43 results about "Fluroxene" patented technology

The invention relates to the dye printing technology of cotton fiber and blend fabric, in particular to a dye printing processing method of cotton fiber and blend fabric. A double blade coating machine is adopted, the dyeing and the printing are simultaneously realized on one machine; invention comprises the following steps: firstly, the pad dyeing is performed to the textile in colored or colorless padding dye liquor, the padding liquor comprises the following components according to the weight percentage: penetrating agent organosilicon fluroxene poly occupies 0 to 2 percent, branched chain aliphatic condensed alcohol ethylene oxide occupies 1 to 2 percent, softening agent organosilicon occupies 0 to 2 percent, modified 2D resin occupies 0 to 8 percent, water is quantified to 100 percent; secondly, the single side dyeing and drying of the textile is performed through a first blade, thirdly, color pastes which have more than two colors and can not be mixed and dissolved are scraped to the textile and the textile is dried. The invention cause two styles of synthesis dyeing and printing of textile can be completed on single coating equipment, the process is simple, and no waste water is discharged.

The invention discloses a synthesis method of 1-cyclopropyl-4-oxo-7-fluoro-8-methoxy-1,4-dihydroquinolyl-3-carboxylic acid. The synthesis method comprises the following reaction steps: reacting m-difluorophenyl with an organolithium reagent, reacting an obtained aryllithium intermediate with borate, quenching to obtain 2,6-difluorophenylboronic acid and 2,6-difluorophenylborate, reacting 2,6-difluorophenol obtained through oxidation with a methylating reagent, reacting the obtained 2,6-difluorophenylmethyl ether with the organolithium reagent, reacting the obtained corresponding aryllithium intermediate with carbon dioxide, reacting the obtained product with an acylchlorinating reagent to obtain 2,4-difluoro-3-methoxy benzoyl chloride, and performing cyclization, hydrolysis and the like to obtain the 1-cyclopropyl-4-oxo-7-fluoro-8-methoxy-1,4-dihydroquinolyl-3-carboxylic acid. The synthesis method has the advantages as follows: raw materials are easy to obtain; the yield in each step is high; the atom economy is high; the synthesis method is suitable for industrial application.

The invention provides a method for synthesizing 2,3,4,5,6-pentafluorophenol. The method comprises the steps of (a) carrying out Ullmann reaction on bromopentafluorobenzene as shown in a formula (I) and benzyl alcohol in an inert gas atmosphere under the action of a catalyst cuprous iodide, a ligand and an inorganic base at 100-120 DEG C, and then generating a compound (II), and (b) reacting the compound (II) in an alcoholic solvent in the presence of hydrogen under the action of a palladium carbon catalyst at 20-50 DEG C, and removing the benzyl group, thereby obtaining a compound (III), namely, the 2,3,4,5,6-pentafluorophenol. The method is simple, low in cost and high in yield, and applicable to industrial production. The synthetic route of the method is as shown in specification.

The invention relates to the field of a liquid-crystal intermediate of an electronic material, in particular to a preparation method of a fluorine-containing liquid-crystal intermediate 3, 5-difluoro-4-trifluoro-methoxyl bromobenzene. The 3,5-difluoro-4-trifluoro-methoxyl bromobenzene is prepared from 2,6-difluoro phenol by bromine substitution and coupling. The preparation method of the 3,5-difluoro-4-trifluoro-methoxyl bromobenzene has the advantages of mild reaction condition, strong operability, high atom economy, simple process and high-purity and stable-quality obtained product and is beneficial to the realization of industrialization, has and completely accords with the use requirement as the liquid-crystal intermediate.

