210 results about "Benzaldehyde" patented technology

The invention provides a preparation method of an omariglitazone intermediate, which comprises the following steps: by taking p-halogenated benzaldehyde as a raw material, carrying out aldol condensation reaction, hydrolysis, decarboxylation, reduction, ring closing and the like to obtain an intermediate as shown in a formula 9, carrying out catalytic reaction, reduction reaction, ring closing and the like to obtain an intermediate as shown in a formula 13, and finally hydrolyzing to obtain a target product omariglitazone intermediate A. According to the invention, links of precious metal use and chiral resolution (key steps influencing cost and yield) in the prior art are avoided, and a method for synthesizing a single configuration through a chemical method is adopted, so that the yield is greatly improved, and the production cost is greatly reduced; meanwhile, a synthesis route is broken through, a target product is synthesized through cheap initial materials, and post-treatment is simpler and more controllable.

The invention discloses long-acting high-dynamic hydrazone bond hydrogel as well as a preparation method and application thereof, and particularly relates to the technical field of biomedical materials. The preparation method comprises the following steps: taking 1-adamantane acetic acid and adipic dihydrazide modified sodium hyaluronate and benzaldehyde-terminated eight-arm polyethylene glycol as carrier raw materials; the hydrazone bond hydrogel with relatively high stability is prepared through a coupling reaction of an aldehyde group of benzaldehyde-terminated eight-arm polyethylene glycol and a hydrazide group of 1-adamantane acetic acid and adipic dihydrazide modified sodium hyaluronate. The beta-cyclodextrin modified m-phenylenediamine catalyst is dynamically combined into the carrier through reversible host-guest complexation between beta-cyclodextrin and 1-adamantane acetic acid, so that the long-acting high-dynamic hydrazone bond hydrogel is obtained, and the requirement of three-dimensional culture of stem cells on mechanical properties can be met; and network dynamics can be maintained for a long time, so that stem cell spreading is supported, mechanical signal transduction is activated, osteogenesis-related gene expression is promoted, and stem cell osteogenesis differentiation capability is enhanced.

This invention relates to iron single-atom composite catalysts with a double-layered carbon dot core-carbon-nitrogen shell structure and their applications. The catalyst preparation method is as follows: carbon source, nitrogen source, and iron metal salt are dispersed in a mixed solution of solvent and coordinating agent and stirred evenly, followed by hydrothermal reaction; after the reaction, the supernatant is filtered and dialyzed, and the dialysate is freeze-dried to obtain Fe. SA / CDs material; add zinc nitrate hexahydrate and iron metal salt to deionized water, add Fe SA / CDs aqueous solution, then add the solution of 2-methylimidazole completely dissolved in deionized water, ultrasonically stir, and after the reaction, obtain Fe. SA / CDs / Fe@ZIF-8 precursor; the precursor was subjected to Joule heat treatment and cooled to room temperature to obtain an iron single-atom composite catalyst with a bilayer carbon dot core-carbon-nitrogen shell structure. This invention effectively improves the catalytic activity and stability of the catalyst in the benzaldehyde oxidative nitrification reaction.

The invention discloses a high performance liquid chromatography analysis method for trace impurity content in an organic amine catalyst, and relates to the field of organic catalyst content analysis. Comprising the following steps: pretreating an organic amine catalyst sample, preparing a urea standard solution, performing HPLC (High Performance Liquid Chromatography) analysis and performing quantitative analysis by an external standard method, namely performing derivatization reaction on urea and benzaldehyde under an acidic condition, and successfully converting urea without ultraviolet absorption into dibenzylidene urea (DBU) with strong ultraviolet absorption, the technical blank of direct detection of urea is effectively filled, and the method is adaptive to a conventional ultraviolet / visible light detector to realize accurate detection. And the method has relatively high practical popularization and application values. The method has the advantages of being good in separation effect, high in sensitivity, easy and convenient to operate, high in reproducibility and the like, and can be widely applied to qualitative and quantitative analysis of various trace impurities in the organic amine catalyst.

