CN1943341B - Coupling substance of amino acid and pesticide and its preparing method and use as pesticide - Google Patents

Abstract

The invention relates to the field of pesticides, and discloses a lotus compound of amino acid and pesticides, a preparation method thereof and an application as a pesticide. In the present invention, the carboxyl group of the amino acid compound is directly coupled with the amino group or hydroxyl group of the pesticide molecule, and the two are connected through an amide bond and an ester bond to obtain a new compound whose general formula is as formula (I). The invention couples the amino acid and the pesticide to obtain the lotus compound of the amino acid and the pesticide, which can conduct two-way transport in the phloem of the plant under the mediation of the amino acid as the guiding group in the plant, and show a certain growth point Cumulative. The pesticide after lotion has similar activity to the pesticide before lotion, so that it can be applied by foliar spraying to prevent and control plant root and vascular bundle diseases and pests, and to kill pests, germs or other harmful organisms.

Description

Coupling compound of amino acid and pesticide, preparation method thereof and application as pesticide

technical field

The invention relates to the field of pesticides, in particular to a kind of lotus compound of amino acid and pesticides, its preparation method and its application as pesticides. the

Background technique

Amino acids play an important role in the life activities of plants. In addition to playing a well-known role in protein synthesis, amino acids also play important functions in the primary and secondary metabolism of plants. Some amino acids function in nitrogen source assimilation and source-sink transport, while others are precursors to secondary metabolites such as hormones and plant defense-related substances. For example, glutamic acid, glutamine, aspartic acid and asparagine are mainly used to transfer nitrogen source from source organ to sink tissue, and at the same time store nitrogen under the condition of sufficient nitrogen source for plant growth, Necessary for defense and reproduction. At the same time, nitrogen assimilated into glutamic acid and glutamine can immediately enter plant metabolism, providing nitrogen sources for the synthesis of nucleic acids, amino acids and other nitrogen-containing compounds. In addition, nitrogen assimilated from glutamate and glutamine can also be incorporated into aspartate and asparagine, providing nitrogen for many transaminase reactions. Tryptophan is a precursor compound for the synthesis of auxin IAA, arginine is an important precursor for the synthesis of polyamines, and phenylalanine is an amino acid closely related to plant disease resistance and defense responses, which is synthesized by salicylic acid main precursor compound. the

The conduction of amino acids between different tissues and organs of plants is accomplished through catheters and sieve tubes. The content of amino acids in the exudate of the phloem is generally between 5 and 40 g/L, while the content of amino acids in the exudate of the xylem is Only 0.1~2g/L. It can be seen that the movement of amino acids is mainly through the sieve tube of the phloem, and this process requires specific carriers on the plasma membrane to complete. Amino acid carriers can be divided into two categories according to the specificity and affinity of the substrate and the expression mode in plants. That is to say, these carriers have certain specificity and certain broad-spectrum. At present, most of the regulatory genes of these carrier proteins have been located, and the plants of these carrier protein gene deletions are used to study the physiological functions of many cloned genes. the

Contents of the invention

The object of the present invention is to provide a kind of coupling compound of amino acid and pesticide. the

Another object of the present invention is to provide the preparation method of above-mentioned lotion. the

A further object of the present invention is to provide the application of the above-mentioned lotion compound as a pesticide. the

In order to achieve the above purpose, the present invention combines amino acids and pesticide molecules based on the specificity, broad spectrum and diversity of the amino acid carrier system, and obtains a drug that can be transported by the amino acid carrier without shielding the respective functional binding sites. New compound molecules (couplings of amino acids and pesticides). the

In the present invention, the carboxyl group of the amino acid compound and the amino group or hydroxyl group of the pesticide molecule are directly coupled, and the two are connected through an amide bond and an ester bond to obtain a new compound, and its general formula is as (I) formula:

in:

R1 is the residue after removing the carboxyl group in the amino acid molecule;

R2 is the residue after removing amino hydrogen, or imino hydrogen, or hydroxyl hydrogen in the pesticide molecule with amino, imino or hydroxyl groups. the

The amino acid mentioned above refers to the amino acid whose optical configuration is L-configuration or the amino acid of L-configuration and D-configuration. the

