177 results about "Oxime" patented technology

The invention provides an epoxy adhesive solution composition, a preparation method of an epoxy adhesive solution and a modified cellular board. The epoxy adhesive liquid composition comprises the following components in parts by weight: 53-58 parts of epoxy resin, 2-10 parts of a silane coupling agent, 1-10 parts of a curing agent, 1-5 parts of blocked isocyanate and 60-70 parts of water, wherein a blocking group of the blocked isocyanate is selected from hydroxyl, oximido, acylamino, amino, imidazolyl, pyrazolyl or piperazinyl. By introducing the blocked isocyanate with the specific structure, the epoxy adhesive liquid can be subjected to pre-crosslinking reaction in the early drying treatment process, the modulus and high temperature resistance of a formed dry film are improved, and the phenomenon of glue overflow in the subsequent curing stage is inhibited; therefore, the structural integrity and the bonding strength of the adhesive layer in the modified cellular board under the high-temperature condition are improved.

The invention discloses a synthesis method of 9-dichloromethylene-5-amino-benzonorbornene and an intermediate product, the synthesis method comprises the following steps: firstly, synthesizing a cyclization compound 1 as shown in a formula 1 from a cold solution of 6, 6-dichlorofulvene and 1, 4-benzoquinone under the action of a solution of a catalyst I, carrying out oximation reaction on the cyclization compound 1 prepared in the step a and hydroxylamine salt under an alkaline condition, and carrying out post-treatment to obtain the 9-dichloromethylene-5-amino-benzonorbornene. Under the action of a catalyst II, adding the oximate 2 prepared in the step b into a closed container, carrying out hydrogenation reduction to obtain 9-dichloromethylene-5-amino-benzo norbornene, and directly treating the reduction product with acid to obtain 9-dichloromethylene-5-amino-benzo norbornene, namely the 9-dichloromethylene-5-amino-benzo norbornene, namely the 9-dichloromethylene-5-amino-benzo norbornene. According to the method, the cyclization compound is oximated firstly, then the residual carbonyl and two double bonds on the ring are subjected to one-step reduction through catalytic hydrogenation, the working procedure is optimized, meanwhile, reduction by using expensive sodium borohydride is avoided, the method is short in synthesis route and suitable for industrialization, and the production cost is reduced.

This invention provides a dehydrogenation catalyst that enables the production of hydrogen by dehydrogenating formic acid using a continuous process with higher efficiency than conventional methods, as well as a polymer precursor that can optimally form the catalyst and a formic acid dehydrogenation catalyst formed therefrom. [Solution] The polymer precursor has a structure represented by the following general formula (1). TIFF2026073992000060.tif50163 (A and B are independently groups comprising a 5-membered or 6-membered heterocycle or oxime structure which may have substituents, Z is a 5-membered or 6-membered aromatic ligand, M is a Group 8 noble metal element, R 1 R is a hydroxyl group, an alkenyl group or alkynyl group having 1 to 12 carbon atoms, 2 (where is a halogen atom, hydrogen atom, formic acid, or water molecule, X is an anion, and n is a natural number between 1 and 12)

The present application relates to a kind of phenyl-tetrazole oxime derivatives and its preparation method and application, wherein the phenyl-tetrazole oxime derivatives have the structure as shown in formula (I), wherein R 1 , R 2 , T, R a , R b , R c , R d , R e Have the meaning described in the present application;The phenyl-tetrazole oxime derivatives described in the present application have excellent prevention effect on cucumber downy mildew, rice sheath blight, cucumber gray mold, cucumber powdery mildew and the like, and can be further developed as a fungicide for application.

The invention relates to the technical field of organic chemistry, and particularly discloses an amide derivative containing a thiazole oxime structure as shown in a general formula 8 and a preparation method and application of the amide derivative. The derivative shows remarkable antibacterial activity on staphylococcus aureus, escherichia coli, pseudomonas aeruginosa and fluoroquinolone-resistant escherichia coli, particularly has a remarkable effect on gram-negative bacteria, has broad-spectrum antibacterial potential and can be used for preparing drugs for treating related bacterial infection, and the activity of part of compounds is superior to that of a control drug.

