384 results about "Aminopyridines" patented technology

The invention discloses a flame-retardant high-temperature-resistant fiber and a preparation method thereof, and relates to the technical field of fibers. When the flame-retardant high-temperature-resistant fiber is prepared, 1, 6-hexamethylenediamine, 1, 6-adipic acid, tetrahydrodifuran [3, 4-B: 3 ', 4'-D] furantetraone and a phosphorus-sulfur composite flame retardant are copolymerized to generate a polyamide-polyamide acid solution; 4-aminopyridine and the polyamide-polyamide acid solution are subjected to a reaction, and modified polyamide is prepared; the modified polyamide is subjected to melt spinning, and polyamide fibers are prepared; the preparation method comprises the following steps: pretreating nano titanium dioxide by using 4-bromobutyl trimethoxy silane to prepare modified nano titanium dioxide; mixing the modified nano titanium dioxide and ethanol to prepare a light-resistant antibacterial finishing agent; and carrying out post-treatment on the polyamide fiber by using an anti-light antibacterial finishing agent to prepare the flame-retardant and high-temperature-resistant fiber. The prepared fiber is excellent in comprehensive performance, particularly outstanding in flame retardance and high temperature resistance, and suitable for the fields of special protective clothing, high-temperature filtering materials and the like.

The invention belongs to the technical field of catalyst preparation, focuses on a high-entropy alloy nanowire catalyst, and mainly relates to a preparation method and application of an AuCuAgPtNi catalyst. A one-pot wet chemical method is innovatively adopted, a 4-aminopyridine solvent and metal precursors of gold, copper, silver, platinum and nickel are fully and evenly mixed and placed in an oil bath pot at the temperature of 90 DEG C, then a reducing agent ascorbic acid is rapidly added, after specific reaction time, washing, drying and other operations are sequentially carried out, and the high-entropy alloy nanowire AuCuAgPtNi catalyst can be successfully prepared. The preparation method disclosed by the invention has the remarkable advantages of simple process, simple steps, convenience in operation and the like. In an alkaline environment, the prepared nanowire-shaped high-entropy alloy AuCuAgPtNi catalyst shows extremely excellent catalytic activity and selectivity for catalytic degradation of waste plastic polylactic acid, the waste plastic can be efficiently upgraded and converted into pyruvic acid, a new way is opened up for resource utilization of the waste plastic, and the application prospect is wide. The method has a wide application prospect in the fields of environmental protection and resource recovery.

This application relates to the field of biosynthesis technology, and specifically discloses a pyridone compound, its biosynthesis method and application. Based on synthetic biology-related technologies, this application modifies non-ribosomal peptide synthetase, heterologously expresses non-ribosomal peptide synthetase mutants in a variety of hosts, and for the first time discovers and obtains a pyridone compound, and determines its chemical formula as C5H4N2O3, named 5-amino-pyridine-2,3,6-trione or 5-hydroxy-3-imino-pyridine-2,6-dione. This novel pyridone compound can be used as a raw material or intermediate in the development and preparation of novel antibiotics, drugs and dyes.

The invention relates to the technical field of pigment synthesis, and particularly discloses a synthetic method of ornamental blue. According to the synthetic method, 5-hydroxy-3-iminopyridine-2, 6-diketone is adopted as a raw material, enol interconversion is performed on the raw material under the alkaline condition (under the action of an alkali catalyst), heating is performed, and chemical condensation reaction is performed to obtain the ornamental blue. The synthetic method of the ornamental blue provided by the invention is simple in process and high in reaction selectivity, the yield and purity of the product are high, the yield of the ornamental blue product is more than or equal to 80%, the purity of the ornamental blue product is more than 99%, the synthetic method has obvious advantages, no potential safety hazard exists in the process, and industrial production can be realized.

