128 results about "Thiocarboxylic acid" patented technology

A method for preparing a functionalized polymer, the method comprising the steps of (i) polymerizing monomer with a coordination catalyst to form a reactive polymer; and (ii) reacting the reactive polymer with a carboxylic or thiocarboxylic ester containing a silylated amino group.

The invention provides a method for polishing one or more layers of a multi-layer substrate that includes a first metal layer and a second layer comprising (i) contacting the first metal layer with a polishing system comprising a liquid carrier, at least one oxidizing agent, at least one polishing additive that increases the rate at which the system polishes at least one layer of the substrate, wherein the polishing additive is selected from the group consisting of pyrophosphates, condensed phosphates, phosphonic acids and salts thereof, amines, amino alcohols, amides, imines, imino acids, nitriles, nitros, thiols thioesters, thioethers, carbothiolic acids, carbothionic acids, thiocarboxylic acids, thiosalicylic acids, and mixtures thereof, and a polishing pad and / or an abrasive, and (ii) polishing the first metal layer with the system until at least a portion of the first metal layer is removed from the substrate.

An aqueous process is described in which thiocarboxylate silane is produced from haloalkyl silane by reaction of the haloalkyl silane with an aqueous solution of thiocarboxylate salt in the presence of a catalytically effective amount of alkylguanidinium salt.

The invention provides a plastic composition and a plastic surface metallizing method. The plastic composition contains plastic matrix resin and metal chelate; the metal chelate is a complex of metal ions and organic chelating agent; and the organic chelating agent is at least one of diketone, aminocarboxylic acid, thiocarboxylic acid, polycarboxylic acid and nitrogen-containing heterocyclic compound with a general formula CnH8N2, wherein n is 10, 12 or 14. The plastic surface metallizing method comprises the following steps of: performing injection molding on the plastic composition provided by the invention to form a plastic piece, then performing laser etching on the plastic piece by adopting laser with wavelength of 1,064 nanometers to 1,000 microns, and chemically plating a laser etching area to form a metal plating layer. The organic chelating agent adopted in the plastic composition has low cost and is sensitive to the laser, so the plastic surface has high activation degree; and when the plastic surface is metallized, the infrared laser with lower cost is adopted so that the metal ions of the metal chelate in the plastic piece are decomposed as an active center of subsequent chemical plating and the precision is very high.

The invention provides a preparation method of polymer-coated perovskite quantum dots. The preparation method comprises the following steps: supplying perovskite quantum dots, and dispersing the perovskite quantum dots in a solvent to form a perovskite quantum dot solution, wherein ligands on the surfaces of the perovskite quantum dots comprise thiocarboxylic acid ligands; adding a polymer monomerand a photoinitiator into the perovskite quantum dot solution for reacting under an ultraviolet radiation condition in which the water vapor content is less than 30 percent to generate the polymer-coated perovskite quantum dots, wherein the polymer monomer is an unsaturated polymer monomer containing amidogen.

A fiber capable of forming a metal chelate and a process for producing the same are disclosed, wherein the fiber is characterized in that at least one metal chelate-forming compound selected from the group consisting of aminocarboxylic acid. aminocarboxylic acid, thiocarboxylic acid and phosphoric acid. which are reactive with a glycidyl group, is bonded to a molecule of a synthetic fiber through a crosslinkable compound having a reactive double bond and a glycidyl group in its molecule. The chelate-forming fiber is excellent in capturing harmful heavy metal ions and can be easily produced in a simple and safe way at a low cost.

The invention provides a system for polishing one or more layers of a multi-layer substrate that includes a first metal layer and a second layer comprising (i) a liquid carrier, (ii) at least one oxidizing agent, (iii) at least one polishing additive that increases the rate at which the system polishes at least one layer of the substrate, wherein the polishing additive is selected from the group consisting of pyrophosphates, condensed phosphates, phosphonic acids and salts thereof, amines, amino alcohols, amides, imines, imino acids, nitriles, nitros, thiols, thioesters, thioethers, carbothiolic acids, carbothionic acids, thiocarboxylic acids, thiosalicylic acids, hydroxylates, carbonylates, carboxylates, and acids thereof, and mixtures thereof, (iv) at least one stopping compound, and (v) a polishing pad and / or an abrasive. The invention also provides a method of polishing a substrate comprising contacting a surface of a substrate with the system and polishing at least a portion of the substrate therewith. Moreover, the invention provides a method for polishing one or more layers of a multi-layer substrate that includes a first metal layer and a second layer comprising (a) contacting the first metal layer with the system, and (b) polishing the first metal layer with the system until at least a portion of the first metal layer is removed from the substrate.

