273 results about "Methanesulfonic acid" patented technology

The invention provides a low-temperature sodium ion electrolyte and a preparation method and application thereof, the low-temperature sodium ion electrolyte comprises a sodium salt, an organic solvent and an additive, the additive is triisopropyl silyl trifluoromethanesulfonate, and the sodium salt is sodium trifluoromethanesulfonate. Triisopropyl silyl trifluoromethanesulfonate molecules are used as an electrolyte additive for the low-temperature sodium ion electrolyte, so that further decomposition of sodium salt in the electrolyte can be effectively promoted, stable SEI containing more sodium fluoride is formed to promote mass transfer of sodium ions at low temperature, and finally, a sodium ion battery can effectively circulate at low temperature.

The invention discloses a synthesis process of chiral cyclic ether indole. The synthesis process comprises the following steps: reacting 4-bromobenzaldehyde with malonic acid under the catalysis of piperidine to generate olefin carboxylic acid CHP-1; carrying out condensation reaction to prepare CHP-2; under the catalysis of a copper reagent, carrying out Michael addition reaction to obtain CHP-3; preparing a chiral alcohol intermediate CHP-4 through a reduction reaction; trifluoromethanesulfonic acid is used, and a chiral ether intermediate CHP-5 is prepared through ring closing; reacting with protected hydrazine by using a copper ion catalyst to obtain an intermediate CHP-6; the method comprises the following steps: by taking alcohol as a solvent, adding strong acid, and removing a protecting group of hydrazine to obtain an intermediate CHP-7; and carrying out ring closing by taking lewis acid as a catalyst to obtain an indole product CHP-8. The use of a noble metal catalyst palladium is avoided, and the cost is greatly reduced. The chiral center is directly constructed through a chemical method, and SFC is not needed for resolution, so that the cost is remarkably reduced, and industrial production is successfully realized.

The invention belongs to the field of light-emitting diodes, and discloses a preparation method of a blue-light perovskite thin film containing a sulfonate additive and a light-emitting device of the blue-light perovskite thin film. According to the technical scheme, sulfonate functional additives (such as methyl methanesulfonate and the like) with the addition amount being 0.5%-1.5% of the molar weight of lead ions are introduced into a full-inorganic CsPb (BrxCl1-x) 3 perovskite precursor solution, the molar ratio of chlorine to bromine is controlled to be 0.5: 1-2: 1, and the thin film is formed through spin coating and annealing treatment at the temperature of 110-130 DEG C. Sulfonate groups in additive molecules are effectively coordinated with uncoordinated lead ions in perovskite crystals, so that defects of grain boundaries and surfaces are passivated, and a non-radiative recombination center is inhibited; meanwhile, accurate adjustment of the wavelength of the blue light is realized through regulation and control of the halogen proportion. A blue light perovskite light-emitting diode device prepared based on the modified thin film realizes high-brightness, high-efficiency and wavelength-adjustable blue light emission.

This invention belongs to the field of chemical synthesis and relates to a method for achieving deuterated methylation of a nucleophile. The invention provides a deuterated methylating reagent, which is obtained by reacting formic acid with deuterated methanol under acidic conditions, followed by a second reaction with thiaanthracite and trifluoromethanesulfonic acid. The nucleophile is then reacted with the deuterated methylating reagent described in claim 1, a base, and a solvent to obtain the deuterated methylated product. This invention also provides a method for achieving deuterated methylation of a nucleophile, which involves dissolving the nucleophile and 5-deuterated methyl-5H-thiophene-5-onium trifluoromethanesulfonate in a suitable solvent, adding a base, and then performing the deuterated methylation reaction at room temperature. In the method provided by this invention, the yield of the product after nucleophile methylation can reach 52% to 95%.

Provided is a method for producing a protected glycoside derivative, including reacting a sugar in which all hydroxyl groups of the sugar are protected by protective groups and protective groups of a hydroxyl group at a 1-position and a hydroxyl group at a 2-position are acyl groups, with a phenolic compound in the presence of at least one catalyst selected from the group consisting of trifluoromethanesulfonic acid and copper (II) trifluoromethanesulfonate, in which the phenolic compound is bonded to an anomeric position of the sugar and other hydroxyl groups of the sugar are protected.