R1 is the preferred following groups:

R2 is the preferred following groups:

The preparation method of the above-mentioned lotion compound of amino acid and pesticide is: utilize amino acid to carry out coupling with the pesticide molecule containing amino group or hydroxyl group, the amino group or other active groups in the amino acid should be protected before coupling, and then coupled with pesticide, Then the protecting group is removed to obtain the compound. the

Compared with the prior art, the present invention has the following beneficial effects: the present invention couples amino acids and pesticides to obtain lotus compounds of amino acids and pesticides, which can be mediated by amino acids in plants in vivo The phloem of plants conducts bidirectionally, and shows a certain accumulation of growth points. The pesticide after lotion has similar activity to the pesticide before lotion, so that it can be applied by foliar spraying to prevent and control plant root and vascular bundle diseases and pests, and to kill pests, germs or other harmful organisms. the

Detailed ways

Example 1 Coupling of alanine and hymexazol, that is, the synthesis of 2-alanine-5'-methyl-isoxazol-3'-yl-ester. the

The specific steps are: dissolve 8.9g L-alanine in 200mL 2mol/L NaHCO ₃ solution, add 18.9g benzyl chloroformate at 0°C, react for 10h, wash twice with 20mL ether, and wash the water phase with 6mol /L of HCl to adjust the pH to about 2, extract 50mL×3 with ethyl acetate, combine the ethyl acetate layers, dry with anhydrous sodium sulfate, concentrate, and precipitate white crystals to obtain compound A, the product weighs 16.8g, and the yield is 75.3 %.

In a fume hood, add 0.01mol of compound A, 0.05mol (3.7mL) of thionyl chloride and 2mL of carbon tetrachloride into a 50mL long-necked flask, add condensation and drying equipment, reflux until no gas is released, evaporate Remove the solvent until no HCl and SO ₂ are released, then add 10 mL of dry dichloromethane, and then evaporate the solvent to obtain compound B, which is directly used for the next reaction.

In a 100mL long-necked flask, dissolve 0.01mol of hymexazol sample in 15mL of distilled dichloromethane, pass through dry nitrogen, add 1.1mL of dry triethylamine, and place in an ice bath 0.01 mol of compound B was added dropwise in a small amount. Reflux at 40°C for 3h, cool to room temperature, react for 10h, follow the progress of the reaction by TLC. After the reaction was completed, 50 mL of dichloromethane was added for dilution, and the mixture was washed with 15 mL of water, 15 mL of 0.5 mol/L HCl solution, 15 mL of NaHCO ₃ saturated solution, and then washed with water until neutral. The organic phase was dried with MgSO ₄ , the solvent was evaporated, and purified by column chromatography, and the mobile phase was gradient elution of petroleum ether and ethyl acetate. The product was a white solid, ie compound C, with a yield of 54%.

Add 0.01 mol of compound C to a 50 mL round bottom flask, add 10 mL of HBr glacial acetic acid solution, react at room temperature for 2 h, evaporate HBr and glacial acetic acid by concentrating under reduced pressure, add 10 mL of water to dissolve, add 1 mol/L NaOH solution until the pH is 9. Extracted three times with ethyl acetate, dried and removed the solvent to obtain the product D as a colorless liquid with a yield of 67%. the

¹ HNMR (400MHz, DCl, D ₂ O) δ of target compound C: 1.49 (d, J=7.1, 3H, CH ₃ -CN), 2.31 (s, 3H, CH ₃ -isoxazol), 3.81-3.85 (m , 1H, CH-N), 5.55 (s, 1H, CH(in isoxazol)).

Example 2 Synthesis of the lotus compound of glutamic acid and seed dressing, namely: 2-amino-5-(4'-methyl-5'-(benzamido)-thiazol-2-yl-amino) - Synthesis of 5-oxopentanoic acid.

