43 results about "Acetylpyruvic acid" patented technology

The invention discloses a preparation process for 2-Chloronicotinic acid. In the prior art, the disadvantage is that the overdosed catalyzer is used and has a bad effect, the oxidation yields are very low; during the chlorination reaction, POCl3 can make chloro-substitutions on a plurality of positions of nicolinamide- N- oxido, which leads to that the chloro-substitution products on 2-position have low yields. In the invention, with the existence of acetyl pyruvic molybdenum, the 3-Pyridinecarbonitrile takes water as the solvent and is dripped in 20 to 30 percent of H2O2, and then is made a heat preservation to realize a full oxidation reaction; under the anhydrous reaction and with the positive pressure protection of nitrogen, the acquired nicolinamide- N- oxido is cooled between minus 10 and 10 DEG C to be diluted by the halohydrocarbon solvent, and then is dripped in the organic base, and is reacted with the chlorination reagent under the action of phenyl dichlorophosphate; the strong alkaline solution is used to make a dehydration reaction with the acquired 2-chloro-3-cyanopyridine. The invention takes the acetyl pyruvic molybdenum as the catalyzer and oxidizer, has high oxidation yields; adopts the organic base as the acid-binding agent, makes chloro-substitutions between the chlorination reagent and the nicolinamide- N- oxido, and has above 85 percent of chloro-substitution yields.

The invention provides a method for preparing penicillanic acid sulfoxide diphenyl methyl ester. Penicillanic acid sulfoxide is prepared by the following four-step reaction. Hydrobromic acid is used as a brominating agent for substituting potassium bromide and bromine, and hydrogen peroxide is used as an oxidant for substituting peracetic acid and chloroperoxybenzoic acid, so the preparation method is safe and environment-friendly; in addition, the hydrogen peroxide is reacted with a compound (iii) under the catalysis action of acetyl molybdenum pyruvate so that the reaction mole yield can be obviously improved and reaches 90 percent; zinc powder which substitutes palladium and carbon is used as a reducing agent, so high-pressure equipment is not needed in the reaction; and the preparation method simplifies the process operation step, is easy for industrialized production, and reduces the production cost.

The invention discloses a copper catalyst system for decarboxylation coupling reaction, which comprises a copper-containing compound and an oxidant in a mol ratio of 1:(10-40), wherein the copper-containing compound is one or mixture of cuprous iodide, cupric acetylacetonate, cuprous bromide, cupric sulfate and copper powder; and the oxidant is tert-butyl hydroperoxide, di-tert-butyl peroxide or dicumyl peroxide. The catalyst system can catalyze the decarboxylation coupling reaction of cinnamic acid and methylbenzene compounds to prepare olefin compounds. Compared with the existing noble-metal-containing catalyst system, the catalyst system disclosed by the invention uses the cheap copper-containing compound instead of noble metal, thereby lowering the cost; and the byproduct is only carbon dioxide, thereby being beneficial to environment protection and cost saving, and satisfying the requirement for green chemistry.

The present invention provides a sol-gel composition which is dilutable with water in any proportion and is based on the reaction of at least the following components: (i) a glycidyloxypropylalkoxysilane, (ii) an aqueous silica sol having a solids content of > 1% by weight, (iii)an organic acid as hydrolysis catalyst, and (iv) n-propyl zirconate, butyl titanate or titanium acetylacetonate as crosslinker, starting from a mass ratio of the solids mass of component (ii) to component (i) <= 0.75, a process for preparing it and its use, in particular as a sol-gel composition for corrosion control coatings, a corresponding corrosion control coat or primer coat, and articles equipped with such a coating.

The invention discloses a preparation process for molybdenum acetylacetonate. In the prior art, the acetylacetone is easy to be oxidized in the air and polymerized under refluence, so the unreacted molybdenum trioxide and by-products exist in the product, the product is impure and has low yields. In the invention, the molybdenum trioxide is dissolved into the weak-base inorganic alkaline solution, then the antioxidant is added into the solution, the temperature rises to forty to seventy Celsius system, the acetylacetone is dripped into the solution, then the non-oxidizing inorganic acid is added to adjust the solution to the weak acid, then the temperature is preserved until the crystal of molybdenum (II) 2,4-pentanedionate hydrate is precipitated; then the procedure of cooling, filtering, fulling is done to remove the adhesive acetylacetone from the filter cake. The invention is reacted with the molybdenum trioxide under low temperature, thereby the invention avoids the self-polymerization of the acetylacetone, and has less side reactions, high yields as well as high purity.

