220 results about "Methyl iodide" patented technology

The invention provides a triphenylamine derivative as well as a preparation method and application thereof in killing gram-positive bacteria. The preparation method comprises the following steps: firstly, synthesizing an intermediate molecule 4-di-p-methoxyanilino benzaldehyde (s); the s respectively reacts with 3-pyridylacetonitrile and 4-pyridylacetonitrile to generate intermediate molecules a and b; the intermediate molecules a and b respectively react with methyl iodide to generate triphenylamine derivatives 1 and 2, and the intermediate molecules a and b respectively react with 9-bromomethyl anthracene to generate triphenylamine derivatives 3 and 4. The prepared triphenylamine derivative has a donor-acceptor structure and is a D-pi-A structure, the modified triphenylamine is used as a donor, a carbon-carbon double bond is used as a covalent bridge, and cyano and N positive ions have electron withdrawing property. As all the components contain positive ions, the components can be anchored on a bacterial membrane to kill bacteria; and the compound has a short alkyl chain and can be combined with gram-positive bacteria, so that the bacteria are killed.

The invention discloses a mechanical force-induced fluorescence discoloration sensor material as well as a preparation method and application thereof, and relates to the technical field of organic synthesis and fine chemical engineering. The preparation method comprises the following steps: step 1, carrying out heating reaction on 4-(1, 2, 2-triphenyl vinyl) benzaldehyde, 3-(2, 2-dicyano-1-(3, 4-diaminophenyl) vinyl) benzene-1-yl and a catalyst to prepare a compound 1-1; and 2, carrying out heating reaction on the obtained compound 1-1 and methyl iodide under the action of alkali and a solvent, and analyzing and purifying to obtain a compound 1-2. The compound disclosed by the invention is low in preparation cost, simple and convenient to operate and simple in method, the compound shows the material characteristic of mechanical force-induced fluorescence discoloration and can be applied to the fields of sensors, dyes, anti-counterfeiting and the like, and meanwhile, the synthesis method can be used for synthesis in the fields of fine organic chemical engineering such as luminescent materials, printing and dyeing technologies and the like.

The invention relates to the technical field of organic iodine detection, in particular to application of a COF material in iodomethane fluorescence detection. The structure of the COF material is as follows: # imgabs0 #. The COF material with a specific structure is applied to iodomethane fluorescence detection, the COF material is low in cost, easy to obtain and good in thermal stability and acid-base stability, the use limitation under many harsh conditions is avoided, and the iodomethane fluorescence detection method is simple and rapid.

The invention discloses a preparation method and application of a metal sulfide adsorbent for adsorbing iodine and methyl iodide. The preparation method comprises the following steps: uniformly mixing an antimony source, a sulfur source, a deep eutectic solvent, polyamine and water to obtain a mixed solution; and transferring the mixed solution into a high-pressure reaction kettle, sealing, carrying out hydrothermal reaction at 110-220 DEG C for 2-9 days, cooling to room temperature to separate out crystals, and filtering, washing and drying to obtain the metal sulfide adsorbent. The invention also discloses application of the metal sulfide adsorbent in adsorption of iodine and methyl iodide. The metal sulfide adsorbent disclosed by the invention has a good adsorption effect on iodine and methyl iodide, and compared with an ethylenediamine-oriented metal sulfide adsorbent, the diethylenetriamine-oriented metal sulfide adsorbent has higher adsorption capacity on iodine and methyl iodide.

The invention discloses a method for synthesizing loxoprofen sodium by using a resin catalyst, and belongs to the field of medical chemical synthesis. The preparation method comprises the following steps: synthesizing 2-methylene cyclopentanone through methylenation reaction of cyclopentanone, paraformaldehyde and amine; the preparation method comprises the following steps: reacting 4-halogenated phenylacetate with methyl iodide to synthesize 2-(4-halogenated phenyl) propionate; a target intermediate 2-(4-((5-oxocyclopentyl-1-alkenyl) methyl) phenyl) propionate is generated through a Heck coupling reaction; further reducing to 2-(4-((2-oxygen cyclopentyl) methyl) phenyl) propionate through a catalytic hydrogenation reaction; and finally, carrying out a salt forming reaction to obtain loxoprofen sodium. The method adopts the self-made resin catalyst, is efficient and environment-friendly, has good yield and purity, and is suitable for industrial production.