The specific steps are: add 0.375mol (31.5g) of NaHCO ₃ into a 500mL three-necked flask, and dissolve it in 200mL of H ₂ O. An electric stirrer is equipped with a thermometer, a dropping funnel and a reflux device. Slowly add 0.1mol (14.7g) of glutamic acid at room temperature and stir while adding. Then place it in a water bath at 0°C, slowly add 0.11mol (18.9g) benzyl chloroformate dropwise, the temperature is controlled at 0-5°C, after the addition is completed, slowly rise to room temperature, react for 24h, wash the water phase with 30mL ether, Then acidify to pH=2 with 6mol/L HCl, extract 3 times with ethyl acetate, 50mL each time, the extract is dried with anhydrous _MgSO4 , evaporate the solvent, product A is a white solid, weighs 25g, and the yield is 89% %.

In a 500mL long-necked flask, dissolve 0.04mol of compound A in 200mL of toluene, equipped with a Dean-Stark water separator and a reflux condenser, add 0.08mol (2.4g) of paraformaldehyde and 0.0024mol (0.46g )p-Toluenesulfonic acid. The mixture was refluxed for about 3 h until the azeotrope separation was complete. After cooling, add 50 mL of ethyl acetate, separate the organic phase, wash with 4 mL of 0.3 mol/L K ₂ CO ₃ solution, wash with water 3 times, dry over MgSO ₄ , evaporate the solvent to obtain compound B, the product is viscous like liquid, yield 81%.

In a fume hood, add 0.01mol of compound B, 0.05mol (3.7mL) of thionyl chloride and 2mL of carbon tetrachloride into a 50mL long-necked flask, add condensation and drying equipment, reflux until no gas is released, evaporate Remove the solvent until no HCl and SO ₂ are released, then add 10 mL of dry dichloromethane, and then evaporate the solvent to obtain compound C, which is directly used for the next reaction.

In a 100mL long-necked flask, dissolve 0.01mol (2.33g) of the original drug sample of Seedlingling in 25mL of tetrahydrofuran dried over sodium metal, pass through dry nitrogen, add 1.1mL of dry triethylamine, and place in an ice bath 0.01 mol of compound C was added dropwise in small portions. Reflux at 60°C for 3h, cool to room temperature, react for 15h, and follow the progress of the reaction by TLC. After the reaction was completed, THF was evaporated under reduced pressure, the system was dissolved in 50 mL of dichloromethane, the mixture was washed with 15 mL of water, 15 mL of 0.5 mol/L HCl solution, 15 mL of NaHCO ₃ saturated solution, and then washed with water until neutral. The organic phase was dried with MgSO ₄ , the solvent was evaporated, and purified by column chromatography, and the mobile phase was gradient elution of petroleum ether and ethyl acetate. The product was a white solid, ie compound D, with a yield of 76%.

Add 0.01mol of compound D to a 50mL round bottom flask, add 10mL of HBr glacial acetic acid solution, react at room temperature for 2h, concentrate under reduced pressure to evaporate HBr and glacial acetic acid, add methanol to dissolve, then evaporate to dryness, add a small amount of 5% Dissolve acetic acid, then add 2% NaOH solution dropwise until pH = 7, at this time a large amount of precipitate will appear, filter, wash the precipitate twice with 10mL water, dry, and recrystallize with methanol to obtain white solid E, the yield 88%. the

Target product E, ¹ HNMR (400MHz, DCl, D ₂ O) δ: 1.89-2.11 (m, 2H, OOC-C-CH2), 2.50 (s, 3H, CH3-thiazol), 2.53-2.66 (m, 2H , OC-CH2-), 3.34-3.39 (m, 1H, OOC-CH-C), 7.05-7.66 (m, 5H, -C6H5), 12.41 (s, 1H, -COOH); ¹³ CNMR (400MHz, DCl , D ₂ O)δ: 17.2, 21.5, 22.4, 25.0, 26.2, 30.5, 31.4, 51.3, 119.0, 120.5(2C), 123.7, 128.6(2C), 138.9, 151.3, 157.2, 160.7, 170.5, 170.7; MS m/z: 725.2[2M+H] ⁺ , 363[M+H] ⁺ , 234.0[M-C5H8NO3] ⁺ .

