205 results about "Cuprous salt" patented technology

A process for preparing 3,4,5-trifluorophenol from 1-halo-3,4,5-trifluorobenzene includes such steps as high-pressure reacting on ammonia water at 100-200 deg.C under existence of cuprous salt, Cu salt or copper oxide as catalyst to obtain 3,4,5-trifluorophenylamine, diazotizing reaction, and hydrolyzing. It has high output (74-77%) of product.

The invention discloses an orange phosphorescence Cu (I) complex luminescence material and a preparation method thereof. The above phosphorescence complex is obtained by complexing a cuprous salt with ligands, and the molecular structure of the complex is Cu(2-PBO)(POP)(PF6), wherein POP and 2-PBO are electrically-neutral ligands and represent bis(2-diphenylphosphinophenyl)ether and 2-(2-pyridyl)benzoxazole respectively. The complex has the advantages of easy purification and high luminescence efficiency of a micromolecule, and has a high thermal stability. The material is obtained through a direct mixing reaction of Cu(CH3CN)4PF6 and an acetonitrile solution of the ligands, and has the advantages of simple technology, simple apparatus, easily available raw materials, low cost and the like. The material can be used as an orange photoluminescence material, and can also be used as a luminescent layer phosphorescence material in electroluminescent devices composed of multilayer organic materials.

The invention discloses a yellow phosphorescent Cu (I) complex luminescent material and a preparation method thereof. Cuprous salt and ligand are subjected to complexing to form the phosphorescent complex, the molecular structure of the phosphorescent complex is Cu (2-PBO) (TPP) 2 (PF6), the TPP is an electrical neutral ligand triphenylphosphine, and the 2-PBO is 2-(2-benzoxazole) pyridine. The complex has advantages of small molecules which are easy to purify and high in luminous efficiency and has high heat stability. Cu(CH3CN)4PF6 and an acetonitrile solution of the ligand are directly mixed and reacted to form the material, and the material has the advantages that the process is simple and convenient, a device is simple, raw materials are easy to obtain, the cost is low, and the like. The material can serve as a photoluminescence yellow light material and as luminescent layer phosphorescent material in an electroluminescent device formed by multi-layer organic materials.

The invention discloses a soluble electroluminescent green light organic molecule glass material, a preparation method and applications thereof. The material comprises two types of a symmetric substituent benzothiadiazole derivative and a dissymmetric substituent benzothiadiazole derivative. The preparation method of the material comprises: carbazol and fluorine or anthracene are taken as raw materials, a bromide that contains Ar1 is obtained through palladium-catalyzed coupling reaction or cuprous salt catalyzed coupling reaction, and corresponding boric acid ester is generated through a next reaction; the boric acid ester is reacted with 4, 7-dibromo benzothiadiazole or a bromide of benzothiadiazole substituted by soluble resin Ar2 and a tiny molecule luminescent material which is symmetric or dissymmetric is obtained. The luminescent material prepared has good solubility in a solvent with high boiling point and weak polarity and can be purified by the solution method; simultaneously, the luminescent material has good thermal stability and morphologic stability, particularly the luminescent material with the dissymmetric structure has advantages in both synthesis and purification, thus having important application prospect in electroluminescence display, illumination and laser.

A test device and method is described for directly determining the liquid phase water content of organic solvents and indirectly the liquid phase water content of solids. The device and method utilize a reagent composition consisting basically the dried residue of a mixture of a colorimetric indicator material, preferably a cobaltous or cuprous salt, and a polymeric water barrier material, such mixture incorporated into a matrix which is contacted with or immersed into the liquid test sample, removed therefrom and the color change of the test composition correlated with a standard color chart to give a quantitative result of the amount of water in the test sample. When the method is applied to solids, the water must first be extracted from the solid using a substantially anhydrous extracting fluid such as reagent alcohol.

Embodiments of the present subject matter provide a compound and material that may be used as a lead-free primary explosive. An embodiment of the present subject matter provides the compound copper(I) nitrotetrazolate. Certain embodiments of the present subject matter provide methods for preparing lead-free primary explosives. The method includes: providing cuprous salt; providing water; providing 5-nitrotetrazolate salt; combining the cuprous salt, water and 5-nitrotetrazolate salt to form a mixture; and heating the mixture. The method may also include providing cuprous chloride and providing sodium 5-nitrotetrazolate. Certain embodiments of the present subject matter also provide methods for preparing copper(I) nitrotetrazolate. The method includes: providing cuprous salt; providing water; providing 5-nitrotetrazolate salt; combining the cuprous salt, water and 5-nitrotetrazolate salt to form a mixture; and heating the mixture. The method may also include providing cuprous chloride and providing sodium 5-nitrotetrazolate.

