23 results about "Aromatic ketones" patented technology

The invention provides a method for synthesizing a hydroxyl-protected alpha-hydroxy aldehyde compound by electrically reducing aromatic ketone, which comprises the following steps of: adding aromatic ketone, a formylation reagent, an additive and electrolyte into a reaction electrolytic tank, adding a reaction solvent in an inert gas atmosphere, tightly covering a plug with an electrode, and carrying out electrolytic reaction to obtain the hydroxyl-protected alpha-hydroxy aldehyde compound. And separating and purifying to obtain the hydroxyl-protected alpha-hydroxy aldehyde compound. Clean electrons are used as a reducing reagent, no transition metal residues exist, raw materials are simple and easy to obtain, reaction conditions are mild, and the method has wide substrate universality and high operability, is a green and economical synthesis method, has extremely high potential industrial prospects and has high commercial application value.

The invention discloses an ultraviolet-cured polyurethane bonding material and a preparation method thereof. The ultraviolet-cured polyurethane bonding material comprises the following main components: isocyanate, polyol, trihydroxy polyether, polyester, a resin material, a filler, a catalyst, a modifier, a monomer and a solvent. The phenyl ketone, the aromatic ketone, the benzylidene and the photosensitive resin are added into the ultraviolet curing polyurethane bonding material, so that the ultraviolet curing polyurethane bonding material has relatively high sensitivity and activity, can be subjected to a polymerization reaction quickly under light irradiation, can reduce energy consumption, is good in stability, is convenient to store for a long time, and can be applied to the field of ultraviolet curing. According to the present invention, the initiator has characteristics of no toxicity, no odor and no harm to the human body, the absorption spectrum is matched with the emission band of the radiation light source, the molar extinction coefficient is high, and the phenyl ketone, the aromatic ketone and the benzylidene absorb the light energy, transition to the excitation singlet state and intersystem jump to the excitation triplet state so as to provide the high intersystem jump efficiency of the initiator;

The present application relates to a kind of preparation method of substituted alkylbenzene.The method includes: substituted aromatic ketone flows through catalyst bed and is reacted, the catalyst bed includes: hydrogenation catalytic bed and intramolecular dehydration catalytic bed of alternative arrangement, and the first section and the last section of the catalyst bed are hydrogenation catalytic bed;The reaction is carried out in the presence of non-alcohol solvent.The present application is in the presence of non-alcohol solvent, using substituted aromatic ketone is synthesized in the catalyst bed with hydrogenation catalytic bed and intramolecular dehydration catalytic bed of alternative arrangement, and the first section and the last section of the catalyst bed are hydrogenation catalytic bed, substituted alkylbenzene, with the advantages of high reactant conversion, high selectivity of product substituted aromatic ketone, simple post-processing.

The invention provides a synthesis method of benzyl oxygen-18 labeled aromatic aldehyde or aromatic ketone, and relates to the technical field of organic chemical synthesis. In an inert atmosphere, a benzyloxy-18-labeled aromatic aldehyde or aromatic ketone is obtained by dissolving a benzyloxy-18 substrate, an electrolyte, an alkaline additive and oxy-18 water in an organic solvent, carrying out an electrochemical oxidation reaction and then carrying out separation and purification. According to the method, a green electrochemical strategy is adopted, no transition metal participates, the reaction conditions are mild (normal temperature and normal pressure), the oxygen isotope labeled aromatic aldehyde or aromatic ketone compound is directly synthesized in one step without pre-synthesizing an aldehyde / ketone precursor, the substrate application range is wide, various substituent groups such as halogen, alkyl and aryl can be compatible, and the method is suitable for industrial production. And electron-deficient aldehyde ketone which is difficult to mark by a traditional method can be synthesized. The synthesized product can be used in the fields of drug metabolism research, environment tracking and the like, and has the advantages of step economy, green synthesis and industrialization potential.