The invention discloses a latent polythiol curing agent, and a synthetic method and an application of the latent polythiol curing agent. The molecule of the latent polythiol curing agent comprises more than one beta-hydroxyl carbothioate structural unit shown in the description. In the structural unit, R1 is at least selected from (CH2)nCH3, C(CH3)3, and phenyl, wherein n is any integer selected from 0-6. The synthetic method comprises: taking an epoxy-group-containing compound and carbothioic acid, the mole ratio of which is from 1:1.01 to 1:1.5, performing a reaction at -10 DEG C to 30 DEG C for 1-24 h, and removing excessive carbothioic acid to obtain the latent polythiol curing agent. The latent polythiol curing agent can react with an epoxy resin to form a polymer. The latent polythiol curing agent can be stably stored for a long time and is free of sulfur stink. The synthetic method is simple, fast, and efficient, and is low in cost. The latent polythiol curing agent has bright application prospects in the fields, such as thermosetting plastics, coatings, and elastomer.

The present invention provides a quantum dot having a ligand layer on a surface thereof, the ligand layer comprises a malonic acid derivative, a thiothiol compound, a thiocarboxylic acid compound, andmore than one of an ester group and sulfur alcohol group-based compounds. The quantum dot is excellent in oxidation stability, and can be effectively applied to various applications such as a quantumdot film, a color filter, and a quantum dot light-emitting diode.

A method can be used for the production of a coated substrate. The coating contains copper. A copper precursor and a substrate are provided. The copper precursor is a copper(I) complex which contains no fluorine. A copper-containing layer is deposited by means of atomic layer deposition (ALD) at least on partial regions of the substrate surface by using the precursor. Optionally, a reduction step is performed in which a reducing agent acts on the substrate obtained in the layer deposition step. In various embodiments, the precursor is a complex of the formula L2Cu(X∩X) in which L are identical or different σ-donor-π acceptor ligands and / or identical or different σ,π-donor-π acceptor ligands and X∩X is a bidentate ligand which is selected from the group consisting of β-diketonates, β-ketoiminates, β-diiminates, amidinates, carboxylates and thiocarboxylates.

The invention discloses an acridinium ester derivative, a synthesis method and application thereof. The chemiluminescent acridinium ester derivative provided by the invention has a structural formula shown as formula I. The invention further discloses a synthesis method for the compound shown as formula I, and the method includes: (1) synthesizing acridine-9-thiocarboxylic acid p-trifluoromethylbenzene ester; (2) synthesizing 10-methyl-acridine-9-thiocarboxylic acid p-trifluoromethylbenzene ester; (3) synthesizing 10-methyl-9, 10-dihydroacridine-9-thiocarboxylic acid p-trifluoromethylbenzene ester; and (4) synthesizing TfS-APS. The acridinium ester derivative provided by the invention can be used as an immunoassay tracer to a chemiluminescence immunoassay reagent system with alkaline phosphatase (ALP) as the marker enzyme. The application effect in a kit proves that the acridinium ester derivative involved in the invention can detect 1*10<-19>mol ALP molecules, and has the advantages of high sensitivity, long luminescence duration, simple use, constant intensity under room temperature condition, and no need for precise temperature control, etc.

The invention belongs to the field of organic synthesis, and provides a synthesis method of an RAFT chain transfer agent containing terminal hydroxyl; the synthesis method has the advantages of mild conditions, no need of catalysts and high reaction speed, and is applied to the preparation of segmented copolymers by combining the RAFT polymerization with the hydroxyl-triggered ring opening polymerization. Pyrrole reacts with sodium hydride and carbon disulfide, or a grignard reagent reacts with the carbon disulfide to generate disulfo-carboxylate; the disulfo-carboxylate is reacted with 4-bromine methyl benzyl alcohol for 1 hour at room temperature with dimethyl sulfoxide as a solvent; the generated crude product is implemented with such experimental methods as extraction and column chromatography to finally obtain the RAFT chain transfer agent containing the terminal hydroxyl (see attached drawing). The RAFT chain transfer agent synthesized by the method, provided by the invention, overcomes the defect that only the RAFT polymerization can be implemented in the existing preparation of the RAFT chain transfer agent. The RAFT chain transfer agent containing a trigger radical at the terminal can synchronously realize the combination of the RAFT and the ring opening polymerization (ROP) to prepare the segmented copolymers with certain structures and functions, and has a broad application prospect in a plurality of fields of drug release, bioengineering materials, material separation and immunoassay.