The invention belongs to the technical field of organic synthesis, and particularly discloses an ammonia aromatic alkene modified near-infrared BODIPY fluorescent probe as well as a preparation method and application thereof.The near-infrared BODIPY fluorescent probe is obtained by adopting 6-(dimethylamino) nicotinic aldehyde to directionally modify the alpha position of BODIPY and constructing an expanded conjugated system through Knoevenagel condensation. Wherein dimethylamino provides a strong electron donating effect, a molecular structure is twisted into a non-planar configuration due to steric hindrance of a pyridine ring, pi-pi accumulation is reduced, and an ACQ effect is inhibited. According to the structural modification strategy, significant red shift of absorption / emission wavelength is realized by expanding a molecular pi-conjugated skeleton, and meanwhile, the stability of the BODIPY core and the quantum yield are effectively enhanced. The probe molecule can specifically recognize the diphenylalanine dipeptide structural unit by utilizing the synergistic coordination effect of the 2-aminopyridine derivative and the BODIPY mother nucleus, so that the selective detection of the Alzheimer's disease biomarker Abeta42 is realized, and a novel optical detection tool is provided for the early molecular diagnosis and targeted therapy of AD (Alzheimer's disease).

The invention discloses a synthesis method of bromo-triazine, which belongs to the technical field of organic synthesis, and comprises the following steps: preparing an alumina-loaded N, N-dimethylaminopyridine catalyst, filling the alumina-loaded N, N-dimethylaminopyridine catalyst in a fixed bed reactor, introducing tribromophenol and metal oxide mixed slurry and cyanuric chloride slurry, carrying out a reaction for 2-4 hours, and carrying out a reaction for 2-4 hours to obtain the bromo-triazine. Raising the temperature for reaction to obtain a crude product solution; and performing post-treatment to obtain a bromo-triazine product. According to the invention, the aluminum oxide loaded N, N-dimethylaminopyridine catalyst is synthesized, and the N, N-dimethylaminopyridine enables the reaction speed to be higher and the yield to be higher; nano aluminum oxide is adopted for loading, so that on one hand, dealkalization synthesis of bromotriazine is realized, and on the other hand, the reaction efficiency is accelerated; the continuous process realizes non-aqueous medium and low-temperature short-time reaction, so that hydrolysis is further avoided; the aluminum oxide loaded N, N-dimethylaminopyridine catalyst is high in activity and stability, the synthesis method is simplified, and the aluminum oxide loaded N, N-dimethylaminopyridine catalyst is suitable for industrial large-scale production.

The invention discloses a preparation method of 5-hydroxy-3-iminopyridine-2, 6-diketone, and relates to the technical field of compound preparation. The invention provides a preparation method of 5-hydroxy-3-iminopyridine-2, 6-diketone, which comprises the following steps: uniformly mixing observation blue with at least one oxidant of sodium hypochlorite, potassium permanganate and hydrogen peroxide according to a molar ratio of 1: (0.5-1.5) under a solution condition, reacting for 5-120 minutes, and adding a reducing agent to finish the reaction, thereby obtaining a target product. According to the preparation method provided by the invention, on the basis of the amide structure of the ornamental blue, 'endogenous catalysis' of the reaction can be realized, no additional catalyst needs to be introduced, and the 5-hydroxy-3-iminopyridine-2, 6-diketone with the yield of more than 60.53% and the purity of more than 60.2% can be prepared through a simple and convenient one-step reaction.

The invention provides an imidazo [1, 2-alpha] pyridine stimuli-responsive molecule with a D-A twisted structure as well as a preparation method and application of the imidazo [1, 2-alpha] pyridine stimuli-responsive molecule, belongs to the technical field of intelligent materials, and is used for solving the technical problem that intelligent materials for developing stimuli-responsive molecules for data encryption and information anti-counterfeiting are insufficient. The preparation method of the compounds N1 and N3 comprises the following steps: 2-aminopyridine and 2, 4 '-dibromoacetophenone are subjected to an amphiphilic reaction to obtain a compound a; the compound a and POCl3 are subjected to a Vilsmeier-Haack reaction, and a compound b is obtained; carrying out Suzuki coupling reaction on the compound a or the compound b and triphenylamine boric acid to obtain a compound N1 or N2; the compound N2 and malononitrile are subjected to a Knovenagel condensation reaction, and a compound N3 is obtained. The compound prepared in the invention has good fluorescence emission capability in a solution and a solid state and a grinding solvent acid / alkali stimulated fluorescence discoloration behavior, and can realize good data encryption and information anti-counterfeiting.

