CN115057843A - Preparation method of chlorantraniliprole insecticide - Google Patents

Preparation method of chlorantraniliprole insecticide Download PDF

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CN115057843A
CN115057843A CN202210676153.2A CN202210676153A CN115057843A CN 115057843 A CN115057843 A CN 115057843A CN 202210676153 A CN202210676153 A CN 202210676153A CN 115057843 A CN115057843 A CN 115057843A
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phosgene
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chlorantraniliprole
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CN115057843B (en
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罗先福
干兴利
王燕
黄炜
柳爱平
刘卫东
杜升华
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Hunan Research Institute of Chemical Industry
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    • C07D401/00Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
    • C07D401/02Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
    • C07D401/04Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings directly linked by a ring-member-to-ring-member bond
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Abstract

The invention discloses a preparation method of chlorantraniliprole insecticide, which takes substituted 1- (pyridine-2-yl) -1H-pyrazole-5-carboxylic acid as a raw material, adds an organic amine catalyst, and sequentially performs an acyl chlorination reaction with phosgene, an amidation reaction with substituted anthranilic acid, an acyl chlorination reaction with phosgene and an amidation reaction with alkylamine or alkylamine hydrochloride in an organic solvent to obtain a target product, wherein the yield reaches 91.5-93.7%. The method realizes that the same solvent is used for completing multi-step reaction in one pot, avoids the complex operations of material transfer, solvent replacement and the like, and has the advantages of low cost, easy operation, less pollution, suitability for large-scale industrial production requirements and the like.

Description

Preparation method of chlorantraniliprole insecticide
Technical Field
The invention relates to the technical field of organic compound preparation, in particular to a preparation method of chlorantraniliprole insecticide.
Background
The 1-pyridyl pyrazole amide compound has broad spectrum activity and is an important component of bisamide insecticides (such as chlorantraniliprole, cyantraniliprole, tetrachloro-cyantraniliprole, cyclopropane carboxamide and the like). The bisamide insecticide is an insecticide product which is most concerned by the market after the neonicotinoid insecticide, and is also the insecticide product which is the fastest growing in recent years. The outstanding bisamide insecticide represents chlorantraniliprole, not only is one of four milestones (phenothrin, imidacloprid, abamectin and chlorantraniliprole) in the field of insecticide research and development, but also is a leaderboard champion for insecticide sale since 2014, wherein the annual sale amount of the chlorantraniliprole 2014 reaches 14.7 billion dollars, and the annual sale amount of the chlorantraniliprole 2019 reaches 17.5 billion dollars. Cyantraniliprole, test code: DPX-HGW86, also known as Cyazypyr. The o-formamido benzamide pesticide which is discovered and developed by DuPont in 2007 and first marketed in Argentina in 2012. Cyantraniliprole is a sister product of chlorantraniliprole, and has wider application range and wider insecticidal range compared with the chlorantraniliprole. The sales of cyantraniliprole is continuously increasing, and the sales of cyantraniliprole reaches $ 1.20 billion in 2019. Tetrachloro worm amide, test code: SYP-9080, discovered and developed by Shenyang chemical research institute in 2008, temporarily registered in China in 2013, and formally registered anthranilamide insecticides in China in 2017. The tetrachlorantraniliprole is the most economic bisamide insecticide and can be used for crops such as cabbage, rice, corn and the like to prevent and control pests with chewing mouthparts such as cnaphalocrocis medinalis, corn borers and the like. The sales of the tetrachlorantraniliprole are continuously increased and reach $ 0.30 hundred million in 2019. Cyprodinil, test code: IKI-3106, a anthranilamide insecticide which was first marketed in Korea in 2017, was discovered and developed by Shiyuan corporation in 2005. The sales of cyprodinil continue to increase, reaching $ 0.22 million in 2019.
The synthesis methods of chlorantraniliprole insecticides are reported more, for example, the synthesis method of chlorantraniliprole is as follows: wangyanjun et al [ pesticide 2010, 49(3): 170-5-propanoic acid 173] use 3-bromo-1- (3-chloropyridine-2-pyridyl) -1H-pyrazole-5-carboxylic acid as raw material, add 5-chloro-3-methyl-2-aminobenzoic acid and acetonitrile, then cool down and drop 3-methylpyridine and acetonitrile solution of methylsulfonyl chloride in turn, add right amount of water after reaction, filter by suction to obtain yellow solid 6-chloro-2- (3-bromo-1- (3-chloropyridine-2-pyridyl) -1H-pyrazol-5-yl) -8-methyl-4H-3, 1-benzoxazine-4-one. The compound is dissolved in acetonitrile, and 25% methylamine water solution is dripped to obtain white solid chlorantraniliprole with the total yield of 76.1%. The method is a common synthesis method of chlorantraniliprole, but has the disadvantages of low total yield, complex operation, large amount of three wastes and high production cost. For example, the synthesis method of the tetrachloro insect amide: plum bin and the like (modern pesticides 2014 (3): 17-20) take acetonitrile as a solvent, and 1- (3, 5-dichloropyridin-2-yl) -3-bromo-1H-pyrazole-5-carboxylic acid and 3, 5-dichloro-2-aminobenzoic acid are reacted under the action of methylsulfonyl chloride and triethylamine to obtain 2- [ 3-bromo-1- (3, 5-dichloropyridin-2-yl) -1H-5-pyrazolyl ] -6, 8-dichloro-4H-benzo [ d ] [1,3] oxazin-4-one; the compound was then reacted with 30% aqueous methylamine in tetrahydrofuran to give the tetrachloro-worm-amide in 19.4% overall yield. The method has the advantages of low total yield, complex operation, large amount of three wastes and high production cost.