The invention provides an aryl alkyl ketoxime derivative as well as a preparation method and application thereof, and relates to the field of aryl oxime derivatives. The preparation method of the aryl alkyl ketoxime derivative comprises the following steps: by taking potassium formate as an additive, carrying out free radical reaction on a compound I and a compound II under ultraviolet irradiation in the presence of tert-butyl nitrite to obtain the aryl alkyl ketoxime derivative, the compound I is substituted iodobenzene or iodopyridine; the compound II is substituted styrene or thienyl ethylene; wherein a hydrogen atom transfer / single electron transfer relay sequence is utilized to activate a compound I, and tert-butyl nitrite is adopted as a bifunctional reagent, and is used as a hydrogen atom transfer reagent and an oxime source. According to the preparation method of the aryl alkyl ketoxime derivative, pre-functionalization is not needed, a reaction substrate is wide in universality and good in compatibility, reaction conditions are mild, operation is easy and convenient, a target product can be efficiently and rapidly prepared on the premise of high yield, and a new way is provided for oxime synthesis.

The problem to be solved is to provide a novel herbicide having both high safety for crops and excellent herbicidal activity against weeds in order to resolve the food crisis that is anticipated to come in the near future due to global population growth. The problem is solved by the compound represented by the following general formula (1): or a salt thereof, an agricultural or horticultural herbicide comprising the compound or the salt thereof as an active ingredient, and a method for using the herbicide.

Disclosed in the present invention are a method and system for preparing an oxime via an ammoximation reaction. The method comprises: (1) mixing a carbonyl compound, ammonia, and a circulating catalyst slurry at a specific feed ratio of the carbonyl compound to the circulating catalyst slurry to obtain a mixed stream, and then bringing the mixed stream into contact with hydrogen peroxide for an ammoximation reaction to obtain a reaction slurry; (2) mixing the reaction slurry with an organic solvent and then performing two-phase separation to obtain an oxime-containing organic phase and a catalyst-containing aqueous phase; (3) optionally, washing the organic phase obtained in step (2) with optional water and then performing separation to obtain an organic solvent and an oxime product; and (4) filtering the aqueous phase obtained in step (2) and then returning same to step (1) to provide at least part of the circulating catalyst slurry. The method and system for preparing an oxime according to the present invention significantly prolong the service life of a catalyst, improve the operating stability of a system, reduce the consumption of catalyst, and improve the quality of the prepared oxime product.

The invention discloses a preparation method of pesticide line thiophene, which comprises the following steps: under protective gas, dissolving benzaldoxime and 2-cyano thiophene in an organic solvent, slowly adding an oxidizing agent at the temperature of 20-30 DEG C, and after the reaction is completed, washing with water, extracting, concentrating and recrystallizing to obtain line thiophene, the oxidizing agent is selected from one or more of diacetoxy iodobenzene, [bis (trifluoroacetoxy) iodine] benzene and potassium peroxymonosulfonate. According to the preparation method of the pesticide line thiophene, the line thiophene is directly and efficiently synthesized through one-step reaction, and the yield is good. Compared with the existing synthesis route, the route is short, the solvent can be recycled and reused, the requirement on equipment is simple and corrosion-free, and a foundation is laid for further pilot scale production.

The application discloses a synthesis method of 5,5-dimethyl 2-isoxazoline. First, isoamyl aldehyde is added with hydrogen chloride to generate chloroisoamyl aldehyde, then under alkaline conditions, the chloroisoamyl aldehyde generated in step one is added with hydroxylamine salt to generate chloroisoamyl aldehyde oxime, finally under alkaline conditions, the chloroisoamyl aldehyde oxime generated in step two is cyclized to generate 5,5-dimethyl 2-isoxazoline, the yield is high, the process is simple and suitable for industrial production; compared with the traditional method, the synthesis method has the characteristics of mild reaction condition, green environmental protection and low cost.