The invention belongs to the technical field of organic synthesis, and provides a preparation method of a cationic lipid compound, which comprises the following steps: (1) reacting 1, 5-dihalopentane, 2-tert-butyl glycolate and alkali to obtain a product G; (2) hydrolyzing the product G under an acidic condition to obtain a product H; (3) carrying out esterification reaction on the product H, the raw material C, 4-dimethylaminopyridine and a condensing agent in dichloromethane to obtain a product J; and (4) carrying out amination reaction on the product J, the raw material L and alkali in acetonitrile to obtain the cationic lipid compound. Compared with the prior art, the method has the relatively remarkable advantages that when the first part of halogenated long-chain alkyl ester H is synthesized by the method, 1, 5-dihalopentane and 2-tert-butyl glycolate are used as raw materials, the halogenated long-chain alkyl ester J is synthesized by a simple method, the product is obtained at a higher yield in synthesis, and the method is suitable for kilogram-level production. The route synthesis only comprises four steps of chemical reactions, and is suitable for industrial production.

To provide 2-aminopyridine derivative compounds for use as inhibitors of nitric oxide synthase.SOLUTION: Disclosed are 2-aminopyridine derivative compounds for use as inhibitors of nitric oxide synthase (NOS). In particular, the field of the present invention relates to 2-aminopyridine derivative compounds for use as inhibitors of neuronal nitric oxide synthase (nNOS), which are formulated as pharmaceutical compositions for treating nNOS-associated diseases and disorders such as Alzheimer's disease, Parkinson's disease, and Huntington's disease, as well as amyotrophic lateral sclerosis, cerebral palsy, stroke / ischemic brain injury, and migraine headaches.SELECTED DRAWING: Figure 1

The invention relates to the technical field of removal of carbon dioxide in oil gas, in particular to a preparation method of carbon dioxide PAMAM grafted ionic liquid for oil gas purification. Comprising the following steps: 1) activating carboxyl: dissolving 1-butyl-3-methylimidazole carboxylic acid in a solvent, adding dicyclohexylcarbodiimide and 4-dimethylaminopyridine, and stirring at room temperature to generate active ester; 2) grafting PAMAM: adding PAMAM dendrimer into the solution, and reacting under the protection of nitrogen; and 3) purification: removing the dicyclohexylurea precipitate through centrifugation, and dialyzing the filtrate to remove the unreacted ionic liquid and small molecule byproducts to obtain the PAMAM grafted ionic liquid. The stability and durability of the absorbent are remarkably improved, the CO2 absorption efficiency is improved, the energy consumption of the absorbent per unit mass is reduced, and the preparation method is simple and controllable, mild in reaction condition and easy for large-scale production.

The invention discloses application of a carbon steel corrosion inhibitor based on combination of physical adsorption, chemical adsorption and hydrophobic barrier, and relates to the technical field of metal corrosion inhibition. The technical problem that a corrosion inhibitor in the prior art is low in corrosion inhibition efficiency in a high-temperature strong-acid environment is solved. The preparation method of the carbon steel corrosion inhibitor comprises the following steps: firstly, ultrasonically dissolving 4-aminopyridine to obtain a solution I; then, dropwise adding an isopropanol solution of 2, 3-epoxypropyltrimethylammonium chloride into the solution I according to a molar ratio of 1: 1, removing a solvent through a rotary evaporation method, washing with ethanol, centrifuging to obtain quaternized 4-aminopyridine, and drying the quaternized 4-aminopyridine; and finally, the dried quaternized 4-aminopyridine and bromododecane are added into acetonitrile for a reaction, diethyl ether is dropwise added into obtained reaction liquid for precipitation, and the quaternized 4-aminopyridine-bromododecane carbon steel corrosion inhibitor is obtained after drying. The prepared carbon steel corrosion inhibitor is high in corrosion inhibition efficiency in a high-temperature and strong-acid environment.