The invention relates to an economic method for removing chloride ions in a copper sulphate solution. The method comprises the following steps: adjusting a pH value and oxido reduction potential and adjusting copper sulphate with sodium carbonate and sodium sulfite to a reaction interval where Na2[CuCl3] can stable exist; carrying out heating, adding elemental copper powder, allowing Na2[CuCl3] in the solution and the elemental copper powder to undergo comproportionation so as to produce a white CuCl cuprous salt precipitate insoluble in water; and carrying out full cooling to separate cuprous salt sediment and the copper sulphate solution so as to obtain a dechlorinated copper sulphate solution. The method utilizes the characteristic that wet cuprous salt sediment is not stable under the condition of a high pH value to convert the wet cuprous salt sediment into dechlorinated copper residues consisting of CuO, CuCO3 and Cu(OH)2 and to return the dechlorinated copper residues into a system for reuse, and a produced sodium chloride solution has high concentration and can be directly used for evaporative preparation of industrial NaCl. The method is widely applicable to removal of chloride ions of various concentrations from high-concentration copper sulphate solutions; reagents added for reaction do not influence quality; except cost for heating, operation cost is negligible; and the method is economic and easily practicable.

The invention relates to a method for preparing vanillin and analogue thereof, which comprises the following steps: dissolving 4-methyl-2-bromophenol in methanol solution of alkali metal hydroxides, adding a cobalt catalyst into the mixture, putting reaction solution in a high-pressure reaction kettle, charging pressure oxygen into the reaction kettle under the heating condition to efficiently complete the oxidizing reaction, and preparing an intermediate 4-hydroxyl-3-bromo benzaldehydes by carrying out simple separation and neutralization; and using a cuprous salt-carbon monoxide or cuprous salt-methyl formate composite catalyst system to carry out catalysis on the 4-hydroxyl-3-bromo benzaldehydes in excessive alkoxy alkali metal compound-corresponding alkyl alcohol solution to make the alkoxylation substitution reaction occur efficiently under the heating condition in the reaction kettle to generate the vanillin and the analogue thereof. The invention has the advantages of high product yield, good purity, directly recyclable alcohol solvent, low environment pollution, low production cost and the like.

The invention discloses a preparation method of an aromatic methyl ether compound, which comprises the following steps: inactive aromatic bromides are dissolved in an excessive sodium methoxide methanol solution in a pressure kettle and cuprous salt as a primary catalyst and carbon monoxide as an auxiliary catalyst or cuprous salt as a primary catalyst and methyl formate as an auxiliary catalyst are added in the pressure kettle, the sealed pressure kettle completes methoxylation displacement reaction under the condition of being heated; high-purity methanol is recycled and outcome is simply separated to obtain the aromatic methyl ether compound which has high yield and purity. The invention has the advantages that the efficiency of methoxylation is enhanced, thereby improving the quality and the yield of the product and also reducing the production cost.

The invention discloses a water purification method capable of realizing in-situ preparation of a catalytic material, catalyzing ozone by the catalyst to oxidize organic micropollutants and realizing in-situ regeneration of the catalytic material, which is economic, effective, simple, convenient and practical. Permanganate, manganese salt, copper salt, cuprous salt and the like are taken as raw materials; copper and manganese composite oxide with high catalytic activity is loaded on a base material in an in-situ reaction manner to prepare the catalyst; the catalyst is applied to the catalysis of the ozone oxidation process, so that the effect of removing the organic micropollutants which are difficult to degrade from water by using the ozone can be effectively improved; and when the catalyst is inactivated or lost, the active material is subjected to load regeneration by a simple and effective in-situ regeneration method.

The invention discloses a method for preparing isocoumarin and derivatives thereof, comprising the following steps of: putting an o-halogen benzoic acid, a 1, 3-dicarbonyl compound, cuprous salt and alkali in a reaction vessel, adding a dimethyl formamide (DMF) solvent into the reaction vessel, hermetically stirring at a temperature of 100-120 DEG C, reacting for 12-24 hours, quenching the reaction, extracting, washing, drying, concentrating and purifying the reaction liquid and obtaining an end product. The synthetic method of the isocoumarin and the derivatives thereof is scientific and reasonable and has the characteristics of high synthetic yield, good selectivity, easiness in purifying the products and the like; and the isocoumarin derivatives with various substituent groups, which cannot be synthetized by utilizing the other methods, can be synthetized and obtained.