The invention belongs to the technical field of synthesis of organic compounds, and particularly relates to a synthesis method of hydroxyl-substituted benzaldehyde, which comprises the following steps: in an organic solvent, carrying out catalytic oxidation reaction on a reaction system containing methyl-substituted phenol, an alumina-supported cobalt-copper-rare earth metal oxide catalyst and oxygen-containing gas, the hydroxyl-substituted benzaldehyde is obtained; the catalyst is cheap, easy to obtain and recyclable, and a large amount of alkali and acid are not used in the reaction process, so that the production cost can be more effectively reduced. And secondly, the catalytic oxidation reaction based on the oxidant and the catalyst is mild in reaction condition, good in reaction selectivity and free of additional pollution waste, a target product with relatively high purity and yield can be obtained through simple post-treatment after the reaction, and the green and environment-friendly properties are good. In a word, based on the synthesis method, the hydroxyl-substituted benzaldehyde is synthesized more economically, more environmentally friendly and more efficiently.

The invention discloses a process method for co-production of caprolactone and 2, 4-dimethyl benzoic acid. According to the method, cyclohexanone is taken as a raw material, oxygen is introduced as an oxidant, 2, 4-dimethyl benzaldehyde is added as a pro-oxidant, and caprolactone and 2, 4-dimethyl benzoic acid are generated through oxidation reaction. According to the technological method, oxygen and 2, 4-dimethyl benzaldehyde are used as a co-oxidation system, in the presence of the carbon framework material loaded Ti-based catalyst, cyclohexanone can be subjected to oxidation reaction under mild conditions to generate caprolactone, the reaction is safe and efficient, the selectivity of the product caprolactone and the co-product 2, 4-dimethyl benzoic acid is high, the raw material conversion rate is high, and the method is suitable for industrial production. The product yield can be obviously improved, and the economic applicability is good.

The invention discloses a double-response controlled-release hydrogel for promoting wound healing of astaxanthin and an amino small molecule drug as well as a preparation method and application of the hydrogel, and belongs to the field of biomedical materials. The material is composed of a drug-loaded nano-micelle and a self-healing hydrogel network. Hydrophilic modification of astaxanthin and dynamic coupling of the astaxanthin and an amino small molecule drug are achieved through an astaxanthin-polyethylene glycol-benzaldehyde intermediate, and the drug-loaded nano-micelle has the pH response drug release capacity; the hydrogel network is formed by crosslinking phenylboronic acid modified carboxymethyl chitosan and dopamine through dynamic phenylboronic acid ester bonds, and has ROS responsiveness and self-healing characteristics; the multifunctional intelligent wound dressing can intelligently respond to high ROS and acidic pH microenvironment of chronic wounds, controllably release astaxanthin and amino-containing small molecule drugs, synergistically remove ROS, improve cell oxidative stress, inhibit inflammation, promote blood vessel and tissue regeneration and accelerate chronic wound healing, is excellent in self-healing performance and biocompatibility, and is an ideal multifunctional intelligent wound dressing.

The application discloses preparation of carbazolyl 3,5-dicyanopyridine derivatives, room temperature phosphor and anti-counterfeiting performance thereof. The preparation method comprises the following steps: adding ortho-, meta- or para-carbazolyl benzaldehyde and malononitrile into a reaction bottle, stirring and reacting under room temperature conditions with sodium hydroxide as a catalyst and anhydrous methanol as a solvent, and obtaining ortho-, meta- or para-carbazolyl 3,5-dicyanopyridine by separating and purifying the reaction crude product. Crystals of the three compounds are obtained by a solvent diffusion method with dichloromethane-petroleum ether as a solvent, and the crystal state room temperature phosphor material is obtained. The crystals are doped with urea / triphenylphosphine at a weight ratio of 1:100, the doped crystals are uniformly ground and mixed, and then heated to be molten, so that the host-guest doped phosphor material is obtained, and the novel material is used in the field of anti-counterfeiting patterns.

The invention relates to the technical field of organic synthesis, in particular to the field of IPC C07D239, and more particularly relates to a synthesis method of a phenyl isoxazoline compound. Comprising the following steps: step 1, using a benzaldehyde compound as an initial raw material, and reacting with hydroxylamine hydrochloride to generate a benzaldoxime compound; 2, carrying out a chlorination reaction on the benzaldoxime compound generated in the step 1 and liquid chlorine through a microchannel reactor to generate a chlorinated benzaldoxime compound; and 3, carrying out ring closing on the chlorobenzaldoxime compound generated in the step 2 and an alkene compound to obtain the phenyl isoxazoline compound. A metal catalyst is not used in the preparation method, so that the solid waste treatment cost is reduced; in the step 2, a continuous flow reaction technology of a microchannel reactor is adopted, the reaction time is shortened, compared with a kettle type intermittent process, the productivity is greatly improved, and the reaction safety is higher.