The invention discloses a preparation method of a Cu2ZnSnSxSe4-x nanocrystal with low cost and high quality, which comprises the steps of: adding reactant precursors of oleylamine, cupric acetylacetonate, zinc acetate, tin tetrachloride, sulfur powder and selenium powder into a reaction flask, then heating the reactant precursors for reacting to obtain the Cu2ZnSnSxSe4-x nanocrystal with high quality. The invention has the advantages that the preparation method of the nanocrystal is simple, the materials of the precursors have low cost and no toxicity, and the prepared nanocrystal particles have better dispersivity and crystallinity and the like. The nanocrystal prepared by the invention can be used as an absorption layer of a photovoltaic device.

The invention discloses a preparation method of low-cost and high-quality Cu2CdSnSe4 nano crystals. The method comprises the following steps of: adding oleamide, acetylacetone acid copper, cadmium acetate, tin acetate and selenium powder which are reactant precursors into a reaction flask; then raising the temperature for reacting; and finally obtaining the high-quality Cu2CdSnSe4 nano crystals. The invention has the advantages that the preparation method of the nano crystals is simple; the used precursor materials have low cost; and the prepared nano crystal granules have better dispersity and crystallinity, and the like. The nano crystals prepared by using the method can be used as materials of thermoelectric devices.

The invention discloses a linear Cu-Ni alloy nanocrystal and a synthesis method thereof. The nanocrystal is linear and has a face-centered cubic structure. According to the synthesis method, polyvinylpyrrolidone (PVP) is used as a coating agent, aniline is used as a reducing agent, and PVP, aniline, copper acetylacetonate and nickel acetylacetonate are dissolved in benzyl alcohol, and a solvothermal process is carried out so as to prepare the nanocrystal. Results show that nanoparticles can directionally form a linear nanostructure through addition of a proper amount of PVP and a small amountof aniline; certain special exposed crystal faces and a large amount of twinning dislocations exist and can provide more active sites for the nanocrystal; and when used as a catalyst, the nanocrystalcan effectively treat exhaust gas and realize degradation of organic matters in waste water. The success of the preparation method for the nanocrystal is of certain theoretical and practical significance to morphology-controllable synthesis of nanocrystals, controllable synthesis of transition-metal and double-metal nanocrystals and application of the catalysis performance of nanocrystals with special morphology.

The invention belongs to the field of catalysts, and in particular relates to a palladium-free, amine-free and ligand-free copper catalyst system. The catalyst system can catalyze a Sonogashira reaction to prepare alkyne compounds. The catalyst system comprises cupric salt, potassium carbonate and a solvent dimethyl sulfoxide, wherein the molar ratio of the cupric salt to the potassium carbonate is 1:20-40; and the cupric salt is one or the mixture of more than one of copper acetate, copper acetylacetonate, copper trifluoromethanesulfonate and copper sulfate. In the catalyst system, noble metal is replaced by the stable cupric salt, so that the catalyst system is economic, cheap and non-toxic; for a substrate with poor activity, the catalyst system is added with TBAB to promote the reaction remarkably; and the catalyst system is suitable for large-scale application and industrialized production.

An electroluminescent device having a phosphor layer including a phosphor material and a pair of electrodes for applying a voltage to the foregoing phosphor layer wherein an acetylacetonato complex salt is included in the phosphor layer to realize an electroluminescent device with high luminance. Further, the EL device realizes an electroluminescent device with higher luminance by constructing the foregoing phosphor layer so as to contain acetylacetonato complex salt, in which ligands coordinate with a trivalent metal atom, particularly a metal atom of Group III or Group XIII as the foregoing acetylacetonato complex salt.