The invention discloses a yellow phosphorescent tetrahedral cuprous complex luminescent material and preparation method thereof. The phosphorescent complex disclosed by the invention is obtained through the complexation of a cuprous salt and ligands and has the molecular structure of Cu(POP)(4-PBO)(CH3CN)(PF6), wherein POP and 4-PBO are electroneutral ligands, namely bis(2-diphenyl phosphorus phenyl) ether and 4-(2-benzoxazolyl)pyridine. The complex has the advantages of easiness in micromolecule purification and high luminescence efficiency and has the advantage of being easily dissolved by organic solvents; the material is directly obtained through the stepped mixing reaction of Cu(CH3CN)4PF6 and a solution of two ligands and has the advantages that the process is simple and convenient, the equipment is simple, the raw materials are easily obtained, the cost is low and the like; the material can serve as a photoluminescent yellow material and can also serve as a luminescent-layer phosphorescent material, consisting of multiple layers of organic materials, of an electroluminescent device.

The invention relates to a method for preparing syringaldehyde by oxidative degradation of lignin, which comprises the following steps of: 1) dissolving an oxidative degradation product solid of the lignin by using an organic solvent, adding ammonia water to obtain a syringaldehyde and ammonia water complex precipitate, performing centrifugal separation, and acidifying the complex precipitate to obtain syringaldehyde; and 2) evaporating to dryness under reduced pressure and centrifuging to obtain ammonia water mixed solution, performing bromination on the obtained solid substance and elemental bromine or bromine hydride solution, and performing methoxylation reaction on the bromination product and sodium methoxide under the catalysis of cuprous salt to obtain the syringaldehyde. By the steps, the oxidative degradation product of the lignin is all converted into the same product, namely the syringaldehyde, the yield of the syringaldehyde is 50-60 percent, the utilization rate of lignocellulosic materials is improved, the cost of cellulose alcohol and papermaking industry is reduced, and the method has important meaning for realizing high value-added industrial development of the lignin and industrialization of cellulose ethanol and promoting agricultural sustainable development.

The invention discloses a composite adsorbing material of a metal organic framework and cuprous salt and a preparation method and application thereof. The adsorbing material is compounded by the metal organic framework HKUST-1 and cuprous salt and is a brand-new composite adsorbing material, wherein the HKUST-1 has a very high specific surface area and can form physical adsorption with azobenzene dyes such as methyl orange, and the cuprous salt is attached to the surface of the KHUST-1 and is uniformly dispersed, so that the adsorption capacity of the material on organic dyes is favorably improved. The preparation method disclosed by the invention is simple and feasible and is easy to realize; and furthermore, the composite material can be widely applied to organic dyes for removing azobenzene, and particularly has good application prospects in the aspect of removing dyes, such as methyl orange, Sudan red, reactive black, methyl red and dimethyl yellow.

The invention relates to a method for circularly removing impurity chlorine in zinc sulfate solution by using cuprous salt. The method comprises the following steps of: reacting industrial cupric sulfate with electric furnace zinc powder in a chlorine-containing zinc sulfate solution to generate dechlorinating slag, i.e., cuprous chloride Cu2Cl2; leaching the dechlorinating slag by using industrial salt water, separating copper sponge to generate cuprous liquid Na2(CuCl3), and neutralizing by caustic soda liquid NaOH to synthesize original cuprous salt Cu2O.CuOH; and adding the cuprous salt into the chlorine-containing zinc sulfate solution to react so as to generate the dechlorinating slag, and repeatedly and circularly carrying out the steps. The method is characterized in that chlorinein the zinc sulfate solution is removed by using the active cuprous salt, so that the method is easy to operate and high in chlorine removing efficiency; the produced dechlorinating slag is leached by using the industrial salt, so that chlorine is enriched in the high-concentration industrial salt solution, comprehensive utilization is facilitated, and simultaneously, the impurity in the dechlorinating slag is removed, so that the accumulation of the impurity in the process of recycling can be avoided; and the leach liquor of the industrial salt can be neutralized and synthesized by the caustic soda liquid, and the product cuprous salt is high in active ingredients and less in impurity, so that effective removal of chlorine in the zinc sulfate solution is facilitated, and the dechlorinating efficiency of the zinc sulfate solution containing 1.0-20.0g / L of chlorine can reach 80-99%.