The invention discloses a wide-voltage wide-temperature-range sodium-ion battery electrolyte and a preparation method and application thereof, and belongs to the technical field of sodium-ion battery electrolytes.The wide-voltage wide-temperature-range sodium-ion battery electrolyte comprises sodium salt, an organic solvent and an additive, the organic solvent is selected from one or more of ethylene carbonate, propylene carbonate, ethyl methyl carbonate, dimethyl carbonate, diethyl carbonate, ethylene glycol dimethyl ether, diethylene glycol dimethyl ether and triethylene glycol dimethyl ether, and the additive is selected from one or more of fluoroethylene carbonate, allyl-1, 3-propane sultone, 1, 3-propylene sultone, 1, 3-propylene sultone and 1, 3-propylene sultone. The additive is one or more of 1, 3-propyl sultone, methylene methane disulfonate, ethylene sulfate, trifluoromethanesulfonic anhydride, pentaerythritol bicyclic sulfate, tri (trimethylsilane) phosphate, tri (trimethylsilane) phosphite, tri (trimethylsilane) borate, acesulfame sodium and aluminum trifluoromethanesulfonate, and the additive is one or more of 2, 3-propylene sultone, methylene methane disulfonate, ethylene sulfate, trifluoromethanesulfonic anhydride, pentaerythritol dicyclosulfate, tri (trimethylsilane) phosphate, tri (trimethylsilane) phosphite, tri (trimethylsilane) borate, tri (trimethylsilane) phosphate and tri (trimethylsilane) borate. The electrolyte provided by the invention not only keeps high coulombic efficiency at low temperature, but also has good cycle stability at high temperature.

The application belongs to the field of fine chemical industry and environmental protection, and particularly relates to a method for preparing metal triflate by using high gravity reaction. The method comprises the following steps: 1, using trifluoromethylsulfonyl chloride and anhydrous HF gas as raw materials to generate trifluoromethylsulfonyl fluoride gas; 2, performing gas-liquid contact reaction of the trifluoromethylsulfonyl fluoride gas with an alkali metal solution to obtain a mixed solution; 3, performing solid-liquid separation on the mixed solution by using a filter press, and the liquid phase is a triflate salt solution; 4, drying the triflate salt solution by using a spray dryer to obtain a solid-phase product triflate salt. The method uses trifluoromethylsulfonyl chloride and anhydrous HF as raw materials to replace triflic acid in the traditional method, and utilizes high gravity reaction, so that the production cost is greatly reduced. The process is simple, the obtained product triflate metal salt has low impurity content, is superior to the industry standard, the process is zero emission, and has good economic value and social value.

The invention belongs to the technical field of polymer materials, and particularly relates to a conductive polymer material as well as a preparation method and application thereof. The conductive polymer material is prepared from the following components in parts by weight: 0.1 to 5 parts of ionic liquid, 0.1 to 10 parts of filler and 1 to 100 parts of polymer, the ionic liquid comprises at least one of organic salt and metal salt; the organic salt comprises at least one of p-toluenesulfonic acid triethylamine salt, p-toluenesulfonic acid tripropylamine salt, trifluoromethanesulfonic acid triethylamine salt and trifluoromethanesulfonic acid tripropylamine salt; the metal salt comprises at least one of potassium trifluoromethanesulfonate and sodium trifluoromethanesulfonate. The conductive polymer material prepared by the invention has the advantages of excellent conductivity, high transparency, good water resistance, good mechanical properties, good environmental stability, strong thermal stability and strong self-repairing ability.