The invention discloses a method for co-production of 2, 4-dichloro-5-fluoroacetophenone and hydroxylamine hydrochloride, and belongs to the technical field of organic chemical industry, 2, 4-dichlorofluorobenzene is used as a raw material, alkylation and reaction with tert-butyl nitrite are performed to generate oxime, and then hydrochloric acid hydrolysis is performed to generate 2, 4-dichloro-5-fluoroacetophenone and hydroxylamine hydrochloride; according to the method, co-production of the 2, 4-dichloro-5-fluoroacetophenone and the hydroxylamine hydrochloride is innovatively realized, not only are high yield and high purity of the target product 2, 4-dichloro-5-fluoroacetophenone ensured, but also the nitrogen element in the reaction is recycled and converted into the hydroxylamine hydrochloride with high additional value, and the atom economy is remarkably improved; according to the method, the operation process is greatly simplified, the use of dangerous reagents is avoided, and the intrinsic safety and environmental friendliness of the process are improved from the source; the method is simple to operate, safe and environment-friendly, the production cost is effectively reduced, and the market competitiveness of the product is enhanced.

The application provides a purification process method and device of a lactam, wherein an oxime is subjected to a rearrangement reaction with a catalyst, the obtained lactam is purified after the rearrangement reaction, and the method comprises the following steps: extracting the lactam by using an extraction solvent to obtain a lactam solution from which the catalyst is separated, performing alkali washing and water washing on the obtained lactam solution to obtain a lactam solution after alkali washing and water washing, performing hydrogenation reaction on the obtained lactam solution again, performing crystallization separation on the lactam solution after hydrogenation to obtain a lactam product crystal, and then performing treatment on the obtained lactam product crystal by means of solvent washing, rectification, distillation or crystallization to obtain the lactam with a purity of greater than or equal to 99.9%.

The invention provides a preparation method of acacia gum nano-composite hydrogel. The preparation method comprises the following steps: S1, mixing an acacia gum aqueous solution with a free radical initiator, and then sequentially adding acrylonitrile, CuFe2O4 nanoparticles and a cross-linking agent into the mixture to obtain the acacia gum nano composite hydrogel. The acacia gum nano-composite hydrogel combines the characteristics of a natural polymer, a synthetic polymer and inorganic nanoparticles, and is an effective adsorbent for removing heavy metals in an aqueous solution, the prepared magnetic hydrogel is treated by hydroxylamine hydrochloride, so that a nitrile group is converted into an amidoxime group to serve as a bidentate ligand, and the adsorption capacity of the hydrogel is improved. The existence of CuFe2O4 in the acacia gum nano-composite hydrogel makes the recoverable magnetic hydrogel possible, the recoverable magnetic hydrogel can be easily removed from an aqueous solution and regenerated, and after three continuous cycles, the recoverable magnetic hydrogel still has high heavy metal adsorption capacity.

This invention relates to the field of chemical analysis technology, specifically to an analytical method for the content of 1,1-dibromoformaldehyde oxime. The method includes the following steps: (1) dissolving the standard and the sample to be tested separately in acetonitrile to prepare standard solutions and sample solutions; (2) setting the analytical conditions of the high-performance liquid chromatograph (HPLC), and after the instrument baseline stabilizes, injecting the standard, sample to be tested, sample to be tested, and standard in sequence, calculating the average peak area of ​​1,1-dibromoformaldehyde oxime in the standard solution and sample solution respectively; (3) calculating the mass fraction of 1,1-dibromoformaldehyde oxime in the sample to be tested according to the external standard method formula. The analytical method of this invention has strong specificity, good precision, high reliability, and good repeatability, and is particularly suitable for the content analysis of 1,1-dibromoformaldehyde oxime products and for mid-control analysis during the synthesis reaction process.

