UNSATURATED SULFUR CONTAINING-OXIME ETHER COMPOUNDS WITH FUNGICIDAL ACTIVTY AND THEIR PREPARATION

Multifunctional spoken English learning machine

The utility model belongs to the technical field of school supplies. The utility model relates to a learning machine, in particular to a multifunctional spoken English learning machine. Learning machine body, the outer edge of the learning machine body is sleeved with a protective sleeve. The periphery of the protective sleeve is coated with a coating external member; wherein the coating suite iscomposed of a head end fixing section, a supporting section, a lower end connecting section, a cover section, an upper end connecting section and a tail end connecting section which are connected in sequence, the head end fixing section is connected to the back face of the protective sleeve, and the lower end connecting section and the upper end connecting section are correspondingly arranged corresponding to the lower end and the upper end of the learning machine body respectively. According to the utility model, the protective sleeve, the coating sleeve piece, the elastic band and the handleare ...

Preparation method of polycarbonate

The invention discloses a preparation method of polycarbonate (PC). The preparation method comprises the following steps of: reacting alkali liquor, bisphenol A (also called BPA), a molecular weight regulator and sodium sulfite along with agitating to generate a BPA alkali salt; adding an active reaction substance, namely, 4-hydroxybenzyl chloride or p-hydroxylbenzyl quaternary ammonium salt, to pre-polymerize with a phosgene solution to obtain a prepolymer; adding alkali liquor to perform condensation polymerization to obtain the PC with molecular weight of 5000 to 100000, wherein if the active reaction substance is 4-hydroxybenzyl chloride, tertiary amine is added first during the condensation polymerization. According to the preparation method, the molecular weight and the molecular weight distribution of PC can be controlled through the ratio of the added molecular weight regulator; the active reaction substance is added during the pre-polymerization, and thus a polymer containing quaternary ...

Preparation and application of N-(2,3-dihydro-2,4-dimethylbenzofuran-5-acyl)-N'-tert-butyl-N'-(substituted benzoyl)hydrazine insecticide

Method of synthesizing furan phenol by gas phase catalysis

The invention discloses a method of continuously gas-phase synthesizing furan phenol in a tubular reactor by taking pyrocatechol and 2-methyl allyl alcohol as raw materials and taking a nitrogen gas as a carrier gas in the presence of an AlPO4-5 molecular sieve catalyst. Reaction liquid is rectified to obtain furan phenol with mass percentage content being greater than 99%, wherein the yield is 59-62% based on pyrocatechol. The method is simple in step and convenient to operate, generates few dual-etherification byproducts, belongs to one-step continuous synthesis, and can avoid a complex operation process of the conventional two-step batch process; in the synthesis process, no organic solvent is used and no waste slat is generated, and therefore the three wastes are reduced and the after-treatment is relatively simple. The unit operation and equipment investment is less, so that the cost is saved, and the synthesis yield and the purity of the product are high.

Preparation and application of N-(2,3-dihydro-2,4-dimethylbenzofuran-5-acyl)-N'-tert-butyl-N'-(substituted benzoyl)hydrazine insecticide

The invention relates to the preparation of diacylhydrazine compounds as pesticide and the application that the diacylhydrazine compounds are used for controlling pests. The structure general formula of the compounds of the invention is demonstrated in the figure and R represents substituted aryl in the formula. The invention synthesizes five diacylhydrazine pesticides with benzofuran heterocyclic novel structure, the same as the formula; compared with domestic and foreign patents, the difference of the invention is that the structure of the benzofuran heterocycle is changed to ensure that the novel compound obtained by the invention has drug effects of high efficiency, low toxicity, etc.