The invention discloses a preparation method of methylboronic acid-d3, which comprises the following steps: taking iodomethane-d3 as a raw material, carrying out Grignard reaction on the iodomethane-d3 and magnesium chips to generate methyl magnesium iodine-d3, further reacting the methyl magnesium iodine-d3 and trimethyl borate to generate dimethyl methylboronic acid, adding acid, quenching, hydrolyzing, and purifying to obtain the methylboronic acid-d3. The product prepared by the method is high in purity, high in yield and high in deuteration degree.

The invention discloses a high-barrier packaging material and a preparation method thereof, and relates to the technical field of packaging materials. When the high-barrier packaging material is prepared, 5, 12-tetrabenzoquinone and tetrabromomethane react to prepare an intermediate; reacting the intermediate with 4-(benzyl acrylate) phenylboronic acid to obtain a stilbene-based cross-linking agent; the preparation method comprises the following steps: carrying out a reaction on polyethylene glycol terephthalate, 3-amino propylene and allyl tri (trimethylsiloxy) silane to prepare functional polyester; reacting the pre-modified nano mica sheet with methyl iodide to obtain a modified nano mica sheet; the preparation method comprises the following steps: uniformly mixing functional polyester, a stilbene-based cross-linking agent, a modified nano mica sheet and 7-methyl-1, 5, 7-triazabicyclo [4.4. 0] dec-5-ene, and carrying out blow molding to obtain the high-barrier packaging material. The high-barrier packaging material prepared by the invention has excellent flame-retardant, antibacterial, anti-aging and high-barrier properties.

The invention relates to the technical field of covalent organic framework functional materials, in particular to a pyridine-rich imine type covalent organic framework as well as a preparation method and application thereof. The pyridine-rich imine type covalent organic framework disclosed by the invention has a structure as shown in the following formula (I): # imgabs0 # formula (I). The pyridine-enriched imine type covalent organic framework disclosed by the invention contains rich pyridine-N active sites, can efficiently adsorb iodine through Lewis acid-base action, and can effectively fix iodomethane through methylation reaction, so that two iodine pollutants can be efficiently captured at the same time. The pyridine-rich imine type covalent organic framework disclosed by the invention also has good crystallinity, larger specific surface area and excellent thermal stability and acid-base stability, and can realize efficient adsorption of iodine and iodomethane.

The invention relates to the technical field of preparation of small molecule compound medicines, in particular to a preparation method of (S)-flurbiprofen. The method comprises the following steps: dropwise adding a tetrahydrofuran solution of 4-bromo-2-fluorobiphenyl into a mixture of tetrahydrofuran and magnesium, and reacting to generate a Grignard reagent; mixing tetrahydrofuran, (S)-vinyl chloride oxide and ferric acetylacetonate, dropwise adding the Grignard reagent, performing acidolysis ring opening, and performing methylation with methyl iodide and magnesium iodide to obtain an alpha-hydroxyl aromatic carboxylic acid derivative; and reacting with sodium chlorite, nitroxide free radicals and acetonitrile, and oxidizing to obtain the (S)-flurbiprofen. By introducing a chiral induction unit, effective transmission of chiral information is realized in a coupling stage, an original chiral center is not destroyed in a subsequent reaction, and a product is ensured to have a highly consistent configuration. According to the scheme, the technical problem that a method capable of remarkably improving the optical purity and yield of (S)-flurbiprofen is lacked in the prior art can be solved, and the method has good environmental friendliness and industrial application prospects.

The invention discloses an adsorption material for high-humidity and high-temperature iodine-containing aerosol and a preparation method thereof.According to the prepared adsorption material, polymers such as melamino-formaldehyde resin serve as a three-dimensional porous framework, and the adsorption material is prepared through a mild one-step solution processing method; an ionic polyimine network based on a lysine salt ionic liquid and carbonyl-rich polyvinylpyrrolidone are compounded on a skeleton in situ to form a porous adsorbent, and the porous adsorbent realizes efficient capture of elemental iodine (I2), methyl iodide (CH3I) and iodine aerosol through a synergistic mechanism of electrostatic induced adsorption and in-situ packaging and curing, so that the adsorption efficiency is improved, and the adsorption efficiency is improved. Under the harsh industrial conditions that the temperature is 100 DEG C or above and the relative humidity is 90% or above, the dynamic adsorption capacity to iodine reaches up to 160.7 wt%, the filtering efficiency is kept 99.8% or above, meanwhile, excellent iodine retention stability, recoverability and large-scale preparation potential are achieved, and an efficient, low-cost and practical solution is provided for treatment of radioactive iodine in nuclear waste gas.

