886 results about "Triflic acid" patented technology

The room temperature ionic liquid containing unsaturated double bond has the general expressino of A+B-, where A+ contains R1 being hydroxyl with 1-4 carbon atoms and R2 containing 2-20 carbon atoms and at least one double bond; and B- is one of anions, including chlorate radical, bromate radical, iodate radical, acetate radical, sulfate radical, nitrate radical, tetrafluorobromate radical, etc. Its preparation is to mixture and react olefin halide R1X and N-alkyl imidazole to obtain ionic liquid dialkyl imidazolium halide. The present invention also relates to the application of the ionic liquid in dissolving cellulose and preparing cellulose derivative.

New crosslinked polysaccharides useful as absorbents or superabsorbents alone or in a mixture are obtained by reacting polysaccharides (preferably containing carboxylates groups) with at least one crosslinker selected in the group constituted by activated polyethylene glycols such as for example halogenated (Cl, Br, I), mesylated, tosylated, or triflated activated polyethylene glycols.

The invention provides a purification method of abiraterone acetate. The method comprises the following steps of: reacting trifloromethanesulfonic acid serving as a salt forming reagent with crude abiraterone acetate to obtain dry and easily-purified abiraterone acetate trifluoromethanesulfonic salt with the purity of over 97 percent; and performing a free reaction on the abiraterone acetate trifluoromethanesulfonic salt without a purification step so as to obtain abiraterone acetate, wherein the purity of the abiraterone acetate obtained by the free reaction is over 97 percent. The method simplifies purification process, saves reagent and is easy to operate and suitable for industrial production.

The invention discloses a covalence triazine organic polymer visible-light-driven photocatalyst and the preparing method and application thereof and belongs to the technical field of material preparation and photocatalysis. According to the method, normal-temperature liquid-phase polymerization is adopted, para-phthalonitrile serves as the monomer, trimerization is conducted under the catalysis of trifluoromethanesulfonic acid, and then the covalence triazine organic polymer visible-light-driven photocatalyst is prepared. By means of the photocatalyst, visible-light reaction is achieved, hydrogen production through water photolysis can be achieved without obvious inactivation, and organic pollutants in waste water can be effectively degraded. The preparing condition is mild, production cost is low, yield is high, actual production requirements are met, and application potential is great.

The invention relates to an effective preparation method of a medicine, namely, Everolimus. The preparation method comprises: reacting rapamycin, diisopropylethylamine and 2-(tert-butyldiphenylsilyl)ethoxytrifluoromethanesulfonate at 50 to 60 DEG C in toluene, and obtaining the intermediate represented by a formula (1) by separation by column chromatography; and reacting the intermediate with hydrogen fluoride-pyridine at 0 DEG C in tetrahydrofuran, reacting at room temperature and obtaining Everolimus represented by the formula (2) by separation by column chromatography. The preparation method has the advantages that: the yield is high; and the part of rapamycin serving as an initiative raw material can be recycled.

A radiation-sensitive resin composition comprising (A) an acid-dissociable group-containing polysiloxane and (B) a photoacid generator containing trifluoromethane sulfonic acid or a compound which generates an acid of the following formula (I),

wherein Rf individually represents a fluorine atom or a trifluoromethyl group, and Ra represents a hydrogen atom, a fluorine atom, a linear or branched alkyl group having 1-20 carbon atoms, or a linear or branched fluoroalkyl group having 1-20 carbon atoms, a substituted or unsubstituted monovalent cyclic hydrocarbon group having 3-20 carbon atoms, or a substituted or unsubstituted monovalent cyclic fluoro-hydrocarbon group having 3-20 carbon atoms. The radiation-sensitive resin composition of the present invention exhibits superior resolution, while maintaining high transparency to radiations and high dry etching resistance. The resin composition thus can greatly contribute to the lithography process that will become more and more minute in the future.

Disclosed is a liquid chemical for forming a water-repellent protecting film at least on a surface of a recessed portion of an uneven pattern at the time of cleaning a wafer having a finely uneven pattern at its surface and containing silicon at least a part of the uneven pattern. This liquid chemical contains a silicon compound A represented by the general formula: R¹_aSi(H)_bX_4-a-b and an acid A, the acid A being at least one selected from the group consisting of trimethylsilyl trifluoroactate, trimethylsilyl trifluoromethanesulfonate, dimethylsilyl trifluoroactate, dimethylsilyl trifluoromethanesulfonate, butyldimethylsilyl trifluoroactate, butyldimethylsilyl trifluoromethanesulfonate, hexyldimethylsilyl trifluoroacetate, hexyldimethylsilyl trifluoromethanesulfonate, octyldimethylsilyl trifluoroactate, octyldimethylsilyl trifluoromethanesulfonate, decyldimethylsilyl trifluoroacetate and decyldimethylsilyl trifluoromethanesulfonate.