ALKYL-S-ALKYL HYDRAZONE COMPOUNDS WITH INSECTICIDE, FUNGICIDE, HERBICIDE ACTIVITIES AND THEIR PREPARATION

Preparation method of 3-(difluoromethyl)-1-methyl-1H-pyrazol-4-carboxylic acid

The invention discloses a preparation method of 3-(difluoromethyl)-1-methyl-1H-pyrazol-4-carboxylic acid. The reaction formula is shown in the specification. Difluoroacetic acid, which is relatively low in price and small in molar mass and is introduced at a post-synthesis phase is adopted, so that the preparation method of the 3-(difluoromethyl)-1-methyl-1H-pyrazol-4-carboxylic acid is low in cost, simple and safe in technological operation, high in product content, and high in product yield; the content is 98.1-98.9% (liquid chromatogram, external standard); the total yield is 52.2-56.9% (based on propargyl alcohol). Nanoscale titanium dioxide is adopted to carry out catalytic esterification, so that the reaction yield is high; the reaction time is short; the used raw materials and solvent are cheap and available; furthermore, an organic solvent is avoided in the four reaction steps, so that the solvent recovery cost and the environmental pollution risk are greatly reduced.

Method for purifying pyrimidine compounds

The invention discloses a method for purifying pyrimidine compounds which are represented by a formula (I) and have a purity of less than 94 percent. The method comprises the following steps of: firstly, dissolving compounds represented by the formula (I) in a mixed solvent of lower alcohol and water and stirring the mixture at the temperature of between 20 and 50 DEG C for 1 to 3 hours; secondly, cooling the solution for crystallization at the temperature of between 0 and 20 DEG C and filtering the solution after 1 to 3 hours; and finally, drying crystals to obtain the white pyrimidines witha purity of more than or equal to 98 percent. The method has the advantages of effectively removing impurities from the products, avoiding pollution to the environment, along with cheap and readily available solvent, high selectivity, large processing amount, simple process and convenient operation.

High-purity odorless pirimiphos-methyl preparation method

The invention discloses a high-purity odorless pirimiphos-methyl preparation method, comprising the following steps: adopting O,O-dimethylthiophosphorylchloride and 2-N,N-diethylamino-4-hydroxy-6-methyl- pyridine as raw materials and toluene, water as solvent and sodium hydroxide as acid-binding agent, adding a hydrolysis inhibitor and reacting in the present of catalyst to obtain the high-purityodorless of pirimiphos-methyl. The reaction equation is as above. In the method of the invention, the hydrolysis inhibitor is added so as to effectively inhibit O,O-dimethylthiophosphorylchloride from performing side reactions such as hydrolysis and the like, increase the conversion rate, reduce impurities and obtain the high-purity odorless pirimiphos-methyl. The toxic impurities are obviously reduced, the product yield and the purity are significantly improved and the industrialized problem of high-quality pirimiphos-methyl is solved.

Polycarbonate process wastewater treatment method

The invention discloses a polycarbonate process wastewater treatment method using a two-stage countercurrent continuous extraction system. The two-stage countercurrent continuous extraction system comprises a mixing kettle, a peristaltic pump, a centrifuge, an evaporator, a mixing kettle, a wastewater storage pot and a resin adsorption tower. A solvent used for synthesizing polycarbonate is used as an extractant, a feeding volume ratio of the extractant to wastewater is 0.08-0.1:1, and a feeding mass-to-volume ratio of resin to wastewater is 0.025:1. The resin used for adsorption is polystyrene resin. The method has the advantages of recycling of phenol substances in wastewater, less consumption of the extractant, low wastewater treatment cost and easy industrial amplification. The recovered phenol substances can be used for synthesizing polycarbonate, and treated brine can be directly discharged, or can be discharged to high salt environment, or can be used for the preparation of sodium ...

N, N'-disubstituted dihydrazides compound and its preparing process and application thereof

The present invention relates to N-5-chlorophenyl dihydropyran-6-formyl-N', N'-disubstituent dihydrazide compound and its preparation process, application and important intermediate preparing process. The compound has general expression as shown in I. The compound has excellent pesticidal activity, may be used widely in pest prevention and killing, and is one kind of pest growth regulator with wide application foreground.

