141 results about "Acetate compound" patented technology

The invention discloses extracting agent solution for extracting titanium and/or iron from titanium and iron-contained multi-metal chloride acid solution and an extracting method. The extracting agentsolution consists of an extracting agent and diluent; the extracting agent is one or more of quaternary ammonium salt R4NX, N-alkylamide, N, N-dialkylamide and diethanolamide; and the diluent is oneor more of oleyl alcohol, oleyl alcohol derivatives, alkane alcohol and acetate compounds in a normal state at normal temperature. The extracting agent solution achieves high titanium and iron extracting capacity, quick balance, excellent selectivity, easy reverse extraction, excellent separation, economy and environmental protection.

An electrolyte of Li ion cell is prepared from non-aqueous organic solvent, Li salt and prolyl acetate compound. The propyl acetate compound used as cosolvent of electrolyte has low melting point and low viscosity so that low temperature performance of Li ion cell can be effectively improved.

The invention provides a detection method of glucose related substances in an acetate compound electrolyte injection, related to the technical field of medicine. The detection method of glucose related substances in the acetate compound electrolyte injection comprises the following steps: preparing a system suitability solution: weighing a sodium acetate reference substance, a glucose reference substance and a glucose degradation product reference substance, placing in a 10ml volumetric flask, diluting to a mark with water, shaking well, and taking as the system suitability solution; preparinga test substance and a self reference solution: taking the sample directly for the test substance solution; measuring and taking the test substance solution, placing in a 50ml volumetric flask, diluting to the mark with water, shaking well as a contrast solution A; taking a portion of the contrast solution A, placing in a 100ml volumetric flask, diluting to the mark with water, and shaking well as a contrast solution B; and chromatographic conditions are as follows: Waters Sugar Park I column, 300mm x 6.5mm, 10[Mu]m; mobile phase, 50 mg/L aqueous solution of calcium ethylenediaminetetraacetate; flow rate, 0.3 ml/min; column temperature, 85+/-5 degrees centigrade; differential detector set temperature, 40+/-5 degrees centigrade; and injection volume, 20[Mu]l. The detection method of glucose related substances in the acetate compound electrolyte injection has the beneficial effects of effectively separating the acetate and the glucose degradation products, optimizing the process and improving the product quality and safety.

The invention provides a catalyst component for olefin polymerization. The catalyst component is a reaction product of a magnesium compound, an organic acid anhydride compound, an acetate compound, an aromatic ester compound and a titanium-containing compound. The invention also provides a preparation method for the catalyst component. The invention further provides a catalyst including the catalyst component. The catalyst has high hydrogen regulation sensitivity; and when the catalyst is applied to olefin polymerization, an obtained polymer powder has spherical/spheroidic particles and high bulk density.

The invention discloses a preparation method of a medicine intermediate butanone diacid diester compound. The butanone diacid diester compound is obtained by treating a furan compound as a solvent, an oxalic acid diester compound and an acetate compound as raw materials, and an organic alkali as a catalyst, reacting for 1-6h under low temperature conditions, heat-reacting for 1-8h, and processing. Detection results show that the purity of the butanone diacid diester compound is equal to or greater than 95%, and the yield of the butanone diacid diester compound is 50-90%. The preparation method of the invention, which has the advantages of mild reaction mild, small toxicity and easy recycle of the solvent, cheap and easily available catalyst, simple post-processing, less waste gas, waste water and water residue, and high yield, is suitable for the industrialization production.

The invention discloses a method for preparing a palladium acetate compound, which comprises the following steps of: dissolving and reducing palladium sponge into floating active sponge palladium black; refluxing and completely reacting the active sponge palladium black with glacial acetic acid on the premise of not adding any aid; and concentrating, crystallizing and drying to prepare red-brown palladium acetate crystals. The key technology of the method is that: a foaming agent is added into a chloropalladite reduction system for reducing palladium ions into the floating active sponge palladium black, and the problem that the reaction between the active sponge palladium black and the glacial acetic acid is slow and incomplete is effectively solved on the premise of not adding any aid into a reaction system of the active sponge palladium black and the glacial acetic acid. The method for preparing the palladium acetate compound has the advantages of short reaction time, easy control, high stability, repeated use of glacial acetic acid, high product purity, yield of over 99 percent, and capacity of overcoming the defect of using nitric acid as an aid in the prior art.