This invention relates to the field of polymer materials technology, and discloses a lignin-based adsorbent modified with a methylamine oxime, its preparation method, and its application. The invention uses lignin enzymatically hydrolyzed solid waste from industrial ethanol production as raw material. Utilizing the phenolic hydroxyl activity of lignin, methylamine oxime functional groups are chemically grafted onto the lignin structure to obtain a lignin-based adsorbent modified with a methylamine oxime. This adsorbent has the advantages of strong stability, high adsorption activity, low cost, and recyclability, enabling the high-value utilization of waste enzymatically hydrolyzed lignin. When the above-mentioned lignin-based adsorbent is used in the treatment of highly acidic uranium-containing nuclear wastewater, the uranium adsorption rate can reach up to 99.9%, which is beneficial for the promotion of lignin-based materials in the industrial application of treating highly acidic nuclear wastewater.

The invention discloses a fluorine-containing ionic type dynamic cross-linked polyurethane elastomer and a preparation method thereof. The fluorine-containing ionic type dynamic cross-linked polyurethane elastomer is prepared from polyether / polyester glycol, a dioximido ion-containing chain extender, isocyanate, a catalyst and a cross-linking agent through in-situ polymerization reaction. According to the invention, an ionic polyurethane covalent adaptive network is prepared through a pre-polymerization-chain extension-cross-linking reaction of a dioximido ion-containing chain extender, polyether, isocyanate, a catalyst and a cross-linking agent. The thermodynamic incompatibility between a soft segment and a hard segment is remarkably improved through the ionic interaction between molecular chains in the network, microphase separation enhancement is promoted, the hard domain serves as a physical crosslinking site to provide strength support, and the soft domain endows the material with flexibility and extensibility; under the action of external force, multiple hydrogen bonds and ions in a hard domain interact to generate dynamic dissociation and association, and a remarkable energy dissipation effect is realized, so that compared with a traditional polyurethane dynamic adaptive network, the polyurethane dynamic adaptive network shows synergistic improvement of strength and toughness, and keeps excellent thermal mechanical stability and environmental resistance in a service environment.

This invention discloses a method for preparing dodecanoic acid lactam, comprising an oximation reaction of cyclododecanone, a rearrangement reaction of cyclododecanone oxime, and extraction and purification. The oximation reaction of this invention uses a cobalt-based MOF catalyst, which has high catalytic activity and can significantly improve the conversion rate of the cyclododecanone oximation reaction, thereby improving the overall reaction efficiency, reducing the formation of by-products, and thus improving the purity of the target product. In the rearrangement reaction of cyclododecanone oxime, zirconium oxide sulfate is used as a catalyst. This catalyst has good catalytic performance under high temperature conditions and can effectively promote the rearrangement reaction. Simultaneously, the ionic liquid is used as a solvent, which not only has good solubility but is also environmentally friendly and easy to recycle, reducing production costs and environmental impact.

This invention relates to a phosphate-containing chiral diastereomeric oxime ester compound, its preparation method, and its applications, belonging to the field of organic synthesis technology. This invention introduces a chiral center at a specific location in the molecular structure of the oxime ester compound to form a mixture of diastereomeric stereoisomers. The introduction of the chiral center interferes with intermolecular chiral recognition, thereby effectively suppressing the π-π stacking effect and crystal growth between the aromatic ring cores. Furthermore, the introduction of the phosphate ester structure into the product effectively improves its solubility in propylene glycol methyl ether acetate or cyclohexanone solvents. The photocurable ink prepared using the diastereomeric oxime ester compound of this invention exhibits excellent storage stability and better photosensitivity.

The invention provides a polymer compatilizer and application thereof, and relates to the technical field of organic materials. Specifically, a molecular chain of the polymer compatilizer comprises a polyolefin chain segment, a reversible covalent bond group and an active functional group which are connected in sequence; wherein the reversible covalent bond group comprises at least one of a cycloaddition reaction system, a disulfide bond system, a borate bond system, an acylhydrazone bond system, an oxime bond system, a trithiocarbonate bond system and a tetrazole-olefin light click chemical system. According to the compatilizer structure, a dynamic covalent cross-linked network can be constructed at the interface of the composite material, and the interface is endowed with an intelligent response characteristic through fracture and recombination of reversible covalent bonds, so that the interface bonding strength of the composite material is far higher than that of a traditional system; the technical problems that in the material service process in a traditional system, due to permanent covalent bonding, an interface is prone to being damaged and cannot be reversibly repaired are effectively solved.