2-amino-N-oxybenzamidecompounds with insecticidal activity

The invention discloses an o-anisidine N-oxyl benzamide compound which is shown in a formula (1) and has insecticidal activity, N-oxide, salts, all geometrical isomers and a preparation method thereof, wherein, R<1>, R<2>, R<3>, R<4>, R<5> and R<6> are limited as shown in an instruction book.

Method for preparing 2-bromo-3-ethylsulfonylpyridine

Preparation of 2-bromine-3-ethylsulfonyl-pyridine is carried out by taking mixture of acetic oxide and acetic acid as reactive solvent, reacting 1,1,3,3-tetramethoxy-propane with acetic oxide under zinc chloride catalyzing to generate p-cis-trans-isomer, condensing with ethylsulfonyl-methyl cyanide to generate (di-cis-4-trans)-2-ethylsulfonyl-5-methoxy-2, 4-pentadienoic nitrile, and reacting it with hydrogen bromide to obtain final product. It's accurate, simple and efficient, and it has gentle reactive condition, higher content and can be used for industrial production. It can be used as pyrimi-butyl critical intermediate of synthetic sulfonylurea super-efficient corn, tomato, and herbicide jade pyrsulfogentian.

Sulfurous unsaturated oximinoethers with bactericidal activity and preparing process thereof

The sulfurous unsaturated oximidoether compounds with bactericidal activity and their preparing process are disclosed.

Method for preparing ethylsulfonyl acetonitrile

Preparation of ethylsulfonyl-methyl cyanide is carried out by: taking acetic acid as reactive solvent, taking hydrogen peroxide as oxidant and oxidizing ethyl phenyl methyl cyanide into ethylsulfonyl-methyl cyanide. It's convenient, controllable and efficient. It has gentle reactive condition, higher content and can be used for industrial production. It can be used to produce super-efficient sulfonylurea herbicide jade pyrsulfogentian intermediate.

Preparation method of glufosinate-ammonium

The invention relates to a preparation method of glufosinate-ammonium. Specifically, the invention relates to a method for preparing glufosinate-ammonium represented by a formula (I) or a salt thereof, an enantiomer or a mixture of enantiomers in any proportion, which comprises the following steps of: reacting a compound represented by a formula (II) or a salt thereof, an enantiomer or a mixture of enantiomers in any proportion with an alcohol compound or a phenolic compound, and hydrolyzing the reaction product after separating by-products to obtain the compound of the formula (I). The byproduct is separated through a simple separation process, the recovery rate can reach 90% or above, and the obtained byproduct can be sold or recycled after being further purified, so that the cost of raw materials is greatly reduced, and the emission of three wastes is reduced. In addition, by-products can be separated and recycled before hydrolysis, so that the separation and purification difficulty ...

Preparation method of hydroxyl pyridine compound

The invention discloses a preparation method of a hydroxyl pyridine compound, which comprises the following steps of: taking hydrochloride or sulfate or nitrate of alkyl guanidine (shown in the formula II) as a reaction raw material; neutralizing with sodium hydroxide or potassium hydroxide; and then, taking toluene or xylene or chlorobenzene as a reaction solvent, and taking methanol or ethanol as a cosolvent for refluxing, dehydrating and dealcoholizing with alpha-alkyl acetoacetic ester (shown in the formula III) to react to obtain the hydroxyl pyridine compound (shown in the formula I). In the invention, by adding the methanol or ethanol as the cosolvent in the hydroxyl pyridine synthesis reaction, the solubility of the alkyl guanidine can be well increased, the decomposition of the reactants (alpha-alkyl acetoacetic ester and alkyl guanidine) is effectively controlled, the formation rate of the target product namely the hydroxyl pyridine compound shown in the general formula (I) is ...