The present application relates to a kind of preparation method of trifluoromethyl pyrazole compound, belong to the technical field of organic synthesis.The specific method is: (1) trifluoroacetyl ethyl acetate is first with hydrazine hydrate cyclization reaction and generates compound of formula III;(2) under the catalysis of base, compound of formula III is reacted with difluoromethylation reagent and generates compound of formula II;(3) compound of formula II is reacted with methylating agent and obtains compound of formula I;The difluoromethylation reagent is difluoro-monochloromethane or sodium difluoro-monochloroacetate;The methylating agent is chloromethane, bromomethane, iodomethane, dimethyl sulfate or dimethyl carbonate.The present application is prepared by changing reaction route, and the higher-priced raw material methylhydrazine is replaced, and isomer impurity is no longer generated in the product prepared.Not only raw material cost is reduced, but also the purity of product is improved.

The present invention discloses a multifunctional ionic porous organic cage material, its preparation method and chromium adsorption application, belonging to the technical field of porous organic materials. In the present invention, a porous organic cage material NKPOC-PH is synthesized using tetraaldehyde m-cyclocucurbit[4]arene and pyridine-3,5-dicarboxylic dihydrazide as reaction monomers, and then it is modified with methyl iodide to obtain ionic NKPOC-PH(I)Me. The present invention uses an easily modified porous organic cage as the substrate to construct triple synergistic adsorption sites of redox, coordination and electrostatics. Pyridine groups in the material are used as the introduction points of electrostatic sites, hydrazide linking groups as redox sites, and nitrogen-rich sites to adsorb dichromate ions through coordination. The obtained ionic porous cage can achieve an ultra-high chromium adsorption performance with a saturated adsorption capacity exceeding 1.3 g / g under acidic (pH = 3-4) aqueous phase conditions. The ionic porous organic cage material described in the present invention provides a new solution for adsorbing dichromate ions under aqueous phase conditions.

The invention belongs to the field of chemical reagent moisture detection, and particularly relates to a coulometry Karl Fischer reagent for aldehyde ketone moisture detection and a preparation method of the coulometry Karl Fischer reagent. The coulometry Karl Fischer reagent for aldehyde ketone moisture detection is prepared from the following components in parts by weight: 1 to 15 percent of imidazole, 1 to 15 percent of 2-methylimidazole, 25 to 70 percent of ethylene glycol monomethyl ether, 5 to 30 percent of trichloromethane, 2 to 30 percent of trifluoroethanol, 2 to 10 percent of sulfur dioxide, 1 to 10 percent of methyl iodide, 0.1 to 5 percent of tetrabutylammonium iodide and 0.1 to 5 percent of iodine. The method does not contain hydroxyl compounds, effectively inhibits the generation of side reactions in detection, ensures the detection accuracy, and improves the product stability and effectively shortens the instrument equilibrium time by adding iodomethane and tetrabutylammonium iodide.

This invention relates to a 1,1,2,2-tetrahydroperfluoroalkyl-substituted allyl quaternary ammonium salt, its preparation method, and its application, belonging to the field of flocculation treatment technology for high-salt industrial wastewater from natural gas purification. To address the problem that the synthesis of cationic polymer flocculants in existing technologies requires large amounts of surfactants and involves complex operations, this application employs a substitution reaction between 1,1,2,2-tetrahydroperfluoroalkyl iodide and N-methylallylamine; iodomethane is then reacted with the substitution reaction product to undergo quaternization, yielding a 1,1,2,2-tetrahydroperfluoroalkyl-substituted allyl quaternary ammonium salt; the 1,1,2,2-tetrahydroperfluoroalkyl-substituted allyl quaternary ammonium salt is polymerized with acrylamide to obtain a novel cationic polyacrylamide flocculant. The synthesis of cationic fluorocarbon-modified hydrophobic associative polyacrylamide flocculants using an aqueous solution polymerization method is simple, requires no surfactants, and experiments show that the prepared flocculant exhibits excellent flocculation performance.