Example 3 Coupling of γ-aminobutyric acid and fipronil, namely: 4-amino-N-[3-cyano-1-(2,6-dichloro-4-trifluoromethylphenyl)- Synthesis of 4-trifluoromethylsulfinyl-1H-pyrazol-5-yl]butanamide

Concrete steps: add phthalic anhydride, aminobutyric acid, triethylamine (molar ratio is 1: 1: 1.5) and toluene respectively in the 100mL there-necked flask equipped with stirrer, thermometer, drying tube and heating device, heat Refluxed for 5h, cooled to room temperature, poured into cold water, precipitated, filtered and dried to obtain white solid A. the

Put compound A and thionyl chloride (re-distilled before use) into a 100mL three-neck flask with a molar ratio of 1:1.2, install a stirrer, reflux condenser (with a drying tube) and a thermometer, reflux and stir the reaction without gas escape , about 5h. The gas released during the reaction was absorbed with an aqueous solution of sodium hydroxide, and the final system was a light yellow clear solution. After cooling to room temperature, transfer it to a 100mL single-necked round-bottomed flask, first distill off excess thionyl chloride under reduced pressure with a water pump, and then distill the residual liquid under reduced pressure with an oil pump to obtain light yellow solid B. the

Add fipronil, triethylamine, 4-N, N-dimethylaminopyridine (the molar ratio is 1:1.3: 0.1) and an appropriate amount of chloroform at 0 ° C, slowly drop 1.2 equivalents of compound B, naturally rise to room temperature, heat to reflux for 10 h, cool to room temperature, wash the organic layer with 2 × 20mL 1% dilute hydrochloric acid, and then wash with 2 ×30mL of distilled water was washed, the organic layer was dried with anhydrous sodium sulfate, and the solvent was precipitated to obtain a thick product, which was separated by gradient elution column chromatography using ethyl acetate and petroleum ether as solvents to obtain compound C. the

Add appropriate amount of methanol and compound C into a 50mL three-neck flask equipped with a stirrer, dropping funnel, drying tube and heating device, slowly drop in hydrazine hydrate (molar ratio 1:2), and stir at room temperature until the reaction is complete. Extract with dichloromethane, dry the organic phase with anhydrous sodium sulfate, and extract the solvent to obtain a white solid, which is separated by gradient elution column chromatography using ethyl acetate and petroleum ether as solvents to obtain the target compound D. The product is a white solid with a melting point of 149.1-149.3°C and a yield of 36.9%. ¹ HNMR (400MHz, CDCl ₃ ) δ: 8.87 (1H, s, NH), 7.75, 7.73 (each 1H, s, H-3' and H-5'), 3.54 (2H, m, H ₂ -1" ), 2.59 (2H, m, H ₂ -3"), 2.12 (2H, m, H ₂ -2").

Example 4 Conductivity Experiment 1

The lotus root compound of glutamic acid and Seed Dressing Spirit was applied to the leaves of tobacco at a concentration of 200mg/L, and after the hydroponic treatment, the liquid chromatography was used to measure the content of the lotus compound in various parts of the plant, as shown in Table 1 shown. the

Table 1 The content of various parts of post-emergence tobacco plants treated with lotus seed dressing spirit and glutamic acid (μg/g fresh sample)

The result explanation in table 1, after the seed-dressing spirit handles the tobacco blade, the content of the seed-dressing spirit in the treated blade reaches a peak at 48h, and the content of the seed-dressing spirit in the top growth point also increases gradually, and the content of the seed-dressing spirit in the stem There was no obvious rule in the change of content, and the existence of seed dressing spirit was not detected in the root. Compared with Seed Dressing Spirit, after the leaves were treated with the lotus compound of glutamic acid, the content of the lotus compound in the treated leaves reached the maximum at 24 hours, and the content in the leaves quickly reached 9.45 μg/g at 12 hours (fresh weight), and dropped rapidly to 6.2 μg/g at 36h, and then dropped slightly at 48h. Correspondingly, at the top growth point, the maximum absorption was also reached at 24h, reaching 3.73μg/g, and at the initial stage of treatment, the content of lotus root at the growth point was significantly higher than that of the plants treated with Seed Dressing Spirit. In the stem, the content of lotus compound was around 1 μg/g in the whole stage of the determination, but in the root, the content of lotus compound reached the maximum at 36h, and exceeded the content of the top growth point and the stem, showing that the Compounds can be taken up by plant leaves, moved through the phloem and accumulated towards growth points. the