Related patents of the chlorantraniliprole insecticide will expire successively, and in order to break monopoly, reduce the use cost of the product and fully utilize the advantage of phosgene resources of enterprises, research on the synthesis process of the chlorantraniliprole insecticide is necessary, so that the product yield is improved, the production cost is reduced, the environmental pollution is reduced, and the enterprise competitiveness is enhanced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the preparation method of the chlorantraniliprole insecticide, which has the advantages of low cost, easy operation, less pollution and suitability for large-scale industrial production requirements.
In order to solve the technical problems, the invention adopts the following technical scheme:
a preparation method of chlorantraniliprole insecticide comprises the following steps:
the method comprises the steps of taking 1- (pyridine-2-yl) -1H-pyrazole-5-carboxylic acid substituted by a compound shown as a formula (VI) as a raw material, adding an organic amine catalyst, carrying out acyl chlorination reaction with phosgene in an organic solvent in sequence to obtain 1- (pyridine-2-yl) -1H-pyrazole-5-formyl chloride substituted by the compound shown as the formula (V), carrying out amidation reaction on the compound shown as the formula (V) and substituted anthranilic acid shown as the formula (IV) to obtain a compound shown as the formula (III), carrying out acyl chlorination reaction on the compound shown as the formula (III) and phosgene to obtain a compound shown as the formula (II), carrying out amidation reaction on the compound shown as the formula (II) and alkylamine or alkylamine hydrochloride to obtain a target product chlorantraniliprole insecticide shown as the formula (I), the reaction process is shown as the formula (1):
Figure BDA0003696641630000021
wherein: r 1 Is hydrogen or chlorine, R 2 Is methyl, chlorine or bromine, R 3 Is chlorine or cyano, R 4 Is hydrogen or chlorine, R is methyl, ethyl, propyl, isopropyl or 1-cyclopropylethyl.
In the above method for preparing chlorantraniliprole insecticide, preferably, the organic amine catalyst is one or more of N, N-dimethylformamide, N-dimethylacetamide, triethylamine, tri-N-butylamine, N-dimethylaniline, N-diethylaniline, pyridine, 2-methylpyridine, 3-methylpyridine, 4-methylpyridine, 2,4, 6-trimethylpyridine and 2,3, 5-trimethylpyridine, and the mass of the organic amine catalyst is 0.1-1% of that of the compound represented by formula (VI).
Preferably, the organic solvent is one of toluene, chlorobenzene, xylene, o-dichlorobenzene, acetonitrile, tetrahydrofuran, 1, 4-dioxane, methyl isobutyl ketone and ethylene glycol dimethyl ether, and the mass of the organic solvent is 3-10 times that of the compound shown in the formula (VI).
In the preparation method of the chlorantraniliprole insecticide, preferably, the specific preparation process of the compound shown as the formula (V) is as follows: mixing the compound shown in the formula (VI), an organic amine catalyst and an organic solvent, heating to reflux, introducing phosgene until the compound shown in the formula (VI) completely reacts, stopping introducing the phosgene, preserving heat, then cooling, introducing nitrogen to blow away the residual phosgene and hydrogen chloride in the reaction solution, and obtaining the organic solution containing the compound shown in the formula (V).
Preferably, in the specific preparation process of the compound shown in the formula (V), the molar ratio of the compound shown in the formula (VI) to phosgene is 1: 1.05-1.5, the temperature of the acyl chlorination reaction is 66-179 ℃, and the time for introducing phosgene is 1-8 h.
The preparation method of the chlorantraniliprole pesticide is preferably characterized in that the compound shown in the formula (III) is prepared by the following specific steps: mixing the substituted anthranilic acid shown in the formula (IV) with an organic solution containing the compound shown in the formula (V), heating and refluxing to perform amidation reaction, and obtaining an organic solution containing the compound shown in the formula (III) after the reaction is finished.