The application discloses a kind of photoresponsive self-repair antibacterial nylon materials and preparation method thereof.The material is modified nylon 6 polymer, aromatic Schiff base dynamic imine bond generated by condensation reaction of carboxyl benzaldehyde and p-phenylenediamine is embedded in its molecular main chain, which gives the material the ability of light-triggered self-repair without external heat source, and unexpectedly improves the mechanical properties and thermal stability of the material, the molecular chain end is bonded with antibacterial organic acid through amide bond, and the antibacterial organic acid is 2-methyl-4-(trifluoromethyl) thiazole-5-carboxylic acid.The preparation method adopts one-pot two-stage polymerization, after pressure opening ring prepolymerization, pressure relief vacuum is carried out to carry out deep condensation and end-capping, and the product is obtained by extrusion granulation and drying.The material can realize room temperature self-repair under natural light, and the antibacterial component is non-dissolution fixed.The application process is simple, the performance is adjustable, and can be used in the field of intelligent packaging, repairable antibacterial coating and biomedical materials.

The application provides a preparation method of a benzaldehyde aniline compound and relates to the technical field of organic synthesis. The preparation method provided by the application comprises the following steps: in a solvent, with an alkali as a promoter, under an atmosphere with an oxygen concentration of 20v100%, the temperature of a reaction system is controlled to be 50-70 DEG C, a diphenyl ketone compound I is reacted with an aniline compound II to generate a benzaldehyde aniline compound III, and the reaction product is subjected to column chromatography separation to obtain a pure benzaldehyde aniline compound III. The method has the beneficial effects that the reaction is simple, green and environment-friendly, the use of an expensive transition metal catalyst is avoided, the reaction condition is mild and controllable, and an environment-friendly byproduct is generated.

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 invention provides a preparation process of (2E)-(3-hydroxy-4-methoxyl) cinnamyl aldehyde. The preparation process comprises the following steps: (1) adding 3-hydroxy-4-methoxyl benzaldehyde into an alkaline aqueous solution, and dissolving the 3-hydroxy-4-methoxyl benzaldehyde for later use; (2) introducing the solution obtained in the step (1) into a first inlet of a continuous flow reactor, wherein the flow velocity is 150.0-220mL / min; a vinyl acetate or acetaldehyde solution is introduced into a second inlet of the continuous flow reactor, the flow velocity is 10-30 mL / min, the retention time of the reaction solution in the continuous flow reactor is 5-10 min, and the reaction temperature is 50-100 DEG C; (3) adding reaction liquid of the continuous flow reactor into a reaction kettle for quenching under stirring; (4) after reaction quenching, filtering and collecting a precipitated solid crude product; (5) refluxing the obtained crude product in methanol, cooling, filtering and collecting the separated solid; and drying in vacuum until the weight is constant to obtain the (2E)-(3-hydroxy-4-methoxyl) cinnamyl aldehyde. According to the process, generation of dark impurities is avoided, the appearance quality and yield of the product are improved, continuous flow reaction is adopted, amplification is easy, and the amplification effect is avoided.

This invention discloses a method for synthesizing a key intermediate of cefdil, belonging to the field of pharmaceutical synthesis. Specifically, the method uses 2-chloro-3,4-dihydroxybenzaldehyde and 4-methoxybenzyl chloride as raw materials, and N,N-dimethylformamide as a solvent. The reaction is carried out under heating in the presence of a catalyst and a base. After the reaction is complete, hot water is added dropwise to the reaction solution, causing a solid to precipitate. The precipitated solid is then filtered, washed with water, and dried to obtain the product 2-chloro-3,4-bis((4-methoxybenzyl)oxy)benzaldehyde. This invention features a green and environmentally friendly synthesis process, simple operation, and convenient product purification. The obtained product has high yield and purity, with a liquid phase purity of 99.4% and a yield of 95.8%.

This invention relates to the field of oilfield chemical additives technology, and discloses a method for preparing a 1-benzyl-10-phenylpyrrolo[1,2-a:3,4-b']dipyrazine-1-onium type quaternary ammonium salt high-temperature acidizing corrosion inhibitor. The method uses 2,2'-piperazine as the starting material, which undergoes a quaternization reaction with benzyl bromide to obtain a quaternary ammonium salt intermediate. The obtained intermediate undergoes an oxidative cyclization reaction with benzaldehyde and manganese dioxide in a dichloromethane system. After separation, drying, and purification, the target product is obtained. The preparation process of this invention is simple and easy to control, the product is easy to purify, and it is suitable for industrial production. It exhibits good synergistic effects with additives, excellent water solubility and compatibility, can stabilize and protect steel, reduce construction risks, and is suitable for various high-temperature acidizing operations.