Disclosed is a method for producing graphene functionalized at its edge positions of graphite. Organic material having one or more functional groups is reacted with graphite in reaction medium comprising methanesulfonic acid and phosphorus pentoxide, or in reaction medium comprising trifluoromethanesulfonic acid, to produce graphene having organic material fuctionalized at edges. And then, high purity and large scaled graphene and film can be obtained by dispersing, centrifugal separating the functionalized graphene in a solvent and reducing, in particular heat treating the graphene. According to the present invention graphene can be produced inexpensively in a large amount with a minimum loss of graphite.

The invention discloses a two-photon fluorescent probe capable of targeting mitochondria and a preparation method and application of the probe. The structure of the two-photon fluorescent probe is shown as a formula I, wherein R represents a conjugated structure, R' represents alkyl or aryl, R'' represents hydrogen, methyl or methoxy, X represents halogen anions or bi-trifluoromethane sulfonimideanions or hexafluoro-phosphoric acid anions or tetra-fluoroboric acid anions or trifluoromethanesulfonic acid anions. The compound has stronger two-photon excitation fluorescence, a good aggregation-induced luminescence effect, a great mitochondrial targeting function and excellent photoinduced singlet oxygen generation capability.

The invention discloses a silicon-based cathode high-voltage lithium ion battery which comprises a negative pole, positive pole, a diaphragm arranged between the negative pole and the positive pole and a nonaqueous electrolyte. An active ingredient of the negative pole is lithium transition metal oxide, an active ingredient of the positive pole is a substance based on Si, the diaphragm is a ceramic diaphragm, the nonaqueous electrolyte comprises a nonaqueous organic solvent, lithium salt and additives, and the additives include fluoroethylene carbonate (FEC), trifluoromethanesulfonic acid (Li SO3F3) and a dinitrile compound. Compared with the prior art, the silicon-based cathode high-voltage lithium ion battery has the advantages that due to synergistic effect generated by combined use of the three additives, an SEI film formed on the surface of an electrode is more stable and compact, and physical and chemical structural stability of the surface of a silicon-carbon cathode is improved, so that a silicon-carbon cathode battery has high high-temperature storage performance and circulating performance.

There is provided a process for producing an α-substituted ester by reaction of a fluorosulfuric acid ester of α-hydroxyester with a Grignard reagent in the presence of a zinc catalyst. It is newly found that the reaction for production of α-substituted esters, in which the raw reaction substrate is limited to expensive trifluoromethanesulfonic acid esters, can proceed favorably with the use of fluorosulfuric acid esters suitable for mass-production uses. By the use of the fluorosulfuric acid ester high in optical purity, it is possible to obtain the α-substituted ester with high optical purity upon inversion of the asymmetric carbon configuration. The process of the present invention can solve all of the prior art problems and can be applied for industrial uses.

A process for the production of hydrocarbons by dehydrating primary alcohols with a dehydration catalyst of trifluoromethansulfonic acid is disclosed. The hydrocarbons so produced have fewer undesired secondary reactions. Accordingly, cosmetic and cleaning compositions incorporating the hydrocarbons produced by way of the process are also disclosed.

The invention relates to a main material of a crosslinking polymer film in the technical field of high molecular material and a preparation method and a using method thereof. Through Michael addition polymerization, the invention obtains hyper branched polyamide containing an end double bond. By the protonation of a tertiary amine unit, the introducing of anion ligand and thermal initiation and self crosslinking of the end double bond, the main material of the crosslinking polymer film can be prepared. The components of the material the contents of the weight percentage are as follows: 12 to 19wt percent of amide group, 17 to 29wt percent of methylene, 2 to 3wt percent of protonated tertiary amine and 52 to 66wt percent of fluoroform sulfonate radical. The material of the invention can not only efficiently enrich object dye molecules from an aqueous solution, but also can efficiently enrich precious metal ions from the aqueous solution and restore the metal ions to be internally embedded metal nanoparticles in position. The invention has simple operation and is environment friendly; therefore, the invention can be applied to the treatment of waste water containing dye, the recycling of precious metal or metal-catalyzing and other fields.

A nonaqueous electrolytic solution containing magnesium ions which shows excellent electrochemical characteristics and which can be manufactured in a general manufacturing environment such as a dry room, and an electrochemical device using the same are provided. A Mg battery has a positive-electrode can 1, a positive-electrode pellet 2 made of a positive-electrode active material or the like, a positive electrode 11 composed of a metallic net supporting body 3, a negative-electrode cup 4, a negative electrode 12 made of a negative-electrode active material 5, and a separator 6 impregnated with an electrolytic solution 7 and disposed between the positive-electrode pellet and the negative-electrode active material. Metal Mg, an alkyl trifluoromethanesulfonate, a quaternary ammonium salt or/and a 1,3-alkylmethylimidazolium salt, more preferably, an aluminum halide are added to an ether system organic solvent and are then heated, and thereafter, more preferably, a trifluoroborane-ether complex salt is added thereto, thereby preparing the electrolytic solution. By adopting a structure that copper contacts the positive-electrode active material, the electrochemical device can be given a large discharge capacity.