The application discloses a triazine ring synthesis method, and belongs to the technical field of medical intermediate synthesis. The method is characterized in that 2-methylaminothiourea and dimethyl oxalate are used as raw materials, a nanometer catalyst of scandium triflate (Sc(OTf)3) or ytterbium triflate (Yb(OTf)3) is loaded on magnetic Fe3O4@SiO2, a cyclization reaction is carried out in an organic solvent, the catalyst is separated and recovered through an external magnetic field after the reaction is completed, and high-purity triazine rings are obtained through acidification, crystallization and drying of the reaction liquid. The catalyst has the advantages of high specific surface area, high catalytic activity, easy magnetic separation and recovery, and can be reused more than 6 times. The product yield can reach 93% to 96%, and the purity is greater than or equal to 99.6%. The method realizes green, efficient and low-cost synthesis of triazine rings.

The invention provides a purification method of a naphthalimide high-purity electronic-grade photoacid generator. The method solves the problem that photo-acid cannot be purified by traditional recrystallization or directly through ion exchange columns and other methods. The method comprises the following steps: firstly synthesizing and preparing 1, 3-diketone-2-hydroxy-6-(1-hexyne) benzisoquinoline, then reacting with triethylamine and trifluoromethylsulfonyl chloride to generate a crude product 1, 3-diketone-2-(1, 1, 1-trifluoromethyl) methanesulfonic ester-6-(1-hexyne) benzisoquinoline, removing impurities from normal hexane to obtain a pure product, sublimating the material into a gas phase by using a quartz vacuum sublimation instrument, and purifying to obtain the 1, 3-diketone-2-(1, 1, 1-trifluoromethyl) methanesulfonic ester-6-(1-hexyne) benzisoquinoline. And then passing through Pure MTS9500 amino phosphonic acid type chelating resin, and finally cooling in a quartz tube to obtain the high-purity electronic-grade photoacid generator. According to the invention, the stability is high, the metal ion content is low, the purification process is convenient to process, the product is used as a photoresist-level core main material, the product is widely applied in the fields of semiconductor photoresist, other imaging systems, photocureable coatings and the like, the market scale is continuously expanded, and the product is an indispensable key material in semiconductor manufacturing and other related fields.

The invention provides a photocatalytic method for degrading polystyrene into benzoic acid, which comprises the following steps: dissolving polystyrene in a mixed solvent containing acetonitrile and chlorobenzene, adding a catalyst FPQL-OMe and iron trifluoromethanesulfonate, and reacting under the conditions of oxygen atmosphere and illumination to generate benzoic acid, wherein the FPQL-OMe and the iron trifluoromethanesulfonate are synergistically used as a photocatalyst. The invention provides a method for photocatalytic degradation of polystyrene, which is mild in condition, rapid, efficient and high in selectivity, and particularly provides a photocatalytic method for degrading and converting polystyrene into benzoic acid at a relatively high yield.

The invention provides a preparation method of trifluoromethanesulfonic acid ionic liquid. According to the preparation method, trifluoromethanesulfonic acid, pyrrole salt, pyridinium salt, pyrazine salt and the like are subjected to substitution reaction, static layering, organic phase water washing and organic phase drying to achieve the purpose of generating the trifluoromethanesulfonic acid ionic liquid. The prepared trifluoromethanesulfonic acid ionic liquid is high in purity, good in yield and suitable for large-scale industrial application. The method provided by the invention is green and environment-friendly, and does not use harsh reaction conditions and organic solutions; meanwhile, the cost is low, the yield is high, and the purity of a crude product can reach 99.95% or above after the crude product is purified; and the method has the advantages of less required equipment, small occupied area and low investment, and can realize industrial production.

The invention belongs to the field of pharmaceutical chemicals, and relates to a preparation method of an anti-influenza virus derivative intermediate. According to the invention, a compound (a) and a compound (b) are taken as initial raw materials, and an alcoholic hydroxyl group is directly converted into an active intermediate by utilizing trimethylsilyl trifluoromethanesulfonate (TMSOTf), so that the tedious operation of firstly protecting the hydroxyl group and then carrying out substitution reaction in the traditional method is avoided, and a key intermediate (d) required for preparing the anti-influenza virus derivative can be obtained in one step. The method has the advantages of simplicity and convenience in operation, high yield, easiness in industrial amplification and the like, and is suitable for large-scale preparation of the anti-influenza virus medicine and pharmaceutically acceptable salts, esters or solvates thereof.

