102 results about "Pinacol" patented technology

The invention discloses a quick-curing polyurethane seamless expansion joint material for roads and a preparation method, and belongs to the technical field of road engineering materials. The material is prepared from polyether polyol, polycaprolactone glycol, a bisphenol A epoxy-polyether block isocyanate terminated prepolymer, a methyl phenyl silicon-boron hybrid hydroxyl chain extender, diphenylmethane diisocyanate, calcium carbonate, wollastonite, a hindered amine anti-aging agent and dioctyl phthalate. Wherein the bisphenol A epoxy-polyether block isocyanate terminated prepolymer is prepared by the following steps: reacting bisphenol A with epoxy chloropropane to generate epoxy resin, reacting with polytetramethylene ether glycol, and introducing isophorone diisocyanate; the methyl phenyl silicon-boron hybrid hydroxyl chain extender is prepared by carrying out hydrosilylation and ethylene glycol reaction on methyl trimethoxy silane, 3-glycidyl ether oxypropyl trimethoxy silane and allylboronic acid pinacol ester; and the methyl phenyl silicon-boron hybrid hydroxyl chain extender is prepared by carrying out hydrosilylation on methyl trimethoxy silane, 3-glycidyl ether oxypropyl trimethoxy silane and allylboronic acid pinacol ester. The material has the advantages of quick curing property, weather resistance and high-temperature stability, and is suitable for road seamless expansion joint scenes.

The invention relates to the field of sealing materials, in particular to a heat-resistant and oil-resistant sealing gasket for an engine and a preparation method of the heat-resistant and oil-resistant sealing gasket. The liquid silicone rubber is prepared from the following raw materials in percentage by weight: 60-80% of a liquid silicone rubber base material, 15-28% of an oil-resistant heat-resistant base material, 0.1-3% of a cross-linking agent, 0.1-0.6% of a catalyst and the balance of a processing aid, the oil-resistant and heat-resistant base material is prepared from an inorganic filler, aramid pulp, polyhedral oligomeric silsesquioxane-alcoholic hydroxyl group, an activation dispersant and a double-active-group-epoxy silane coupling agent; the activation dispersant is a trihydroxymethyl caprolactone cross-linked polymer and / or bis (pinacol) borate; and the inorganic filler is composed of a plurality of components selected from fumed silica powder, nano-scale ceramic powder and zinc borate nano-powder. The oil-resistant and heat-resistant base material obtained by the scheme interacts with the silicone rubber base material, so that the prepared heat-resistant and oil-resistant sealing gasket for the engine has better comprehensive performance.

The invention provides an electrolyte and a lithium iron manganese phosphate battery, and relates to the technical field of lithium batteries. The electrolyte comprises a lithium salt, an organic solvent and an additive, the additive is a phenylboronic acid pinacol ester compound, and the phenylboronic acid pinacol ester compound has a structure as shown in a formula I. The electrolyte provided by the invention is helpful for improving the cycling stability of the lithium manganese iron phosphate battery under a high-temperature condition.

The present application relates to a kind of catalyst composition and its application in catalytic preparation optically active secondary alcohol, the catalyst composition includes chiral ionic bridged aryloxyalkane rare earth complex and additive, the additive is selected from one or more of pyrimidine, N,N-dicyclohexylmethylamine, 4,4'-dipyridyl.The above-mentioned catalyst composition can be used for synergistically catalyzing asymmetric borohydration of chalcone and its derivatives with pinacol borane, and show high catalytic activity and high enantioselectivity, product yield is as high as 99%, ee value can reach 84%, provide a reliable new way for the efficient, high selective synthesis of optically active secondary alcohol.

The application discloses a high-temperature-resistant power cable and a preparation method thereof. A copper conductor is twisted to form a core, and an insulating layer, a shielding layer and a protective layer are sequentially coated on the surface of the core to obtain the high-temperature-resistant power cable. The protective layer is a reinforced resin, and the reinforced resin comprises the following raw materials in parts by weight: 100-120 parts of functionalized polyethylene, 20-30 parts of modified filler, 0.5-0.8 parts of p-toluenesulfonic acid and 10-15 parts of 1,4-p-biphenyl boronic acid bis(pinacol) ester. The functionalized polyethylene and the modified filler form an organic-inorganic interpenetrating network under the action of the 1,4-p-biphenyl boronic acid bis(pinacol) ester. The modified filler can form a thermal barrier network in the whole matrix, effectively hinders the thermal motion of the polyethylene molecular chain, and the side chain of the functionalized polyethylene molecular chain contains a phenyl polysiloxane structure, which can increase the flexibility of the polyethylene chain segment. In combination with the formation of dynamic crosslinking, the high-temperature-resistant effect of the material is greatly improved.

