22 results about "Methyl pentanoate" patented technology

To provide a composition capable of controlling thermal decomposability of molded articles, and polymers, cured products, and molded articles obtained using this composition, and a method for producing polymethyl methacrylate.SOLUTION: Provided is a composition containing methyl methacrylate, methyl pivalate, and methyl isobutyrate, wherein the concentration of methyl pivalate is more than 0 mass ppm and 50000 mass ppm or less in the composition, and the concentration of methyl isobutyrate is more than 0 mass ppm and 2000 mass ppm or less in the composition. Provided are a polymer, a cured product, and a molded article obtained by employing the composition, and a method for producing polymethyl methacrylate by polymerizing methyl methacrylate in the composition.SELECTED DRAWING: None

The invention belongs to the technical field of organic synthetic chemistry, and discloses a method for efficiently synthesizing methyl 2-chloro-3-oxovalerate. According to the method, high-selectivity chlorination is performed on a beta-site C-H bond of methyl 3-oxovalerate under a mild condition by taking sodium chloride as a chlorine source and adopting a dual-catalysis system consisting of engineered halogenase and a visible light-sensitive catalyst under visible light irradiation. The engineered halogenase is a HalB triple mutant, and the affinity and regioselectivity of a substrate are remarkably improved; the photosensitive catalyst is a ruthenium bipyridine complex and synergistically drives generation of chlorine free radicals. According to the invention, a brand new biological-photochemical synergistic catalysis platform is constructed by organically combining the substrate recognition capability of the engineered halogenase and an electron transfer mechanism driven by visible light catalysis, so that the contradiction among selectivity, mildness and atomic efficiency of a traditional chlorination method is solved; and the method can be expanded to precise synthesis of other beta-functionalized ketone ester compounds.

The present invention addresses the problem of providing: a composition from which molded objects having excellent durability are obtained; a polymer, a cured object, and a molded object which are obtained using this composition; and a method for producing poly(methyl methacrylate) using this composition.　This composition comprises methyl methacrylate and methyl pivalate and has a methyl pivalate concentration higher than 0 mass ppm but not higher than 10,000 mass ppm with respect to the whole composition.

This invention relates to a novel method for preparing ruxolitinib phosphate. Methyl 4-(1-(2-cyano-1-cyclopentylethyl)-1H-pyrazol-4-yl)-7H-pyrrolo[2,3-D]pyrimidin-7-yl)terpentanoate (compound X) is deprotected under alkaline conditions, then directly resolved without separation, alkalized to release the free ruxolitinib, and salted to obtain the ruxolitinib phosphate. The obtained ruxolitinib phosphate has an HPLC purity >99.90%, and the ruxolitinib phosphate isomer has a purity >99.50%. The preparation method of this invention has the advantages of simple operation, controllable impurities, low cost, and suitability for industrial production.

The present invention relates to a method for (masking or) making it difficult to sense the odor of sotolon without affecting the taste (flavor) of food and beverages, and to a flavoring composition that can be suitably used to mask the deterioration odor of food and beverages. The present invention can suppress the odor of sotolon without impairing the taste of a product by using, at specific concentrations in food and beverages, β-caryophyllene oxide, ethyl acetoacetate, methyl isovalerate, ethyl valerate, triethyl citrate, eugenol, hexyl octanoate, bornyl acetate, γ-methyl ionone, 1,4-cineole, 3,7-dimethyl-2-methylene-6-octen-1-ol, 8-decenal, N-(2-hydroxy-2-phenylethyl)-2-isopropyl-5,5-dimethylcyclohexane-1-carboxamide, mustakone, and (2E)-4-methyl-2,4-tridecadienal.

The application discloses a method for preparing methyl valerate by butene carbonylation, and belongs to the field of catalytic chemistry. Raw materials containing butene, carbon monoxide and methanol are introduced into a reactor loaded with a solid acid catalyst, and a product containing methyl valerate is obtained through reaction. The application provides a new method for preparing methyl valerate by butene carbonylation with a solid acid catalyst. The method for preparing methyl valerate has the advantages of cheap and easily obtained raw materials, small corrosion of the system, easy separation of the product, less waste discharge, easy engineering of the fixed bed process, and suitability for single large-scale production.

To provide: a composition from which molded objects having excellent durability are obtained; a polymer, a cured object and a molded object which are obtained using the composition; and a method for producing poly(methyl methacrylate) using the composition.SOLUTION: The composition comprises methyl methacrylate and methyl pivalate and has a methyl pivalate concentration greater than 0 mass ppm and less than or equal to 10,000 mass ppm based on the entire composition.SELECTED DRAWING: Figure 1

The present invention addresses the problem of providing: a composition from which molded objects having excellent heat resistance are obtained; a polymer, a cured object, and a molded object which are obtained using this composition; and a method for producing poly(methyl methacrylate) using this composition.　This composition comprises methyl methacrylate, methyl pivalate, and water and has a methyl pivalate concentration higher than 0 mass ppm but not higher than 10,000 mass ppm with respect to the whole composition and a water concentration higher than 0 mass ppm but not higher than 10,000 mass ppm with respect to the whole composition.