Preferably, in the specific preparation process of the compound shown in the formula (III), the molar ratio of the substituted anthranilic acid shown in the formula (IV) to the compound shown in the formula (V) is 1: 1, the temperature of the amidation reaction is 66-179 ℃, and the time of the amidation reaction is 0.5-4 h.
In the preparation method of the chlorantraniliprole insecticide, preferably, the specific preparation process of the compound shown in the formula (II) is as follows: keeping the organic solution containing the compound shown in the formula (III) to reflux, introducing phosgene until the compound shown in the formula (III) completely reacts, stopping introducing the phosgene, preserving heat, cooling, introducing nitrogen to blow away the phosgene and hydrogen chloride remained in the reaction solution, and obtaining the organic solution containing the compound shown in the formula (II).
Preferably, in the specific preparation process of the compound shown in the formula (II), the molar ratio of the compound shown in the formula (III) to phosgene is 1: 1.05-1.5, the temperature of the acyl chlorination reaction is 66-179 ℃, and the time for introducing phosgene is 1-8 h.
In the preparation method of the chlorantraniliprole insecticide, preferably, the specific preparation process of the target product shown in the formula (I) is as follows: mixing an organic solution containing the compound shown in the formula (II) with alkylamine or alkylamine hydrochloride, heating and refluxing for amidation reaction, removing 65-85% of solvent after the reaction is finished, cooling, adding water, continuously stirring, filtering and drying to obtain the target product shown in the formula (I).
Preferably, the alkylamine is methylamine, ethylamine, propylamine, isopropylamine or 1-cyclopropylethylamine, the alkylamine hydrochloride is methylamine hydrochloride, ethylamine hydrochloride, propylamine hydrochloride, isopropylamine hydrochloride or 1-cyclopropylethylamine hydrochloride, the molar ratio of the compound shown in the formula (II) to the alkylamine or alkylamine hydrochloride is 1: 1-1.5, the temperature of the amidation reaction is 66-179 ℃, the time of the amidation reaction is 0.5-4 h, and the mass of water is 0.2-0.5 times of the mass of the compound shown in the formula (VI).
In the invention, the phosgene is stopped and then the temperature is maintained, the temperature is usually maintained for 0.5h, but the temperature is not limited to the above, on one hand, the temperature can be maintained for the time of sampling and analyzing the reaction progress, and on the other hand, part of excessive phosgene and generated hydrogen chloride gas can be driven away.
Compared with the prior art, the invention has the advantages that:
the invention provides a brand new preparation route of the chlorantraniliprole insecticide, realizes that the same solvent is used for completing multi-step reaction by a one-pot method, obviously reduces the quantity of raw materials, effectively avoids complicated operations such as complex post-treatment, material transfer and the like, has good single-step reaction selectivity and simple operation, has less three wastes and is beneficial to industrial production. The preparation method of the invention has high product yield, and the total yield reaches 91.5-93.7%.
Detailed Description
The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention. The materials and equipment used in the following examples are commercially available.
Example 1:
the preparation method of the chlorantraniliprole insecticide comprises the following steps:
(1) synthesis of 3-bromo-1- (3-chloropyridine-2-pyridyl) -1H-pyrazole-5-formyl chloride
Figure BDA0003696641630000041
308.7g (98 percent, 1mol) of 3-bromo-1- (3-chloropyridine-2-pyridyl) -1H-pyrazole-5-carboxylic acid, 3.08g N, N-dimethylacetamide and 3087g of tetrahydrofuran are mixed and heated to 66 ℃ for reflux, 115.5g (90 percent, 1.05mol) of phosgene is introduced within 8H, the phosgene is stopped, the reaction is kept at a constant temperature for 0.5H, the temperature is reduced, nitrogen is introduced to blow away the phosgene and hydrogen chloride remained in the reaction solution, and the tetrahydrofuran solution of 3-bromo-1- (3-chloropyridine-2-pyridyl) -1H-pyrazole-5-formyl chloride is obtained, wherein the amount of 3-bromo-1- (3-chloropyridine-2-pyridyl) -1H-pyrazole-5-carbonyl chloride is 1 mol.
(2) Synthesis of 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H-pyrazole-5-carboxamide) -5-chloro-3-methylbenzoic acid
Figure BDA0003696641630000051
189.4g (98%, 1mol) of 2-amino-5-chloro-3-methylbenzoic acid was mixed with the above tetrahydrofuran solution of 3-bromo-1- (3-chloropyridin-2-pyridyl) -1H-pyrazole-5-carbonyl chloride, and then heated to 66 ℃ for reflux for 4 hours to give a tetrahydrofuran solution of 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H-pyrazole-5-carboxamide) -5-chloro-3-methylbenzoic acid, wherein the amount of 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H pyrazole-5-carboxamide) -5-chloro-3-methylbenzoic acid is 1 mol.