The invention discloses a high-activity antimony / titanium composite catalyst, which contains the following components: 1 antimony catalysts, 2 titanium catalysts, 3 first catalyst promoters and 4 second catalyst promoters, wherein the antimony catalysts are oxides and salts of antimony, the titanium catalysts are titanates, the first catalyst promoters are phosphoric acids, phosphorous acids and alkyl groups and / or polyaryl ethers of the phosphorous acids, and the second catalyst promoters are benzothiodiazoles. The antimony / titanium composite catalyst can be used in a method for preparing polyethylene glycol terephthalate (PET) copolyesters, which includes the following steps: 1 mixing and adding the antimony / titanium catalyst, the first catalyst promoters, the second catalyst promoters and binary acids into a reaction system, 2 leading the terephthalic acids, esters of the terephthalic acids and excess ethylene glycol to together perform an esterification reaction at temperature of 240-260 DEG C, at pressure of 0.2-0.4MPa and with reaction time of 1-2 hours, and 3 adding copolymerization glycol monomers for a polycondensation reaction to obtain the copolyesters. The antimony / titanium composite catalyst and the application thereof in the method for preparing the PET copolyesters have the advantages that the catalyst can activate the antimony series catalyst and shortens polycondensation time, and the problem of decreasing of polyester heat stability due to the fact that the antimony series catalyst is apt to yellow products is solved.

A fiber capable of forming a metal chelate and a process for producing the same are disclosed, wherein the fiber is characterized in that at least one metal chelate-forming compound selected from the group consisting of aminodicarboxylic acids, aminocarboxylic acids, thiocarboxylic acids and phosphoric acid, which are reactive with a glycidyl group, is bonded to a molecule of a natural fiber or regenerated fiber through a crosslinkable compound having a reactive double bond and a glycidyl group in its molecule. There are also disclosed a method of capturing metal ions using the fiber and a metal chelate fiber which can effectively make use of the characteristics of the metals and can be easily discarded or incinerated.

The invention provides a novel preparation method for taurine, substituted taurine and N-acylated derivates. The method comprises taking aziridine and substituted aziridine as raw material, obtaining N-acylated taurine derivates by opening loop and oxygenizing, hydrolyzing N-acylated taurine derivates to obtain taurine or substituted taurine. The raw material of the preparation method is simple and easy to get and prepare, especially convenient to separate and purify, and can be used for the preparation of optical activity substituted taurine and N-acyl group substituted taurine. The obtained compounds can be used as nutrient substance, medicament, enzyme inhibitors, antibacterial agents, surface active agents, plant growth regulators and raw materials for preparing sulfonopeptides.

The present invention relates to new technological process of converting carboxylic acid into thiocarboxylic acid, and is especially synthesis process of fluticasone acetate. The present invention prepares fluticasone acetate with medicinal level flumethasone as initial material and through one of six technological paths, and has the advantages of short reaction path, high yield, simple reaction condition, high product purity, low cost, etc.

The invention relates to a preparation method for preparing water-soluble nanoparticles by adopting a ligand exchange method. The method comprises the following specific steps of: introducing two water-soluble polyethylene glycol chains onto iminodiacetic acid; reacting the compound with carbon bisulfide to generate a carbon bisulfide derivative which has a thiocarboxylic acid structure and serves as a ligand; and performing ligand exchange on the obtained ligand and oil-soluble nanoparticles to obtain stable water-soluble nanoparticles. The water-soluble nanoparticles prepared by the method can be suitable for a plurality of fields of biology, photoelectric materials, catalysis and the like.

Provided is a technology for preparing a terminated-type sulfur-containing silane coupling agent through a hydrosilation method. First, acyl chloride and sodium sulfide or sodium bisulfide are reacted in a water phase to prepare an aqueous solution of sodium thiocarboxylate; under catalysis of phase-transfer catalysts, the aqueous solution of sodium thiocarboxylate is reacted with chloropropene, and thiocarboxylate allyl ester, liquid separation is carried out, after low-boiling-point substance removal, thiocarboxylate allyl ester and trialkoxysilane are subjected to a hydrosilation reaction under action of platinum catalysts, and after the reaction is over, a finished product silane coupling agent is obtained after low-boiling-point substance removal and decolouring steps. The raw material utilization rate is raised, The hydrosilation reaction process keeps anhydrous state, hydrolysis of alkoxy silane is inhibited, and the storage stability of the silane coupling agent is raised.