The invention belongs to the technical field of organic synthetic chemistry, and discloses a preparation method of an aromatic ketone compound, which comprises the following steps: by taking an unsaturated carbonyl compound obtained by condensing aryl acetaldehyde / acid and aldehyde / ketone molecules as a precursor, carrying out a reaction on the unsaturated carbonyl compound in the presence of a free radical precursor and molecular oxygen under the conditions of illumination and / or heating to obtain the aromatic ketone compound. And carrying out free radical mediated decarbonylation functionalization reaction in an organic solvent to obtain the aromatic ketone compound. The functional group contained in the free radical precursor is introduced to the alpha position of the ketone compound. By improving reaction participants and a reaction mechanism, the aromatic ketone compounds with various structures can be efficiently and highly selectively constructed in one step, the functionalization of the alpha position of the aromatic ketone compounds is synchronously realized, and the preparation method which is simple and convenient to operate, high in atom economy, green and environment-friendly is provided for the aromatic ketone compounds; the obtained compound is especially applicable to the fields of drug synthesis and synthesis of other materials.

This invention relates to the field of high-performance thermoplastic composite materials, and in particular to a method for preparing polyaryletherketone resin. The method includes the following steps: under a non-oxidizing atmosphere, a dihydroxy aromatic monomer containing a bisphenol structure, a dihalogenated aromatic monomer containing a nitrile group, and a dihalogenated aromatic ketone monomer containing a difluorine substituted group are reacted in a polar solvent system with a boiling point above 150°C in the presence of an alkali metal carbonate to form the corresponding phenolate; an aromatic hydrocarbon dehydrating agent is added to the system for azeotropic dehydration to remove water generated during the reaction and promote the formation of the phenolate; a nucleophilic substitution polycondensation reaction is carried out at a higher temperature; during the polycondensation reaction, a capping agent is added to regulate the end-chain structure and molecular weight distribution, wherein the capping agent is 2,4′-difluorobenzophenone; after the reaction is completed, the reaction product is separated and purified to obtain the polyaryletherketone resin.

The present invention provides a method for preparing 1,4-naphthoquinone compounds by selective oxidation of aromatic ketones, which is a new method for catalytic oxidation of aromatic ketones to prepare 1,4-naphthoquinone compounds using copper-based and vanadium-based heterogeneous catalytic materials, belonging to the technical field of fine chemicals. This method uses molecular oxygen as the oxidant, and a heterogeneous copper-based and vanadium-based catalytic material to prepare 1,4-naphthoquinone compounds by liquid-phase selective oxidation of aromatic ketones under mild conditions. The Cu-N-C and V-N-C composite materials used therein are obtained by mixing inorganic metal salts with organic nitrogen-containing compounds to obtain a precursor, and calcining in an inert atmosphere at a temperature of 300-800 °C for 0.5-10 h. The method provided by the present invention uses aromatic ketones as raw materials and molecular oxygen as the oxidant, and the catalytic reaction conditions are mild with few pollutants. It is a new route for preparing 1,4-naphthoquinone compounds, with strong practicability and broad application prospects.

This invention discloses a nickel oxide-doped manganese dioxide catalyst, its preparation method, and its application. The catalyst is prepared by in-situ growth of nickel oxide-doped manganese dioxide on a carbon felt substrate using a solvothermal method. In the application, the catalyst electrode is used as the anode, and an aromatic compound is dissolved in an acidic solution as the anolyte. A counter electrode is used in the cathode chamber, and an acidic solution is used as the cathode reaction solution. After the reaction, an aromatic aldehyde or aromatic ketone can be obtained through a post-treatment process. The catalyst of this invention has a high surface area and porous structure, which increases the specific surface area of ​​the electrode, providing a large number of reaction sites and active sites for the oxidation of the substrate. In addition, the doping of nickel oxide provides more active sites for manganese dioxide, promoting the formation of intermediates and also promoting the desorption of the aromatic aldehyde product, preventing the formation of aromatic acids due to over-oxidation. Furthermore, the nanorod-like three-dimensional structure of the catalyst is beneficial for mass transfer.

A method for producing an aromatic ketone represented by formula (1), said method comprising a reaction step in which a compound represented by formula (2) is reacted in the presence of a sulfonic acid to obtain the aromatic ketone, wherein the sulfonic acid includes at least one sulfonic acid selected from the group consisting of C1-3 alkyl sulfonic acids and C1-3 fluoroalkyl sulfonic acids. (In formulas (1) and (2), R1 and R2 each independently represent a C1-6 hydrocarbon group.)