High-purity odorless pirimiphos-methyl preparation method

The invention discloses a high-purity odorless pirimiphos-methyl preparation method, comprising the following steps: adopting O,O-dimethylthiophosphorylchloride and 2-N,N-diethylamino-4-hydroxy-6-methyl- pyridine as raw materials and toluene, water as solvent and sodium hydroxide as acid-binding agent, adding a hydrolysis inhibitor and reacting in the present of catalyst to obtain the high-purity odorless of pirimiphos-methyl. The reaction equation is as above. In the method of the invention, the hydrolysis inhibitor is added so as to effectively inhibit O,O-dimethylthiophosphorylchloride from performing side reactions such as hydrolysis and the like, increase the conversion rate, reduce impurities and obtain the high-purity odorless pirimiphos-methyl. The toxic impurities are obviously reduced, the product yield and the purity are significantly improved and the industrialized problem of high-quality pirimiphos-methyl is solved.

Preparation method of white thiophanate methyl

The invention discloses a preparation method of white thiophanate methyl, wherein diatomite is used as a decoloring agent, a color o-phenylenediamine industrial product is dissolved in an organic solvent, decolored by reflux and filtered to obtain a mixture of colorless o-phenylenediamine and the organic solvent, and the mixture is directly used in the synthesis of thiophanate methyl to obtain white tropine with whiteness of above 85 percent. The invention has less equipment investment, simple operation, low production cost, no three wastes and suitability for industrialized production.

Method for preparing 2-(3,4-dimethoxymethyl)-3-methylbutylnitrile

The invention discloses a method for preparing 2-(3,4-dimethoxymethyl)-3-methylbutylnitrile from a benzofuranol byproduct 4-(2-methallyl)-1,2-benzenediol serving as a raw material. A chemical reaction equation is shown in the specification. According to the method, the 2-(3,4-dimethoxymethyl)-3-methylbutylnitrile content is high, and the mass content is 98.5 to 99.5 percent; the product 2-(3,4-dimethoxymethyl)-3-methylbutylnitrile is high in yield, and the overall yield is 65.6 to 79.7 percent; the byproduct 4-(2-methallyl)-1,2-benzenediol produced in a benzofuranol production process is used as a starting raw material, so that the raw material is readily available, the method is low in cost and favorable for industrial production, and has environment-friendly benefits, and a process is simple.

具有杀菌活性的含硫不饱和肟醚类化合物及其制备方法

... 本发明公开了通式(I)所示的具有杀菌活性的含硫不饱和肟醚类化合物及其制备方法。通式(I)中A是氢，卤素，氰基，烷基，烷氧基，卤代烷基，卤代烷氧基；X是CH或N；Y是O，S，NR#-[6]；R#-[1]，R#-[6]是H或烷基；R#-[2]，R#-[3]，R#-[4]，及R#-[5]分别是氢，卤素，任意取代的烷基，任意取代的烷氧基，任意取代的烯基，任意取代的炔基，任意取代的芳基，任意取代的杂芳基。n是0，1或2。∴ ...

Arylpyrrole N-oxalate derivatives, and their preparation and use as pesticide

Method for purifying pyrimidine compounds

The invention discloses a method for purifying pyrimidine compounds which are represented by a formula (I) and have a purity of less than 94 percent. The method comprises the following steps of: firstly, dissolving compounds represented by the formula (I) in a mixed solvent of lower alcohol and water and stirring the mixture at the temperature of between 20 and 50 DEG C for 1 to 3 hours; secondly, cooling the solution for crystallization at the temperature of between 0 and 20 DEG C and filtering the solution after 1 to 3 hours; and finally, drying crystals to obtain the white pyrimidines with a purity of more than or equal to 98 percent. The method has the advantages of effectively removing impurities from the products, avoiding pollution to the environment, along with cheap and readily available solvent, high selectivity, large processing amount, simple process and convenient operation.

N-substituted aryloxy-oxalyl-N, N'-dihydrazide compounds and preparing process and application thereof

The invention relates to N-substituted aryloxy-oxalyl-N,N'-dihydrazide compounds preparing process and their use thereof, wherein the chemical structural formula of the compounds are shown in (I) disclosed in the specification, the compounds have good insecticidal activity.