Dental material which contains an antimicrobial active ingredient according to general formula (I),in which R1=H, C1 to C3 alkylene residue; R2=a linear or branched C4 to C20 alkylene residue; R3=a C6 to C20 alkylene residue; and A−=Cl−, Br−, I−, F−, OH−, alkyl and aryl alcoholate, thiolate, NO3−, BO33−, PO43−, HPO42−, H2PO4−, alkyl and aryl phosphate, alkyl and aryl phosphonate, PF6−, TiF62−, BF4−, acetylacetonate, β-diketonate or anion of a β-keto ester. The dental material is suitable in particular as tooth filling material, material for inlays or onlays, tooth cement, enamel / dentine adhesive, veneering material for crowns and bridges, or as material for false teeth.

The invention relates to a preparation method of a Pt-Cu linear nano-catalyst. The method comprises the following steps of adding acetyl acetone platinum and potassium iodide into oleylamine, then adding copper acetylacetonate, reacting for 3 to 24 hours at the temperature of 160 to 180 DEG C; finally washing through absolute ethyl alcohol to obtain the Pt-Cu linear nano-catalyst. The method for preparing the Pt-Cu linear nano-catalyst, provided by the invention, is simple and convenient without using a template, simple to operate, and easy for production.

This invention comprises a process for hydrogenation of aldehydes to alcohols using novel homogeneous catalysts. The catalysts are generated in situ under hydrogen and carbon monoxide gases in a suitable solvent, by mixing a rhodium catalyst precursor, such as Rh(CO)2 acetoacetonate and a defined ligand.

The invention discloses one-component silane-modified polyether sealant for ALC (autoclaved lightweight concrete) plates, made from, by mass, 100 parts of silane-modified polyether resin, 90 to 150 parts of a plasticizer, 100 to 300 parts of a filler, 0 to 25 parts of a pigment, 0 to 20 parts of a thixotropic agent, 0.5 to 5 parts of an ultra-violet absorbent, 0.5 to 5 parts of a light stabilizer,0.5 to 5 parts of a water remover, 2 to 3 parts of a first adhesion promoter, 0.5 to 1 part of a second adhesion promoter, and 0.05 to 2 parts of a catalyst. Silane-modified polyether resin of whichthe number-average molecular weight is 16000 to 28000 g / mol and which is of linear structure is chosen to serve with the reaction product of dibutyltin bis(2,4-pentanedionate) and / or tetraethyl orthosilicate and dibutyltin bis(acetoxy) in cooperation with the first adhesion promoter, the second adhesion promoter and other components to prepare the one-component silane-modified polyether sealant for ALC plates. The one-component silane-modified polyether sealant for ALC plates has the advantages of ultra-low modulus, high extension rate, rapid solidification, good adhesion with ALC plates, good security and greenness, good stability and outstanding painting property.

The present invention relates to a preparation of β-γ ene carboxylic or ketone derivatives, which may also have particular requirement on the configuration of the carbon-carbon double bond. The method requires a thermal treatment of α-β unsaturated malonate or acetylacetonate derivatives in the presents of at least one carboxylic acid and at least one alkaline, alkaline-earth or lanthanide halide or carboxylates.

The invention relates to a method for synthesizing a water phase of Mn<2+> doped CdS fluorescent quantum dots by stable acetopyruvic acid. The method comprises the following steps: (1), adding acetopyruvic acid into redistilled water and heating to the temperature of 80 DEG C with magnetically stirring to sufficiently dissolve the acetopyruvic acid so as to form homogeneous solution; (2), adding inorganic cadmium salt and thiocarbamide into aqueous solution of the acetopyruvic acid to form homogeneous reaction solution; (3), adding aqueous solution of the inorganic cadmium into the reaction solution and performing the reflux reaction on the mixed solution for hours; and (4), cooling to the room temperature, carrying out high speed centrifugation, washing precipitates with water and then dispersing the precipitates in water by ultrasound to prepare aqueous solution of the Mn<2+> doped CdS fluorescent quantum dots. Compared with the prior art, the method disclosed by the invention is simple, rapid and convenient to operate and is low in cost; and the prepared product has a fluorescent property capable of being reversibly regulated by redox reaction and can be developed into a potential fluorescence indicator, is used for biochemical analysis, living imaging of cells and tissues and fluorescent detection of redox reaction and provides a novel development direction for research in the fields of biological detection, chemical analysis and the like.

