9 results about "Phenylacetate" patented technology

The invention discloses a positive pole piece and a preparation method thereof, a diaphragm-free battery and a battery. The positive pole piece comprises a positive pole current collector and a positive pole active material layer arranged on at least one side of the positive pole current collector, the positive pole active material layer comprises a polymer, and the polymer is formed by polymerizing at least one of small molecules of the following raw material components: vinylethylene carbonate, vinylene carbonate, 2, 3, 4-trimethyl-1, 3-pentanedione, 2, 3, 4-trimethyl-1, 3-pentanedione and 2, 3, 4-trimethyl-1, 3-pentanedione. The adhesive is prepared from 2, 4-hexadienoic acid, allyl trifluoroacetate, diethyl allylmalonate, allyl methacrylate, allyl chloroformate, allyl phenylacetate, allyl acetate, allyl 4-hydroxybenzoate and allyl phenoxyacetate. The adhesive is prepared from the following raw materials: 1, 4-hexadienoic acid, allyl trifluoroacetate, diethyl allylmalonate, allyl methacrylate, allyl chloroformate, allyl phenylacetate, allyl acetate, allyl 4-hydroxybenzoate and allyl phenoxyacetate. The positive pole piece provided by the invention comprises the polymer, so that the interface impedance can be reduced, and the rate capability of the battery can be improved.

The application relates to the technical field of catalytic materials, and relates to an organic photocatalytic material and a preparation method thereof.1, comprising the following steps: mixing modified N-hydroxy phthalimide phenylacetate, an aliphatic nitroalkane, 2,6-dimethylpyridine, a photocatalyst and a solvent, then irradiating under visible light, placing in an inert atmosphere, stirring for 2-8 hours, and obtaining a product through post-treatment to obtain a final product; the mass ratio of the modified N-hydroxy phthalimide phenylacetate, the nitro compound, the 2,6-dimethylpyridine, the photocatalyst and the solvent is 2-5:1-2:1-3:1:8-11. The visible light catalysis method can be used to synthesize the nitro compound under mild conditions, and further provides a green and efficient new path for the preparation of a nitrogen-containing drug intermediate.

5′-O-Phenylacetyluridine effectively delivers both phenylacetate and uridine to a subject. It can be used to treat hepatic encephalopathy and genetic disorders of the hepatic nitrogen cycle.

The invention relates to the technical field of synthesis of medical intermediates, spices or food additives, in particular to a preparation method of ethyl 4-bromophenylacetate. The preparation method comprises the following steps: (1) adding p-bromophenylacetic acid, ethanol, a water-carrying agent and an acid catalyst into a reactor, heating to reflux for reaction, and separating and removing water in the reaction process; (2) after the reaction is finished, concentrating a reaction solution to recover the water-carrying agent, so as to obtain a crude product of ethyl 4-bromophenylacetate; and (3) carrying out reduced pressure distillation on the ethyl 4-bromophenylacetate crude product, and collecting fractions at 100-120 DEG C under the absolute pressure of 100-200Pa to obtain the ethyl 4-bromophenylacetate product. According to the method, 4-bromophenylacetic acid is used as a raw material and is subjected to acid catalysis in a solvent azeotropic with water, esterification reaction with ethanol is performed to obtain a target product, procedures such as neutralization, extraction and drying are not needed in post-treatment, the production period is effectively shortened, and the method is economical, environmentally friendly, simple to operate and more suitable for industrialization.

The present invention relates to a technique for masking unpleasant odor (off- flavor) generated from a food or beverage. One embodiment of the present invention provides an unpleasant odor (off-flavor) suppressing agent, a fragrance composition, a food or beverage in which an unpleasant odor (off-flavor) is masked, a production method of the food or beverage, and a method for masking an unpleasant odor (off-flavor). The present invention makes it possible to suppress an unpleasant odor (off-flavor) of a food or beverage by using, as active ingredient, one or more selected from the group consisting of oleic acid, β-damascenone, 4-methyl-2-phenyl-2-pentenal, menthyl 3-hydroxybutyrate, dimethyl benzyl carbinyl butyrate and methyl 4-tert-butyl phenylacetate.

The invention belongs to the technical field of medical preparations and pharmaceutical preparations, and particularly relates to a method for improving the stability of citric acid tofacitinib oral liquid and the citric acid tofacitinib oral liquid. The oral liquid takes water as a solvent, contains citric acid tofacitinib, sodium benzoate and ethylenediamine di-o-phenyl sodium acetate, and the pH is regulated to 3.3-4.3 through a pH regulator. The sodium ethylenediamine diphenylacetate in the tofacitinib citrate oral liquid can synergistically inhibit the generation of impurities, block the degradation path of a main drug, stabilize the content of a preservative, significantly reduce the increase of impurities in acceleration and long-term storage, maintain the stability of the content and pH of the main drug, and effectively guarantee the product quality and efficacy.

The utility model discloses a safety monitoring device for oxo-phenylacetate synthesis, and belongs to the technical field of safety monitoring. The utility model relates to a safety monitoring device for oxo-phenylacetate synthesis. The safety monitoring device comprises a substrate, an adjusting assembly, a sensor and a monitoring alarm, a sliding groove is formed in one side face of the base plate, and a monitoring alarm is fixedly arranged on the other side face of the base plate. The adjusting assembly is in sliding connection with the sliding groove, and the adjusting assembly is connected with the output end of an external driving motor so as to adjust the position of the adjusting assembly on the base plate; the sensor is arranged on the adjusting assembly, and the sensor is electrically connected with the monitoring alarm; the position of the safety monitoring device can be rapidly moved, the monitoring position of the sensor in the synthesis device is adjusted, the monitoring area of the safety monitoring device is expanded, and the practicability of the device is improved.

This disclosure relates to crystalline and solvate forms of nucleoside reverse transcriptase translocation inhibitors (NRTTIs), and their pharmaceutical compositions, which are useful for the treatment and prevention of Retroviridae virus infections, including infections caused by the HIV virus. This disclosure particularly provides crystalline forms of (2R,3S,5R)-5-(6-amino-2-fluoro-9H-purine-9-yl)-2-ethynyl-2-((2-phenylacetoxy)methyl)tetrahydrofuran-3-yl 2-phenylacetate, selected from crystalline form II, crystalline form III, crystalline form IV, and crystalline form V.

The invention discloses a raw material ratio control device for esterification reaction of oxo-phenylacetate, and belongs to the technical field of phenylacetate production. The device comprises a reaction kettle, a phenylacetic acid storage box, a proportioning assembly, a feeding assembly and a detection assembly, the phenylacetic acid storage box and the proportioning assembly are respectively mounted on the upper side of the reaction kettle and are respectively communicated with the reaction kettle through pipelines; the feeding assembly is arranged on the upper side of the phenylacetic acid storage box and the proportioning assembly and is used for adding alcohols; the proportioning assembly at least comprises a proportioning box; a proportioning mechanism is arranged in the proportioning box, the proportioning mechanism at least comprises two independent proportioning cavities, and the same alcohol is arranged in the different proportioning cavities; the detection assembly is arranged in the reaction kettle and is used for detecting the conversion rate of the reaction in real time; according to the invention, a plurality of alcohol raw materials can be proportioned, the subsequent supplementation and addition of alcohols can be controlled according to the real-time conversion rate, and the phenylacetate raw material proportioning and feeding production efficiency can be improved.