The invention relates to a novel cathode material for lithium secondary batteries and the lithium secondary batteries with the cathode material. The cathode material provided by the invention is a thiocarbonyl compound, at least contains a carbon-sulfur double bond, and is at least one component selected from the group consisting of thiocarboxylic acid, thioamide, thioxo aldehyde, thioxo ketone, thioxo isocyanate, thioxo acid anhydride and thioacyl peroxide, and is prepared by the reaction of metal sulfide, carbonyl-containing carboxylic acid or amide, aldehyde, ketone, isocyanate, acid anhydride and acyl peroxide. When the cathode material is applied in lithium secondary batteries, the first-time discharge capacity of the lithium secondary batteries is greater than 600mAh / g, and the discharge capacity is greater than 150mAh / g after discharging 100 times for 10 C.

The present invention relates to a method for determining the concentration of iron ions in a hydrocarbon composition, as well as reagents and kits for use in such methods. The method utilises a thiocarboxylic acid having formula (I) which reduces the ferric ions and complexes ferrous ions producing a colored solution, which can be analysed to determine the amount of iron ions in the starting sample.

The invention relates to the field of environmental protection, and specifically relates to preparation of a carbodithioic acid-modified heavy metal adsorbing material, and application of the material for removing Cu<2+> in wastewater. The technological process comprises the following steps: (1) pretreatment of chlorine balls; (2) preparation of amino microspheres; (3) modification of amino resin by carbodithioic acid; (4) Cu<2+> adsorption property. The carbodithioic acid-modified chelating resin provided by the invention integrates physical adsorption and chemical adsorption, the preparation steps are simple, and the grafting percent of the amino resin is up to 70%. The resin uses insoluble and infusible crosslinked polystyrene as a matrix, and is good in acid and alkali resistance. The adsorption effect of the resin is higher than that of other types of resin, the 3.17*10<-4> moL.L<-1> Cu<2+> adsorption rate is 96%, the wastewater discharge can reach the primary standard (less than 0.5ppm) in China, and the resin is suitable for recycling a large number of Cu<2+> in wastewater in industrial cities and Cu<2+> salt production enterprises, and has good application prospects.

The invention relates to a preparation method of fluticasone furoate, especially preparation and purification of an intermediate 6alpha, 9alpha-difluoro-17alpha-[(2-furylcarbonyl)oxy]-11beta-hydroxy-16alpha-methyl-3-oxo-androstane-1,4-diene-17beta-thiocarboxylic acid. The preparation method comprises the following steps: in the presence of alkali and alcoholic solvent, a compound as shown in the formula VIII is converted into a mixture containing the compound of formula II; the mixture containing the compound of formula II is mixed with an aqueous solution of inorganic base and an ester solvent; a water phase is separated; pH value of the water phase is regulated by the use of acid until a solid is precipitated out; and the solid is separated. The invention provides a preparation method capable of remarkably raising purity of fluticasone furoate. Safety of drug application is guaranteed.

The invention discloses an acetylene amide mediated method for selectively synthesizing carbonyl thioesters and ordinary thioesters. The ordinary thioesters are further used for preparing amides and peptides, and the carbonyl thioesters are used for preparing thioamides and thiopeptides. An addition reaction is carried out between acetylene amide in m-xylene and thiocarboxylic acid to selectivelyobtain the carbonyl thioester and ordinary thioester of which the ratio is 3:1 under the condition of 40 DEG C below zero; the ordinary thioesters can carry out a combination reaction with amines to produce amides and peptides; and the carbonyl can carry out a combination reaction with the amines to produce thioamides and thiopeptides. The method disclosed by the invention is mild in reaction conditions, free of any metal catalyst, high in reaction speed, high in yield, simple in operation and wide in application range. With respect to chiral thiocarboxylic acid in a position alpha of carboxyl, when thioamide bonds or thiopeptide bonds are formed from the carbonyl thioesters or when amido bonds or peptide bonds are formed from the ordinary thioesters, any racemization phenomenon can be avoided.