The invention discloses an odorless scratch-resistant elastic bending UV (ultraviolet) excimer skin-touch varnish, which relates to the technical field of coatings and comprises the following components in percentage by mass: 10-30% of functional acrylate resin, 10-30% of a solvent, 10-30% of a solvent, 10-30% of a solvent and 10-30% of a solvent. 40 to 80% of modified polyurethane acrylate resin; 0.1-1% of a leveling agent; 0.1-1% of a defoaming agent; 0.1-4% of an organosilicon auxiliary agent; 0.5 to 2% of 2, 4, 6-trimethylbenzoyl diphenyl phosphine oxide; 0.5 to 7% of 2-hydroxy-4 '-(2-hydroxyethoxy)-2-methyl propiophenone, and the balance of water; 0.3-1% of a wetting dispersant; 2-5% of UV anti-settling slurry; 1-5% of wax powder; and 5-30% of nano sol. According to the UV quasi-molecular skin-touch varnish disclosed by the invention, through the combined action of an odorless resin system, fluorosilicone modified and enhanced three-functional-group elastic resin, nano-zirconia phase change toughening and a crosslinkable fixing auxiliary agent, multiple pairs of performance contradictions of elasticity and hardness, instant effect and durability, odorless effect and stability and the like in a traditional elastic bending UV coating are successfully solved; and the high-performance skin-touch coating with excellent elastic bending property, lasting high scratch resistance, real odor removal effect and good stability is obtained.

The invention discloses a method for synthesizing 5-(N, N-dibenzyl amino acetyl) salicylamide, which comprises the following steps: by taking benzaldehyde and benzylamine as raw materials and ethanol as a solvent, heating to a reaction temperature by using a micro-channel reactor, and reacting to obtain N-benzylidene benzylamine after the reaction is finished; taking the prepared N-benzylidene benzylamine as a raw material, adding hydrogen and a palladium carbon catalyst, reacting, and discharging the hydrogen after the reaction to obtain dibenzylamine; 5-bromoacetyl salicylamide and the prepared dibenzylamine are taken as raw materials, K2CO3 is taken as an acid-binding agent (or a deep eutectic solvent is used for replacing the acid-binding agent), acetonitrile is taken as a solvent, the materials are dropwise added under a low-temperature condition, a temperature rise reaction is carried out after dropwise adding is completed, the pH value of an obtained solid is adjusted with diluted hydrochloric acid to be acidic, then filtering, washing and drying are carried out, and the target product 5-(N, N-dimethyl-N, N-dimethyl formamide) is obtained. The compound is N, N-dibenzyl amino acetyl) salicylamide. The method has the advantages that the method is simple, the microchannel reactor is used, the product yield is high, the purity is high, and industrial production is easy.

The invention discloses a flame-retardant thermoplastic elastomer and a preparation method thereof, and relates to the technical field of high polymer materials. When the flame-retardant thermoplastic elastomer is prepared, cyanuric chloride sequentially reacts with 4-(phenylamino) benzaldehyde and N-(2-aminoethyl) maleimide to prepare a functional cross-linking agent; the preparation method comprises the following steps: grafting a vinyl phosphorus-containing monomer and 2-(2H-benzotriazole-2-yl)-4-methyl-6-(2-propenyl) phenol onto lignin through a free radical graft polymerization method to prepare modified lignin; the preparation method comprises the following steps: polymerizing polycaprolactone glycol and isophorone diisocyanate, and carrying out chain extension by using a bis (hydroxyethyl) furan monomer, so as to prepare polyurethane; uniformly mixing polyurethane, the modified lignin, a functional cross-linking agent and N, N-dimethyl formyl, drying and curing to obtain the flame-retardant thermoplastic elastomer. The flame-retardant thermoplastic elastomer prepared by the invention has the advantages of flame retardance, ultraviolet aging resistance and self-healing.