Example 5 Conductivity Experiment 2

The lotus compound of aminobutyric acid and fipronil was applied to Chinese kale at a concentration of 200mg/L, and after the leaf coating and hydroponic treatment were carried out, the content of the lotus compound in each part of the plant was determined by liquid chromatography, as shown in the table 2. the

Table 2 Determination results of GABA and fipronil lotus root hydroponic treatment of kale in various parts of the plant

Table 3 Determination results of the content of GABA and fipronil in various parts of Chinese kale after leaf coating

The results in Table 2 show that the coupling of fipronil and γ-aminobutyric acid can conduct from bottom to top in kale plants after hydroponics, and this conduction decreases with the distance from the root, stem and leaf to the solution. It can be seen from Table 3 that the content changes in various parts of Chinese cabbage were treated by the lotus leaf coating method of fipronil and γ-aminobutyric acid. A certain amount of lotion exists, and the content reaches the maximum at 24 hours, so fipronil and γ-aminobutyric acid have the characteristic of bidirectional conduction after coupling. the

Example 6 Conductivity Experiment 3

Conductivity test of the lotus compound of glycine and acetamiprid on tobacco plants The concentration of 200mg/L of the lotus compound of glycine and acetamiprid is applied to the leaves in the middle part of tobacco plants at the 10-13 leaf stage. The content of lotus root in the leaves and their upper and lower parts treated at different times was determined by phase chromatography. The results are listed in Table 4. The results in Table 4 show that after coupling acetamiprid with glycine, the conduction tends to be strengthened to the plant growth point, and can be conducted downwards. the

Table 4 The content of lotus compound in leaves of different parts of tobacco plants treated with the lotus compound of glycine and acetamiprid

Example 7 Conductivity Experiment 4

Conductivity test of the lotus compound of alanine and acetamiprid on tobacco plants Apply the lotus compound of alanine and acetamiprid at a concentration of 200mg/L to the leaves in the middle part of tobacco plants at the 10-13 leaf stage Leaf treatment, liquid chromatography was used to determine the content of lotus in the leaves and their upper and lower parts treated at different times. The results are listed in Table 5. The results in Table 5 show that after coupling acetamiprid with alanine, it can not only conduct to the upper part of the plant, but also can conduct downward to the root. the

Table 5 The content of lotus root in different parts of tobacco plants treated with alanine and acetamiprid

Example 8 Conductivity Experiment 5

Conductivity test of the lotus compound of valine and acetamiprid on tobacco plants Apply the lotus compound of valine and acetamiprid at a concentration of 250 mg/L to the leaves in the middle part of tobacco plants at the 10-13 leaf stage Leaf treatment, liquid chromatography was used to determine the content of lotus root in the leaves treated at different times and the upper and lower parts of the leaves. The results are listed in Table 6. The results in Table 6 show that after coupling acetamiprid with valine, the conduction tends to be strengthened to the plant growth point, and can be conducted downwards. the

Table 6 The content of lotus in leaves of different parts of tobacco plants treated with valine and acetamiprid

Example 9 Conductivity Experiment 6

Conductivity test of the lotus compound of lysine and acetamiprid on tobacco plants Apply the lotus compound of lysine and acetamiprid at a concentration of 200 mg/L to the leaves in the middle part of tobacco plants at the 10-13 leaf stage Leaf treatment, liquid chromatography was used to determine the content of lotus root in the leaves treated at different times and the upper and lower parts of the leaves. The results are listed in Table 7. After coupled with acetamiprid and lysine, it has a tendency to strengthen the conduction to the plant growth point, and can conduct downward. the

Table 7 The content of lotus compound in different parts of leaves after treatment of tobacco plants with lotus compound of lysine and acetamiprid

Example 10 Conductivity Experiment 7

Conductivity test of glycine and pyrizone lotus compound on tobacco plants: apply 200mg/L concentration of glycine and pyrizone lotus compound to leaves in the middle part of tobacco plants at the 10-13 leaf stage. The content of lotus root in the leaves and their upper and lower parts treated at different times was determined by phase chromatography. The results are shown in Table 8. After glycine is coupled with pyrizone, it has a tendency to strengthen the conduction to the plant growth point, and can conduct downward. the