The present invention addresses the problem of providing: a composition capable of controlling thermal decomposability of a molded body; a polymer obtained by using the composition; a cured product and a molded body; and a method for producing polymethyl methacrylate.　The present invention relates to: a composition containing methyl methacrylate, methyl pivalate, and methyl isobutyrate, wherein the content of methyl pivalate in the composition is more than 0 ppm by mass and 50000 ppm by mass or less, and the content of methyl isobutyrate in the composition is more than 0 ppm by mass and 2000 ppm by mass or less; a polymer obtained using the composition; a cured product; a molded body; and a method for producing polymethyl methacrylate obtained by polymerizing methyl methacrylate in the composition.

To provide: a composition from which molded objects having excellent durability are obtained; a polymer, a cured object and a molded object which are obtained using the composition; and a method for producing poly(methyl methacrylate) using the composition.SOLUTION: The composition comprises methyl methacrylate and methyl pivalate and has a methyl pivalate concentration greater than 0 mass ppm and less than or equal to 10,000 mass ppm based on the entire composition.SELECTED DRAWING: Figure 1

The present invention discloses a method for preparing ultra-low freezing point aviation fuel components. This method uses ketones derived from biomass platform compounds such as acetone and methyl pivalate as raw materials, uses N,N-dimethylformamide (DMF) as solvent, and performs Claisen condensation under the catalysis of potassium tert-butoxide to prepare a long carbon chain oxygen-containing precursor with a branched structure. This precursor is then hydrodeoxygenated over a metal-solid acid bifunctional catalyst to produce a hydrocarbon fuel with a low freezing point. The preparation method disclosed in the present invention has a low reaction temperature, is simple to operate, and has high selectivity and yield. The freezing points of the prepared aviation fuel components are all less than 60°C, and some components have freezing points below 100°C.

The application discloses a method for preparing methyl tert-butyl ether (MTBE) and / or tert-butyl alcohol (TBA) and belongs to the field of heterogeneous catalytic conversion. The method comprises the following steps: contacting raw material gas containing MTBE and / or TBA, CO and a solid acid catalyst, and reacting to obtain methyl pivalate and / or pivalic acid; the solid acid catalyst comprises an acidic zeolite molecular sieve. The method adopts a molecular sieve catalyst to catalyze the carbonylation of MTBE and TBA under gas-solid phase conditions to generate methyl pivalate and pivalic acid, the selectivity of the products is high, the products are easy to separate from the catalyst, the deactivated catalyst can be regenerated, the process is simple and economical, and a new path for preparing high-value-added chemicals from MTBE and TBA is opened up.

To provide: a composition capable of yielding a molded body having excellent heat resistance; a polymer, a cured product and a molded body which are obtained using this composition; and a method for producing poly(methyl methacrylate) using this composition.SOLUTION: The composition contains methyl methacrylate, methyl pivalate, and methyl butenoate. The concentration of methyl pivalate is more than 0 ppm by mass and less than or equal to 10,000 ppm by mass of the overall composition. The concentration of methyl butenoate is more than 0 ppm by mass and less than or equal to 2,000 ppm by mass of the entire composition.SELECTED DRAWING: Figure 1

The present invention addresses the problem of providing: a composition with which thermal decomposition properties of a molded body can be controlled; a polymer, a cured product and a molded body which are obtained using this composition; and a method for producing poly(methyl methacrylate) using this composition.　The present invention relates to a composition which contains methyl methacrylate, methyl pivalate and ethyl methacrylate. The concentration of methyl pivalate is more than 0 ppm by mass and not more than 10,000 ppm by mass of the overall composition. The concentration of ethyl methacrylate is more than 0 ppm by mass and not more than 10,000 ppm by mass of the overall composition.

The present invention addresses the problem of providing: a composition able to yield a molded body having excellent heat resistance; a polymer, a cured product and a molded body which are obtained using this composition; and a method for producing poly(methyl methacrylate) using this composition.　The present invention relates to a composition which contains methyl methacrylate, methyl pivalate and methyl methylbutenoate. The concentration of methyl pivalate is more than 0 ppm by mass and not more than 10,000 ppm by mass of the overall composition. The concentration of methyl methylbutenoate is more than 0 ppm by mass and not more than 2000 ppm by mass of the overall composition.