This invention provides a naphthopyrimidine-fused-acid sugar derivative, its synthesis method, and its application, belonging to the field of pharmaceutical technology. The naphthopyrimidine-fused-acid sugar derivative has the structures shown in formulas (I) to (IV). These compounds are obtained by one-step cyclization via a condensation reaction with 1,8-diaminonaphthalene in an organic solvent under the catalysis of a trifluoromethanesulfonate catalyst, using a propionyl-protected and p-toluenesulfonated sugar as the starting material. The preparation method is efficient and simple. The compounds of this invention exhibit good anti-proliferative activity against colon cancer tumor cells.

The present invention relates to catalyst composition for cyclic carbonate production from CO2 and epoxides under mild conditions, which can effectively catalyze the cyclic carbonate synthesis and provides good selectivity to cyclic carbonate, wherein said catalyst composition comprising:a) the metal complex as shown in structure (I):wherein,M represents transition metal atom;R1, R2, and R3 represent independent group selected from hydrogen atom, halogen atom, alkyl group, alkenyl group, alkynyl group, alkoxy group, amine group, phenyl group, benzyl group, cyclic hydrocarbon group comprising hetero atom, perfluoroalkyl group, or nitro group;R4 represents group selected from alkylene group, cycloalkylene group, or phenylene group;X represents group selected from hydrogen atom, acetate group, or triflate group; andb) the organic compound as the co-catalyst selected from compound containing nitrogen, compound of quaternary ammonium salts, or compound of iminium salts.

The invention belongs to the technical field of medicines, and discloses a betahistine mesylate oral soluble film agent for treating meniere disease, meniere syndrome and vertigo symptoms caused by vertigo and a preparation process thereof, the preparation process comprises the following steps: (1) adding betahistine mesylate into purified water; (2) adding glycerol, citric acid, sucralose, liquid orange-flavored essence and sunset yellow into the raw material medicine solution; (3) taking HPMC-E15, dispersing the HPMC-E15 in purified water, and adding HPC-LXF for thickening; (4) adding the medicine-containing solution into the blank glue solution; (5) degassing; (6) coating; and (7) cutting and packaging. Compared with a common tablet, the oral soluble film disclosed by the invention has a higher release rate, and can enter a body through a sublingual vein way in addition to a conventional gastrointestinal tract absorption way after being dissolved in an oral cavity, so that the bioavailability is increased; under the condition of stability acceleration, the compound has a better impurity level, and the preparation process is simple to operate, high in repeatability and suitable for industrial large-scale production.

The invention belongs to the field of preparation of conjugated microporous polymers, and particularly discloses a method for synthesizing a conjugated microporous polymer through metal-free catalysis and application of the conjugated microporous polymer. According to the method, triphenylamine (TPA) is taken as a monomer, N-iodosuccinimide (NIS) is introduced to serve as an iodination reagent, the synergistic catalysis of trifluoromethanesulfonic acid (TfOH) is combined, and the synthesis of the conjugated microporous polymer (TPA-CMPs) is successfully realized under the condition that a metal catalyst is not needed. The obtained CMPs material has ultrahigh specific surface area and excellent iodine adsorption capacity, no metal participates in the whole process, the problems of high pollution, high cost and the like in the traditional metal catalytic synthesis process of CMPs are effectively solved, a new thought is provided for green chemical synthesis and functional material development, and the CMPs material has good application prospects in iodine vapor adsorption and iodine adsorption. The catalyst can also be applied to the fields of catalytic carriers, gas separation, environment restoration and the like and has wide application prospects.