Table 8 The content of lotus compound in leaves of different parts of tobacco plants treated with glycine and pyrizone lotus compound

Example 11 Conductivity Experiment 8

The conductivity test of the lotus compound of alanine and pyrizone on tobacco plants: the 200 mg/L concentration of the lotus compound of alanine and pyrizone was tested on the leaves of the middle part of tobacco plants at the 10-13 leaf stage. Leaves were treated with liquid chromatography to determine the content of lotus root in the leaves treated at different times and the upper and lower parts of the leaves. The results are shown in Table 9. After alanine is coupled with pyrizone, the conduction tends to be strengthened to the plant growth point, and can be conducted downwards. the

Table 9 The content of lotus compound in different parts of leaves after treatment of tobacco plants with lotus compound of alanine and pyrizazone

Example 12 Conductivity Experiment 9

Conductivity test of the lotus compound of phenylalanine and pyrizone on tobacco plants The concentration of 200 mg/L of the lotus compound of phenylalanine and pyrizone was applied to the leaves in the middle part of tobacco plants at the 10-13 leaf stage. Leaves were coated, and the content of lotus root in leaves and other parts of plants treated at different times was determined by liquid chromatography. The results are listed in Table 10. After pyrizazone is coupled with phenylalanine, it has a tendency to strengthen the transmission to the plant growth point, and can also conduct downward to the root of the plant. the

Table 10 The content of lotus in different parts of tobacco plants treated with phenylalanine and hydrazone lotus

Example 13 Conductivity Experiment 10

The conductivity test of the lotus compound of valine and pyrizone on tobacco plants: the 200 mg/L concentration of the lotus compound of valine and pyrizone was tested on the leaves in the middle part of tobacco plants at the 10-13 leaf stage. Leaves were treated with liquid chromatography to determine the content of lotus root in the leaves treated at different times and the upper and lower parts of the leaves. The results are shown in Table 11. After valine is coupled with pyrizazone, the conduction tends to be strengthened to the plant growth point, and can be conducted downwards. the

Table 11 The content of lotus root in different parts of leaves after treatment of tobacco plants with lotus compound of valine and hydrazone

Example 14 Conductivity Experiment 11

Conductivity test of the lotus compound of proline and pyrizone on tobacco plants Apply the 200 mg/L concentration of the lotus compound of proline and pyrizone to the leaves in the middle part of tobacco plants at the 10-13 leaf stage Leaf treatment, liquid chromatography was used to determine the content of lotus root in the leaves treated at different times and the upper and lower parts of the leaves. The results are listed in Table 12. After proline is coupled with pyrizazone, it can conduct in both directions up and down in the plant. the

Table 12 The content of lotus compound in different parts of leaves after treatment of tobacco plants with proline and hydrazone lotus

Example 15 Conductivity Experiment 12

The conductivity test of the lotus compound of leucine and pyrizone on tobacco plants: the 200mg/L concentration of the lotus compound of leucine and pyrizone was tested on the leaves of the middle part of tobacco plants at the 10-13 leaf stage. Leaves were treated with liquid chromatography to determine the content of lotus root in the leaves treated at different times and the upper and lower parts of the leaves. The results are shown in Table 13. After leucine is coupled with pyrizone, the conduction tends to be strengthened to the plant growth point, and can be conducted downwards. the

Table 13 The content of lotus compound in different parts of leaves after treatment of tobacco plants with leucine and pyrizazone lotus compound

Example 16 Conductivity Experiment 13

Conductivity test of the lotus compound of aspartic acid and pyrizone on tobacco plants The concentration of 200 mg/L of the lotus compound of aspartic acid and pyrizone was applied to the leaves in the middle part of tobacco plants at the 10-13 leaf stage Leaves were coated, and the content of lotus root in leaves and other parts of plants treated at different times was determined by liquid chromatography. The results are listed in Table 14. After aspartic acid is coupled with pyrizone, it can conduct in both directions up and down in the plant body, and can accumulate to a certain extent at the growth point. the

