12 results about "Methyl butyrate" patented technology

The application relates to a method for continuously preparing imidacloprid intermediate 3-methyl-2-(4-morpholinyl)cyclobutyl acid methyl ester, and the specific steps are as follows: raw material morpholinyl propylene and methyl acrylate are respectively introduced into a preheater, then the preheated raw materials are pumped into a micro-channel reactor for reaction, after the reaction is completed, the materials are discharged from the micro-channel reactor outlet into a reaction kettle, reaction is carried out, then the cyclization liquid obtained in the reaction kettle is subjected to light removal in a light removal tower, 3-methyl-2-(4-morpholinyl)cyclobutyl acid methyl ester after light removal is collected from the tower kettle of the light removal tower, the 3-methyl-2-(4-morpholinyl)cyclobutyl acid methyl ester is introduced into a pentyl ester synthesis process, and the recovered methyl acrylate collected from the top of the light removal tower is reused in the reaction kettle to participate in the ripening reaction. The application has the advantages of high product purity, low raw material unit consumption, good safety, low labor cost and the like.

The invention discloses a fluorescent probe for recognizing lithium ions and a preparation method and application thereof.The method comprises the steps that rhodamine B, HATU and methyl 3-amino-3-methyl-1-butyrate are mixed and subjected to a first-step reaction, a first reactant is obtained, the first reactant, ethyl alcohol and sodium hydroxide are mixed and subjected to a second-step reaction, a second reactant is obtained and subjected to a third-step reaction, and the fluorescent probe for recognizing the lithium ions is obtained. And mixing the second reactant, crown ether, EDCI and HOBT, and carrying out a third-step reaction to obtain the fluorescent probe. According to the method, lithium ions in a complex environment can be efficiently recognized, and raw material waste and resource loss in the production process are avoided.

The invention discloses a drinkable composite composition for deeply nourishing facial tissues and a preparation method of the drinkable composite composition, and relates to the field of drinks, in particular to a collagen peptide drink. 30 mL of the beverage contains the following components in parts by mass: 2.5 to 6 g of collagen peptide, 6.9 to 10.4 g of collagen tripeptide liquid, 0.001 to 0.5 g of glycosaminoglycan, 3 to 5 g of composite concentrated fruit juice, 0.1 to 1 g of calcium beta-hydroxy-beta-methyl butyrate (CaHMB), 0.003 to 0.03 g of an antioxidant and 0.01 to 0.05 g of an acidity regulator. According to the collagen peptide composite beverage provided by the invention, the functional collagen peptide and the collagen tripeptide are added, and the functional peptide has a relatively good supplement effect on corium layer collagen, so that the collagen peptide composite beverage has a good improvement effect on skin elasticity; glycosaminoglycan has a good effect on moisture absorption of a corium layer, so that the moisture content of skin is increased, and by adding calcium beta-hydroxy-beta-methylbutyrate (CaHMB), the effect of promoting synthesis of muscles is achieved, so that the muscle mass of the face is increased, and the compactness of the face is maintained.

The invention discloses durian essence and a preparation method thereof, and the durian essence is prepared from the following raw materials: 2.0 to 3.8 percent of methyl 2-methylbutyrate, 1.6 to 3.4 percent of ethyl 2-methylbutyrate, 0.8 to 1.6 percent of 3-mercaptohexyl acetate, 0.4 to 1.2 percent of dipropyl disulfide, 0.01 to 0.1 percent of 4-mercapto-4-methyl-2-pentanone, 0.8 to 2.0 percent of citral, 1.5 to 3.0 percent of hops tincture, 1.0 to 2.2 percent of 2, 6-dimethyl-5-heptenal and 80.0 to 88.0 percent of solvent. According to the durian essence, a certain amount of acetic acid 3-mercaptohexyl ester and citral are added into common durian essence components such as methyl 2-methylbutyrate and dipropyl disulfide, and on the basis that the storage stability of the durian essence is guaranteed, the pure and full aroma profile of durian can be highly restored.

The present invention relates to compounds of Formula (I) or an agronomically acceptable stereoisomers and / or salt of said compounds wherein Q, X, Y, Z, R1, R5, R6 and n are as defined herein. The invention further relates to herbicidal compositions which comprise a compound of Formula (I) and to the use of compounds of Formula (I) for controlling weeds, in particular in crops of useful plants.

The application relates to the technical field of edible essence. The application discloses a yogurt essence and a preparation method thereof. The raw material composition of the yogurt essence comprises ethyl maltol, vanillin, butanedione, acetic acid, ethyl acetate, propionic acid, 2,3-pentanedione, 3-hydroxy-2-butanone, butyric acid, ethyl butyrate, isoamyl acetate, methyl thio butyrate, hexanoic acid, ethyl hexanoate, 10% furanone, isoamyl butyrate, ethyl levulinate, linalool, p-cymene, 4-terpinenol, nerol, citral, geraniol, neryl acetate, geranyl acetate, D-limonene, lemon oil, distilled white lemon oil, sweet orange oil, glycerol triacetate, rosemary extract and bitter gourd extract. The yogurt essence prepared by the application has a flavor closer to real yogurt, good thermal stability and good flavor persistence.