The invention discloses a preparation method of 2-chloro-4-(4-fluoro-2-methylphenyl)-5-aminopyridine as an elinnetin intermediate, and belongs to the technical field of medicine synthesis. According to the invention, cheap and easily available 3-nitro-4-hydroxypyridine is used as an initial raw material, and the 2-chloro-4-(4-fluoro-2-methylphenyl)-5-aminopyridine is synthesized at low cost and high yield through the steps of halogenation, coupling, hydroxylation, reduction, condensation and the like. The raw materials used in the whole process are simple and easy to obtain, the reaction conditions are milder, and the reaction route is short. According to the invention, the Suzuki coupling reaction is firstly carried out, and then the hydroxylation of the pyridine 2 position is carried out, so that the use of an anhydrous reagent and harsh anhydrous reaction conditions are effectively avoided, and the reaction cost is remarkably reduced. In addition, the method is easy and convenient to operate, good in stability, high in total yield and suitable for industrial large-scale production.

The invention belongs to the technical field of sewage treatment, and particularly relates to a composite carbon source additive and a preparation method thereof. The composite carbon source additive comprises the following components in parts by weight: 30-40 parts of bagasse, 8-12 parts of a polyvinyl alcohol derivative, 2-4 parts of a functional filler, 5-8 parts of potassium citrate and 5-8 parts of sodium pyruvate, the preparation process of the polyvinyl alcohol derivative comprises the following steps: adding polyvinyl alcohol, 1, 3, 5-benzene trisulfonic acid, triethylamine and 4-dimethylaminopyridine into dichloromethane to react, filtering, washing and drying; the polyvinyl alcohol derivative is obtained. The composite carbon source additive can be slowly released in the denitrification process and continuously and stably provide a carbon source, the denitrification process is promoted, and the denitrification efficiency is improved.

The invention discloses a carbon-doped carbon nitride nanotube as well as a preparation method and application thereof in photocatalytic reaction, and belongs to the technical field of inorganic photocatalytic nano materials. Comprising the following steps: roasting urea, melamine and 2, 4, 6-triaminopyridine under protective gas; adding the carbon-doped carbon nitride nanotube, 5-hydroxymethylfurfural and chloroplatinic acid hexahydrate into the deionized water; photocatalytic hydrogen evolution is started to cooperate with selective oxidation reaction of 5-hydroxymethylfurfural. The carbon-doped carbon nitride prepared by the preparation method disclosed by the invention is in a nanotube shape; and the catalyst can be effectively applied to solar photocatalytic hydrogen evolution to cooperate with selective oxidation of 5-hydroxymethylfurfural to generate 2, 5-diformyl furan. The invention mainly solves the problems that the value-added reaction cooperated with the hydrogen production process cannot be realized and the overall economic value cannot be improved in the traditional hydrogen production means. The method is an effective, practical and simple method, is suitable for laboratory preparation and industrial production, and has huge development space and application prospect.

The invention discloses a folic acid modified active oxygen response type sodium alginate nano-carrier and application thereof, and the preparation method comprises the following steps: firstly synthesizing-Se-Se-FA: stirring dicyclohexylcarbodiimide, 4-dimethylaminopyridine, dimethyl sulfoxide / pyridine, a double-selenium fragment and folic acid at room temperature for 18-22 hours in an argon environment; and carrying out acetone precipitation, centrifugation, washing, rotary evaporation concentration and freeze-drying. The preparation method comprises the following steps: preparing an ALG-Se-FA carrier, stirring sodium alginate, 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride and hydroxysuccinimide in a 2-morpholinoethanesulfonic acid buffer solution, adding DMSO, dissolving a double-selenium fragment and a-Se-Se-FA fragment in DMSO and deionized water, adding the dissolved double-selenium fragment and-Se-Se-FA fragment into a system, stirring, dialyzing, and freeze-drying to obtain the product. According to the carrier, a double-selenium bond ROS response unit and folic acid targeting molecules are introduced through covalent bonds, astaxanthin can be efficiently entrapped and protected, and after the carrier is stable in gastrointestinal environment and reaches a colitis disease part, high ROS level can be responded, and intelligent drug slow release is achieved through folic acid receptor targeting.