The invention discloses 4-amino-3-fluorophenol and a synthesizing method thereof.The synthesizing method comprises the steps that fluoroaniline serves as a raw material, a diazo-reaction is carried out first, then a fluorine resolving reaction is carried out, and a white diazonium salt solid is obtained; then, the white diazonium salt solid is subjected to a hydrolysis reaction, and 3-fluorophenol is obtained; 3-fluorophenol is then subjected to a nitration reaction, and 3-fluorine-4-nitrophenol is obtained; then, obtained 3-fluorine-4-nitrophenol is reduced, and 4-amino-3-fluorophenol is obtained.According to 4-amino-3-fluorophenol and the synthesizing method thereof, ionic liquid serves as a reaction solvent, the volatility is low, environment is easily protected, and no harm is caused to the human body; in the reaction of reducing nitro groups into amino groups, the microwave heating mode is adopted, so that the reaction efficiency is greatly improved, and the product yield is increased.

The invention discloses a preparation method of octadecanedioic acid mono-tert-butyl ester-PFP. The preparation method comprises the steps of preparation of a compound 1 and preparation of octadecanedioic acid mono-tert-butyl ester-PFP; wherein the preparation method of the octadecanedioic acid mono-tert-butyl ester-PFP comprises the following steps: A1, adding a compound 1, pyridine and DMF into a reaction kettle, starting stirring for completely dissolving the components, dropwise adding trifluoroacetic acid pentafluorophenol ester, separating out a solid, and reacting the components; A2, post-treatment: carrying out suction filtration on the reaction liquid, collecting light yellow or white solids, carrying out DMF pulping and suction filtration, collecting products, and carrying out vacuum drying to obtain 1.4 Kg of products. Herein,the prepared compound 1 is simple in reaction and post-treatment and can also be directly used for preparing octadecanedioic acid mono-tert-butyl ester-PFP, and a solid generated in the reaction for preparing the octadecanedioic acid mono-tert-butyl ester-PFP is the product, and a high-purity product can be obtained only by simple pulping. The coupling difficulty of octadecanedioic acid or tert-butyl ester of octadecanedioic acid used for preparing side chains of polypeptides such as semaglutide and the like is relatively high, while the octadecanedioic acid mono-tert-butyl ester-PFP can react only by adding alkali, so that the reaction efficiency is high.

The invention discloses a preparation method of fluorine-containing vinyl ether. The method comprises the following steps of: uniformly mixing a perfluoro-linear chain or branched chain acyl fluoride compound, trifluoroethylene sulfuric ester and anhydrous hydrogen fluoride liquid in the mole ratio of 1:1:(1-20); passing from bottom to top through a vertical-tube type reactor which is filled with a catalyst; finishing addition reaction in a short time under the action of the high specific surface area catalyst inside the reactor; and setting apart a reaction liquid product from the upper part of the vertical-tube type reactor to form a product with a general formula in formula (I). In the invention, a functional fluorine-containing monomer can be prepared continuously and efficiently with no adoption of high temperature pyrolysis path, easily operated reaction equipment, conveniently controlled reaction temperature and no use of any organic solvent, and a high-purity monomer can be obtained through simple rectification. The reaction is carried out continuously inside the reactor and satisfies industrialization requirements. CF2=CF-O-Rf (I).

The invention discloses a synthetic method of 3, 5-difluorophenol, and belongs to the technical field of chemical synthesis. According to the method, 3,5-difluorophenolate is obtained through a one-pot reaction of 2,4,6-trifluorobenzoic acid in a solvent under the action of alkali, 3,5-difluorophenol is obtained after acid regulation and dissociation, and the method has the advantages of cheap and easily available raw materials, short synthesis steps, simple operation, mild reaction conditions, high synthesis yield, good product quality, suitability for industrial production and the like. According to the method, cheap and easily available pentachloronitrile is taken as a raw material, 2, 4, 6-trifluoro-3, 5-dichlorobenzonitrile is obtained through a fluorination reaction, 2, 4, 6-trifluoro-3, 5-dichlorobenzoic acid is obtained through a hydrolysis reaction, and finally, the raw material 2, 4, 6-trifluoro-3, 5-dichlorobenzoic acid is synthesized through a selective dechlorination reaction, so that simple, cheap and efficient preparation of the raw material 2, 4, 6-trifluorobenzoic acid is realized, and the industrial application value of the synthesis process is improved.