The application discloses a kind of perovskite ink based on 3D printing and its preparation method and application, comprising, ammonium salt and lead iodide are dissolved in mixed organic solvent, after stirring, perovskite precursor liquid is obtained;Additive is added to perovskite precursor liquid, and perovskite ink is obtained after heating and stirring;Wherein, the ammonium salt includes one or two of methyl iodide ammonium and phenethyl amine iodide.This application further improves the crystallization quality and environmental stability of perovskite material by synergistically utilizing the defect passivation and in-situ encapsulation effect of PVP (polyvinylpyrrolidone), so that the obtained perovskite ink can be innovatively applied to 3D printing technology for the first time to prepare a perovskite direct X-ray detector, solves the practical situation that the viscosity of traditional perovskite solution is low and difficult to 3D print, and provides a new material preparation technology for the development of high-sensitivity, high-resolution perovskite direct X-ray imaging detector.

The invention provides an electroplating solution containing a novel additive and application of the electroplating solution in copper electroplating. The pyridine-2-acetaldehyde oxime methyl iodide is used as a novel copper electroplating additive (leveling agent) for the copper electroplating process, the cost is low, safety and no pollution are achieved, and the novel additive stably exists in the electroplating liquid. The novel additive is applied to the electrocoppering process, compact filling from bottom to top can be achieved, the surface of a plating layer is bright and flat, different adsorption behaviors of the additive can be regulated and controlled by regulating and controlling distribution of current density at interfaces of the inner surface and the outer surface of a micropore, and therefore the additive can be widely applied to high-density interconnection of electronic devices and can be applied to electrocoppering. And high-quality and high-stability signal transmission is satisfied.

The invention provides a synthesis method of N-substituted tropinone derivatives, and relates to the technical field of organic synthesis. The method provided by the invention comprises the step of reacting a tropinone compound with a fatty amine derivative in a solvent environment under the action of an acid accelerator to generate the N-substituted tropinone derivative in one step. Compared with a method that tropinone and a highly toxic reagent methyl iodide firstly react to generate a quaternary ammonium salt intermediate and then the quaternary ammonium salt intermediate and a fatty amine derivative are subjected to two-step synthesis under the action of alkali, the method is greener and more efficient, meanwhile, the used raw materials are cheap and easy to obtain, and the method is suitable for industrial production. The method has mild reaction conditions, is more suitable for large-scale production, has potential industrial value and has a wide application prospect.

The invention discloses a preparation method of a difluoromethyl reagent and application of the difluoromethyl reagent in synthesis of a nickel-catalyzed alkyl difluoromethyl compound. The preparation method of the difluoromethyl reagent comprises the following steps: in an inert gas atmosphere, adding potassium iodide, cuprous iodide and a water-containing dimethylformamide solution into a reaction container, heating, dropwise adding difluorochloroacetic acid of DMF (Dimethyl Formamide) into a reaction system, collecting difluoroiodomethane, and supplementing a 1-methyl-2-pyrrolidone NMP (N-Methyl Pyrrolidone) solution into the system. The invention provides a difluoromethyl reagent which is simple and convenient to operate, low in cost, high in yield, environment-friendly and beneficial to large-scale preparation and application of the reagent in synthesis of difluoromethyl substituted alkane compounds.

The present invention provides a composition comprising carbon dioxide (C02, R-744), difluoromethane (R-32) and trifluoroiodomethane (CF3I) and the use of such a composition as a working fluid in a heat transfer system, such as a refrigeration, heat pump or air conditioning system.

The invention belongs to the technical field of chemical synthesis of spices, and particularly relates to a synthetic method of vanillin and ethyl vanillin. Carrying out substitution reaction on catechol and methyl iodide to generate o-dimethoxybenzene 3; 3 and 1, 2-dichloromethyl methyl ether are subjected to formylation reaction to generate 3, 4-dimethoxybenzaldehyde 4; carrying out demethylation reaction on the 3, 4-dihydroxy benzaldehyde 5 and pyridine hydrochloride to generate 3, 4-dihydroxy benzaldehyde 5; carrying out substitution reaction on the 4-benzyloxy-3-hydroxybenzaldehyde 5 and benzyl bromide to generate 4-benzyloxy-3-hydroxybenzaldehyde 6; carrying out substitution reaction on the 4-benzyloxy-3-methoxyl / ethyoxyl benzaldehyde 6 and iodomethane / iodoethane to generate 4-benzyloxy-3-methoxyl / ethyoxyl benzaldehyde 7; 7 is reduced by hydrogen under the catalysis of palladium on carbon to generate vanillin / ethyl vanillin. Cheap catechol is adopted as a raw material, reaction conditions are mild, equipment requirements are not high, energy consumption is low, the problems that raw materials are not suitable to obtain, the price is high, separation is difficult, and three wastes are seriously generated in a traditional vanillin synthesis method are solved, and a new method is provided for synthesis of vanillin.