The present invention relates to the use of a trivalent chrome plating bath composition for the electrodeposition of a hard chrome layer with a thickness of 1 µm or more, the composition comprising (A) trivalent chromium ions in an amount of 5-40 g / l, (B) at least one anion selected from sulfate, chloride, bromide and methanesulfonate, (C) at least one carboxylate ion selected from formate and acetate, (D) at least one buffer substance selected from ammonia, boric acid, carboxylic acids with 2 to 8 carbon atoms other than component (C) and salts thereof, and aluminium salts, and (E) 0.01 to 100 g / l of at least one specific compound which comprises a sulfonate group and a sulfide or disulfide group. Other aspects of the invention relate to a hard chrome plating process, a hard chrome plating layer and a hard chrome plated article.

This invention relates to the field of electrochemical energy storage technology, specifically disclosing a locally high-concentration electrolyte and its preparation method. The electrolyte uses methoxytrimethylsilane and 2,2,2-trifluoroethyl methanesulfonate as the base solvent, ethoxy(pentafluoro)cyclotriphosphazene or 1,1,1,3,3,3-hexafluoroisopropyl methyl ether as the functional diluent, and is compounded with specific proportions of sodium bis(trifluoromethanesulfonyl)imide, sodium hexafluorophosphate as the main salt, and vinyl sulfate and siloxane polymer additives. Through the synergistic effect between the components, while ensuring high ionic conductivity and excellent wettability, it also significantly improves the stability of the negative electrode interface, providing key material support for the development of high-energy-density negative electrode-free sodium metal batteries, and showing broad application prospects in large-scale energy storage, portable electronic devices, and other fields.

The invention provides a preparation method of fluorodinitrile. The preparation method comprises the following steps: reacting trifluoromethanesulfonic anhydride with fluoroalkyl alcohol to obtain fluoroalkyl substituted trifluoromethanesulfonate; then, the fluoroalkyl substituted trifluoromethanesulfonate reacts with malononitrile, and fluorodinitrile is obtained; the reaction raw materials used in the method are easy to obtain and low in price, the target product conversion rate is high, byproducts are few, the purity of the prepared fluorodinitrile is as high as 99%, the yield is higher than 84%, the content of chloride and bromide ions is lower than 5 ppm, and the fluorodinitrile can meet the requirement of serving as an electrolyte additive.

The invention provides a reflective integrated electrochromic device. The reflective integrated electrochromic device sequentially comprises a first substrate layer, a working electrode layer, an integrated electrochromic layer, a counter electrode layer and a second substrate layer, the integrated electrochromic layer comprises a metal source compound; the metal source compound is selected from silver chloride, silver acetate, silver nitrate, silver perchlorate, silver sulfate, silver cyanide, silver sulfide, silver hexafluorophosphate, silver tetrafluoroborate, silver tetrachloroaluminate, silver trifluoromethanesulfonate, silver bis (trifluoromethane sulfonimide), copper fluoride, copper chloride, copper cyanide, copper sulfate, copper acetate, copper aluminate, cuprous fluoride, cuprous chloride, cuprous cyanide, gold chloride and gold cyanide; the catalyst is one or more of gold sulfide, gold chloride, gold (II) sulfide, nickel chloride, nickel sulfate, cobalt chloride and platinum chloride. The device has a relatively large transmittance / reflectivity dynamic change range, can perform light and heat management at the same time, and can keep a stable coloring or fading state for one month or even several months under a no-load condition.

The invention discloses a method for preparing 2, 2-bis (2-tetrahydrofuryl) propane, and belongs to the technical field of organic synthesis. The method comprises the following steps: with furan and acetone as starting raw materials, firstly carrying out condensation reaction under the action of an organic strong acid catalyst to generate 2, 2-bis (2-furyl) propane, and then carrying out catalytic hydrogenation reduction to obtain a target product. The organic strong acid is selected from one or more of p-toluenesulfonic acid, trifluoromethanesulfonic acid, methanesulfonic acid, ethanesulfonic acid and benzenesulfonic acid. The organic strong acid is adopted to replace a traditional inorganic strong acid catalyst, the problems of equipment corrosion, post-treatment difficulty, low yield and the like are solved, the reaction condition is mild, the condensation reaction yield can reach 90% or above, the overall yield is high, the technological operation is simple, and the method is suitable for industrial production.