The invention relates to a method for continuously preparing pentafluorophenol by a microreactor, which belongs to the field of chemical production processes. The method comprises the following steps:simultaneously pumping hexafluorobenzene and an inorganic alkali aqueous solution into a micro-channel reactor by using a metering pump respectively, and mixing for a hydrolysis reaction; keeping thetemperature of the reactor at 130-170 DEG C, controlling and maintaining the pressure of a pipeline at 0.5-1.0 Mpa by an outlet quantitative pressure control valve, connecting an outlet with a heat exchanger, obtaining an aqueous solution of pentafluorophenolate from the outlet of the heat exchanger, adding hydrochloric acid steam, distilling to obtain an oil layer, and rectifying and dehydratingthe oil layer to obtain pentafluorophenol. The method is simple in process, low in cost, free of amplification effect and capable of achieving continuous production.

The present invention provides a metalporphyrin complex having structure represented by formula (I), wherein R₁, R₂, R₃, R₄, R₅, R₆, R₇, R₈, R₉ and R₁₀ are independently selected from one of hydrogen, halogen, aliphatic group, substituted heteroaliphatic group, aryl and substituted heteroaryl; n is 1-6; L is quaternary ammonium functional group or quaternary phosphonium functional group; M is a metal element; and X is one of halogen, —NO₃, BF₄—, —CN, p-methyl benzoate, o-nitrophenol oxygen anion, 2,4-dinitrophenol oxygen anion, 2,4,6-trinitrophenol oxygen anion, 3,5-dichlorophenol oxygen anion and pentafluorophenol oxygen anion. The metalporphyrin complex provided in the present invention has two quaternary ammonium functional groups or two quaternary phosphonium functional groups, and compared with the prior art, the metalporphyrin complex shows higher catalytic activity in catalyzing polymerization reaction of carbon dioxide and an epoxide.

The invention belongs to the technical field of chemistry, and discloses a compound Biotin-PEG3-SS-DBCO as well as a preparation method and application thereof.The preparation method comprises the following steps: slowly adding 2, 2 '-dithio bipyridine into 2-aminoethanethiol hydrochloride to react to obtain 2-(2-pyridyl disulfide) ethylamine hydrochloride; adding thiohydracrylic acid into the methanol solution of the compound 2 to obtain 3-[(2-aminoethyl) dithio] propionic acid hydrochloride; the preparation method comprises the following steps: slowly adding pentafluorophenol into a dichloromethane solution of dibenzocyclooctyne-carboxyl (compound 4) and EDCI, and then adding a compound 3 and triethylamine to prepare dibenzocyclooctyne-disulfide bond-carboxyl (compound 5); the preparation method comprises the following steps: slowly adding pentafluorophenol into a dichloromethane solution of a compound 5 and EDCI, then adding biotin tripolyethylene glycol amino (a compound 7) and triethylamine to react, and purifying to obtain the compound Biotin-PEG3-SS-DBCO. The preparation method is simple and low in cost.

The invention relates to the field of screws, and particularly discloses a screw and a machining process thereof. The surface of the screw is finished by a wear-resistant coating, and the wear-resistant coating comprises the following raw materials in parts by weight: 40-50 parts of polyethersulfone resin; 20-25 parts of 2,3,4,5-tetrafluorobenzamide; 15-20 parts of 4-chloro-2,6-difluorophenol; 8-10 parts of ceramic micro powder; 4-7 parts of butyronitrile; and 1-2 parts of a curing agent. The processing technology comprises the following steps: S1, preparing the wear-resistant coating; S2, spraying the wear-resistant coating; and S3, conducting gloss oil spraying. The polyether sulfone resin, 2,3,4,5-tetrafluorobenzamide and 4-chloro-2,6-difluorophenol are added, and the product obtained through the reaction of 2,3,4,5-tetrafluorobenzamide and 4-chloro-2,6-difluorophenol is coupled with the polyether sulfone resin, so that the tightness between structures is improved, and the wear resistance of the wear-resistant coating is improved; and besides, according to the machining process, gloss oil is sprayed to protect the screw, the friction coefficient of the surface of the screw is reduced, and therefore the wear-resisting effect of the surface of the screw is improved.