This invention relates to the field of perovskite solar cell technology, and discloses a method for preparing a low-dimensional perovskite thin film and its solar cell. The method for preparing the low-dimensional perovskite thin film is as follows: Step 1, weighing p-fluorophenylethylamine iodine, methyl iodide, lead iodide, formamidine iodide, methyl ammonium chloride, and lead chloride, and dispersing them in a mixed solution composed of dimethylformamide and dimethyl sulfoxide to obtain a low-dimensional perovskite precursor solution; Step 2, dropping the low-dimensional perovskite precursor solution onto a substrate, rapidly spin-coating for 10-20 seconds, and then subjecting it to reverse-order cooling annealing to obtain a low-dimensional perovskite thin film. This invention rapidly forms a low-dimensional perovskite wet film through high-speed spin-coating, followed by reverse-order cooling annealing, which not only enables the preparation of low-dimensional perovskite thin films with vertically grown multiphase structures, but also has good repeatability and reduces the manufacturing cost of battery devices. The reverse-order cooling annealing process described in this invention is simple and suitable for industrial production.

The invention relates to a chemical absorption liquid for removing methyl iodide and a preparation method thereof, and belongs to the technical field of underwriting. The chemical absorption liquid comprises the following raw materials in percentage by mass: 0.2-5% of sodium thiosulfate, 1-10% of long-chain alkyl trimethyl ammonium halide, 0-1% of sodium hydroxide, 0-10% of polyethylene polyamine and the balance of water. The number of long-chain carbon atoms in the long-chain alkyl trimethyl ammonium halide is greater than 8; the chemical absorption liquid is prepared by completely dissolving and uniformly mixing the components. According to the chemical absorption liquid, the long-chain alkyl trimethyl ammonium halide salt is introduced as a surfactant for the first time, has a solubilizing effect, and can greatly reduce the gas-liquid mass transfer resistance of methyl iodide, so that efficient absorption of radioactive and non-radioactive methyl iodide is realized; the chemical absorption liquid is not only suitable for normal temperature, but also suitable for high-temperature and high-humidity environments, and harmful gas can be purified in a solution washing or solution spraying mode.

The invention belongs to the technical field of chemical synthesis, and particularly relates to an indazole alkaloid derivative as well as a preparation method and application thereof. Comprising the following steps: under an alkaline condition, carrying out alkylation reaction on a compound a and an alkylating agent to obtain a compound b; performing demethylation reaction on the compound b and a demethylation reagent to obtain a compound c; carrying out glycosylation reaction on the compound c and sugar bromide to obtain a compound d; in a sodium methoxide and solvent system, removing acetyl on glycosyl of the compound d to obtain the indazole alkaloid derivative. Or carrying out oxidation reaction on the compound d and methyl iodide to obtain an intermediate; and removing acetyl on glycosyl of the intermediate in a sodium methoxide and solvent system to obtain the indazole alkaloid derivative. The invention provides a preparation method of an indazole alkaloid derivative, which is green, simple, convenient and efficient.

The invention relates to a main chain type polyaryl piperidine polymer as well as a preparation method and application thereof, and the preparation method comprises the following steps: dissolving a linear structure phenyl monomer, a strong bond energy linear structure phenyl monomer, 1, 2-diphenylethane and N-methyl-4-piperidone to obtain a precursor polymer solution; dropwise adding trifluoroacetic acid and trifluoromethanesulfonic acid to obtain a main chain type polyarene piperidine polymer precursor; and dissolving the polyaromatic piperidine, adding methyl iodide and potassium carbonate, reacting to obtain a quaternized main chain type polyaromatic piperidine polymer, and carrying out membrane treatment and alkali treatment processes to obtain the anion exchange membrane. By introducing the high-rigidity hydrophobic linear monomer with strong bond energy, the problem of mutual entanglement between linear main chains of a traditional polymer is solved, larger free volume and steric hindrance are provided, and high ionic conductivity and high alkali stability of the anion exchange membrane are realized; therefore, the water electrolysis performance of the anion exchange membrane electrolytic tank is further improved, and high-performance and high-stability electrolytic tank application is realized.

