11 results about "Methyl gallate" patented technology

This invention discloses a method for preparing alkyl gallate without a dehydrating agent, belonging to the field of chemical reaction auxiliary technology. By optimizing the raw material ratio of the reaction system, precisely controlling the reaction environment parameters and the condensate separation rate, this invention utilizes the azeotropic properties of alcohol and water to achieve efficient separation of the water generated in the reaction. It can promote the forward esterification reaction without adding any dehydrating agent, achieving the same or even better water separation and reaction promotion effects without the need for a dehydrating agent. This invention eliminates the need for a dehydrating agent, and the synthesized methyl gallate, ethyl gallate, propyl gallate, octyl gallate, and lauryl gallate can reach a maximum content of 99.2%, with a stable product yield of 50-57g. This effectively reduces production costs, avoids the pollution problems caused by dehydrating agents, simplifies the production process, and possesses both green environmental protection and promising prospects for industrial-scale application.

The invention provides a construction method of a Xipayi gingival fixing liquid characteristic spectrum based on UPLC and a method for determining the content of characteristic components of Xipayi gingival fixing liquid. The construction method comprises the following steps: by taking gallic acid, methyl gallate, benzoic acid, 1, 2, 3, 6-tetragalloylglucose and 1, 2, 3, 4, 6-pentagalloylglucose as reference substances, respectively adding water for dissolving to obtain reference substance solutions; mixing the Xipayi gingival fixing liquid with water, and filtering to obtain a test solution; placing the test sample solution and the various reference substance solutions in an ultra-high performance liquid chromatograph, determining to obtain a test sample spectrum and a reference substance spectrum, and establishing a characteristic spectrum by adopting a traditional Chinese medicine chromatographic fingerprint spectrum similarity evaluation system. The specific chromatogram has good reproducibility and batch consistency, and can be used as a standard for overall quality evaluation. The construction method can also be used for content determination of the characteristic components, and integrated detection of characteristic spectrum construction and multi-index content determination is realized.

The invention discloses an aryl acetylene supramolecular polymer with adjustable circular polarization luminescence, preparation and application, and relates to the technical field of circular polarization luminescent materials, and the specific preparation method comprises the following steps: reacting methyl gallate with bromododecane to obtain a compound A; reacting the compound A with sodium hydroxide to obtain a compound B; the compound B, 1-(4-bromophenyl) ethylamine, 1-ethyl-(3-dimethylaminopropyl) carbodiimide and 4-dimethylaminopyridine are subjected to a reaction, and a first intermediate is prepared; reacting the first intermediate, dichlorobis (triphenylphosphine) palladium, copper iodide and trimethylsilylacetylene to prepare a second intermediate; reacting the second intermediate, dichlorobis (triphenylphosphine) palladium, copper iodide and a diiodo-substituted aromatic compound to prepare aryl acetylene; and S6, dissolving aryl acetylene in an organic solvent to obtain the aryl acetylene supramolecular polymer with adjustable circular polarization luminescence. The invention develops a CPL material with tunable properties.

The invention provides a catalyst component for olefin polymerization, a catalyst and application thereof, the catalyst component comprises Mg, Ti, halogen and an internal electron donor, and the internal electron donor comprises methyl gallate and / or a methyl gallate derivative. The invention provides the catalyst component taking the methyl gallate and / or the derivative thereof as the internal electron donor, the activity of the catalyst component is generally higher than that of the most commonly used catalysts of phthalate and diether internal electron donors in the industry, the stereoselectivity is good, and a polymer obtained by catalysis is high in isotacticity, regular in particle size and high in bulk density.

The application discloses a kind of degradable capsules preparation method for lowering blood lipid, belong to biomaterial technical field.It includes the following steps: gelatin, amylopectin, polylactic acid particles, cinnamamide and methyl gallate are separately packed into different raw material tanks;Polylactic acid particles are melted to 70-80 DEG C, methyl gallate is added, and is constantly stirred and heated to 85-90 DEG C, after 2-4 hours of processing, 65 DEG C constant temperature water bath is kept for 30-60 minutes under nitrogen protection;Gelatin and cinnamamide are added in constant temperature water bath, and are heated to 90-95 DEG C, after 5-6 hours of sufficient reaction, 0.006 times of potassium persulfate powder of gelatin quality is added, and is stirred uniformly, and continue to react for 25-35 minutes;The solution after the above reaction is added, amylopectin is fully stirred and mixed, 0.5 times of cysteine of amylopectin quality is added at 75 DEG C, and is fully mixed, and freeze-drying is obtained after low-temperature freeze-drying.The prepared capsule has high encapsulation efficiency and large drug loading, and the drug efficacy of unit capsule is improved.

A method of making a flame retardant, and phosphorylated bio-based flame retardants, are provided. The method includes reacting a bio-based-derived starting compound with a phosphate-containing compound or o-phosphoric acid to obtain a phosphorylated bio-based material. The phosphate-containing compound may be diphenyl phosphoryl chloride. The obtained phosphorylated bio-based material may be phosphorylated cardanol, vanillin diphenyl phosphate, vanillyl alcohol diphenyl phosphate, methyl gallate triphenyl phosphate, bis(dihydrogenphosphate) of vanillyl alcohol diglicidyl ether, or bis(dihydrogenphosphate) of bisphenol A diglicidyl ether. An article including the phosphorylated bio-based flame retardant is also provided. The article may be a building material, a textile, a plastic, a foam, an adhesive, packaging, and an electrical housing.