To provide an improved ink-jet adaptive planarization material that provides a planar cured layer having high thermal stability.SOLUTION: A photocurable composition can include a polymerizable material and at least one photoinitiator, wherein the polymerizable material includes at least one multifunctional vinylbenzene monomer in an amount of at least 30 wt -%, based on the total weight of the polymerizable material, and wherein the at least one photoinitiator includes an oxime ester compound. The photocurable composition can be adapted to have a UV shrinkage of 4.0% or less after forming a photocurable layer at 23 °C. and a thermal shrinkage of 3.5% or less after baking the photocurable layer at 350 °C.SELECTED DRAWING: None

Disclosed in the present invention are a method and system for the ammoximation of carbonyl compounds. The method comprises: (1) bringing a reactant stream containing a carbonyl compound, ammonia and hydrogen peroxide into contact with a catalyst to perform an ammoximation reaction, so as to obtain a product stream; (2) mixing the product stream with an organic solvent, and then simultaneously performing extraction and filtration under perturbation conditions, so as to obtain wastewater and a mixture stream; and (3) separating the mixture stream to obtain an oxime-containing organic phase and a catalyst-containing aqueous phase, and returning the catalyst-containing aqueous phase to step (1) to supply at least part of the catalyst. By means of the method and system for the ammoximation of carbonyl compounds provided by the present invention, on the premise of achieving a high conversion rate of carbonyl compounds and a high oxime selectivity, continuous and efficient separation of wastewater, a catalyst and reaction products can be achieved, the consumption of the catalyst can be reduced, and the operational stability of a device can be improved.

The application provides a kind of acid oxime ratio analysis method of solvent rearrangement reaction product in caprolactam production process, comprising the following steps: S1, the content of sulfuric acid in solvent rearrangement reaction product is detected by potentiometric titration;S2, mixed extraction is carried out with extraction solvent and solvent rearrangement reaction product, the inert organic solvent content in extraction phase is determined by gas chromatography;The inert organic solvent content in water phase is determined by gas chromatography;S3, the acid oxime ratio of solvent rearrangement reaction product is calculated.The application carries out extraction using extraction solvent, extracts organic phase into extraction solvent, then tests the inert solvent content in extraction phase, the interference of inert solvent is excluded when acid oxime ratio is analyzed, the result is more accurate, which is beneficial to control rearrangement effective conversion rate, accurately evaluate rearrangement effect, facilitate process condition adjustment, and provide guidance basis for production.

The invention relates to a benzophenone oxime ester photoinitiator and a preparation method thereof, and the structure of the benzophenone oxime ester photoinitiator compound is as shown in formula (1), specifically as shown in the specification. According to the benzophenone oxime ester photoinitiator provided by the invention, oxime group (= N-OH) and ester group (-COOR) functional groups are introduced, so that the molecular structure of a benzophenone compound is increased, the characteristic that the benzophenone compound serving as the photoinitiator is easy to yellow is improved, the solubility is improved, and meanwhile, the benzophenone oxime ester photoinitiator has the advantages of high curing speed and the like of an oxime ester cracking type photoinitiator.

The application provides a synthesis method of aromatic primary amine compounds and relates to the technical field of organic synthesis. The synthesis method provided by the application comprises the following steps: under the action of a catalyst, aromatic hydrocarbon compounds and ammonium salt are reacted under visible light in a solvent system and a non-oxidizing atmosphere to generate aromatic primary amine compounds; and the catalyst comprises an acridine salt and a cobalt oxime complex. The application realizes primary amination of aromatic hydrocarbons by constructing C(sp 2 )‑N bonds through C‑H bond functionalization, and has the advantages of mild reaction conditions, simple operation, safety and greenness, no need of oxidants, atomic economy and step economy, and conformity to the green development concept.