Compounds and methods are provided for inhibiting a PI4-kinase. Methods of treating a pathogen infection and methods of treating cancer are also provided. The PI4-kinase inhibitor can be a compound that is a 5-aryl or heteroaryl-thiazole, e.g., as described herein. In certain embodiments, the PI4-kinase inhibitor is a substituted 2-amino-5-phenylthiazole or substituted 2-amino-5-pyridylthiazole compound. In some embodiments, the compounds have broad spectrum anti-infective activity against a variety of infective diseases, where the diseases are caused by pathogens containing a basic amino acid PIP-2 pincer (BAAPP) domain that interacts with phosphatidylinositol 4,5-bisphosphate (PIP-2) to mediate pathogen replication. Also provided are methods of treating a subject for cancer using a PI4-kinase inhibitor. Aspects of the methods include inhibiting PI4-kinase in a cancer cell to reduce cellular proliferation.

The invention provides an acid-resistant and anti-pollution composite nanofiltration membrane as well as a preparation method and application thereof, and relates to the technical field of membrane materials. The preparation method comprises the following steps: soaking the surface of a support membrane with a mixed solution I; the mixed solution I is prepared from doxycycline, 4-aminopyridine and deionized water; pouring an oil phase solution into the surface of the soaked support membrane to carry out interfacial polymerization reaction; the oil phase solution is composed of 1, 3-benzene disulfonyl chloride and cyclohexane; and carrying out heat treatment on the support membrane after the interfacial polymerization reaction to obtain the acid-resistant anti-pollution composite nanofiltration membrane. According to the prepared composite nanofiltration membrane, doxycycline is selected as a water-phase monomer for the first time, meanwhile, 1, 3-benzene disulfonyl chloride is selected as an oil-phase monomer, 4-aminopyridine is selected as an additive, and the prepared composite nanofiltration membrane not only has acid resistance and pollution resistance, but also has high permeation flux and high separation performance.

A preparation method of the acene 1, 8-naphthalimide derivative comprises the steps that acene 1, 8-naphthalimide is added into a dichloromethane solvent, p-bromobenzoic acid, 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride and 4-dimethylaminopyridine are sequentially added, stirring is carried out, and the acene 1, 8-naphthalimide derivative is obtained. Fully stirring and reacting the reaction mixture at 40-50 DEG C for 10-12 hours to obtain a reaction solution 2; and carrying out ice water quenching, suction filtration, extraction, drying and rotary evaporation on the reaction liquid 2 to obtain a solid product, and carrying out column chromatography purification to obtain the compound acene 1, 8-naphthalimide derivative. The preparation method of the phosphorescent material is simple and convenient, compared with a noble metal phosphorescent system, the cost is low, the synthesis method of the guest phosphorescent dye is simple, the yield is high, the phosphorescent effect is obvious, and the phosphorescent phenomenon is stable, so that the application potential in the fields of phosphorescent anti-counterfeiting and the like is huge.

The application discloses an alkali ion type covalent organic framework material and a preparation method and application thereof, wherein 2,4,6-tris(4-formylphenyl)-1,3,5-triazine, 1,4-diisocyanobenzene and 2-aminopyridine are used as building units, a covalent organic framework containing pyrimidine is obtained through a condensation reaction, and then a quaternary ammonium reaction and an ion exchange reaction are sequentially performed to obtain the alkali ion type covalent organic framework.The alkali ion type covalent organic framework material prepared by the application has rich alkali sites, developed pore structures and good chemical stability, exhibits good catalytic performance as a catalyst for one-pot preparation of dimethyl carbonate from CO2, an epoxide compound and methanol, and also shows good cycle stability.