The present invention belongs to the field of pesticide technology, and in particular refers to a preparation method and application of a carbonate oxime ester compound, in order to solve the technical problems of high synthesis cost and greater environmental damage in the oxime ester synthesis process. By dissolving an aromatic ketone oxime compound, an azo compound and a metal salt in a solvent, a carbonate oxime ester compound is obtained after reacting at 90-110°C for 1-3h. The prepared carbonate oxime ester compound is a useful chemical and pharmaceutical intermediate, and also has very important applications in biological activity as an effective bactericide. The present invention realizes the esterification of aromatic ketone oxime compounds under mild and green reaction conditions, and provides a convenient and efficient method for the esterification of aromatic ketone oxime compounds. At the same time, a series of prepared carbonate oxime ester compounds are tested for their inhibitory activity against plant fungi, and novel and efficient compounds with spectral bactericidal effects are screened out, providing active compounds with novel structures for the development of new green pesticides.

This invention belongs to the field of acidizing technology in oil and gas field development, and discloses a Mannich base quaternary ammonium salt corrosion inhibitor for ultra-high temperature well acidizing and its preparation method. The corrosion inhibitor is composed of 35%~55% by mass of a novel Mannich base quaternary ammonium salt, 30%~60% by mass of an organic solvent, and 5%~15% by mass of a corrosion inhibitor synergist. The novel Mannich base quaternary ammonium salt has a specific molecular structure and is synthesized by reacting modified aromatic aldehydes, aromatic ketones, and organic secondary amines. Its molecular skeleton incorporates rigid groups and long-chain hydrophobic groups, which can form a dense adsorption film on the metal surface and significantly improve thermal stability. The corrosion inhibitor of this invention exhibits excellent corrosion inhibition performance in an ultra-high temperature acidic environment of 200℃, solving the problems of easy decomposition and non-dense adsorption film of existing corrosion inhibitors at high temperatures.

The application discloses a method for preparing aryl deuterated methane compounds by deoxygenation and deuteration of a hydrophilic carbon loaded catalyst, and relates to the technical field of fine chemical synthesis. The method comprises the following steps: taking aromatic aldehyde or aromatic ketone compounds as raw materials, heavy water as a deuterium source, a hydrophilic carbon loaded noble metal as a catalyst, and a non-polar organic reagent as a solvent, and preparing aryl deuterated methane compounds by deoxygenation and deuteration under a hydrogen reaction atmosphere. Compared with traditional deoxygenation and deuteration technology, the method has the following advantages: the reaction is a heterogeneous catalytic reaction, the reaction condition is mild, the reaction substrate and the deuterium source are cheap and easy to obtain, the hydrophilic carbon loaded catalyst used can significantly improve the yield of the target product and the deuterium content in the methyl functional group compared with a conventional activated carbon loaded catalyst, and the polar surface of the carrier is beneficial to the removal of the non-polar aryl deuterated methane compound product, and the catalytic efficiency and product recovery can be improved.

The invention discloses a method for synthesizing Schiff base 2-aniline by using calcium carbide as a mediator, which is characterized in that aromatic ketone is used as an initial raw material and is synthesized through two-step reaction: firstly, the aromatic ketone reacts with p-methyl benzenesulfonyl hydrazide to synthesize aromatic ketone p-methyl benzenesulfonyl hydrazone, and the aromatic ketone p-methyl benzenesulfonyl hydrazone reacts with p-methyl benzenesulfonyl hydrazone to synthesize Schiff base 2-aniline; and secondly, reacting the aromatic ketone p-toluenesulfonyl hydrazone with p-phenylenediamine, sodium tert-butoxide, calcium carbide and maleic anhydride to synthesize the Schiff base 2-aniline. According to the new method for synthesizing the 2-((1-arylethyl) amino) aniline Schiff base by taking calcium carbide (calcium carbide) as a key mediating agent, the purposes of low cost, high yield, simplicity and convenience in operation and good functional group tolerance are achieved.