The invention belongs to the field of chemical homogeneous catalysis technology and chemical process, and provides an imidazolyl basic ionic liquid catalyst, and a preparation method and application thereof. The catalyst provided by the invention is obtained by carrying out quaternization reaction on N-methylimidazole and halogenated hydrocarbon (such as methyl iodide, bromoethane and the like) in a solvent to generate an intermediate halogen quaternary ammonium salt, and then carrying out ion exchange reaction on the intermediate, sodium hydroxide and an imidazole derivative (such as imidazole or 2-methylimidazole) in the solvent. The catalyst can be applied to catalysis of transesterification of methanol and propylene carbonate to prepare dimethyl cyclic carbonate, and has the advantages of efficient preparation process, mild reaction conditions, no metal, no pollution and simple catalytic system, and the highest yield of dimethyl carbonate can reach 95%.

The invention relates to a preparation method of a high-performance imidazolyl polyionic liquid membrane, and belongs to the technical field of ionic membranes. The method comprises the following steps: by taking N-methyl pyrrolidone as a solvent, reacting 2-phenylbenzimidazole or 2, 4, 5-triphenylimidazole with 4, 4-difluorodiphenyl sulfone, 1, 4-dibromobenzene, 4, 4-dibromodiphenyl or 4, 4-dibromodiphenyl terphenyl in a hydrothermal reaction kettle, washing and drying to obtain a product I; under the catalysis of super organic acid, reacting the product I with biphenyl or p-terphenyl and N-methyl-4-piperidone, washing and drying; adding methyl iodide in an alkaline environment for reaction, and washing and drying to obtain polyion liquid; and dissolving in dimethyl sulfoxide, coating on a glass plate, and drying to prepare the film. The polyionic liquid membrane prepared by the method has more ionic sites, and the ionic conductivity is remarkably improved. Tests show that the stability of the membrane is almost unchanged after 1500 hours under the conditions of 80 DEG C and 1M KOH, the wet mechanical property reaches 60 MPa or above, and the membrane has high chemical and mechanical stability and wide application prospects.

The application relates to the field of adsorption separation, in particular to a novel ion type bipyridyl group COF material and a preparation method and application thereof. The preparation method comprises the following steps: mixing 2,2',6,6'-tetramethyl-4,4'-bipyridine, 2,2'-bipyridine-5,5'-diformaldehyde, sodium hydroxide, trimethylbenzene and methanol to carry out reaction 1, and COF-CQWU-2 is obtained; the COF-CQWU-2 is placed in a mixed solution of iodomethane and chloroform to carry out reaction 2, and the novel ion type bipyridyl group COF material is obtained. The application successfully designs and prepares a novel ion type bipyridyl group COF material I@COF-CQWU-2 for removing perfluorinated compounds in water, the COF material has the advantages of simple preparation method, high adsorption capacity and recyclability, and the target of selectively adsorbing perfluorinated compounds from water is achieved.

The present invention relates to the field of reducing methane emissions from ruminants. In particular, the present invention relates to administering to a ruminant diiodomethane in an amount of at least 0.5 g diiodomethane per animal per day for reducing methane production resulting from digestive activities of said ruminant.

The invention belongs to the technical field of organic chemical synthesis, and particularly relates to a synthetic method of deuterated toluene-D3, which comprises the following steps: reacting deuterated iodomethane with magnesium to obtain a Grignard reagent deuterated methyl magnesium iodide; and then carrying out coupling reaction on the deuterated methyl magnesium iodide and bromobenzene under the catalysis of a nickel metal catalyst to obtain the deuterated toluene-D3. The synthesis method solves the problems of many byproducts, high cost and low utilization rate of deuterated raw materials when the existing toluene synthesis process is used for preparing semideuterated toluene, realizes efficient synthesis of high-purity deuterated toluene-D3, greatly reduces the generation of polymethyl compounds, and is short in production period and simple in post-treatment.

The invention discloses a preparation method of trifluoroiodomethane, which comprises the following steps: in an organic solvent, under the action of a catalyst, trifluoroacetic acid, elemental iodine and oxygen react to obtain trifluoroiodomethane, and the catalyst is a mixed catalyst of an amide compound and 4-dimethylaminopyridine. The method has the advantages of mild reaction conditions, high iodine atom utilization rate, small three-waste amount, suitability for industrial production and the like.