Preparation method of glufosinate-ammonium

The invention relates to a preparation method of glufosinate-ammonium. Specifically, the invention relates to a method for preparing glufosinate-ammonium represented by a formula (I) or a salt thereof, an enantiomer or a mixture of enantiomers in any proportion, which comprises the following steps: reacting a compound of a formula (II) with a compound of a formula (III), and hydrolyzing the reaction product to obtain the compound of the formula (I). According to the method disclosed by the invention, the reaction activity of the substrate is higher, so that the construction condition of a P-C bond is milder, the reaction temperature is lower, and the racemization of an L-configuration at high temperature can be reduced, thereby improving the maintenance of the L-configuration during the preparation of the L-glufosinate-ammonium.

2-amino-N-oxybenzamidecompounds with insecticidal activity

The invention discloses an o-anisidine N-oxyl benzamide compound which is shown in a formula (1) and has insecticidal activity, N-oxide, salts, all geometrical isomers and a preparation method thereof, wherein, R<1>, R<2>, R<3>, R<4>, R<5> and R<6> are limited as shown in an instruction book.

Preparation method of glufosinate-ammonium

The invention relates to a preparation method of glufosinate-ammonium. Specifically, the invention relates to a method for preparing glufosinate-ammonium represented by a formula (I) or a salt thereof, an enantiomer or a mixture of enantiomers in any proportion, which comprises the following steps: hydrolyzing a compound of a formula (III) to obtain the compound of the formula (I). According to the method, due to different reaction mechanisms, halogenated hydrocarbon byproducts in the Michaelis-Arbuzov reaction can be avoided, the destructive effect of the halogenated hydrocarbon byproducts on ozone in the atmosphere is prevented, correspondingly, equipment and engineering investment for separation, purification, collection and the like of the byproducts are also omitted, and potential environment and safety risks caused by the byproducts are also avoided.

Method for preparing ethylsulfonyl acetonitrile

Methods of preparing glufosinate

Disclosed is a method of preparing glufosinate, and specifically a method of preparing glufosinate represented by formula (I) or its salt or enantiomer, or a mixture of its enantiomers in any ratio, comprising a step of hydrolyzing a compound of formula (III) to generate a compound of formula (I). Due to a distinctive reaction mechanism adopted in the method of the present disclosure, a halogenated hydrocarbon by product in the Michaelis-Arbuzov reaction can be avoided and thus the destructive impact of the halogenated hydrocarbon by-product on ozone in the aerosphere can be prevented. Accordingly, the equipment and engineering investments required for the separation, purification, and collection of the foregoing by-product are eliminated, and the potential environmental and safety hazards brought by the foregoing by-product are also avoided. 0 0X1 0 R1 +1 P, OH I Y OH 2 PH NH2 R (1) (111)

Methods of preparing glufosinate

Disclosed is a method of preparing glufosinate, and specifically a method of preparing glufosinate represented by formula (I) or its salt or enantiomer, or a mixture of its enantiomers in any ratio, comprising a step of hydrolyzing a compound of formula (III) to generate a compound of formula (I). Due to a distinctive reaction mechanism adopted in the method of the present disclosure, a halogenated hydrocarbon by product in the Michaelis-Arbuzov reaction can be avoided and thus the destructive impact of the halogenated hydrocarbon by-product on ozone in the aerosphere can be prevented. Accordingly, the equipment and engineering investments required for the separation, purification, and collection of the foregoing by-product are eliminated, and the potential environmental and safety hazards brought by the foregoing by-product are also avoided. 0 0X1 0 R1 +1 P, OH I Y OH 2 PH NH2 R (1) (111)

Methods of preparing glufosinate

Disclosed is a method of preparing glufosinate, and specifically a method of preparing glufosinate represented by formula (1) or its salt or enantiomer, or a mixture of its enantiomers in any ratio, comprising a step of hydrolyzing a compound of formula (III) to generate a compound of formula (1). Due to a distinctive reaction mechanism adopted in the method of the present disclosure, a halogenated hydrocarbon by-product in the Michaelis-Arbuzov reaction can be avoided and thus the destructive impact of the halogenated hydrocarbon by-product on ozone in the aerosphere can be prevented. Accordingly, the equipment and engineering investments required for the separation, purification, and collection of the foregoing by-product are eliminated, and the potential environmental and safety hazards brought by the foregoing by-product are also avoided.

