Synthesis process of high cis-lambda-cyhalothric acid

A technology of kung fu chrysanthemic acid and synthesis process, which is applied to the separation/purification of carboxylic acid compounds, the preparation of carboxylic acid esters, the preparation of oxygenated compounds, etc. Questions about the effect of cis-kungfu chrysanthemic acid concentration, etc.

Inactive Publication Date: 2020-12-29
泰兴市新宏阳化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The prior art has the following deficiencies: other substances will be produced in the synthesis of the existing high-cis chrysanthemic acid, and the phenomenon of incomplete reaction will occur in the reaction, which reduces the effect of the concentration of the high-cis chrysanthemic acid, and Crystallized high cis chrysanthemic acid is impure

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  • Synthesis process of high cis-lambda-cyhalothric acid

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Embodiment 1

[0040] Embodiment 1, a kind of synthesis technique of high cis chrysanthemic acid provided by the present invention, comprises the following preparation steps:

[0041] S1: Add quantitative glycine and concentrated hydrochloric acid into the reaction kettle, the weight of glycine and concentrated hydrochloric acid is: 100 grams;

[0042] Glycine, also known as aminoacetic acid, is a non-essential amino acid with a chemical formula of C2H5NO2. Glycine is a constituent amino acid of endogenous antioxidant reducing glutathione. The body is often supplemented with exogenous sources when severe stress occurs. Sometimes it is also called semi essential amino acids;

[0043] Concentrated hydrochloric acid is a concentrated hydrogen chloride solution, the chemical formula is HCl, a gaseous aqueous solution, mainly used to produce various chlorides, aniline and dyes and other products;

[0044] The reaction kettle has a physical or chemical reaction container. Through the structural d...

Embodiment 2

[0070] Embodiment 2, the synthetic technique of a kind of high cis chrysanthemic acid provided by the present invention, comprises the following preparation steps:

[0071] S1: Add quantitative glycine and concentrated hydrochloric acid into the reaction kettle, the weight of glycine and concentrated hydrochloric acid is: 120 grams;

[0072] Glycine, also known as aminoacetic acid, is a non-essential amino acid with a chemical formula of C2H5NO2. Glycine is a constituent amino acid of endogenous antioxidant reducing glutathione. The body is often supplemented with exogenous sources when severe stress occurs. Sometimes it is also called semi essential amino acids;

[0073] Concentrated hydrochloric acid is a concentrated hydrogen chloride solution, the chemical formula is HCl, a gaseous aqueous solution, mainly used to produce various chlorides, aniline and dyes and other products;

[0074] The reaction kettle has a physical or chemical reaction container. Through the structur...

Embodiment 3

[0100] Embodiment 3, the synthetic technique of a kind of high-cis chrysanthemic acid provided by the present invention, comprises the following preparation steps:

[0101] S1: Add quantitative glycine and concentrated hydrochloric acid into the reaction kettle, the weight of glycine and concentrated hydrochloric acid is: 140 grams;

[0102] Glycine, also known as aminoacetic acid, is a non-essential amino acid with a chemical formula of C2H5NO2. Glycine is a constituent amino acid of endogenous antioxidant reducing glutathione. The body is often supplemented with exogenous sources when severe stress occurs. Sometimes it is also called semi essential amino acids;

[0103] Concentrated hydrochloric acid is a concentrated hydrogen chloride solution, the chemical formula is HCl, a gaseous aqueous solution, mainly used to produce various chlorides, aniline and dyes and other products;

[0104] The reaction kettle has a physical or chemical reaction container. Through the structur...

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Abstract

According to the technical scheme, the synthesis process of high cis-lambda-cyhalothric acid comprises the following preparation steps: S1, adding a certain amount of glycine and concentrated hydrochloric acid into a reaction kettle, S2, heating the reaction kettle to enable glycine and concentrated hydrochloric acid to generate an aqueous solution, S3, carrying out vacuum dehydration on the aqueous solution to obtain solid powder, and S4, adding a certain amount of ethanol, hydrochloric acid and aqueous agent into the solid powder, heating and stirring. S5, crystallizing the heated and stirred solvent at a proper temperature; S6, centrifugally drying the crystals; S7, dissolving the centrifugally dried powder with water, and adding a certain amount of dichloroethane into the reaction kettle; S8, stirring and cooling the solvent; S9, and adding a certain amount of sodium nitrite into the stirred and cooled solvent. The invention disclosed by the invention has the beneficial effects that the concentration of the prepared high-cis-form lambda-cyhalothric acid is high, and the crystallized high-cis-form lambda-cyhalothric acid is pure.

Description

technical field [0001] The invention relates to the field of high-cis chrysanthemic acid, in particular to a synthesis process of high-cis chrysanthemic acid. Background technique [0002] High cis chrysanthemic acid, also known as Z-(1R,S)cis-2,2-dimethyl-3-(2-chloro-3,3,3-trifluoro-1-propenyl)cyclopropane Carboxylic acid, Z-cis-trifluoropermethric acid, Cis-TFP acid, the molecular formula is C9H10ClF3O2, the relative molecular weight is 242.63, and the CAS number is 72748-35-7. [0003] Appearance is white crystal (racemate), melting point is 108-110°C, has special smell, no irritation, insoluble in water, easy to vaporize, is a high-efficiency and low-toxic insecticide Kung Fu Chlorothrin (also known as cyhalothrin ), bifenthrin and tefluthrin are three important intermediates of pyrethroid pesticides. [0004] There are two asymmetric stereo conformation centers in the structural formula of high cis chrysanthemic acid, one is a three-membered ring and the other is an e...

Claims

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Application Information

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IPC IPC(8): C07C227/18C07C229/08C07C245/20C07C67/347C07C69/747C07C27/02C07C51/43C07C61/40
CPCC07C227/18C07C245/20C07C67/347C07C51/09C07C51/43C07C2601/02
Inventor 朱向阳
Owner 泰兴市新宏阳化工有限公司
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