The invention discloses a propynylamine high-temperature acidizing corrosion inhibitor and a preparation method thereof. The propynylamine high-temperature acidizing corrosion inhibitor is prepared by the following steps: by taking propargyl alcohol, organic amine and aldehyde as raw materials and a cuprous salt as a catalyst, carrying out mannich reaction within a relatively short time under promotion of ultrasonic waves to synthesize propynylamine compounds; and compounding the propynylamine compounds with potassium iodide and a surfactant. The corrosion inhibitor is a yellow or brown emulsion and is stable and uniform, can be well dispersed in an acidic liquid and can give play to a good corrosion inhibiting effect under the condition of a high temperature from 100-140 DEG C, so that the propynylamine high-temperature acidizing corrosion inhibitor is effectively prevented being corroded in the acidizing process. In addition, the corrosion inhibitor disclosed by the invention is prepared by using an ultrasonic wave synthetic method and has the characteristics of being low in synthetic temperature, short in time, high in reaction yield and the like.

The invention provides a preparation method of an olefin metathesis catalyst shown in a formula (I), wherein each symbol is as defined in the specification. The method comprises the following steps of: (1) reacting benzaldehyde with hydrazine hydrate to generate a diazo compound (b), wherein the ortho-position of the benzaldehyde is replaced by hydroxyl, sulfydryl, alkoxy or sulfenyl; (2) reacting the diazo compound (b) obtained in the step (1) with metal salt M(L1)p(L2)q to generate a compound (c); and (3) reacting the compound (c) obtained in the step (2) with cuprous salt to obtain a compound shown in the general formula (I).

The invention relates to an organic, inorganic hybrid green-light light-emitting material having a network structure, preparation and use thereof. The composition comprises an end function POSS chip structural part, an end bi-function green-light light-emitting organic group part and a closed-end organic molecule. The mol ratio is 1: n: m-2n, wherein n is equal to 1-7, and n is greater than or equal to 1 and is less than or equal to m / 2. The preparation is as follows: according to the mol ratio of 1: n, using the end function POSS and the end bi-function luminous molecule under catalysis of cuprous salt by using methods, such as click chemical method, to prepare controllable organic, inorganic hybrid green-light light-emitting material having a network structure. The green-light material can be used in fields of all kinds of displays, optical communication, indoor decorative light source, three-dimensional storage, optical modulation and solar battery, and the like. The green-light material of the invention has the characteristics of easily designed and controlled structure, simple preparation process, environment-friendly property, good film-forming property, and the like.

The invention discloses a method for preparing 2, 3, 4, 5-isoimerubrine toluene. The method uses 3, 4, 5-trimethoxy toluene as a raw material to prepare the high-quality 2, 3, 4, 5-isoimerubrine toluene through two steps of bromic reaction and methoxyl group displacement reaction, wherein a bromination reagent in the method adopts a mixture of sodium bromide, potassium bromide or lithium bromide and hydrogen peroxide or other suitable oxidants; and the methoxyl group displacement reaction is performed only by using CuCl or other cuprous salts as a catalyst, and DMF as an auxiliary catalyst at normal pressure. The method avoids rigorous reaction conditions of using costly reagents and poisonous reagents, pressurizing and the like, and gets good effect, has total reaction yield normally above 90 percent and less reaction steps; besides, the used reagent is easily available, the production cost of products is further reduced, and the method is completely environment-friendly.

A process for synthesizing diethyl carbonate from alcohol, oxygen and CO through direct oxidization and oxonation in liquid phase under the existance of catalyst features that a homogeneous two-component catalyst system is used, where the high-activity copper salt and cuprous salt are used as primary catalyst and the organic nitride is used as cocatalyst; and a single-tube bubbling-type reactor is used. Its advantages are simple process, high output rate, low cost and no pollution.

The invention discloses a Novel crystal-form Cu (I) complex luminescent material adopting benzoxazolyl quinoline with a novel crystal form and a preparation method thereof. The phosphorescent complex is obtained by complexing cuprous salt and ligand, the molecular structure is [Cu(QBO(PPh3)2]PF6, wherein PPh3 and QBO are electrically neutral ligand triphenylphosphine and 2-(2-benzoxazole) quinolone. The complex has the advantages of easiness in purification and high luminous efficiency of micromolecules as well as high thermal stability. The material is obtained through solvothermal reaction of Cu(CH3CN)4PF6 and the ligand in an ethanol and water mixed solvent to, has the advantages of simple and convenient technology, simple equipment, easiness in getting of raw materials, low cost and the like, can be used as a photoluminescent yellow light material or a luminescent layer phosphorescent material in an electroluminescence device formed by multiple layers of organic materials.