(3) Synthesis of 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H-pyrazole-5-carboxamide) -5-chloro-3-methylbenzoyl chloride
Figure BDA0003696641630000052
Keeping the tetrahydrofuran solution of the 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H pyrazole-5-formamide) -5-chloro-3-methylbenzoic acid at a reflux temperature of 66 ℃, introducing 115.5g (90 percent and 1.05mol) of phosgene within 8H, stopping introducing the phosgene, then carrying out heat preservation reaction for 0.5H, reducing the temperature, introducing nitrogen to blow off residual phosgene and hydrogen chloride in the reaction solution, and obtaining the tetrahydrofuran solution of 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H pyrazole-5-formamide) -5-chloro-3-methylbenzoyl chloride, wherein 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H pyrazole-5-formamide) -5-chloro-3-methylbenzoyl chloride The amount of 3-methylbenzoyl chloride is 1 mol.
(4) Synthesis of chlorantraniliprole
Figure BDA0003696641630000053
103.34g (98%, 1.5mol) methylamine hydrochloride is mixed with the tetrahydrofuran solution of the 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H pyrazole-5-carboxamide) -5-chloro-3-methylbenzoyl chloride, heated to 66 ℃ for refluxing for 4H, 2623.95g tetrahydrofuran is extracted and cooled, 154.35g water is added, and stirring, filtering and drying are carried out to obtain 452.03g white solid with the content of 97.8% and the yield of 91.5%. Melting point 209.1 deg.C-210.2 deg.C. LC-MS (M/z) 484.2(M + H) + ); 1 H NMR(CDCl 3 ,300MHz)δ:2.18(s,3H,Ph-CH 3 ),2.95(s,3H,NH-CH 3 ),6.17(br,1H,NH),6.84(s,1H,Pyrazole H),7.24(dd,J=8.1Hz,J=4.5Hz,1H,Py H),7.33(d,J=1.8Hz,1H,Ph H),7.37(d,J=1.8Hz,1H,Ph H),7.86(d,J=8.1Hz,1H,Py H),8.45(d,J=4.5Hz,1H,Py H),10.04(br,1H,NH)。
Example 2:
the preparation method of the chlorantraniliprole insecticide comprises the following steps:
(1) synthesis of 3-bromo-1- (3-chloropyridine-2-pyridyl) -1H-pyrazole-5-formyl chloride
Figure BDA0003696641630000061
308.7g (98 percent, 1mol) of 3-bromo-1- (3-chloropyridine-2-pyridyl) -1H-pyrazole-5-carboxylic acid, 1g of triethylamine and 1852.2g of xylene are mixed and heated to 140 ℃ for reflux, 165g (90 percent, 1.5mol) of phosgene is introduced within 2H, the reaction is kept at the temperature for 0.5H after the phosgene introduction is stopped, the temperature is reduced, nitrogen is introduced to blow off the phosgene and hydrogen chloride remained in the reaction liquid, and the xylene solution of 3-bromo-1- (3-chloropyridine-2-pyridyl) -1H-pyrazole-5-formyl chloride is obtained, wherein the amount of 3-bromo-1- (3-chloropyridine-2-pyridyl) -1H-pyrazole-5-carbonyl chloride is 1 mol.
(2) Synthesis of 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H-pyrazole-5-carboxamide) -5-cyano-3-methylbenzoic acid
Figure BDA0003696641630000062
179.78g (98%, 1mol) of 2-amino-5-cyano-3-methylbenzoic acid was mixed with the xylene solution of the above-mentioned 3-bromo-1- (3-chloropyridin-2-pyridyl) -1H-pyrazole-5-carbonyl chloride, and then heated to 140 ℃ for reflux for 1H to give a xylene solution of 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H-pyrazole-5-carboxamide) -5-cyano-3-methylbenzoic acid, wherein the amount of 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H pyrazole-5-carboxamide) -5-cyano-3-methylbenzoic acid is 1 mol.
(3) Synthesis of 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H-pyrazole-5-carboxamide) -5-cyano-3-methylbenzoyl chloride
Figure BDA0003696641630000063
Keeping the xylene solution of the 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H pyrazole-5-formamide) -5-cyano-3-methylbenzoic acid at 140 ℃ for reflux, introducing 115.5g (90 percent and 1.05mol) of phosgene within 2H, keeping the temperature for reaction for 0.5H after stopping introducing the phosgene, reducing the temperature, introducing nitrogen to blow off residual phosgene and hydrogen chloride in the reaction solution, and obtaining the xylene solution of 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H pyrazole-5-formamide) -5-cyano-3-methylbenzoyl chloride, wherein 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H pyrazole-5-formamide) -5-cyano-3-methylbenzoyl chloride The amount of the (E) -3-methylbenzoyl chloride was 1 mol.