The invention relates to a novel iridium complex with a nitrogen heterocyclic ring as a main ligand and a thiocarboxylic acid compound as an auxiliary ligand. The nitrogen heterocyclic ring and a carbon-sulfur group in an iridium complex molecule help to improve the electron mobility of the material and control a luminescence color, so the injection and transmission of holes and electrons are balanced, the current carrier recombination region is broadened, the device efficiency is improved and the efficiency roll-off is reduced. The iridium complex has the advantages of simple synthesis, stable chemical property, easy sublimation and purification, and excellent device performance, and provides convenience for the acquisition of high-efficiency organic electroluminescent devices and application in the technical fields of lighting and display.

The invention discloses a preparation method for synthesis of phenolic ester through a thiocarboxylic acid mediated visible light catalyzed phenol acylation reaction. Thiocarboxylic acid compounds andphenol compounds are subjected to a site specific reaction under certain conditions to produce phenolic ester compounds, wherein the certain conditions are as follows: under the conditions of normaltemperature, normal pressure and visible light, K2CO3 is used as an alkaline catalyst, terpyridyl ruthenium dichloride hexahydrate is used as a photosensitizer and acetonitrile is used as a reaction solvent. Synthesis of phenolic ester under catalysis of visible light is realized, thiocarboxylic acid is used as an acylation reagent, and the site specific phenol esterification reaction is realizedefficiently under mild conditions of normal temperature, normal pressure and visible light. The method has mild reaction conditions, large substrate functional group tolerance, high applicability andhigh yield, and an efficient, reliable and economical preparation method is provided for synthesis of phenolic ester.

The invention provides a salt-free preparation method for substituted taurine, and belongs to the technical field of organic synthesis. Nitroolefin and thionocarboxylic acid serving as raw materials are subjected to addition, oxidation and reduction to form the substituted taurine; and particularly, the method can be used for preparing cis and trans disubstituted and trisubstituted taurine. The preparation method has the advantages of simple and readily available raw materials, convenient operation and no troublesome desalting purification process, and suitability for large-scale industrial production. The compounds prepared by the method can be used as nutrient substances, medicaments, enzyme inhibitors, antibacterial agents, surfactants, plant growth regulators, raw materials for preparing sulfonamido peptide and the like.

The invention discloses an electrochemical oxidation synthesis method for amide and application thereof, and belongs to the technical field of electrochemical organic synthesis. According to the synthesis method for the amide, thiocarboxylic acid or thiocarboxylate and amine are adopted as reaction raw materials, firstly, the thiocarboxylic acid or the thiocarboxylate is oxidized through an anodein an electrolytic tank so as to form free radical intermediates, then the two free radical intermediates are coupled so as to form a key intermediate disulfide compound, and then nucleophilic addition-elimination reaction is carried out on the disulfide compound and the reactant amine so as to generate an amide compound. The synthesis method has the advantages that no catalyst needs to be added,in addition, the reaction conditions are mild, by-products are few, synthesis and purification of the amide compound are facilitated, and the method has wide application in preparation of amide drugsin drug synthesis.

This invention relates to a new method for the stereospecific thiocarboxylation of organic compounds for the preparation of compounds according to formula (I):wherein a compound of formula (II):is reacted with a compound of formula (IIIa) or (IIIb):then treating the obtained product with a thiocarboxylic acid or a salt thereof, and subsequently carrying out a nitration reaction.

The invention discloses a sulfhydryl compound containing beta-ester groups and an acetyl-transferred synthesis method thereof. The method comprises the following steps of: under the protection of nitrogen gas, adding a compound or epoxy resin containing 1mol of epoxy groups, 5-100mol of solvent, 0.5-2mol of organic amine and 1.01-1.5mol of monothiocarboxylic acid into a reactor in sequence and reacting for 1-24h at -10 DEG C to 30 DEG C; washing by dilute hydrochloric acid; evaporating to remove the solvent; and, removing the excessive monothiocarboxylic acid by the vacuum evaporation or the column chromatography to obtain the sulfhydryl compound containing the beta-ester groups. The method provided by the invention has the advantages of rapidness, high efficiency and simple and convenient process. A lot of epoxy resins can be converted into the sulfydryl resin. The application prospects of the sulfhydryl compound in the functional macromolecular materials, the thermosetting high-performance materials and the additives and the like are wide.