Provided herein are crystalline salt and free base forms and amorphous forms of a compound having the following formula (I): (I) Compound 1. Also provided are pharmaceutical compositions comprising such crystalline and amorphous forms, processes for their manufacture and their use for the treatment of various conditions such as hemolytic anemia, sickle cell disease and MDS (very low risk MDS, low risk MDS, lower risk MDS and / or moderate risk MDS).

The present invention belongs to the technical field of semiconductor materials, and discloses a polymer with alternating arrangement of perylene diimide and naphthalene diimide, and its preparation method and application. The preparation method of the polymer includes the following steps: mixing naphthalic anhydride, alkanolamine and an organic solvent, and reacting to obtain naphthalene diimide-diol; mixing naphthalene diimide-diol, bromoacetic acid, 4-dimethylaminopyridine, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and an organic solvent, and reacting to obtain naphthalene diimide-dibromide; mixing naphthalene diimide-dibromide, perylene diimide-diamine and an organic solvent, and reacting to obtain the polymer. The present invention takes naphthalene diimide and perylene diimide as the core structures, and through design and synthesis, obtains a polymer with good water and alcohol solubility. This polymer can integrate the physical and chemical properties of the above two structural units, providing a guarantee for its application as an electron transport layer material in solar cells.

The invention relates to novel herbicidal active compound combinations which comprise substituted isoxazolincarboxamides or agrochemical acceptable salts thereof and substituted aminopyridines and aminopyrimidines. They can be used with particularly good results for the control of weeds in various crops of useful plants.

The present invention relates to a mononitroisosorbide derivative, its preparation method, and application. The derivative has the following structure: #imgabs0#, wherein R is one of the following structures: #imgabs1#. The mononitroisosorbide derivative is prepared by reacting 5-isosorbide mononitrate with an acyl chloride (sulfonyl chloride) compound in the presence of triethylamine and a catalyst, 4-dimethylaminopyridine. The mononitroisosorbide derivative exhibits excellent anti-tumor activity. Compared to existing technologies, the present invention designs and synthesizes multiple compounds with novel structures, among which ZM533 exhibits moderate anti-tumor activity against the A549 cell line and is expected to be used in the preparation of anti-lung cancer drugs.

The present invention relates to novel mesylate salt of N-(5-(4-(4-((dimethylamino)methyl)-3-phenyl-1H-pyrazol-1-yl)pyrimidine-2-ylamino)-4-methoxy-2-morpholinophenyl)acrylamide, a novel crystalline form thereof, and a process for preparing the same. More specifically, the present invention relates to mesylate salt of N-(5-(4-(4-((dimethylamino)methyl)-3-phenyl-1H-pyrazol-1-yl)pyrimidine-2-ylamino)-4-methoxy-2-morpholinophenyl)acrylamide, which is excellent in stability, solubility, and bioavailability when it is administered not only alone but also in combination with other drugs and which has a high purity, a crystalline form thereof, and a process for preparing the same.

The application belongs to the field of metal corrosion protection, and discloses a preparation method of graphene oxide-polyaspartic acid nanomaterial, which comprises the following steps: dispersing nano graphene oxide in a solvent to obtain a nano graphene oxide dispersion; dissolving polyaspartic acid, 4-dimethylaminopyridine and N,N-dicyclohexyl carbodiimide in an organic solvent to obtain a polyaspartic acid mixture; uniformly mixing the nano graphene oxide dispersion and the polyaspartic acid mixture according to a mass ratio of 1:1-1.5 of the nano graphene oxide and the polyaspartic acid, and performing a reaction under the protection of a certain temperature and an inert atmosphere; and after the reaction is completed, performing solid-liquid separation and collecting a solid product, namely, graphene oxide-polyaspartic acid nanomaterial. The corrosion inhibitor of the application can achieve efficient corrosion inhibition effect by adding a small amount of the corrosion inhibitor into water, and the operation is simple and the cost is low.