The invention provides an N-arylation method in an aqueous phase system, which is simple and convenient and environmentally friendly, and has mild reaction condition and economic process. The method comprises the following steps: taking aryl halide and amine as raw materials, and water as solvent, metallic copper, or oxide of copper, or cuprous salt or cupric salt as catalytic agent, and using adipic dihydrazide compound as a ligand to generate C-N coupling reaction; the reaction steps are as follows: adding catalyst, ligand, aryl halide, amine, alkali, surface active agent and water into a microwave reactor or a reaction vessel; reacting by stirring by adopting the mode of microwave assistant heating, or common heating bath heating or direct room temperature reaction; separating and purifying the reaction mixed liquor after the reaction is completed to obtain the N-arylation product. The method of the invention has the characteristics of simple operation, wide substrate application range, simple products which can be separated easily, high yield, economic process and environmental friendliness and the like, and takes water as solvent, has wide application range of the substrate, and has wide application prospects in preparation aspects of natural products, drugs and pesticides.

With the solvent of methanol and secondary solvent of non-protonic solvent, m-bromo-benzoyl formaldehyde reacts with sodium methoxide, using cuprous salt as catalyst. Then the product is under vacuum distillation to produce product contg. 98% of m-methoxyphenyl formaldehyde. Said invention process ha advantages of: short reaction time, simple operation, high yield, high utilization rate of reaction equipment, commercialization to be realized easily.

The invention relates to the technical field of catalyst preparation, in particular to an n-heterocyclic carbene functionalized porous organic polymer supported copper catalyst, a preparation method thereof and an application of the catalyst. Imidazolium ionic liquid serves as a solvent, water serves as a co-solvent, bis(1-imidazolyl) methane and polybrominated methyl aromatic hydrocarbon serve asco-monomers, pre-polymerization is performed for 0.5-3 hours at room temperature, polymerization reaction is performed for 12-48 hours at the temperature of 80-140 DEG C to obtain a porous polymer containing imidazolium salt, and then cuprous salt is supported on the porous polymer under alkaline conditions to obtain the n-heterocyclic carbene functionalized porous organic polymer supported copper catalyst. The porous catalyst has the advantages of large specific surface area and wide pore diameter distribution, and methanol and ethanol oxidative carbonylation can be efficiently catalyzed tosynthesize dialkyl carbonate. Compared with a traditional supported catalyst, the catalyst is high in activity, not easily lost, long in recycling life and expected to be used for practical industrialproduction.

The invention relates to a nonisocyanate-cured azide polyether binder system and a propellant, and belongs to the technical field of solid propellants. The system includes the following components inparts by mass: 54% to 96.6% of a binder, 3.2% to 45.3% of a curing agent, and 0.2% to 1.5% of a curing catalyst, wherein the binder is glycidyl azide polymer (GAP), the curing agent is a bifunctionalor multifunctional alkynyl-terminated polyether, and the curing catalyst is at least one of nano copper powder and a cuprous salt. The propellant provided by the invention has higher curing reaction activity and a faster reaction speed, can be cured at normal temperature, and solves the problem of residual thermal stress of grain solidification; the reaction mechanism is not affected by moisture,and the affect of environmental humidity and the moisture of the raw materials on curing and mechanical properties can be eliminated; and the obtained propellant has excellent mechanical properties, especially has higher elongation, and the elongation can reach 100% or more and is much higher than a level of mechanical properties reported outside China.

The invention discloses a synthesis method of an isocoumarin derivative. The method comprises the following steps: adding 3-hexyl-4-cyan-6,7-dimethoxy isocoumarin (A), a cuprous catalyst and acetaldoxime (B) in a reaction vessel, adding a solvent N,N-dimethyl formamide (DMF), stirring and refluxing; reacting for 1 hour, cooling, filtering reaction solution in vacuum, and adding a certain amount of water in the filtrate, filtering separated solid in vacuum, drying and low-temperature crystalizing obtained coarse product so as to obtain a target product 3-hexyl-4-acylamoni-6,7-dimethoxy isocoumarin (C). The method for translating the isocoumarin into acylamino is scientific and reasonable, the step is simple, the reaction time is short, the selectivity is good, the translation rate is high, the product is easy to purify; cuprous salt is firstly used as the catalyst, and the catalysis efficiency is high in comparison with the reported cupric, in particular, the cuprous has good catalysis effect on cyan hydrolysis with large steric hindrance.