The application discloses a preparation method of indobufen, and belongs to the technical field of drug synthesis process, wherein the preparation method is as follows: dissolving ortho-carboxyl benzamide in an organic solvent, cooling to 2-8 DEG C, adding a reducing agent, and carrying out incubation reaction, post-treatment, and obtaining compound I; mixing the organic solvent, a catalyst and the compound I, carrying out reflux water separation reaction, post-treatment, and obtaining compound II; dissolving the compound II in an organic solvent, adding an alkaline reagent, heating to 40-50 DEG C, dropwise adding 2-(4-bromophenyl) butyric acid methyl ester, then carrying out reflux reaction, post-treatment, and obtaining compound III; dissolving the compound III in an organic solvent, adjusting the pH to 10.5-11.5, stirring and reacting at 40-50 DEG C, post-treatment, and obtaining indobufen. The preparation method improves the safety of preparation, and also improves the quality and yield of the product indobufen.

This invention belongs to the field of chemical intermediate preparation technology, and particularly relates to a method for recovering N-hydroxymethyl phthalimide from the residue of a key intermediate of 4-AA. The method includes the following steps: (1) Distillation: The toluene mother liquor produced from the preparation of methyl 2-(N-phthaliminomethyl)-3-oxobutyrate, a key intermediate of 4-AA, is filtered and distilled to obtain toluene solvent and concentrated residue. The toluene solvent is recovered and reused. (2) Hydrolysis: A hydrolysis reagent is added to the concentrated residue, with a weight ratio of concentrated residue to hydrolysis reagent of 1:(1.1-4). The mixture is heated to 30-100℃ and kept at this temperature for 1-10 hours with stirring to obtain a hydrolysis product. (3) Recovery: The hydrolysis product is cooled, crystallized, filtered, and washed with water to obtain N-hydroxymethyl phthalimide. This invention can recover effective components from hazardous waste, thereby reducing the discharge of hazardous waste and lowering the cost of hazardous waste treatment.

The present invention relates to a composition containing methyl methacrylate. The present invention provides a molded body having excellent heat resistance. A composition containing methyl methacrylate, methyl isobutyrate, and methyl acrylate, wherein the content of methyl methacrylate is 99.5 mass% or more, the concentration of methyl isobutyrate is 20 mass ppm to 300 mass ppm, and the concentration of methyl acrylate is 5 mass ppm to 200 mass ppm.

The utility model relates to the technical field of experimental apparatus, in particular to a kind of 2-bromoisobutyric acid methyl ester preparation condensation reflux device, and it is completed to the condensation reflux processing of 2-bromoisobutyric acid methyl ester by condensing device, detachable support is provided to condensing device by supporting device, support and condensing device fixed connection, reduce the situation that condensing device itself appears during operation Process shaking, through sealing device, the cleaning of equipment is facilitated, the practicability of device is improved;Including condensing device, supporting device and sealing device, supporting device is installed on condensing device, sealing device is installed on condensing device.

The application belongs to the technical field of medicine synthesis, and particularly relates to a preparation method of Mupiravir. The method adopts a one-pot method to prepare an intermediate of Mupiravir ((3AR, 4R, 6R, 6AR)-6-(4-(hydroxyamino)-2-oxymethyl)-2,2-dimethyltetrahydrofuran[3,4-D][1,3]dioxol-4-yl) isobutyric acid methyl ester (compound 1), and then Mupiravir is obtained. The method has the advantages of simple operation, simplified reaction post-processing steps, reduced use of solvent types, low raw material cost and production cost, small amount of mother liquor, green and environment-friendly production, and is more suitable for industrial large-scale production. The liquid phase purity of the obtained Mupiravir reaches more than 99.9%, and the yield reaches 78.9%.

The application discloses a lemon essence, a preparation method and application thereof, and belongs to the field of essence preparation. The lemon essence comprises the following raw materials: lemon fruit fragrance 10-15%, green fragrance 1-2%, sweet agent 1-3%, enhancer 5-10%, stabilizer 1-3%, and the rest is an alcohol solvent. The lemon fruit fragrance comprises lemon oil, sweet orange oil and D-limonene; the green fragrance comprises orange flower alcohol, leaf alcohol, linalool, oxidized linalool, alpha-terpineol, beta-terpinene, isopinocamphone and lemon aldehyde; the sweet agent comprises ethyl maltol and vanillin propylene glycol acetal; the enhancer comprises ethyl butyrate, ethyl 2-methyl butyrate, ethyl acetoacetate, leaf alcohol acetate, linalyl acetate and geranyl acetate; and the stabilizer comprises a low-carboxylic acid, a heat-resistant agent and an antioxidant. The application can inhibit the oxidation and thermal decomposition of the easily-oxidized components from the molecular level by synergistically compounding the components, significantly improves the aroma stability of the essence under long-term storage and high-temperature processing conditions, and can be widely applied in the fields of beverages, foods and the like.