The invention relates to triazine-containing benzoxazine, a triazine-containing benzoxazine polymer, and a preparation method thereof. The preparation method is characterized by: adopting cyanophenol as a raw material; adopting trifluoromethanesulfonic acid or trifluoroacetic acid as a catalyst; synthesizing triazine-containing trihydric phenol (TP for short) in dichloromethane or chloroform or acetone at a common temperature; adopting the synthesized TP, formaldehyde and aminated compounds as reaction raw materials; adopting a alkali as the catalyst, and carrying out a reaction in a alcohol solvent or a ether solvent to synthesize a series of triazine-containing polycyclic benzoxazine monomers (BZ for short) which have not been reported; heating the BZ to carry out a ring-opening polymerization to form polybenzoxazine (PBZ for short). A structural formula of the monomer BZ is shown as follow, substituents R are shown in the specification. The synthesized novel monomer provided by the present invention contains a triazine ring structure, such that the triazine content in the PBZ resin can be substantially raised so as to notably improve heat resistance, residual carbon rate, fire resistance property and wave transmission property of the PBZ.

The invention discloses a new green synthesizing process for a ketocoumaran compound. The synthesizing process comprises the following steps: in the absence of a solvent, performing condensation reaction of a mandelic acid compound and hydroquinol under the action of a little amount of acid catalyst to obtain a full condensed intermediate, wherein the acid catalyst is selected from one of 10 to 37 percent concentrated hydrochloric acid, 60 to 98 percent concentrated sulfuric acid, fuming sulfuric acid, 80 to 98 percent phosphoric acid, polyphosphoric acid, p-toluenesulfonic acid, trifloromethanesulfonic acid, benzoic acid, ammonium acetate, ammonium chloride, KF, TiC14, NiCl2, CuSO4, Cu(OAc)2, ZnCl2, AlCl3, Fe(NO3)3, FeCl3 and SnCl2; and performing oxidation reaction of full condensed intermediate under the action of an oxidant to obtain a final product ketocoumaran compound. The synthesizing process of the invention is simple, and has low energy consumption and little environmental pollution.

A preparation method of a covalent triazine framework material with rich defects comprises the following steps: mixing 1,4-dicyanobenzene with 4,4-biphenyldicarbonitrile, adding trifluoromethanesulfonic acid, performing stirring in a -5-5 DEG C environment under the protection of an inert gas for 1-2 h, raising the temperature to 80-120 DEG C, keeping the temperature for 10-30 min to obtain a transparent solid substance, grinding the transparent solid substance by a mortar, washing the ground solid with ethanol and water, and drying the washed solid to obtain the material. A manner for introducing a defect into a covalent triazine framework is provided by the invention to make the covalent triazine framework have rich adsorption active site, so the obtained material can be used as a highly active adsorbent. The material used as the adsorbent has the advantages of green and environmentally friendly preparation method and low cost; and the material contains rich defect sites as high energy sites for adsorbing pollutants, so the covalent triazine framework can adsorb aromatic substances at a very high adsorption rate and a very high adsorption capacity.

This invention discloses a method for catalyzing alcohol acid esterification by using an ionic liquid. The ionic liquid A+B- is used as catalyst and solvent, wherein: A+ has the following structural formula, and R could be an alkyl group or alkene group with more than one carbons; B- is selected from the following negative ions: chlorin, bromine, iodine, acetate, sulfate radical, hydrogensulfate radical, phosphate radical, hydrogen phosphate radical, nitrate radical, tetrafluoroboric radical, hexafluorophosphoric radical, p-toluenesulfonic radical, and trifluoromethanesulfonic radical; the catalyst amount added is 0.01%-50% of the total mole of the alcohol and acid added, reaction temperature 20-140Deg C, normal pressure reaction time 0.5-12h.

The invention relates to a morpholine quaternary ammonium salt ionic liquid and a preparation method. The ionic liquid has the following structural general formula: A ⁺B^-, wherein, the A⁺ has the structural general formula as the right, in the general formula: R₁ is the saturated or unsaturated alkyl containing 1 to 4 carbon atoms, and the R₂ is in line with the following rules: a) at least 2 carbon atoms are contained; b) not more than 20 carbon atoms are contained; the B^- is selected from one the following anions: chlorine, bromine, iodine, acetate, sulfate, nitrate, tetrafluoroborate, thiocyanate, hexafluorophosphate, p-toluenesulfonic and trifluoromethanesulfonic.