The application discloses a circularly polarized luminescence controllable arylacetylene supramolecular polymer, a preparation method and application, relates to the technical field of circularly polarized luminescence materials, and specifically comprises the following steps: reacting methyl gallate and bromododecane to obtain compound A; reacting the compound A and sodium hydroxide to obtain compound B; reacting the compound B, 1-(4-bromophenyl)ethylamine, 1-ethyl-(3-dimethylaminopropyl)carbonyldiimide and 4-dimethylaminopyridine to obtain a first intermediate; reacting the first intermediate, dichlorobis(triphenylphosphine)palladium, copper iodide and trimethylsilyl acetylene to obtain a second intermediate; reacting the second intermediate, dichlorobis(triphenylphosphine)palladium, copper iodide and diiodo-substituted aromatic compounds to obtain arylacetylene; and S6: dissolving the arylacetylene in an organic solvent to obtain the circularly polarized luminescence controllable arylacetylene supramolecular polymer. The CPL material with adjustable characteristics is developed.

This invention belongs to the field of tea production fermentation technology, specifically disclosing a *Fungi* strain for improving tea quality and its application, namely *Fungi* strain Fungi37, classified and named... Diaspora masirevicii The strain, with accession number CGMCC No. 42364, is a rare endophytic fungus found in tea plants and is the first reported strain in the field of tea. Experiments have shown that this strain can significantly enhance the brightness and vividness of tea infusion and play a certain regulatory role in the flavor presentation of tea. Metabolomics analysis shows that this bacterium can promote the large-scale conversion and synthesis of active ingredients such as methyl caffeate, methyl gallate, ethyl gallate, hesperidin, and isosulfanol during tea fermentation. Furthermore, in an exogenous sugar-added environment, it can promote the conversion and synthesis of beneficial components such as dihydromyricetin, yarrow aglycone, isochlorogenic acid A, plantainin, malic acid, sorbic acid, and gluconic acid.

The present invention discloses ginseng extract, a preparation method and its application in whitening, rejuvenating and wrinkle-removing products. The whitening skin care product used is mainly diglucosyl gallic acid containing ginseng powder. First, a cyclic γ-polyglutamic acid resin is synthesized. The resin has a good pore structure. Then, the synthesized cyclic γ-polyglutamic acid resin is added to the diglucosyl gallic acid to modify it. The resin has good biocompatibility and can increase the hydrophilicity and stability of the protein. At the same time, based on the unique properties of American ginseng, it is ground and added to the diglucosyl gallic acid after modification; acetylation reaction is used to synthesize diglucosyl gallic acid, that is, methyl gallate and α-pentaacetyl glucose are mixed in xylene, using boron trifluoride ether complex as a catalyst, pentaacetyl glucose is added and introduced into the phenolic hydroxyl group of methyl trihydroxybenzoate, and then salified, acidified and separated to obtain diglucosyl gallic acid.

The invention belongs to the technical field of tea production and fermentation, and particularly discloses a phlomis spp. Strain capable of improving tea quality and application of the phlomis spp. Strain, the classification name of the phlomis spp. Strain is Diaporthe masrevicii, and the preservation number of the phlomis spp. Strain is CGMCC No.42364. The strain is reported for the first time in the field of tea and belongs to a rare tea tree endophyte. Experiments prove that the strain can significantly improve the brightness and the brilliance degree of tea soup, and has a certain adjusting effect on the taste of the tea soup; metabonomics analysis shows that the strain can promote mass conversion and synthesis of functional components such as methyl caffeate, methyl gallate, ethyl gallate, hesperidin, isoschaftoside and the like in a tea soup fermentation process; the conversion and synthesis of beneficial components such as dihydromyricetin, leucocyanidin, isochlorogenic acid A, plantaginin, malic acid, sorbic acid and gluconic acid can be promoted in an exogenous sugar addition environment.

This invention discloses a triphenylamine supramolecular polymer capable of tunable circular polarization, its preparation method, and its applications. The polymer is formed by the co-assembly of a triphenylamine donor and a naphthyl monoamide acceptor through intermolecular non-covalent interactions. The preparation method of the triphenylamine donor is as follows: S1: Methyl gallate and bromododecane are added to DMF to react and obtain compound A; S2: Compound A and sodium hydroxide are added to ethanol to react and obtain compound B; S3: Compound B, 1-(4-bromophenyl)ethylamine, 1-ethyl-(3-dimethylaminopropyl)carbodiimide, and 4-dimethylaminopyridine are added to dichloromethane to react and obtain compound C; S4: Compound C, Pd(PPh3)2Cl2, CuI, and trimethylsilylacetylene are added to triethylamine under an inert atmosphere to react and obtain compound D; S5: Compound D, Pd(PPh3)2Cl2, CuI, and tris(4-iodophenyl)amine are added to triethylamine under an inert atmosphere to react and obtain the triphenylamine donor. This invention develops a CPL material with a wide range of adjustable properties.