The invention relates to a synthetic method of chlorinated methyl styrene, which comprises the following steps: (1) in the presence of a reducing agent, carrying out selective reduction reaction on terephthalaldehyde or isophthalaldehyde to obtain p-hydroxymethylbenzaldehyde or 3-(hydroxymethyl) benzaldehyde; (2) in the presence of a chlorination reagent, carrying out chlorination reaction on the p-hydroxymethylbenzaldehyde or 3-(hydroxymethyl) benzaldehyde obtained in the step (1) to obtain p-chloromethylbenzaldehyde or 3-(chloromethyl) benzaldehyde; and (3) in the presence of alkali, carrying out Wittig reaction on the p-chloromethyl benzaldehyde or 3-(chloromethyl) benzaldehyde obtained in the step (2) to generate p-chloromethyl styrene or m-chloromethyl styrene. The method avoids the use of highly toxic chlorine or intermediates difficult to synthesize, has the advantages of short steps, mild conditions, high selectivity, high yield, environmental friendliness and the like, and has a good industrial application prospect.

The application discloses a method for synthesizing benzoic acid by oxidizing benzaldehyde, belongs to the technical field of fine organic synthesis, and can solve the defects of harsh reaction conditions and difficult separation of a catalyst existing in the synthesis of benzoic acid at present. An oxidation system in the application is constructed by O3 / TEMPO / HCl, and the product benzoic acid is obtained under normal pressure and at room temperature with an excellent yield. The method has the advantages of simple process, mild reaction condition, high efficiency and environmental protection, and has great potential and application value in the preparation of benzoic acid.

This invention discloses an MXene-based anode material, its preparation method, and its applications, belonging to the field of battery technology. The MXene-based anode material provided by this invention is obtained by grafting benzaldehyde with aminated MXene. This invention utilizes the potential active sites on the surface of aminated MXene, grafting it with benzaldehyde. This imparts a larger interlayer spacing to the material without destroying its special layered structure, significantly improving the material's structural stability and oxidation resistance, accelerating sodium ion transport kinetics, and improving its rate performance and long-cycle stability as an anode material, greatly enhancing its long-term fast charge-discharge capability. This invention utilizes the synergistic effect of two modification strategies, "amination" and "benzaldehyde grafting," to significantly improve the electrochemical performance of the MXene-based anode material, thereby obtaining a high-performance anode and sodium-ion battery.

The invention belongs to the technical field of organic synthesis, and particularly relates to a preparation method and application of a 2-phenyl-2H-chromene compound. According to the method, benzaldehyde and o-hydroxyacetophenone are taken as initial raw materials, Claisen-Schmidt condensation is carried out under an alkaline condition to prepare 2-hydroxychalcone, NaBH4 is utilized to reduce carbonyl to prepare an intermediate 2-(1-hydroxy-3-phenyl allyl) phenol, and then in an alkaline environment created by organic alkali Et3N, a 2-phenyl-2H-chromene skeleton is constructed by utilizing the complexing effect of BTC for the first time. According to the synthesis route, the synthesis efficiency of the chromene is remarkably improved, a practical method is provided for rapidly constructing a 2-phenyl-2H-chromene skeleton, and an important foundation is laid for efficient synthesis and structure-function relationship research of the chromene and structural analogues thereof.

The invention relates to the technical field of intelligent power grid equipment, discloses a chemical erosion prevention industrial control cabinet for an intelligent power grid, and aims to solve the problem that devices in a cabinet are eroded by chemical gas due to the fact that the chemical gas enters the cabinet body. According to the invention, chemical adsorption medium filtration is carried out in the air inlet shell, external air is sucked by the fan and must firstly pass through the chemical adsorption medium (such as activated carbon and alkaline / acidic adsorption cotton), and the medium can selectively adsorb acidic gas (HCl and SO), alkaline gas (NH) or organic corrosive gas (benzene and formaldehyde) in the external air; the air entering the cabinet body is ensured to be clean air, and chemical gas is prevented from entering through the actions, so that devices in the cabinet body are prevented from being eroded by the chemical gas.

A fragrance composition is provided. The composition comprises mogroside selected from the group consisting of symbioside I, 1,6-α isomers of symbioside I, and combinations thereof, and aromatic components selected from the group consisting of 4-hydroxy-2H-furan-5-one, ethylfuranone, maltol, vanillin, benzaldehyde, and combinations thereof.

The goal is to artificially ripen unripe green plums in a short period of time, thereby providing plums that are equivalent in quality to naturally ripened, fully mature plums. [Solution] In the decomposition step S4, the decomposition of cyanogenic glycosides such as amygdalin contained in the pulp of raw plums promotes the production of hydrogen cyanide and benzaldehyde. In the detoxification step S5, the produced hydrogen cyanide and benzaldehyde are detoxified. In the high-temperature sterilization step S7, the detoxified plums are sterilized at high temperature. In the ultraviolet irradiation step S8, the plums are further ripened by ultraviolet irradiation. As a result, unripe green plums can be artificially ripened in a short period of time, such as a few days, and plums equivalent to naturally ripened yellow plums that mature over about a month can be obtained.

