Rimsulfuron is a common herbicide used to control weeds, especially the growth of glyphosate-tolerant herbaceous weeds, such as barley grass, goosegrass, black grass, and amaranth. Rimsulfuron is a post-emergent herbicide that can be applied by foliar spray or soil application. It is an excellent glyphosate herbicide widely used in agricultural production around the world.
The mechanism of action of Rimsulfuron is to inhibit the synthesis of urocorlin in the photosynthetic electron transport system, interfere with the growth and photosynthesis of herbaceous weeds, and cause plant death. Rimsulfuron can also control foxtail, tall fescue and other multi-herbicide-resistant herb weeds with broad-spectrum and high efficacy.
Uses of Rimsulfuron in Agriculture:
1. In agricultural production, Rimsulfuron is often used as a herbicide. It can be used in the weeding of corn, wheat, soybeans, vegetables and other crops. It can not only control some common monocot weeds such as stink grass, sedge, barnyard grass, Inula, etc., can also have a good control effect on perennial hard-to-control herbaceous weeds such as foxtail and Polygonaceae.
2. Rimsulfuron can be applied in spring and autumn, which has little impact on crops and can effectively improve the yield and quality of crops.
3. Due to the short half-life and low risk of Rimsulfuron, it is considered as a relatively safe chemical substance that will not cause too much harm to agricultural products and the environment.
4. Rimsulfuron is often mixed with other herbicides to achieve better results. It can be mixed with glyphosate, chlorpyrifos, glufosinate and other chemical substances, which can not only make up for the poor effect on some herb weeds, It can also reduce the use of chemical substances and reduce the pollution to the environment.
In conclusion, Rimsulfuron is a high-efficiency, broad-spectrum and safe herbicide, which can play an important role in the weeding of agriculture and lawns.
In production, the synthesis method of Rimsulfuron can adopt many different routes, including methods such as chemical synthesis and fermentation. This article will introduce several synthetic methods of Rimsulfuron.
1. Chemical synthesis method:
The chemical synthesis method of Rimsulfuron mainly uses thiourea derivatives as precursors, and synthesizes Rimsulfuron through multi-step reactions. Thiourea compound is used as the precursor of Rimsulfuron because Rimsulfuron itself is composed of thiourea compound and phenol cyclopropyl ether. Several common chemical synthesis methods are introduced below:
The first method: use the reaction of phenylpropylene compound and aminoethyl cyanate as the starting material to generate β-aminosulfonyl ethyl acrylate, and then generate the corresponding benzylated product through benzylation reaction, and then pass through N-sulfonyl The acylation reaction produces thiourea compounds, and the condensation reaction with phenol cyclopropyl ether produces the final Rimsulfuron product.
The second method: use the original material as thiourea group or thiourea ester, synthesize a variety of thiourea ether-based compounds through fluorochlorophosphating reaction, and then perform condensation reaction with phenol cyclopropyl ether to generate the final Rimsulfuron product.
The third method: use methyl benzoyl methanesulfonate and benzoic acid for condensation reaction to generate N-phenylethanolamine, then react with acetone and thiourea to generate Rimsulfuron’s precursor thiourea compound, and finally add phenol ring Propyl ether undergoes condensation reaction to synthesize the final Rimsulfuron product.
2. Fermentation method:
In addition to chemical synthesis, Rimsulfuron can also be produced by fermentation. The fermentation method is to cultivate microorganisms and use the metabolic reactions of microorganisms to produce target products. Two common fermentation routes of Rimsulfuron are introduced below:
The first method: use Streptomyces hygroscopicus bacteria, culture and grow them, and then use potassium nitrate and other doses to stimulate microbial metabolic activities to produce Rimsulfuron products.
The second method: use bacteria such as Pseudomonas fluorescens and Pseudomonas putida to grow and culture in the same way, and then use thiourea, acetic acid and other doses to stimulate microbial metabolic activities to produce Rimsulfuron products.
Both chemical synthesis and fermentation of rimsulfuron have their advantages and disadvantages. In production, usually choose different routes according to the specific situation. At present, a variety of efficient production methods have been widely used, the output has been greatly increased, and the goal of sustainable development has been achieved.
1. Physical and chemical properties:
The molecular formula of Rimsulfuron is C14H16N8O6S, the relative molecular mass is 438.40 g/mol, and its appearance is light yellow to white crystal. Rimsulfuron has a melting point of 169-170 °C, a boiling point of more than 300 °C and a density of 1.79 g/cm³. Rimsulfuron is easily soluble in water, ethanol, acetone and methylene chloride, slightly soluble in ether and benzene.
2. Stability:
Rimsulfuron is stable at room temperature, but it is easily decomposed by ultraviolet light and high temperature. Rimsulfuron can be stable under the conditions of dilute acid and dilute alkali, but it will decompose under the environment of strong acid and strong alkali. In addition, Rimsulfuron can also gradually decompose in the soil, and its decomposition rate depends on factors such as soil pH, organic matter content, temperature and moisture.
3. Thermodynamic properties:
The thermodynamic properties of Rimsulfuron are a key point in its research, and understanding its thermodynamic properties helps to better understand its behavior in chemical reactions. Rimsulfuron is a fat-soluble substance that is not very soluble in water.
4. Chemical information:
Rimsulfuron has good herbicidal activity and mainly acts on the domain B of inactivated amino acid synthase (ALS), thereby preventing the production of amino acids in plant cells. The pharmacodynamic effect of Rimsulfuron is mainly through absorption on the leaf surface of the plant leaves, and then being transported to the main transport ducts or organelles of the leaves and gradually activated. The chemical structure of Rimsulfuron contains various functional groups, such as pyrazole, pyrimidine and imidazole, etc. These functional groups play an important role in the glyphosate herbicide activity of Rimsulfuron. In addition, Rimsulfuron can also undergo chemical reactions in soil, such as hydrogenation reduction, addition, esterification and hydroxylation reactions.
In conclusion, Rimsulfuron is a glyphosate herbicide with good herbicidal activity and broad application prospects. It is described in terms of its physicochemical properties, stability, thermodynamic properties and other relevant chemical information, which will help to better understand the chemical properties and application scenarios of Rimsulfuron.