The invention discloses a copper catalyst system for sonogashira coupling reaction. The copper catalyst system comprises copper salt, phosphine ligands and inorganic alkaline according to a mol ratio of 1: (50000-200000): (200000-1000000), wherein the copper salt is selected from one kind of materials or a mixture of more than one kind of materials from copper iodide, copper acetylacetonate, copper bromide, copper sulfate and copper powder, and the phosphine ligands are trivalent phosphine ligands. The invention discloses the novel copper catalyst system for sonogashira coupling reaction. Compared with the existing noble-metal-containing catalyst system, the catalyst system has the advantages that the cheap copper salt is used for replacing the noble metal, the cost is greatly reduced, inaddition, the environmental-friendly water can be adopted as reaction solvents, the environment is favorably protected, the cost is favorably saved, and the reaction also obtains great progress in green chemistry.

Disclosed is a rubber composition for adhesive bonding which contains 100 parts by weight of a rubber component and 0.1-3 parts by weight of a metal acetylacetonate having an average particle diameter of not more than 50 mum. Such a rubber composition for adhesive bonding is improved in break characteristics.

The invention discloses a copper salt catalyzing system. The copper salt catalyzing system is used for catalyzing esterification reaction to prepare a methyl benzoate compound. The copper salt catalyzing system is composed of a copper salt, an oxidant and an alkali, wherein the mol ratio of the copper salt to the oxidant is 1: 15 to 40; the copper salt is selected from one or a mixture of more than one of 8-hydroxyquinoline copper, cupric acetate monohydrate, copper acetylacetonate, cuprous bromide, anhydrous cupric sulfate, copper fluoride dihydrate and pure copper; and the oxidant is one of tert-butyl hydroperoxide, di-tert-butyl oxide or dicumyl peroxide. The newly developed copper salt catalyzing system for benzyl alcohol esterification reaction greatly reduces the reaction cost, the raw materials are simple and easy to gain, the system is in a wide applicable scope of substrates, the yield is up to 99%, the reaction is carried out in the air atmosphere, the operation is simple, and the chemoselectivity is high; and the copper salt catalyzing system is environmentally friendly, has no three-waste discharge, meets green chemistry requirements, and is also beneficial for industrial application.

The invention discloses a novel lubricating oil which comprises the following components in parts by weight: 50-70 parts of rose oil, 60-70 parts of grape seed oil, 10-15 parts of ethyl acetopyruvate, 8-12 parts of 2-oxocyclopentanecarboxylate, 7-10 parts of guaiazulene, 9-13 parts of sebacic acid, 6-10 parts of cinnamic acid, 5-9 parts of 4-fluoroacetanilide, 4-8 parts of dichorodimethyl pyridol, 8-15 parts of dilinoleic phosphite ester, 12-16 parts of vanillyl butyl ether, 3-7 parts of 2,3,4-trihydroxybenzophenone and 9-13 parts of difenidol hydrochloride. Various chemical reagents are added into the vegetable oil, so that the permeability of the lubricating oil is increased and the lubricating oil can adapt to different environments under low temperature and high temperature.

The present invention provides a method for preparing an antiulcer agent, 2-(2-pyridylmethylsulphinyl)benzimidazoles, such as Omeprazole, Lansoprazole and Pantoprazole, which includes oxidizing an intermediate having a linkage of methylthio group (—CH2S—) to methylsulfinyl (—CH2S(O)—) in the presence of an oxidation catalyst of acetyl acetonate of molybdenium (II) [(CH3C(O)CH2C(O)CH2)2Mo].

The invention relates to the technical field of attractants, in particular to a termite attractant which comprises ethyl acetylacetonate. The attractant provided by the invention is derived from biological control fungus metabolites. The monomer pure compound adopted by the invention is stable in property, environment-friendly and good in termite attraction effect, and plays a key role in killing termites.