The invention relates to the technical field of agricultural plant growth regulators, and discloses a phosphate compound containing an amide group as well as a preparation method and application thereof. O-aminopyridine, different substituted benzaldehyde and isocyanide are used as initial raw materials, and ring closing and ring opening are performed to obtain the phosphate compound containing the amide group. And finally, reacting with dialkyl phosphite to obtain the phosphate ester compound containing the amide group. The phosphate ester compound containing the amide group is high in activity, high in stability, simple in synthesis route and low in cost, can serve as an ABA analogue to be combined with abscisic acid receptor (PYL3) protein, can promote plant stomata closing and regulate crop root growth, and can be used as an abscisic acid receptor (PYL3) protein. Further, the drought stress regulation capability of the plants is improved.

The application discloses a preparation method of a benzothiadiazole Zr-MOF material, and specifically comprises the following steps: firstly, a product 4-(4,8-bis(4-(methoxycarbonyl)phenyl)-5H-imidazo[4',5':4,5]benzo[1,2-c][1,2,5]thiadiazol-6-yl)benzoic acid is prepared; the obtained product is reacted with NaOH and a THF / MeOH / H2O mixed solvent to obtain a product organic ligand SP; and a zirconium salt, the organic ligand SP and an organic acid are added into an organic solvent to perform a self-assembly reaction, so as to obtain the benzothiadiazole Zr-MOF material. The application fully utilizes the porosity, large specific surface area and excellent stability of the Zr-MOF material, and promotes the Zr-MOF material to be used as a heterogeneous photocatalyst to efficiently and repeatedly catalyze condensation and cyclization of o-phenylenediamine and benzaldehyde derivatives to prepare 2-phenylbenzimidazole derivatives.

A flavor composition is provided. The composition includes a dihydrochalcone selected from the group consisting of hesperetin dihydrochalcone, hesperetin dihydrochalcone 4"-beta-D-glucoside, and combinations thereof, and an aromatic ingredient selected from the group consisting of 4-hydroxy-2H-furan-5-one, ethyl furanone, maltol, furfural, 5-methylfurfural, vanillin, benzaldehyde, and combinations thereof.

The application relates to a preparation method of a mesotrione intermediate. S1, 3-chloro-2-methyl aniline, hydrochloric acid and pure water are placed in a reaction kettle, stirring, cooling, dropwise addition of a NaNO2 solution, after dropwise addition is completed, temperature control is carried out, CH3SNa aqueous solution is added, after dropwise addition is completed, slow temperature rising is carried out, and reaction is continuously carried out for 8 hours; extraction, water washing and distillation are sequentially carried out, and 1-chloro-2-methyl benzyl sulfide is obtained; S2, under the atmosphere of nitrogen, formylation reagent is added into a reaction kettle under the condition of 0-10 DEG C, a catalyst is dropwise added and stirring is carried out, 1-chloro-2-methyl benzyl sulfide is dropwise added, temperature rising is carried out, and 2-chloro-3-methyl-4-methylthio benzaldehyde is obtained through post-treatment; S3, under the atmosphere of nitrogen, methanol, 2-chloro-3-methyl-4-methylthio benzaldehyde and sodium tungstate dihydrate are added into a reaction kettle, hydrogen peroxide is dropwise added, the reaction temperature is controlled, and reaction is carried out, and the mesotrione intermediate is obtained through post-treatment.

The invention relates to a macroporous pyrene tetraketone-triazine covalent organic framework material as well as a synthesis method and application thereof, and belongs to the technical field of organic functional materials. The material is prepared from 2, 7-aminopyrene-4, 5, 9, 10-tetraketone and 4, 4 ', 4' '-(1, 3, 5-triazine-2, 4, 6-triyl) tri (benzaldehyde) through polymerization. The material has a relatively large mesoporous structure, high crystallinity and rich redox active sites. The large-size mesoporous structure is favorable for keeping relatively high ion flux of the diaphragm, the bidirectional catalytic action of pyrene tetraketone conjugated carbonyl can improve the reaction kinetics of the high-load lithium-sulfur battery, and the soft-package lithium-sulfur battery prepared under the conditions of high-activity load and poor electrolyte shows stable cycle performance and relatively high specific capacity.