The invention relates to a method for detecting impurities in a process for preparing valproic acid, sodium valproate or magnesium valproate by atom economy reaction, which comprises the following steps of: selecting a gas chromatograph with the model of Agilent 8890, and detecting valproic acid prepared by atom economy reaction and process impurities thereof by gas chromatography; the detection conditions of the gas chromatography are as follows: a chromatographic column is DB-FFAP, and the specification is 0.32 mm * 60 m, 0.5 [mu] m; the carrier gas is nitrogen; the detector is an FID (Flame Ionization Detector); the flow rate is 2ml / min; the sample injection volume is 2 microliters; the temperature of a sample inlet is 220 DEG C; the column temperature is 100 DEG C; in the heating procedure, the initial temperature is 100 DEG C and kept for 5 min, then the temperature is increased to 140 DEG C at the speed of 4 DEG C / min and kept for 5 min, and then the temperature is increased to 200 DEG C at the speed of 4 DEG C / min and kept for 15 min; the operation time is 50 min; the temperature of a detector is 220 DEG C; the method comprises the following steps of: injecting 2 microliters of diluent dichloromethane, 2 microliters of reference solution and 2 microliters of test solution into a gas chromatograph, and recording a chromatogram; a test article is selected from a valproic acid crude product prepared by atom economy reaction; the impurities are selected from 2-propyl-4-pentenoic acid, valeric acid, 2-methyl valeric acid, 2-ethyl valeric acid, methyl valproate, ethyl valproate or propyl valproate; the solvent is a solvent; according to the detection result of the gas chromatography, the variety and the content of the process impurities in the valproic acid, the sodium valproate or the magnesium valproate are judged through a control sample.

To provide a composition capable of controlling thermal decomposability of molded articles, and polymers, cured products, and molded articles obtained using this composition, and a method for producing polymethyl methacrylate.SOLUTION: Provided is a composition containing methyl methacrylate, methyl pivalate, and methyl propionate, wherein the concentration of methyl pivalate is more than 0 mass ppm and 50000 mass ppm or less in the composition, and the concentration of methyl propionate is more than 0 mass ppm and 2000 mass ppm or less in the composition. Provided are a polymer, a cured product, and a molded article obtained by employing the composition, and a method for producing polymethyl methacrylate by polymerizing methyl methacrylate in the composition.SELECTED DRAWING: None

To provide a composition capable of controlling thermal decomposability of molded articles, and polymers, cured products, and molded articles obtained using this composition, and a method for producing polymethyl methacrylate using the composition.SOLUTION: Provided is a composition containing methyl methacrylate, methyl pivalate, and ethyl methacrylate, wherein the concentration of methyl pivalate is more than 0 mass ppm and 10000 mass ppm or less based on the entire composition, and the concentration of ethyl methacrylate is more than 0 mass ppm and 10000 mass ppm or less based on the entire composition.SELECTED DRAWING: Figure 1

To provide a composition capable of controlling thermal decomposability of molded articles, and polymers, cured products, and molded articles obtained using this composition, and a method for producing polymethyl methacrylate.SOLUTION: Provided is a composition containing methyl methacrylate, methyl pivalate, and methyl propionate, wherein the concentration of methyl pivalate is more than 0 mass ppm and 50000 mass ppm or less in the composition, and the concentration of methyl propionate is more than 0 mass ppm and 2000 mass ppm or less in the composition. Provided are a polymer, a cured product, and a molded article obtained by employing the composition, and a method for producing polymethyl methacrylate by polymerizing methyl methacrylate in the composition.SELECTED DRAWING: None

To provide a composition capable of yielding a molded article of superior heat resistance, a polymer, a cured product, and a molded article obtained using the composition, and a method for producing polymethyl methacrylate using the composition.SOLUTION: A composition contains methyl methacrylate, methyl pivalate, and water, in which a concentration of methyl pivalate is greater than 0 mass ppm and 10000 mass ppm or less based on the whole composition and a concentration of water is greater than 0 mass ppm and 10000 mass ppm or less based on the whole composition.SELECTED DRAWING: Figure 1

To provide: a composition capable of yielding a molded body having excellent heat resistance; a polymer, a cured product and a molded body which are obtained using this composition; and a method for producing poly(methyl methacrylate) using this composition.SOLUTION: The composition contains methyl methacrylate, methyl pivalate, and methyl butenoate. The concentration of methyl pivalate is more than 0 ppm by mass and less than or equal to 10,000 ppm by mass of the overall composition. The concentration of methyl butenoate is more than 0 ppm by mass and less than or equal to 2,000 ppm by mass of the entire composition.SELECTED DRAWING: Figure 1

The present invention addresses the problem of providing: a composition capable of controlling the thermal decomposition property of a molded body; a polymer obtained using the composition; a cured product; a molded body; and a method for producing a polymethyl methacrylate.　The present invention relates to: a composition containing a methyl methacrylate, a methyl pivalate, and a methyl propionate, wherein the content of the methyl pivalate in the composition is more than 0 ppm by mass to not more than 50,000 ppm by mass, and the content of the methyl propionate in the composition is more than 0 ppm by mass to not more than 2,000 ppm by mass; a polymer obtained using the composition; a cured product; a molded body; and a method for producing a polymethyl methacrylate by polymerizing the methyl methacrylate in the composition.