(4) Synthesis of cyantraniliprole
Figure BDA0003696641630000071
103.34g (98%, 1.5mol) methylamine hydrochloride is mixed with the xylene solution of the 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H pyrazole-5-carboxamide) -5-cyano-3-methylbenzoyl chloride, heated to 140 ℃ for refluxing for 1H, 1500g xylene is extracted and cooled, 154.35g water is added, stirring is carried out, filtering is carried out, and a filter cake is dried to obtain 432.64g white solid with the content of 98.6% and the yield of 92.6%. Melting point 170.3 deg.C-171.6 deg.C. LC-MS (M/z):475(M + H) + ); 1 H NMR(CDCl 3 ,300MHz)δ:2.16(s,3H,Ph-CH 3 ),2.95(s,3H,NH-CH 3 ),6.27(br,1H,NH),7.14(s,1H,Pyrazole H),7.24(dd,J=8.1Hz,J=4.5Hz,1H,Py H),7.33(d,J=1.8Hz,1H,Ph H),7.37(d,J=1.8Hz,1H,Ph H),7.88(d,J=8.1Hz,1H,Py H),8.46(d,J=4.5Hz,1H,Py H),10.08(br,1H,NH)。
Example 3:
the preparation method of the chlorantraniliprole insecticide comprises the following steps:
(1) synthesis of 3-bromo-1- (3-chloropyridine-2-pyridyl) -1H-pyrazole-5-formyl chloride
Figure BDA0003696641630000072
308.7g (98 percent, 1mol) of 3-bromo-1- (3-chloropyridine-2-pyridyl) -1H-pyrazole-5-carboxylic acid, 1g of pyridine and 1852.2g of methyl isobutyl ketone are mixed and heated to 116 ℃ for reflux, 165g (90 percent, 1.5mol) of phosgene is introduced within 2H, the reaction is kept at the temperature for 0.5H after the phosgene introduction is stopped, the temperature is reduced, nitrogen is introduced to blow off the residual phosgene and hydrogen chloride in the reaction solution, so that the methyl isobutyl ketone solution of 3-bromo-1- (3-chloropyridine-2-pyridyl) -1H-pyrazole-5-formyl chloride is obtained, wherein the amount of 3-bromo-1- (3-chloropyridine-2-pyridyl) -1H-pyrazole-5-carbonyl chloride is 1 mol.
(2) Synthesis of 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H-pyrazole-5-carboxamide) -5-chloro-3-bromobenzoic acid
Figure BDA0003696641630000073
255.59g (98%, 1mol) of 2-amino-3-bromo-5-chlorobenzoic acid was mixed with a methyl isobutyl ketone solution of the above-mentioned 3-bromo-1- (3-chloropyridin-2-pyridyl) -1H-pyrazole-5-carbonyl chloride and heated to 116 ℃ for refluxing for 1 hour to give a methyl isobutyl ketone solution of 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H-pyrazole-5-carboxamide) -5-chloro-3-bromobenzoic acid, wherein the amount of 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H pyrazole-5-carboxamide) -5-chloro-3-bromobenzoic acid is 1 mol.
(3) Synthesis of 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H-pyrazole-5-carboxamide) -5-chloro-3-bromobenzoyl chloride
Figure BDA0003696641630000081
Keeping the methyl isobutyl ketone solution of the 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H pyrazole-5-formamide) -5-chloro-3-bromobenzoic acid to reflux at 116 ℃, introducing 115.5g (90 percent and 1.05mol) of phosgene within 2H, stopping introducing the phosgene, then carrying out heat preservation reaction for 0.5H, reducing the temperature, introducing nitrogen to blow off residual phosgene and hydrogen chloride in the reaction solution, and obtaining the methyl isobutyl ketone solution of the 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H pyrazole-5-formamide) -5-chloro-3-bromobenzoic acid chloride, wherein the 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H pyrazole-5-formamide) -5-bromobenzoic acid The amount of-chloro-3-bromobenzoyl chloride is 1 mol.