Embodiments of the present invention relate to compositions that can be used as emulsifiable concentrates in the agriculture industry. In one aspect, a composition comprises (a) 5 weight percent or more of a compound soluble in at least one of N,N-dialkyl fatty amide, an aromatic ketone, an alkyl ketone, a cyclic ketone, or an aromatic hydrocarbon solvent; and (b) an ether ketone solvent according to Formula 1, as described herein, wherein R1 is a linear or branched alkyl group having 4 to 8 carbon atoms, wherein R2 is CH3 or CH2CH3, wherein x is 0, 1, or 2, wherein R3 is CH3 when R2 is CH3, and wherein R3 is CH2CH3 when R2 is CH2CH3.

The application discloses a method for producing ethylene cracking raw material by hydrocracking. The method is a one-stage series hydrocracking process, which comprises the following steps: a hydrocracking reactor is fed with a hydrocracking feedstock in an upward feeding mode, a material P is introduced into the hydrocracking reactor between a hydrocracking catalyst bed and a post-hydrorefining catalyst bed, the product obtained from the hydrocracking reactor is first subjected to air cooling, the material P in the product is taken out of the reaction system by water phase through the method of water injection in the air cooling device, the oil phase after air cooling is separated and fractionated to obtain light naphtha, heavy naphtha, aviation kerosene, diesel oil and tail oil fraction, and the tail oil fraction is used as the raw material for producing ethylene by steam cracking; the material P is one or more of C23-C35 phenols, aromatic alcohols, aromatic aldehydes, aromatic ketones and aromatic esters. The method can improve the quality of the tail oil product under the condition of producing the tail oil in the hydrocracking device, so as to prolong the operation cycle of the ethylene cracking furnace.

The application discloses a hydrocracking method for improving color stability of special oil. The method is a one-stage series hydrocracking process, wherein a hydrocracking catalyst bed and a post hydrofining catalyst bed are arranged in sequence along the liquid phase material flow direction in a hydrocracking reactor, and the method comprises the following steps: a wax oil raw material is sequentially introduced into a hydrofining reactor and a hydrocracking reactor, and the obtained product is separated and fractionated to obtain an industrial white oil fraction; wherein, a material P is introduced between the hydrocracking catalyst bed and the post hydrofining catalyst bed, the material P is one or more of C17-C22 phenols, aromatic alcohols, aromatic aldehydes, aromatic ketones and aromatic esters; an air cooling device is arranged before fractionation of the obtained product, wherein the air cooling device is water injected so that the material P in the product is taken out of the reaction system by the water phase. The method can improve the color stability of the special oil under the condition that the hydrocracking device is mainly used for producing the special oil.

The invention discloses a polymer modified Pd / C catalyst preparation method, which comprises: S1, adding a Pd / C catalyst, a monomer, a cross-linking agent and an initiator into an organic solvent, and uniformly mixing to obtain a first mixture; and S2, carrying out in-situ illumination polymerization reaction on the first mixture, cooling to room temperature after the reaction is finished, and carrying out centrifugal washing and drying treatment on the precipitate to obtain the polymer modified Pd / C catalyst. A Pd / C catalyst is subjected to surface modification by adopting a polymer through an in-situ photopolymerization method, and an adsorption configuration of a substrate on the surface of the catalyst is regulated and controlled by utilizing a confinement effect generated by a polymer layer, so that high-selectivity and high-conversion-rate preparation of the alkylphenol derivative is realized under a mild condition.

A composition, preferably for caring for keratin materials, comprising (i) at least one non-ionic polysaccharide selected from homopolymers of mannose, copolymers of mannose and glucose, copolymers of mannose and galactose, and a combination thereof; (ii) at least one ionic polysaccharide selected from xanthan gum, carrageenan, gellan gum, and a combination thereof; and (iii) at least one preservative selected from chlorophenyl glyceryl ethers, aromatic ketone compounds, and a combination thereof, wherein the weight ratio of the at least one non-ionic polysaccharide to the at least one ionic polysaccharide is at least 1: 5. A composition above can be used in a non-therapeutic process for caring for keratin materials.