The invention discloses a preparation method of a zirconium-oxide/carbon composite fiber modified epoxy coating. The preparation method comprises the following steps of: (1) preparation of zirconium-oxide/carbon fiber: stirring mixed solution of 15g of zirconium acetate solution, 2mL of N,N-dimethyl formamide (DMF) and 2mL of absolute ethyl alcohol for 2 hours, then adding 0.7g of polyvinylpyrrolidone (PVP) powder, then continuously stirring for 12 hours at temperature of 25 DEG C, and obtaining precursor solution of a PVP/zirconium acetate compound; then adopting an electrostatic-spinning method to prepare nanowires with uniform size and zirconium-oxide dispersion, and finally calcining the nanowires under the protection of argon atmosphere to prepare ZrO2-CNF composite fiber; (2) preparation of modified zirconium-oxide/carbon fiber (ZrO2-CNF); (3) adding the prepared modified zirconium-oxide/carbon fiber into an epoxy coating. The preparation method disclosed by the invention has thebeneficial effect that the mechanical property and the corrosion resistance of the epoxy coating are effectively enhanced.

The invention discloses a preparation method of 16alpha-hydroxyprednisolone. The method comprises the following steps: dissolving a 16,17,21-trihydroxypregn-1,4,9(11)-triene-3,20-dione-21-acetate compound I and a halogenating reagent into N,N-dimethylformamide, adding HClO4 to form a 11,16,17,21-tetrahydroxypregn-1,4-diene-9-bromo(chloro/iodo)-3,20-dione-11-formate-21-acetate compound 11; adding adehalogenation reagent and a hydrogen donor to remove a 9-position halogen; and finally adding an alkaline liquid, performing a hydrolysis reaction, and adding an acid for neutralization to obtain the 16alpha-hydroxyprednisolone. The method provided by the invention achieves remarkable effects, has the advantages of fewer reaction steps, a high conversion rate, less impurities, low costs and simple operation, is suitable for industrialized production, and has greater application value.

The invention provides a catalyst component used for an ethylene polymerization reaction. The catalyst comprises the following reactants: 1, a magnesium compound; 2, an organophosphorus compound; 3, an organic epoxy compound; 4, a precipitation assistant; 5, a polar polymer; 6, an acetate compound; and 7, a titanium compound. Polyethylene powder particles obtained through polymerizing ethylene in the presence of the catalyst under ethylene slurry polymerization conditions (the hydrogen pressure is 2.8*10<5>Pa, the ethylene pressure is 7.5*10<5>Pa, the polymerization temperature is 85DEG C, and the polymerization time is 2h) have the following special physical structures: 1, every polyethylene powder particle is composed of several to dozens of small polyethylene spheres with the particle size being greater than 50[mu]m, and fusion among the small polyethylene spheres is good; and 2, the surface of every small polyethylene sphere is relatively smooth, and 1-10[mu]m polyethylene primary particles cannot be observed.

A 3,3'-diindolyl acetate compound and a derivative thereof are discovered to have extensive activities of immunity resistance, inflammation resistance, edema inhibition and the like. Meanwhile, The 3,3'-diindolyl acetate compound is also an important intermediate raw material which belongs to the field of organic preparation. The compound can be used for synthesizing multiple bioactive molecules with 3,3'-bis-indolymethane structure, and has quite high organic synthesis application value. The invention provides a quite simple preparation method of a visible light catalyzed 3,3'-diindolyl acetate compound. The preparation method comprises the following specific steps: taking a glycine derivative and an indole derivative as raw materials, taking an organic photosensitizer (eosin Y, rose-bengal or rhodamine 6G) as a photocatalyst, reacting for 10-30 h at the room temperature under illumination of visible light, and separating and purifying to obtain a product. Compared with the prior art,the preparation method has the advantages of simple steps, high yield, cheap and easily obtained raw materials and catalysts, zero metal, mild reaction condition, simplicity in reaction operation andthe like, and is more suitable for pilot scale-up and large-scale preparation of the 3,3'-diindolyl acetate compound.