A polymer comprising pyridinium salt moieties, wherein the polymer has the following structure: In this structure, R1 and R6 are each N. At least a portion of R2 and R7 groups in the polymer are each negatively charged counterions selected from the group consisting of carboxylates, nitrates, nitrites, azides, metasilicates, tetraborate, perborates, boronates, oxalatob orates, metaborates, phosphorus-containing anions, halides, sulfates, SO4 -2, HSO4 -1, thiosulfate, dithionite, metabisulfite, persulfate, methanesulfonate, dioctyl sulfosuccinate, 3-sulfopropyl ethoxylate laurylphenyl ether, and combinations thereof. R3, R4, R8, R9, R11, R13, R14, R15, and R16 are each selected from the group consisting of H and groups including one or more carbon atoms. R5 and R10 are any group including one or more carbon atoms. The n is an integer from 2 to about 100,000.

LSD derivative compounds and polymorphs thereof, compositions and treatment of diseases and disorders are described herein, the compounds having the structure of Formula I' selected from,,,, or combination thereof, wherein the acid is selected from formic acid, malic acid (D and L), pyroglutamic acid (D and L), citric acid, phosphoric acid, aspartic acid (D and L), methane sulfonic acid, ethane sulfonic acid, benzenesulfonic acid, sulfuric acid, glutamic acid (D and L), ascorbic acid (D and L), isoascorbic acid (D and L), hydrochloric acid, hydrobromic acid, ethane sulfonic acid, tartaric acid (D and L), or meso-tartaric acid.

The application discloses a preparation method and application of a bimodal linear polyethylene chromium carbene catalyst, and belongs to the technical field of chemical synthesis. The preparation method comprises the following steps: 1-nitro-2-aromatic sulfide benzene is prepared by taking 1-fluoro-2-nitrobenzene, aromatic mercaptan and potassium tert-butanolate as raw materials; 1-amino-2-aromatic sulfide benzene is prepared by taking 1-nitro-2-aromatic sulfide benzene and hydrazine hydrate as raw materials; 8-hydroxyimidazol[1,5-alpha] quinolinium salt is prepared by taking 1-amino-2-aromatic sulfide benzene, 8-hydroxyquinoline-2-methyl formaldehyde, formaldehyde solution and hydrogen chloride-1,4-dioxane solution as raw materials; and finally, the reaction is carried out by taking 8-hydroxyimidazol[1,5-alpha] quinolinium salt, silver trifluoromethanesulfonate, sodium bis(trimethylsilyl) amide and chromium trichloride as raw materials to obtain the bimodal linear polyethylene chromium carbene catalyst. According to the preparation method, the catalyst is effectively prevented from being poisoned, the catalytic activity of the catalyst is improved, and the catalyst has good thermal stability.

The disclosure belongs to a field of environmentally friendly new materials, specifically relating to a modified covalent organic framework for simultaneous adsorption of multiple heavy metal ions, along with its preparation method and applications. The preparation steps for the material are as follows. 1,3,5-tris(4-aminophenyl)benzene and 2,5-dihydroxyterephthalaldehyde are dissolved in a mixed solvent and allowed to stand and react at room temperature to obtain a mixed solution. Scandium trifluoromethanesulfonate is added to the obtained mixed solution, and allowed to stand and react at the room temperature. After completion of the reaction, the insoluble matter is separated from the reaction solution, and the insoluble matter is washed and dried to obtain a covalent organic framework substrate. A neutral solution is used to perform an ultrasonic modification treatment on the covalent organic framework substrate prepared, and then the modified substrate is washed and dried to obtain a modified covalent organic framework.