A decarboxylation coupling electrocatalysis method for catalyzing an aromatic trimethyl ammonium salt and α-nickel ketonate is provided. The method includes the following steps: step 1, adding aryl-ammonium trifluoromethyl sulfonate, α-keto acid and sodium acetate in a molar ratio of 1:2:2 into a reaction bottle in a nitrogen atmosphere, adding an electrolyte n-Bu4NBF4, and then adding a mixed solution of acetonitrile and N,N-dimethylformamide, where a volume ratio of the acetonitrile to the N,N-dimethylformamide is 1:4; and step 2, stirring a mixture in step 1 so as to dissolve the mixture, inserting two electrodes, using a graphite electrode as a positive electrode and a nickel electrode as a negative electrode, adding water for stirring after a reaction, and conducting extraction, drying and purification to obtain an aromatic ketone compound.

The present invention provides an ionomer based on a flexible main chain, an anion exchange membrane and a preparation method thereof. The preparation method of the anion exchange membrane includes: mixing 1,7-dichloro-4-heptanone with a trimethylamine solution in a first organic solvent to obtain N1,N1,N1,N7,N7,N7-hexamethyl-4-oxoheptane-1,7-diammonium chloride; mixing it with a hydroxyl-containing all-carbon flexible polymer main chain, an aromatic aldehyde and / or an aromatic ketone in the presence of a second organic solvent and a catalyst to obtain an ionomer based on a flexible main chain; mixing the ionomer based on a flexible main chain with a third organic solvent, drying the mixture into a film, and soaking the film in an alkali solution to obtain an anion exchange membrane with hydroxide as the anion. The ionomer based on a flexible main chain and / or the anion exchange membrane prepared by the present invention have the characteristics of excellent mechanical properties, high ionic conductivity, low swelling rate, high antioxidant stability, high alkali resistance stability, as well as high fuel cell performance and water electrolysis performance.

The application discloses a method for selective oxidation of aromatic compounds to aromatic ketones. Oxygen is used as an oxidant to achieve selective synthesis of aromatic compounds to corresponding ketones in a heterogeneous catalytic system. The catalytic process utilizes the synergistic catalysis of two catalysts on the reaction, and realizes rapid oxidation of aromatic compounds without the need of alkaline additives. The product distribution obtained by the method is simple and easy to separate, reduces environmental pollution, and is a green production process, which has important practical application value for promoting sustainable development.

The application provides an application of a strain of Tolypocladium inflatum ZJPH2105 in preparing a chiral aromatic alcohol through asymmetric reduction of an aromatic ketone. The product obtained through catalysis of the strain of Tolypocladium inflatum ZJPH2105 has an e.e. value of greater than 99.9%, the strain is green and safe, easy to cultivate, and rich in source, and the conversion process does not need to add expensive coenzyme, and has the characteristics of low cost, green and environment-friendly conversion process and the like. The application uses the strain of Tolypocladium inflatum ZJPH2105 as a biological catalyst to reduce 4'-bromo-2,2,2-trifluoroacetophenone, when the substrate concentration is 10 mM, the yield of the target product (S)-1-(4-bromophenyl)-2,2,2-trifluoroethanol can reach 98.2%, and the e.e. value is greater than 99.9%.

Disclosed in the present invention is a method for synthesizing an unsaturated ketone or aromatic ketone compound. The method comprises: at a certain temperature, by using an unsaturated hydrocarbon or aromatic hydrocarbon as a starting material and a N-hydroxyimide compound as a catalyst, adding an organic solvent to dissolve same, then introducing oxygen or air into the reaction solution under light irradiation to carry out an oxidation reaction, and performing workup and separation to obtain the unsaturated ketone or aromatic ketone. The method of the present invention uses air, oxygen-enriched gas or oxygen as a harmless oxidant and light as an energy source to promote the reaction, and therefore has the advantages that the reaction process is green and efficient and low-cost, the usage amount of the catalyst is small, and most of the catalyst is recyclable. In addition, the method of the present invention does not require the participation of reagents such as heavy metals, photocatalysts and hypervalent iodine oxidants and thus has high atomic economy.