(4) Synthesis of cyclic bromoantraniliprole
Figure BDA0003696641630000082
86.89g (98%, 1mol) of 1-cyclopropylethylamine was mixed with the methyl isobutyl ketone solution of 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H-pyrazole-5-carboxamide) -5-chloro-3-bromobenzoyl chloride and heated to 116 ℃ for reflux for 1H, 1500g of methyl isobutyl ketone was taken and cooled, 61.74g of water was added, stirring was carried out,Filtration and drying to obtain 572g of white solid with the content of 98 percent and the yield of 93.1 percent. Melting point 235.6-236.8 deg.C. LC-MS (M/z):603.9(M + H) + ); 1 H NMR(CDCl 3 ,300MHz)δ:0.25~0.75(m,4H),1.16~1.35(m,4H),3.37~3.39(m,1H),7.12(s,1H,Pyrazole H),7.27(d,J=4.5Hz,1H,Py H),7.33(d,J=1.8Hz,1H,Ph H),7.37(d,J=1.8Hz,1H,Ph H),8.47(d,J=4.5Hz,1H,Py H),8.441(br,1H,NH),10.10(br,1H,NH)。
Example 4:
the preparation method of the chlorantraniliprole insecticide comprises the following steps:
(1) synthesis of 1- (3, 5-dichloropyridin-2-yl) -3-bromo-1H-pyrazole-5-carbonyl chloride
Figure BDA0003696641630000091
343.83g (98%, 1mol) of 1- (3, 5-dichloropyridin-2-yl) -3-bromo-1H-pyrazole-5-carboxylic acid, 1g N, N-dimethylaniline and 1852.2g of o-dichlorobenzene are mixed, heated to 179 ℃ for reflux, 165g (90%, 1.5mol) of phosgene is introduced within 1H, the reaction is kept at the temperature for 0.5H after the phosgene introduction is stopped, the temperature is reduced, nitrogen is introduced to blow off the phosgene and hydrogen chloride which remain in the reaction solution, and the o-dichlorobenzene solution of 1- (3, 5-dichloropyridin-2-yl) -3-bromo-1H-pyrazole-5-carbonyl chloride is obtained, wherein the amount of 1- (3, 5-dichloropyridin-2-yl) -3-bromo-1H-pyrazole-5-carbonyl chloride is 1 mol.
(2) Synthesis of 2- (3-bromo-1- (3, 5-dichloropyridin-2-yl) -1H-pyrazole-5-carboxamide) -3, 5-dichlorobenzoic acid
Figure BDA0003696641630000092
210.22g (98%, 1mol) of 3, 5-dichloro-2-aminobenzoic acid was mixed with the o-dichlorobenzene solution of the above-mentioned 1- (3, 5-dichloropyridin-2-yl) -3-bromo-1H-pyrazole-5-carbonyl chloride, and then heated to 179 ℃ for refluxing for 0.5H to obtain an o-dichlorobenzene solution of 2- (3-bromo-1- (3, 5-dichloropyridin-2-yl) -1H-pyrazole-5-carboxamide) -3, 5-dichlorobenzoic acid, wherein the amount of 2- (3-bromo-1- (3, 5-dichloropyridin-2-yl) -1H-pyrazole-5-carboxamide) -3, 5-dichlorobenzoic acid is 1 mol.
(3) Synthesis of 2- (3-bromo-1- (3, 5-dichloropyridin-2-yl) -1H-pyrazole-5-carboxamide) -3, 5-dichlorobenzoyl chloride
Figure BDA0003696641630000093
Keeping the o-dichlorobenzene solution of the 2- (3-bromo-1- (3, 5-dichloropyridin-2-yl) -1H pyrazole-5-formamide) -3, 5-dichlorobenzoic acid at 179 ℃ for reflux, introducing 165g (90 percent, 1.5mol) of phosgene within 1H, stopping introducing the phosgene, then carrying out heat preservation reaction for 0.5H, reducing the temperature, introducing nitrogen to blow off the residual phosgene and hydrogen chloride in the reaction solution, thus obtaining the o-dichlorobenzene solution of 2- (3-bromo-1- (3, 5-dichloropyridin-2-yl) -1H pyrazole-5-formamide) -3, 5-dichlorobenzoyl chloride, wherein 2- (3-bromo-1- (3, 5-dichloropyridin-2-yl) -1H pyrazole-5-formamide) -3, the amount of 5-dichlorobenzoyl chloride was 1 mol.
(4) Synthesis of tetrachloro worm amide
Figure BDA0003696641630000101
103.34g (98%, 1.5mol) of methylamine hydrochloride is mixed with the o-dichlorobenzene solution of the 2- (3-bromo-1- (3, 5-dichloropyridin-2-yl) -1H pyrazole-5-formamide) -3, 5-dichlorobenzoyl chloride, the mixture is heated to 179 ℃ for refluxing for 0.5H, 1500g of o-dichlorobenzene is taken out and cooled, 103.15g of water is added, stirring, filtering and drying are carried out, 512.62g of white solid with the content of 97.5% is obtained, and the yield of 92.9%. Melting point 176.6 deg.C-177.8 deg.C. LC-MS (M/z):539(M + H) + ); 1 H NMR(CDCl 3 ,300MHz)δ:2.89(s,3H,NH-CH 3 ),6.37(br,1H,NH),6.98(s,1H,Pyrazole H),7.24(d,J=4.5Hz,1H,Py H),7.33(d,J=1.8Hz,1H,Ph H),7.37(d,J=1.8Hz,1H,Ph H),8.41(d,J=4.5Hz,1H,Py H),10.01(br,1H,NH)。
Example 5:
the preparation method of the chlorantraniliprole insecticide comprises the following steps:
(1) synthesis of 3-bromo-1- (3-chloropyridine-2-pyridyl) -1H-pyrazole-5-formyl chloride
Figure BDA0003696641630000102
308.7g (98 percent, 1mol) of 3-bromo-1- (3-chloropyridine-2-pyridyl) -1H-pyrazole-5-carboxylic acid, 0.31g N, N-dimethylformamide and 926.1g of toluene are mixed and heated to 110 ℃ for reflux, 115.5g (90 percent, 1.05mol) of phosgene is introduced within 2H, the reaction is kept at the temperature for 0.5H after the phosgene introduction is stopped, the temperature is reduced, nitrogen is introduced to blow away the phosgene and hydrogen chloride remained in the reaction solution, and the toluene solution of 3-bromo-1- (3-chloropyridine-2-pyridyl) -1H-pyrazole-5-formyl chloride is obtained, wherein the amount of 3-bromo-1- (3-chloropyridine-2-pyridyl) -1H-pyrazole-5-carbonyl chloride is 1 mol.