The invention relates to the technical field of chemical synthesis, and particularly discloses a compound with a peculiar smell removing function as well as a preparation method and application thereof. The chemical name of the compound is 2-ethoxy-3-((E)-methoxy-3-oxopropyl-1-alkene-1-yl) phenyl cinnamate, the smell of the compound is extremely light, sulfur-containing and nitrogen-containing compounds causing stink can be captured through a Michael addition reaction, and efficient peculiar smell removal is achieved. The preparation method comprises the following steps: (1) taking cinnamic acid as an initial raw material, and reacting with diethylamino sulfur trifluoride to prepare cinnamic acid acyl fluoride; (2) carrying out an esterification reaction on the cinnamic acid acyl fluoride and 2-methoxy-3-hydroxybenzaldehyde in the presence of 4-dimethylaminopyridine, so as to obtain 2-methoxy-3-formyl phenyl cinnamate; and (3) carrying out Wittig reaction on the 2-methoxy-3-formyl phenyl cinnamate and a phosphorus ylide reagent, so as to obtain the target compound.

The invention relates to the technical field of chemical oil-displacing agents for tertiary oil recovery, and particularly discloses a magnetic nano oil-displacing agent and a preparation method thereof. The preparation method comprises the following steps: S1, taking purple phosphorus nanosheets, ferrous sulfate, ferric chloride and ammonia water as raw materials to react to obtain magnetic purple phosphorus nanosheets; s2, reacting the polymer A with ethylenediamine to obtain an aminated polymer A; s3, adding the aminated polymer A or polymer B and 4-dimethylaminopyridine 1, 3-dicyclohexylcarbodiimide into an aqueous solution of the magnetic purple phosphorus nanosheet, so as to obtain a modified magnetic purple phosphorus nanosheet; s4, performing ammonification reaction on the surfactant to obtain an aminated surfactant; and S5, adding an aminated surfactant into the modified magnetic purple phosphorus nanosheet aqueous solution, then adding N-hydroxysuccinimide and 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride, and carrying out a reaction to obtain the magnetic nano oil displacement agent. The oil-displacing agent disclosed by the invention can realize magnetic recovery while realizing a viscosity reduction effect so as to improve the oil recovery rate, and waste of raw materials is avoided.

The invention discloses an ultraviolet-controlled photo-reversible dynamic crosslinking high polymer material with reversible antibacterial, shape deformation and toughening functions, and a preparation method thereof, belonging to the technical field of high polymer materials. Comprising the following steps: step 1) dissolving coumarin-3-formic acid, three-arm PCL (polycaprolactone), dicyclohexylcarbodiimide and 4-dimethylaminopyridine in dry dichloromethane in an inert atmosphere to obtain a reaction mixture; the invention relates to a preparation method of a coumarin-terminated three-arm polycaprolactone cross-linked polymer material.The preparation method comprises the following steps of (1) preparing coumarin-terminated three-arm polycaprolactone, (2) heating a reaction mixture obtained in the step (1) for set time, and filtering and separating an obtained product to obtain coumarin-terminated three-arm polycaprolactone, and (3) cross-linking and curing for set time through 365 nm ultraviolet to obtain a target product cross-linked polymer material.The function is highly integrated and dynamically adjustable, and the limitation that a traditional material is single in function is broken through.

This invention discloses a method for preparing sulfonamide-modified benzo[a]fluorene-5-one derivatives, using 1,7-enyne and N Using sulfonylaminopyridine salts as raw materials, a series of sulfonated benzo[a]fluorene-5-one compounds were successfully synthesized by catalyzing the sulfonation / cyclization tandem reaction of 1,7-enynes under photocatalytic conditions. This method has excellent functional group tolerance and high economic applicability.