Métodos de preparación de glufosinato.

Se describe un método para preparar glufosinato, y específicamente un método para preparar glufosinato representado por la fórmula (I) o su sal o enantiómero, o una mezcla de sus enantiómeros en cualquier proporción, que comprende un paso de hidrolizar un compuesto de fórmula (III) para generar un compuesto de fórmula (I). Debido a un mecanismo de reacción distintivo adoptado en el método de la presente descripción, se puede evitar un subproducto de hidrocarburo halogenado en la reacción de Michaelis-Arbuzov y, por lo tanto, se puede prevenir el impacto destructivo del subproducto de hidrocarburo halogenado sobre el ozono en la aerosfera. En consecuencia, se eliminan las inversiones en equipo e ingeniería requeridas para la separación, purificación y recolección del subproducto anterior, y también se evitan los peligros ambientales y de seguridad potenciales provocados por el subproducto anterior.

Métodos de preparo de glufosinato

métodos de preparo de glufosinato. é descrito um método de preparo de glufosinato, e especificamente um método de preparo de glufosinato representado pela fórmula (i) ou seu sal ou enantiômero, ou uma mistura de seus enantiômeros em qualquer razão, que compreende uma etapa de hidrolisar um composto de fórmula (iii) para gerar um composto de fórmula (i). devido a um mecanismo de reação distintivo adotado no método da presente descrição, um subproduto de hidrocarboneto halogenado na reação de michaelis-arbuzov pode ser evitado e, desse modo, o impacto destrutivo do subproduto de hidrocarboneto halogenado em ozônio na aerosfera pode ser prevenido. consequentemente, o equipamento e os investimentos de engenharia necessários para a separação, purificação e coleta do subproduto precedente são eliminados, e os perigos ambientais potenciais e de segurança trazidos pelo subproduto precedente são também evitados.

Composes d'alkyle-s-alkyle hydrazone a activites insecticides, fongicides et herbicides et leur preparation

Methods of preparing glufosinate

Disclosed is a method of preparing glufosinate, and specifically a method of preparing glufosinate represented by formula (I) or its salt or enantiomer, or a mixture of its enantiomers in any ratio, comprising a step of hydrolyzing a compound of formula (III) to generate a compound of formula (I). Due to a distinctive reaction mechanism adopted in the method of the present disclosure, a halogenated hydrocarbon by-product in the Michaelis-Arbuzov reaction can be avoided and thus the destructive impact of the halogenated hydrocarbon by-product on ozone in the aerosphere can be prevented. Accordingly, the equipment and engineering investments required for the separation, purification, and collection of the foregoing by-product are eliminated, and the potential environmental and safety hazards brought by the foregoing by-product are also avoided.

Methods of preparing glufosinate

Disclosed is a method of preparing glufosinate, and specifically a method of preparing glufosinate represented by formula (I) or its salt or enantiomer, or a mixture of its enantiomers in any ratio, comprising a step of hydrolyzing a compound of formula (III) to generate a compound of formula (I). Due to a distinctive reaction mechanism adopted in the method of the present disclosure, a halogenated hydrocarbon by-product in the Michaelis-Arbuzov reaction can be avoided and thus the destructive impact of the halogenated hydrocarbon by-product on ozone in the aerosphere can be prevented. Accordingly, the equipment and engineering investments required for the separation, purification, and collection of the foregoing by-product are eliminated, and the potential environmental and safety hazards brought by the foregoing by-product are also avoided.

Method for preparing glufosinate

Metodos de preparacion de glufosinato.