The present invention provides a novel dibenzothiophenium salt compound and a method for producing the same. The present invention also provides a photoacid generator containing the dibenzothiophenium salt compound, a resist composition containing the photoacid generator, a method for forming a resist pattern using the resist composition, and the like. The present invention relates to a compound represented by chemical formula (I), a photoacid generator containing the compound, a resist composition containing the photoacid generator, and a method for forming a resist pattern using the resist composition. (In the formula, R1 and R2 are the same or different and each represent a hydrogen atom, a halogen atom, -CF3, -SO2R3, an alkyl group having 1-10 carbons, -OH, a polymerizable group selected from formula (S-1) to formula (S-4), or an acid-reactive group selected from formula (R-1) to formula (R-7). R3 represents -CF3, -CF2CF3, an alkyl group having 1-10 carbons, or a phenyl group. [A]- represents a trifluoromethanesulfonic acid anion (TfO-) or a halide ion.) (In the formulae, R1a represents a hydrogen atom or a methyl group, and Y represents a single bond or an alkylene group having 1-3 carbons.) (In the formulae, Y is as described above. R51 to R53 may be the same or different, and each represent a hydrogen atom, an alkyl group having 1-20 carbons, an alkenyl group having 2-8 carbons, or an aromatic group having 4-18 carbons, or R 51 and R52 may be linked to each other to form, together with the carbon atoms to which these are bonded, an aliphatic hydrocarbon ring having 3-20 carbons. R54 and R55 are the same or different, and each represent a hydrogen atom or an alkyl group having 1-6 carbons. R56 represents an alkyl group having 1-20 carbons or an alicyclic hydrocarbon group having 3-20 carbons. -CH2- contained in the alkyl group, the aliphatic hydrocarbon ring, and the alicyclic hydrocarbon group may be substituted with -O- or -S-, and d represents an integer from 0 to 4. A case in which R51 to R53 are all hydrogen atoms in formula (R-1), formula (R-3), and formulae (R-5) to (R-7) is excluded.)

The application discloses a synthesis method of 2-aryl-4-phosphoryl-4H-chromene compounds, which comprises the following steps: dissolving 2-hydroxychalcone, diaryl phosphine oxide and mercury triflate in an organic solvent, and reacting at 80-100 DEG C; after the reaction is completed, 2-aryl-4-phosphoryl-4H-chromene compounds are obtained through separation and purification; the synthesis method is simple, the reaction condition is mild, and the operation is convenient; the raw materials are easy to prepare; the reaction byproduct is water; and the method has the advantages of high atomic economy, green environmental protection and the like.

This invention discloses a method for synthesizing monosubstituted sulfonylamidinium compounds. In an air atmosphere, using commercially available primary sulfonamides and nitriles as substrates, inexpensive trifluoromethanesulfonic anhydride as a catalyst, and trifluorotoluene as a solvent, the product can be efficiently obtained. Compared with existing technologies, this method has the following advantages: inexpensive and readily available reactants; no need for cumbersome synthesis methods; simple reaction system; high atom economy with 100% atom utilization; broad substrate range, compatible with various functional groups; and simple operation.

The invention discloses an antibacterial bamboo fiber for traceless underwear and a preparation method of the antibacterial bamboo fiber, and relates to the technical field of textile fibers. When the antibacterial bamboo fiber for the traceless underwear is prepared, bamboo pulp reacts with 3-aminopropyltrimethoxysilane to prepare modified bamboo pulp; the preparation method comprises the following steps: copolymerizing acrylonitrile and dibutyl (allyl) phosphine to prepare pre-modified polyacrylonitrile; enabling the pre-modified polyacrylonitrile to react with pyrimidine-2-yl methyl methanesulfonate, so as to obtain modified polyacrylonitrile; the modified polyacrylonitrile and the modified bamboo pulp are mixed and then subjected to wet spinning, then the mixture is immersed in deionized water, and polyacrylonitrile modified bamboo fibers are prepared; and immersing the polyacrylonitrile modified bamboo fiber into a silver plating solution to prepare the antibacterial bamboo fiber for the traceless underwear. The antibacterial bamboo fiber for traceless underwear prepared by the invention has good antibacterial, flame-retardant and moisture-absorbing properties.