(2) Synthesis of 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H-pyrazole-5-carboxamide) -3, 5-dichlorobenzoic acid
Figure BDA0003696641630000103
220.22g (98%, 1mol) of 3, 5-dichloro-2-aminobenzoic acid and the toluene solution of the 3-bromo-1- (3-chloropyridine-2-pyridyl) -1H-pyrazole-5-formyl chloride are mixed and heated to 110 ℃ for reaction for 1H to obtain the toluene solution of 2- (3-bromo-1- (3-chloropyridine-2-yl) -1H-pyrazole-5-formamide) -3, 5-dichlorobenzoic acid, wherein the amount of 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H-pyrazole-5-carboxamide) -3, 5-dichlorobenzoic acid is 1 mol.
(3) Synthesis of 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H-pyrazole-5-carboxamide) -3, 5-dichlorobenzoyl chloride
Figure BDA0003696641630000111
Keeping the toluene solution of the 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H-pyrazole-5-formamide) -3, 5-dichlorobenzoic acid at a reflux temperature of 110 ℃, introducing 115.5g (90 percent and 1.05mol) of phosgene within 2H, stopping introducing the phosgene, then carrying out heat preservation reaction for 0.5H, reducing the temperature, introducing nitrogen to blow off the residual phosgene and hydrogen chloride in the reaction solution, obtaining the toluene solution of 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H-pyrazole-5-formamide) -3, 5-dichlorobenzoyl chloride, wherein 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H-pyrazole-5-formamide) -3, the amount of 5-dichlorobenzoyl chloride was 1 mol.
(4) Synthesis of 3-bromo-1- (3-chloropyridin-2-yl) -N- (2, 4-dichloro-6- (ethylcarbamoyl) phenyl) -1H-pyrazole-5-carboxamide
Figure BDA0003696641630000112
83.2g (98%, 1mol) of ethylamine hydrochloride and the toluene solution of the 2- (3-bromo-1- (3-chloropyridin-2-yl) -1H-pyrazole-5-carboxamide) -3, 5-dichlorobenzoyl chloride are mixed, heated to 110 ℃ and refluxed for 1H, 602g of toluene is extracted and cooled, 62g of water is added, and 494.37g of white solid with the content of 98.1% and the yield of 93.7% is obtained after stirring, filtering and drying. Melting point 227.1 ℃ to 228.2 ℃. LC-MS (M/z) 518.6(M + H) + ); 1 H NMR(CDCl 3 ,300MHz)δ:1.23(t,J=7.2Hz,3H,CH 3 ),3.28~3.34(m,2H,CH 2 ),6.17(br,1H,NH),6.84(s,1H,Pyrazole H),7.34(dd,J=8.1Hz,J=4.5Hz,1H,Py H),7.36(d,J=1.8Hz,1H,Ph H),7.54(d,J=1.8Hz,1H,Ph H),7.87(d,J=8.1Hz,1H,Py H),8.42(d,J=4.5Hz,1H,Py H),10.06(br,1H,NH)。
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or equivalent modifications, without departing from the spirit and scope of the invention, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention.

Claims (10)

1. A preparation method of chlorantraniliprole insecticide is characterized by comprising the following steps:
the method comprises the steps of taking 1- (pyridine-2-yl) -1H-pyrazole-5-carboxylic acid substituted by a compound shown as a formula (VI) as a raw material, adding an organic amine catalyst, carrying out acyl chlorination reaction with phosgene in an organic solvent in sequence to obtain 1- (pyridine-2-yl) -1H-pyrazole-5-formyl chloride substituted by the compound shown as the formula (V), carrying out amidation reaction on the compound shown as the formula (V) and substituted anthranilic acid shown as the formula (IV) to obtain a compound shown as the formula (III), carrying out acyl chlorination reaction on the compound shown as the formula (III) and phosgene to obtain a compound shown as the formula (II), carrying out amidation reaction on the compound shown as the formula (II) and alkylamine or alkylamine hydrochloride to obtain a target product chlorantraniliprole insecticide shown as the formula (I), the reaction process is shown as formula (1):
Figure FDA0003696641620000011
wherein: r is 1 Is hydrogen or chlorine, R 2 Is methyl, chlorine or bromine, R 3 Is chlorine or cyano, R 4 Is hydrogen or chlorine, R is methyl, ethyl, propyl, isopropyl or 1-cyclopropylethyl.