Highly fluorescent metal-supramolecules based on terpyridyl monomers and transition metals were obtained. These robust supramolecules offer high quantum yields from violet to blue, green or yellow emission. Owing to desirable properties such as high brightness, high purity, low cost, and high thermal stability, these supramolecules appear to be promising emitters for polymeric light-emitting diodes (PLEDs). The molecular structure of the supramolecule is represented by formula I: (I) wherein M represents IB, IIB, VIIA, VIIIA group or lanthanide metal; R is each independently selected from hydrogen, halogen, alkyl, substituted Alkyl, aryl, substituted aryl or well-known donor and acceptor groups; X is independently in each occurrence and is a nitrogen or carbon atom; R' is selected from alkoxy, aryloxy, hetero Aryloxy, alkyl, aryl, heteroaryl, alkyl ketone, aryl ketone, heteroaryl ketone, alkyl ester, aryl ester, heteroaryl ester, alkyl amide, aryl amide, heteroaryl amide, alkylthio, arylthio, fluoroalkyl, fluoroaryl, amine, imide, carboxylate, sulfonyl, alkyleneoxy, polyalkyleneoxy, or combinations thereof . n is an integer from 1 to 100,000; Z is a counterion selected from the group consisting of acetate, acetylacetonate, cyclohexanebutyrate, ethylhexanoate, halide, hexafluorophosphate, hexafluoroacetylacetonate, nitrate, Perchlorate, phosphate, sulfate, tetrafluoroborate or fluoromethanesulfonate; y is an integer from 0-4.

The invention discloses a method for synthesizing ruthenium acetylacetonate (III). The synthesizing method comprises the following steps: a, dissolving ruthenium trichloride hydrate into water to react with alkali to generate ruthenium hydroxide and dissolving by strong acid after washing to remove chlorine ions to obtain a ruthenium salt solution; b, reacting acyl acetone with alkali to obtain acetylacetonate; c, reacting the ruthenium salt solution with the acetylacetonate solution, generating deep red ruthenium acetylacetonate (III) precipitate under the heating condition and purifying by dichloromethane, wherein a yield is 80 to 90%, and a chlorine ion content is smaller than 50ppm. A total reaction equation is shown in a following image, wherein HL is non-coordinating anion strong acid, acac is acetylacetone acid radial which is shown in a following image, and the M is Na or K. The method disclosed by the invention has the advantages that a high yield of the ruthenium acetylacetonate (III) is ensured, a content of impurity chlorine ions is reduced at the same time, product quality is improved and is favorable for industrial production.

The invention relates to polyvinyl chloride cable materials, and particularly relates to an environmentally-friendly 90-DEG C polyvinyl chloride cable insulating material. The environmentally-friendly 90-DEG C polyvinyl chloride cable insulating material is prepared from raw materials such as 2-phenyl-2, 3-diazaspiro [4. 5] decane-1, 4-diketone, 2-(phosphonooxy)acrylic acid-cyclohexanamine (1:1), 1, 3-ketoamine, 1-acetyl-2- imidazolone and ethyl acetopyruvate. The environmentally-friendly 90-DEG C polyvinyl chloride cable insulating material does not contain heavy metals such as lead, cadmium, chromium and mercury greatly damaging peoples and environments and other prohibited substances; the performances of the environmentally-friendly 90-DEG C polyvinyl chloride cable insulating material completely satisfy the requirements of standards on the environmentally-friendly 90-DEG C polyvinyl chloride cable insulating material; and the environmentally-friendly 90-DEG C polyvinyl chloride cable insulating material is suitable for wide popularization and application in polyvinyl chloride cable insulating materials.

The invention discloses a making method of 2-alkoxy-4-oxo-peta-2-alkylene acid ester compound in the organic chemical technical domain, which is characterized by the following: shortening reacting time; improving receiving rate; avoiding three-slag pollution; condensing acetylacetonate and orthoformate in the aliphatic alcohol catalyzed by acid to obtain the product.

Disclosed is a method for providing an anti-corrosion protective coating to a metal substrate that uses a coating composition comprising a resin and a polyfunctional bridging molecule to both bind to the resin and to chelate the bound polymeric resin directly to the metal substrate. One category of polyfunctional bridging molecules preferably includes at least one amine function to bind to a resin and at least one carboxylate, thiol, silane, phenolate, acetoacetonate, imine, phosphate, or phosphonate function to chelate to a metal substrate. It is theorized that the amine function can bind to certain pendent chains in coating resins through a Michael addition reaction while the carboxylate, thiol, silane, phenolate, acetoacetonate, imine, phosphate, or phosphonate functions chelate to the metal substrate. These polyfunctional bridging molecules provide an organic binding of the resin to the metal substrates.