdery mildew on cucumber is 100%.
JP 2004189738 discloses that compound D has a killing rate of more than 90% against cabbage diamondback moth at a concentration of 500 mg/L.
WO 03010149 discloses Compound E at 250mg/L against M.hordei, 100g/hm2The control effect on apple powdery mildew can reach 100 percent.
WO 03070705 discloses a class of compounds F at 100g/hm2Can completely inhibit apple powdery mildew, cucumber powdery mildew, apple scab and tomato black spot, can be used for preventing and treating powdery mildew, rust disease, downy mildew and other diseases, and especially has good treatment and protection effects on barley net blotch and apple powdery mildew.
[ summary of the invention ]: the invention aims to provide a 1-substituted-N-substituted phenyl-5-amino-1H-pyrazole-4-formamide compound with bactericidal activity. The compounds are different from the reported compounds and have novel structures.
The compounds of the invention have the general formula (I):
in the formula,
R1alkyl, substituted phenyl, etc.;
X1is halogen;
X2alkoxy, alkenyloxy, alkynyloxy, haloalkenyloxy, etc.;
X1and X2Can also form a benzo 6-membered heterocyclic ring with a benzene ring, and the general formula is (II);
wherein,
r is alkyl, alkenyl or alkynyl;
said alkyl group being C1~C6Is straight-chain or branched alkyl, alkenyl isAlkenyl or alkynyl of (A) is C3~C6Alkynyl group of (1).
The compound is characterized in that:
R1preferably methyl, n-propyl, phenyl, m-trifluoromethylphenyl;
X1preferably chlorine;
X2preferably methoxycarbonyloxy, ethoxycarbonyloxy, isopropyloxy, allyloxy, propargyloxy, cyclopentyloxy, isopentyloxy;
X1and X2And can form a benzo 6-membered heterocyclic ring with a benzene ring, which has the general formula (II), wherein R is preferably n-propyl, allyl, propargyl or ethoxycarbonylmethyl.
The 1-substituted-N-substituted phenyl-5-amino-1H-pyrazole-4-formamide compound can be prepared by the following method: dissolving a compound (a) in a solvent, adding an inorganic base, heating to 40-80 ℃, hydrolyzing to obtain a compound (b), performing thionyl chloride chlorination on the compound (b) to obtain a compound (c), and reacting with the compound (d) to obtain a 1-substituted-N-substituted phenyl-5-amino-1H-pyrazole-4-formamide compound (I). The solvent is as follows: toluene, benzene, acetonitrile, tetrahydrofuran, dioxane, methanol, ethanol, water, or a mixed solvent of the above solvents in any proportion; the inorganic base is sodium hydroxide or potassium hydroxide.
The invention is further illustrated by the compounds listed in Table 1, but is not limited thereto.
The 1-substituted-N-substituted phenyl-5-amino-1H-pyrazole-4-formamide compound provided by the invention is different from the known compounds, has a completely novel structure and has better bactericidal activity.
The compound of the invention is applied to pesticides as a bactericide.
[ embodiments ] of the present invention:
the invention is further illustrated by the following examples in which the melting points are uncorrected.
Example 1: synthesis of 1-methyl-5-amino-1H-pyrazole-4-carboxylic acid (b1)
In a 500mL round bottom flask, 8.45g of ethyl 1-methyl-5-amino-1H-pyrazole-4-carboxylate (a1), 50mL of tetrahydrofuran, 50mL of anhydrous methanol and 50mL of 2.5mol/L aqueous sodium hydroxide solution were added, the mixture was heated to 60 ℃, the temperature was controlled for 4 hours, most of the solvent was removed under reduced pressure, the residue was acidified to pH 1 with 6mol/L hydrochloric acid, a milky precipitate appeared, filtered, washed with water and dichloromethane, respectively, and dried to give b1(5.55g) as a white solid, in 78.7% yield, melting point 67-68 ℃.
Example 2: synthesis of 1-methyl-5-amino-1H-pyrazole-4-carbonyl chloride (c1)
0.71g of 1-methyl-5-amino-1H-pyrazole-4-carboxylic acid (b1) is added into a 50mL round-bottom flask, 10mL of thionyl chloride is added dropwise under cooling of an ice salt bath, the mixture is naturally raised to room temperature after being added dropwise, the mixture is stirred for 3 hours, the thionyl chloride is pumped out under reduced pressure to obtain yellow solid c1(0.98g), the reaction is quantitatively finished, and the melting point is 128-130 ℃.
Example 3: synthesis of 1-methyl-5-amino-N- (2-fluoro-4-chloro-5-allyloxypropyl) -1H-pyrazole-4-carboxamide (I4)
Adding 0.40g of 2-fluoro-4-chloro-5-allyloxyaniline, 10mL of dichloromethane and 1mL of pyridine into a 50mL round-bottom flask, cooling a ice salt bath to below 0 ℃, adding 0.39g of 1-methyl-5-amino-1H-pyrazole-4-formyl chloride (c1), naturally raising the temperature to room temperature, detecting the reaction by TLC, removing the solvent under reduced pressure after the reaction is finished, washing a residual solution by 30mL of 1mol/L hydrochloric acid, filtering, washing a solid by a saturated sodium bicarbonate solution, filtering, and drying to obtain an off-white solid I4(0.52g), wherein the yield is 80.1 percent, and the melting point is 184-.
Similarly, other compounds of the invention can be synthesized in a similar manner, as shown in Table 1.
TABLE 1 characterization of physical Properties of Compound I
Example 4: fungicidal Activity test
A certain amount of the medicament is dissolved in a proper amount of DMF and then diluted to 50mg/L by using emulsified water. The results obtained by the ex vivo plate method are shown in Table 2. Pathogenic bacteria to be tested: cucumber fusarium wilt, peanut brown spot, apple ring rot, tomato early blight, wheat scab, potato late blight, sclerotinia sclerotiorum, cucumber gray mold, rice sheath blight and pepper phytophthora capsici.
A cell growth rate assay (mycelium growth rate test) was used. The specific process is as follows: under the aseptic condition, 1mL of liquid medicine is respectively sucked and injected into a culture dish, 9mL of PDA culture medium is added, a 50mg/L medicine-containing plate is prepared after shaking up, and a plate added with 1mL of sterilized water is used as a blank control. The plate was cut along the outer edge of the hyphae with a 4mm diameter punch and transferred to a drug-containing plate, and the treatment was repeated three times each time. The culture dish is placed in a constant temperature incubator at 24 +/-1 ℃ for culture. And (5) investigating the expansion diameter of each treated bacterium disc after 72h, calculating an average value, and comparing with a blank control to calculate the relative bacteriostasis rate. A: more than or equal to 50 percent; b: not less than 20 percent; c: less than 20%.
Table 2: inhibitory Rate (%) of fungicidal Activity of Compound I (concentration 50mg/L)