Table 14 The content of the lotus compound in different parts of the tobacco plants treated with the lotus compound of aspartic acid and hydrazone

Example 17 Conductivity Experiment 14

The conductivity test of the lotus compound of glycine and triadimenol on tobacco plants: the leaves of the middle part of the tobacco plant at the 10-13 leaf stage were coated with a concentration of 200 mg/L of the lotus compound of glycine and triadimenol. Liquid chromatography was used to determine the content of lotus root in the leaves treated at different times and the upper and lower parts of the leaves. The results are listed in Table 15. After glycine is coupled with triadimenol, it can conduct in both directions up and down in the plant body, thus changing the characteristic that triadimenol can only conduct to the top. the

Table 15 The content of lotus in different parts of leaves after treatment of tobacco plants with glycine and triadimenol

Example 18 Conductivity Experiment 15

Conductivity test of the lotus compound of glutamic acid and triadimenol on tobacco plants Apply the 200 mg/L concentration of the lotus compound of glutamic acid and pyrizone to the leaves in the middle part of tobacco plants at the 10-13 leaf stage Leaf treatment, liquid chromatography was used to determine the content of lotus root in leaves and other parts of plants treated at different times. The results are listed in Table 16. After triadimenol is coupled with glutamic acid, the conduction characteristics of triadimenol in the plant body are changed, and it can be conducted in two directions up and down in the plant body, and can accumulate to a certain extent at the growth point. the

Table 16 The content of lotus in different parts of tobacco plants treated with glutamic acid and triadimenol

Example 19 Conductivity Experiment 16

The conductivity test of the lotus compound of serine and diniconazole on tobacco plants The concentration of 200mg/L of the lotus compound of serine and diniconazole is applied to the leaves in the middle part of tobacco plants at the 10-13 leaf stage. The content of lotus root in leaves and other parts of plants treated at different times was determined by phase chromatography. The results are listed in Table 17. After serine is coupled with diniconazole, it can conduct in both directions up and down in the plant body. the

Table 17 The content of lotus in leaves of different parts of tobacco plants treated with lotus of serine and diniconazole

Example 20 Conductivity Experiment 17

Conductivity test of the lotus compound of threonine and hymexazol on tobacco plants Apply the 200mg/L concentration of the lotus compound of threonine and hymexazol to the leaves in the middle part of tobacco plants at the 10-13 leaf stage Leaf treatment, liquid chromatography was used to determine the content of lotus root in leaves and other parts of plants treated at different times. The results are listed in Table 18. After threonine is coupled with hymexazol, it can conduct in both directions up and down in the plant body. the

Table 18 The content of lotus root in leaves of different parts of tobacco plants treated with threonine and hymexazol lotus

Example 21 Conductivity Experiment 18

Conductivity test of the lotus compound of tryptophan and hymexazol on tobacco plants Apply the lotus compound of tryptophan and hymexazol at a concentration of 200mg/L to the leaves in the middle part of tobacco plants at the 10-13 leaf stage Leaves were treated, and the content of lotus root in leaves treated at different times and other leaves of plants was determined by liquid chromatography. The results are listed in Table 19. After tryptophan is coupled with hymexazol, it can conduct in both directions up and down in the plant body. the

Table 19 The lotus content in leaves of different parts of tobacco plants treated with tryptophan and hymexazol lotus

Example 22 Conductivity Experiment 19

Conductivity test of the lotus compound of alanine and hymexazol on tobacco plants Apply the lotus compound of alanine and hymexazol at a concentration of 200 mg/L to the leaves in the middle part of tobacco plants at the 10-13 leaf stage Leaves were treated, and the content of lotus root in leaves treated at different times and other leaves of plants was determined by liquid chromatography. The results are listed in Table 20. After alanine is coupled with hymexazol, it can conduct in both directions up and down in the plant body. the

Table 20 Alanine and hymexazol lotus content in different parts of leaves after treatment of tobacco plants