2. The preparation method of the chlorantraniliprole insecticide according to claim 1, wherein the organic amine catalyst is one or more of N, N-dimethylformamide, N-dimethylacetamide, triethylamine, tri-N-butylamine, N-dimethylaniline, N-diethylaniline, pyridine, 2-methylpyridine, 3-methylpyridine, 4-methylpyridine, 2,4, 6-trimethylpyridine and 2,3, 5-trimethylpyridine, and the mass of the organic amine catalyst is 0.1-1% of that of the compound shown in formula (VI).
3. The preparation method of the chlorantraniliprole insecticide according to claim 1, wherein the organic solvent is one of toluene, chlorobenzene, xylene, o-dichlorobenzene, acetonitrile, tetrahydrofuran, 1, 4-dioxane, methyl isobutyl ketone and ethylene glycol dimethyl ether, and the mass of the organic solvent is 3-10 times that of the compound shown in the formula (VI).
4. The preparation method of the chlorantraniliprole insecticide according to any one of claims 1 to 3, wherein the compound represented by the formula (V) is prepared by the following specific steps: mixing a compound shown in a formula (VI), an organic amine catalyst and an organic solvent, heating until reflux, introducing phosgene until the compound shown in the formula (VI) completely reacts, stopping introducing the phosgene, preserving heat, cooling, introducing nitrogen to blow away phosgene and hydrogen chloride remained in a reaction solution, and obtaining an organic solution containing the compound shown in the formula (V).
5. The preparation method of the chlorantraniliprole insecticide according to claim 4, wherein in the specific preparation process of the compound shown in the formula (V), the molar ratio of the compound shown in the formula (VI) to phosgene is 1: 1.05-1.5, the temperature of the acyl chlorination reaction is 66-179 ℃, and the time for introducing phosgene is 1-8 h.
6. The preparation method of the chlorantraniliprole insecticide according to any one of claims 1 to 3, wherein the compound represented by the formula (III) is prepared by the following specific steps: mixing the substituted anthranilic acid shown in the formula (IV) with an organic solution containing the compound shown in the formula (V), heating and refluxing to perform amidation reaction, and obtaining an organic solution containing the compound shown in the formula (III) after the reaction is finished.
7. The preparation method of the chlorantraniliprole insecticide as claimed in claim 6, wherein in the specific preparation process of the compound shown in formula (III), the molar ratio of the substituted anthranilic acid shown in formula (IV) to the compound shown in formula (V) is 1: 1, the temperature of the amidation reaction is 66-179 ℃, and the time of the amidation reaction is 0.5-4 h.
8. The preparation method of the chlorantraniliprole insecticide according to any one of claims 1 to 3, wherein the compound represented by the formula (II) is prepared by the following specific steps: keeping the organic solution containing the compound shown in the formula (III) to reflux, introducing phosgene until the compound shown in the formula (III) completely reacts, stopping introducing the phosgene, preserving heat, cooling, introducing nitrogen to blow away the phosgene and hydrogen chloride remained in the reaction solution, and obtaining the organic solution containing the compound shown in the formula (II).
9. The preparation method of the chlorantraniliprole insecticide according to claim 8, wherein in the specific preparation process of the compound shown in the formula (II), the molar ratio of the compound shown in the formula (III) to phosgene is 1: 1.05-1.5, the temperature of the acyl chlorination reaction is 66-179 ℃, and the time for introducing phosgene is 1-8 h.
10. The preparation method of the chlorantraniliprole insecticide according to any one of claims 1 to 3, wherein the target product shown in the formula (I) is prepared by the following specific steps: mixing an organic solution containing a compound shown in a formula (II) with alkylamine or alkylamine hydrochloride, heating and refluxing for amidation reaction, removing 65-85% of solvent after the reaction is finished, cooling, adding water, continuously stirring, filtering and drying to obtain a target product shown in a formula (I);
the alkylamine is methylamine, ethylamine, propylamine, isopropylamine or 1-cyclopropylethylamine, the alkylamine hydrochloride is methylamine hydrochloride, ethylamine hydrochloride, propylamine hydrochloride, isopropylamine hydrochloride or 1-cyclopropylethylamine hydrochloride, the molar ratio of the compound shown in the formula (II) to the alkylamine or alkylamine hydrochloride is 1: 1-1.5, the temperature of the amidation reaction is 66-179 ℃, the time of the amidation reaction is 0.5-4 h, and the mass of water is 0.2-0.5 times of the mass of the compound shown in the formula (VI).
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