Claims (3)

1. A1-substituted-N-substituted phenyl-5-amino-1H-pyrazole-4-formamide compound with bactericidal activity is characterized by having a structure shown in the following general formula (I):
in the formula,
R1alkyl, substituted phenyl, etc.;
X1is halogen;
X2alkoxy, alkenyloxy, alkynyloxy, haloalkenyloxy, etc.;
X1and X2Can also form a benzo 6-membered heterocyclic ring with a benzene ring, and the general formula is (II);
wherein,
r is alkyl, alkenyl or alkynyl;
said alkyl group being C1~C6Is straight-chain or branched alkyl, alkenyl is C 3 ~C6Alkenyl or alkynyl of (A) is C3~C6Alkynyl group of (1).
2. The compound of claim 1, wherein:
R1preferably methyl, n-propyl, phenyl, m-trifluoromethylphenyl;
X1preferably chlorine;
X2preferably methoxycarbonyloxy, ethoxycarbonyloxy, isopropyloxy, allyloxy, propargyloxy, cyclopentyloxy, isopentyloxy;
X1and X2And can form a benzo 6-membered heterocyclic ring with a benzene ring, which has the general formula (II), wherein R is preferably n-propyl, allyl, propargyl or ethoxycarbonylmethyl.
3. Use of 1-substituted-N-substituted phenyl-5-amino-1H-pyrazole-4-carboxamides according to claim 1, characterized by bactericidal activity.
CN201410852814.8A 2014-12-31 2014-12-31 Bactericidal activity of 1-substituted-N-substituted phenyl-5-amidogen-1H-pyrazole-4-formamide compound Pending CN104529900A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108484614A (en) * 2018-05-23 2018-09-04 南开大学 Pyrazolo [3,4-d] pyrimidine -4 (5H) -one derivative and its preparation method and application

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996016954A1 (en) * 1994-12-02 1996-06-06 Agrevo Uk Limited Derivatives of anthranilic acid useful as fungicides
CN1533380A (en) * 2001-07-25 2004-09-29 �ݶ�ũ�����ѧ�ɷݹ�˾ N-pyrazolylcarboxanilides as fungicides
CN1646494A (en) * 2002-02-19 2005-07-27 拜尔农作物科学股份公司 Disubstituted pyrazolyl carboxanilides
CN101215289A (en) * 2008-01-11 2008-07-09 南开大学 3-substituted phenyl-pyrazolo[3,4-d][1,2,3]triazin-4-one compounds with PPO restraining activity and weeding activity
CN105017258A (en) * 2014-12-30 2015-11-04 南开大学 Prepartion and application of pyrazolo[3,4-d][1,2,3]triazine-4-one derivative

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996016954A1 (en) * 1994-12-02 1996-06-06 Agrevo Uk Limited Derivatives of anthranilic acid useful as fungicides
CN1533380A (en) * 2001-07-25 2004-09-29 �ݶ�ũ�����ѧ�ɷݹ�˾ N-pyrazolylcarboxanilides as fungicides
CN1646494A (en) * 2002-02-19 2005-07-27 拜尔农作物科学股份公司 Disubstituted pyrazolyl carboxanilides
CN101215289A (en) * 2008-01-11 2008-07-09 南开大学 3-substituted phenyl-pyrazolo[3,4-d][1,2,3]triazin-4-one compounds with PPO restraining activity and weeding activity
CN105017258A (en) * 2014-12-30 2015-11-04 南开大学 Prepartion and application of pyrazolo[3,4-d][1,2,3]triazine-4-one derivative

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
李华斌等: "3-(2-氟-4-氯-5-取代基苯基)-7-甲基-3H-吡唑并[3,4-d][1,2,3]三嗪-4(7H)-酮化合物的合成及其对原卟啉原氧化酶的抑制活性", 《有机化学》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108484614A (en) * 2018-05-23 2018-09-04 南开大学 Pyrazolo [3,4-d] pyrimidine -4 (5H) -one derivative and its preparation method and application

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