The invention discloses a preparation method of 4-bromo-2, 3, 5, 6-tetrafluorobenzeneacetic acid, the structure of which is shown in formula one. The method comprises the following steps: (a) under the protection of nitrogen and a temperature ranging from 40 to 120 DEG C, 2, 3, 4, 5, 6- bromopentafluorobenzene with the structure shown in formula two and diethyl ester with the structure shown in formula three perform nucleophilic substitution with the catalysis of cuprous salt and under the effect of strong base, and an intermediate 2-(4-bromo-2, 3, 5, 6-phenyl tetrafluoride) diethyl ester with the structure shown in formula four is obtained; inorganic base and water are added to2-(4-bromo-2, 3, 5, 6-phenyl tetrafluoride) diethyl ester to perform hydrolysis under reflux condition; after complete hydrolysis, heating and decarboxylation, 4-bromo-2, 3, 5, 6-tetrafluorobenzeneacetic acid is obtained. The preparation method has the advantages that, the low toxic substance diethyl ester is used as the nucleophile, and the ethanol, a small amount of CO2 and other substances produced during the hydrolysis decarboxylation have less environment pollution, so the method has environmental advantages.

The invention relates to phosphine imide ligand (E)-(2-(diphenyl phosphino) benzylidene) hydrazine, which belongs to a diphosphine ligand containing imide groups and contains two atoms coordinated with metal ions. A synthetic method is characterized in that the final target is prepared through preparing an intermediate of 2-diphenylphosphine benzaldehyde; and phosphine imide ligand and cuprous salt form a catalyst system, and the catalyst system is used for cross-coupling catalytic reaction between terminal alkyne and sp2 type carbon halide for preparing substituted diphenylacetylene. The phosphine imide ligand (E)-(2-(diphenyl phosphino) benzylidene) hydrazine has the advantages that the catalyst system has high reaction reactivity on aryl iodide substrates and also has a certain activity on aryl bromide, the applicable substrate range is wide, and in addition, self-coupling products can be perfectly controlled not to be generated; the synthetic method is simple, and the post treatment is convenient; expensive and toxic palladium is not used in the catalysis, and cheap, economic and clean copper which is easy to obtain is adopted; and organic amine is not used as an alkaline solvent, in addition, the reaction time is short, the catalyst consumption is low, and good application prospects are realized in industrial production.

The invention provides a preparation method for 2-nitro-4-trifluoromethyl cyanobenzene. Under the catalysis of a metal catalyst, heating 3-nitro-4-halogen benzotrifluoride shown in the structural formula (2) and an organic cyanogen source in a solvent for reaction to obtain the 2-nitro-4-trifluoromethyl cyanobenzene shown in the structural formula (1), and the structural formula (2) and the structural formula (1) of 3-nitro-4-halogen benzotrifluoride and 2-nitro-4-trifluoromethyl cyanobenzene refer to the Specification. According to the invention, cheap copper salt or cuprous salt is used as the catalyst, and the method has the advantages of high conversion rate, relative low toxicity of a cyanation reagent, the capability of reaction under the atmosphere, and the like.

The invention provides an N-arylating method with convenience, mild reaction condition, friendly environment and economical process in an aqueous phase system. An aryl bromide or iodide and amine are used as raw materials, water is used as a solvent, metallic copper or a copper oxide or cuprous salt or cupric salt is used as a catalyst, and a pyrrole-2-hydrazide compound is used as a ligand to produce a C-N coupled reaction; the N-arylating method comprises the following reaction processes: adding the catalyst, the ligand, an aryl halide, the amine, a surfactant and the water into a microwavereactor or a reaction vessel, and carrying out a stirring reaction by adopting a microwave auxiliary heating or ordinary heat bath heating mode; after the reaction is finished, separating a reaction mixed liquid and purifying to obtain an N-arylating product. The method of the invention has the characteristics of simple operation, wide application range of substrates, simple and easy separation of products, high yield, economical process, friendly environment and the like. The water is used as a reaction solvent, the substrates have wide application ranges, and the N-arylating method has broad application prospect in the aspect of preparing natural products, medicaments and pesticides.