The invention discloses a method for synthesizing a 2-methylpyridine compound and belongs to the technical field of organic synthesis. According to key points of the technical scheme, the method for synthesizing the 2-methylpyridine compound in the invention comprises the following specific steps: dissolving triethylamine and oxime acetate compounds into a solvent, adding a catalyst, and reactingin an oxygen atmosphere at a temperature of 120 to 160 DEG C, thereby obtaining the 2-methylpyridine compound. The synthetic process is simple and efficient, and the 2-methylpyridine compound is directly prepared in one step by virtue of a one-pot cascade reaction without transition metal catalysis, so that waste of resources and environmental pollution caused by usage of multiple reagents in multi-step reactions and purification of an intermediate in each reaction step and the like can be avoided, the reaction conditions are mild, and the substrate application range is wide. Meanwhile, by taking the triethylamine as the raw material, the production cost is greatly reduced.

The invention relates to mulin acetate comprising substituted squaric acid, and an application thereof. The invention belongs to the field of chemical medicine. A mulin acetate compound comprising substituted squaric acid, a pharmaceutically acceptable salt thereof, a solvate thereof, an isomer thereof, a prodrug thereof, or a prodrug of salt thereof have a structural general formula represented by the formula (I). The MIC values of the compound against staphylococcus aureus and strepococcus equi are higher by 20-30 times than the antibacterial effect of a reference product of tiamulin in market. The mulin acetate comprising substituted squaric acid is a high-efficiency antibacterial medicine.

The invention relates to a preparation method of a progestin-1,4-double bond-11-one-21-acetate compound. By utilizing the preparation method, the compound with the basic structure of progestin-1,4-double bond-11-one-21-acetate can be prepared in a high yield manner according to a following reaction route through regulating biodehydrogenation reaction and a 11-site hydroxyl oxydone radical.

The invention provides a preparation method of a pregabalin chiral intermediate. The pregabalin chiral intermediate is (S)-4-isobutyl-dihydro-3H-furan-2-one. The preparation method comprises following steps: S1, a chiral hydroxyl compound 3 is obtained from an S-epoxypropane compound 2 via ring-opening reaction under Grignard reagent conditions; S2, sulfonylation protection of hydroxy groups in the chiral hydroxyl compound 3 is carried out so as to obtain a compound 4 with chiral leaving groups; and S3, the compound 4 and an acetate compound or malonic ester are subjected to substitution reaction, and a compound 1 is obtained via hydrolysis, decarboxylation, and ring closing reaction under acidic conditions. The raw materials used in preparation of the pregabalin chiral intermediate are cheap and easily available; reaction route is short; operation is simple; reaction process is safe and is friendly to the environment; the entire yield is high; the preparation method is convenient for large scale production; and an economical feasible route is provided for production of high purity pregabalin.

The invention belongs to the technical field of organic synthesizing and provides novel 4-allyl acetate substituted N-sulfonyl 1,2,3-triazole and a preparation method thereof. The preparation method includes: in an inert solvent and under the action of a thiophene-2-copper formate catalyst, catalyzing (E)-1-aryl-1,4-eneyne-3-acetate compounds and sulfonyl azide to prepare the 4-allyl acetate substituted N-sulfonyl 1,2,3-triazole. The preparation method has the advantages that the method is mild in reaction condition, green, high in reaction efficiency and capable of satisfying large-scale production requirements, product yield is not lower than 70%, and the prepared 4-allyl acetate substituted N-sulfonyl 1,2,3-triazole has potent physiological activity.

Provided is a sustained releaser of a sex pheromone having a high release rate, especially preferably of a sex pheromone of an aliphatic acetate compound having 10 to 16 carbon atoms, wherein the release of the sex pheromone is controlled so that it can be released at a constant rate over a control period of a pest insect. More specifically, provided is a sustained pheromone releaser comprising a polymer container and having, enclosed therein, a mixture having a melting point of 15 to 35° C. and being obtained by mixing a sex pheromone substance and a compound having a melting point of 10 to 40° C.