Se describe un método para preparar glufosinato, y específicamente un método para preparar glufosinato representado por la fórmula (I) o su sal o enantiómero, o una mezcla de sus enantiómeros en cualquier proporción, que comprende un paso de hidrolizar un compuesto de fórmula (III) para generar un compuesto de fórmula (I). Debido a un mecanismo de reacción distintivo adoptado en el método de la presente descripción, se puede evitar un subproducto de hidrocarburo halogenado en la reacción de Michaelis-Arbuzov y, por lo tanto, se puede prevenir el impacto destructivo del subproducto de hidrocarburo halogenado sobre el ozono en la aerosfera. En consecuencia, se eliminan las inversiones en equipo e ingeniería requeridas para la separación, purificación y recolección del subproducto anterior, y también se evitan los peligros ambientales y de seguridad potenciales provocados por el subproducto anterior.

Composes d'oxime-ether contenant du soufre insature, a action fongicide, et leur preparation

Métodos de preparo de glufosinato

MÉTODOS DE PREPARO DE GLUFOSINATO. É descrito um método de preparo de glufosinato, e especificamente um método de preparo de glufosinato representado pela fórmula (I) ou seu sal ou enantiômero, ou uma mistura de seus enantiômeros em qualquer razão, que compreende uma etapa de hidrolisar um composto de fórmula (III) para gerar um composto de fórmula (I). Devido a um mecanismo de reação distintivo adotado no método da presente descrição, um subproduto de hidrocarboneto halogenado na reação de Michaelis-Arbuzov pode ser evitado e, desse modo, o impacto destrutivo do subproduto de hidrocarboneto halogenado em ozônio na aerosfera pode ser prevenido. Consequentemente, o equipamento e os investimentos de engenharia necessários para a separação, purificação e coleta do subproduto precedente são eliminados, e os perigos ambientais potenciais e de segurança trazidos pelo subproduto precedente são também evitados.

Métodos de preparación de glufosinato

Un método para preparar glufosinato, y específicamente un método para preparar glufosinato representado por la fórmula (1) o su sal o enantiómero, o una mezcla de sus enantiómeros en cualquier proporción, que comprende un paso de hidrolizar un compuesto de fórmula (3) para generar un compuesto de fórmula (1). Debido a un mecanismo de reacción distintivo adoptado en el método de la presente descripción, se puede evitar un subproducto de hidrocarburo halogenado en la reacción de Michaelis-Arbuzov y, por lo tanto, se puede prevenir el impacto destructivo del subproducto de hidrocarburo halogenado sobre el ozono en la aerosfera. En consecuencia, se eliminan las inversiones en equipo e ingeniería requeridas para la separación, purificación y recolección del subproducto anterior, y también se evitan los peligros ambientales y de seguridad potenciales provocados por el subproducto anterior. Reivindicación 1: Un método para preparar glufosinato representado por la fórmula (1) o su sal o enantiómero, o una mezcla de sus enantiómeros en cualquier proporción, caracterizado porque comprende: hidrolizar un compuesto de fórmula (3) para generar un compuesto de fórmula (1); en donde: X¹ es halógeno; Y es -OR³ o -N(R⁴)(R⁵); R¹ y R² se seleccionan cada uno independientemente de hidrógeno, un grupo alquilo C₁-C₆, un grupo alquenilo C₂-C₆, un grupo alquinilo C₂-C₆, un grupo cicloalquilo C₃-C₆, un grupo heterocicloalquilo de tres a seis miembros, un grupo arilo C₆-C₁₀, o un grupo heteroarilo de cinco a diez miembros, o R¹ y R² forman un grupo heterocicloalquilo de tres a seis miembros junto con el átomo de N al que están unidos, en donde el alquilo C₁-C₆, el grupo alquenilo C₂-C₆, el grupo alquinilo C₂-C₆, el grupo cicloalquilo C₃-C₆, el grupo heterocicloalquilo de tres a seis miembros, el grupo arilo C₆-C₁₀ o el grupo heteroarilo de cinco a diez miembros está opcionalmente sustituido con halógeno, un grupo carboxilo, un grupo hidroxilo, un grupo ciano, un grupo amino, un grupo nitro, ...