This invention relates to the field of pharmaceutical intermediates, and in particular to a method for synthesizing chiral indane. The method uses indane as a raw material, synthesizes an oxime, then an enamine, and subsequently synthesizes the trans-chiral indane via an asymmetric hydrogenation reaction using a ruthenium chiral bisphosphine catalyst, achieving high yield and high stereoselectivity. The advantages of this invention are: in the asymmetric hydrogenation reaction of the enamine, the trans-chiral indane is obtained with a content greater than 97%, an ee of 95%, and a yield greater than 90%; the catalyst is readily available; the operation is simple; the raw materials are readily available; there is minimal pollution from waste; and energy consumption is low, making it suitable for industrial production.

The invention provides a high-concentration oxime ester compound solution and application thereof. The invention also relates to preparation of a photocuring composition taking the solution as a photoinitiator component and preparation of a photoresist. The high-concentration oxime ester compound solution contains at least one compound with a structure shown as a formula I and at least one solvent, the mass of the compound shown as the formula I accounts for 50%-95% of the mass of the high-concentration oxime ester compound solution, and the balance is the solvent or other compounds. The high-concentration oxime ester compound solution disclosed by the invention has remarkable use convenience in a photocuring composition formula, especially in a photoresist production process, and the risk that a photoinitiator is possibly separated out in a low-temperature storage process of photoresist is completely eliminated.

The present application relates to a kind of 2-aryl-3-carbonyl-substituted tetrahydrofuran and tetrahydropyran compound preparation method, its reaction general formula is as follows: the present application is prepared by one-pot method under photocatalytic condition 2-aryl-3-carbonyl-substituted tetrahydrofuran and tetrahydropyran compound of unsaturated alcohol, alkyl or aryl acyl oxime ester.The starting material of this method is cheap and easy to obtain, simple operation, mild reaction condition, avoid using the dosage of oxidizing agent and additional reagent, provide a kind of green and efficient preparation method for 2-aryl-3-carbonyl-substituted tetrahydrofuran and tetrahydropyran compound.

Herbicidal formulations include a combination of an active herbicide, in particular, a cyclohexanedione oxime herbi- cide, and a stabilizing surfactant. The herbicidal formulations, for example, have improved storage stability. Methods for controlling weeds with the herbicidal formulations are also provided.

Provided are a negative photosensitive composition and a method for pattern formation using a polyimide-based precursor and an oxime ester-based compound, wherein the composition which leaves no residue after development, accurately implements a pattern with an error of less than 0.5 μm, while the composition which produces residue, shows an error of up to 5 μm and significant residues, demonstrating that the oxime ester-based initiator is effective in reducing residues and improving pattern accuracy.

The invention discloses a synthesis method of limidoterol, and belongs to the technical field of medicine synthesis. The method comprises the following steps: coupling cyclobutanone oxime and a caffeic acid derivative under the catalysis of ferrous acetylacetonate, a chlorobenzene solvent and the protection of nitrogen to obtain a decarboxylated cyanogen alkylation intermediate; oxidizing the intermediate with m-chloroperoxybenzoic acid in dichloromethane in the presence of sodium carbonate to obtain a vicinal diol monoester intermediate; catalyzing by cobalt chloride in methanol, reducing by sodium borohydride, and protecting by Boc2O to obtain a cyclized precursor; cyclizing the precursor in tetrahydrofuran by using sodium hydride to obtain a cyclized intermediate; and performing deprotection to obtain the limiterol. According to the method, dangerous reagents and processes are not used, the safety is high, and no heavy metal residues exist; the cost is low, precious metals are not needed, the post-treatment operation is simple and convenient, a complex purification process is not needed, and the total yield reaches 21%; process conditions are mild, normal pressure and conventional heating modes are adopted, and industrial production is easy to realize.