Example 23 Insecticide experiment 1

Toxicity test of γ-aminobutyric acid and fipronil lotion on 3rd instar larvae of Plutella xylostella xylostella: Select clean fresh cabbage leaves (avoid the main vein). According to the concentration range of toxicity determination determined by the preliminary test, dissolve the original medicine for testing with acetone at 5 to 6 concentrations, soak the leaves in the medicine solution for about 5 seconds, take them out and dry them, put them into a pad with moisturizing filter paper, with a diameter of Insert the 3rd instar larvae of Plutella xylostella of the same size into a 7.5cm petri dish, and then place them in an insect culture room [temperature: 26-28°C, relative humidity: 70-80%, light: 14h:10h (L:D) ]. The solvent was used as the control, and fipronil was used as the drug control. Each treatment was repeated 4 times, and each repetition had 10 test insects. The number of dead insects was checked after 24 and 48 hours of treatment. The mortality rate and adjusted mortality rate were calculated, and the LC ₅₀ value and LC ₅₀ 95% confidence interval were calculated according to the linear regression line equation. It can be seen from Table 21 that the biological activity of the conjugated fipronil and γ-aminobutyric acid is higher than that of fipronil.

Table 21 Determination of the toxicity of fipronil and γ-aminobutyric acid lotus compound and fipronil to 3rd instar larvae of Plutella xylostella

Example 24 Insecticidal experiment 2

Toxic activity test of glycine and carbofuran lotion on housefly adults: first accurately weigh 1g of white sugar in a test tube with a diameter of 2.5cm and a height of 7.5cm, then dissolve the sample with acetone, and take 1mL of the sample solution Put it in a test tube of white granulated sugar, shake well, so that the sample can evenly adhere to the white granulated sugar, and dry it with a fan for later use. Pick houseflies that are neat and consistent 3 to 4 days after eclosion, anesthetize with ether, and quickly insert 10 houseflies into each tube. Three concentrations were set for activity determination: 50, 25 and 12.5 μg·mL ^-1 , and three replicates were set for each treatment, with 10 worms in each replicate. Acetone was used as blank control and carbofuran at the same concentration was used as drug comparison. After 24 hours of treatment, the reaction of the test insects was observed, and the number of dead insects was recorded, and the mortality rate and corrected mortality rate were calculated. Calculate the LC ₅₀ value and LC ₅₀ 95% confidence interval according to the linear regression line equation. It can be seen from Table 22 that the biological activity of carbofuran and glycine coupled to adults of housefly is higher than that of carbofuran.

Table 22 Determination of toxicity of carbofuran and glycine lotion and carbofuran to adults of housefly

Example 25 Sterilization experiment 1

The mycelial growth rate inhibition method was used to measure the indoor antibacterial activity of hymexazol and glutamic acid lotus, and the original powder of hymexazol was used as a control to calculate the inhibition rate of the liquid on mycelium growth, and to calculate the effect of the medicine on rice. _EC50 for Rhizoctonia solani. It can be seen from Table 23 that the biological activity of hymexazol-glutamic acid conjugate is equivalent to that of hymexazol.

Table 23 Determination results of hymexazol-glutamic acid lotion and hymexazol bactericidal activity

Example 26 Bactericidal experiment 2

The mycelial growth rate inhibition method was used to measure the indoor antibacterial activity of dressing lingling and glycine lotion respectively, and the original powder of dressing lingling was used as a control to calculate the inhibitory rate of the liquid on mycelium growth, and to calculate the effect of the medicament on rice sheath blight. EC ₅₀ of pathogens. It can be seen from Table 24 that the biological activity of the compound of seed-dressing spirit and glycine is equivalent to that of seed-dressing spirit.

Table 24 Determination of bactericidal activity of Seed Dressing Ling and Glycine lotion and Dressing Ling

Claims (3)

1. the conjugate of amino acid and agricultural chemicals, general formula are like (I) formula:

Wherein:

R1 is except that the residue behind the decarboxylate in the amino acid molecular;

R2 has in the pesticide molecule of hydroxyl, removes the later residue of hydroxyl hydrogen;

R1 is for being selected from following groups:

R2 is for being selected from following groups:

2. conjugate as claimed in claim 1 is characterized in that said amino acid is meant that optical configuration is the amino acid of L-configuration or the amino acid of L-configuration and D-form.

3. claim 1 or 2 said conjugates are as the application in insecticide or the bactericide.