This invention relates to the field of electrochromic thin film technology, and more particularly to a dithiophene derivative, its preparation method, and its application, as well as an electrochromic thin film and its preparation method. This invention involves reacting dithiophene with tributyltin chloride to generate tin-modified dithiophene, reacting dithiophene with isopropanol pinacol boronic acid ester to generate boron-modified dithiophene, and then reacting the tin-modified or boron-modified dithiophene with 1,4-diiodo-2,5-bis-(6-hexynyl)-benzene to generate 1,4-dithiophene-2,5-bis-(6-hexynyl)-benzene. This product is then reacted with dimethylboron hydride generated from lithium aluminum hydride and dimethoxyethane to finally obtain the dithiophene derivative. This derivative can be applied in electrochromic thin films. This invention successfully prepares an electrochromic thin film with fast response and fluoride ion detection capability by electrochemically polymerizing the dithiophene derivative.

The invention discloses a surface-enhanced Raman probe as well as a preparation method and application thereof, and belongs to the technical field of biomedical imaging and stem cell therapy. The preparation method comprises the following steps: coating an ultrathin silver shell layer on the surface of gold nanoparticles to obtain Au-coated Ag particles; 4-sulfydryl phenylboronic acid pinacol ester molecules are modified on the surface of Au (at) Ag to form a Raman report layer, then sulfydryl-polyethylene glycol is introduced to realize biological orthogonal coupling, and the modified SERS probe is obtained through bovine serum albumin modification; jointly incubating the modified SERS probe and the azidation-labeled mouse bone marrow mesenchymal stem cells, so as to form an mmol / LSC-SERS composite probe; the obtained probe has good biocompatibility, stability and anti-interference capability and is suitable for a complex physiological environment, and the preparation method is simple and good in repeatability, is completely carried out in a water phase and does not need an organic solvent.

The invention belongs to the technical field of medicine synthesis, and particularly relates to a method for efficiently preparing cyclobutane derivatives. Comprising the following steps: dissolving 4-chloro-7H-pyrrolo [2, 3-d] pyrimidine and chloromethyl pivalate in 1, 4-dioxane, and adding an acid binding agent for reaction to obtain a reaction solution; the preparation method comprises the following steps: adding 1-(1-ethoxyethyl)-4-pyrazol boronic acid pinacol ester, purified water, a catalyst and an acid-binding agent into a reaction kettle, carrying out Suzuki reaction, separating liquid, adding activated carbon into an upper organic phase for decoloration, adding an organic solution containing hydrogen chloride for crystallization, and filtering to obtain a wet product; and dissolving the wet product and 2-[1-(ethylsulfonyl)-3-azacyclobutane] acetonitrile in 1, 4-dioxane, and reacting under an alkaline condition to obtain the cyclobutane derivative. According to the preparation method, synthesis is performed through a one-pot four-step reaction, a solvent only relates to 1, 4-dioxane and water, and post-treatment is simple, convenient and efficient.

The application discloses a preparation method of baricitinib, and belongs to the technical field of drug synthesis. The method comprises the following steps: firstly, 2-[1-(ethylsulfonyl)-3-azetidinyl]acetonitrile and 4-pyrazole boron pinacol ester are subjected to a Michael addition reaction to obtain 1-(ethylsulfonyl)-3-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazol-1-yl]-3-azetidine acetonitrile as an intermediate I; secondly, a protection group is introduced on the amino group of 4-chloropyrrolopyrimidine to obtain an intermediate II; finally, the intermediate I and the intermediate II are subjected to a Suzuki coupling process by adopting a method of combining a nickel pre-catalyst with a supporting ligand to obtain the baricitinib. The preparation method creatively realizes cross coupling of the baricitinib by adopting the cheap metal nickel as a catalyst, avoids the use of a heavy metal palladium catalyst, and has the advantages of low cost, low toxicity, small pollution, green environmental protection and the like.

The invention discloses (E)-1, 4-diether olefin and a preparation method thereof, and the (E)-1, 4-diether olefin is obtained by using 1, 3-diene as a raw material and carrying out electrochemical reaction in the presence of an electrolyte and a solvent, wherein the 1, 2, 4-trimethyl-1, 3- The structural formula of the 1, 3-diene is as follows: R1 is phenyl, p-fluorophenyl, p-chlorphenyl, p-bromophenyl, p-methylphenyl, p-methoxyphenyl, p-trifluoromethylphenyl, p-trifluoromethoxyphenyl, p-acetoxyphenyl, p-methyl formate phenyl, p-cyanophenyl, p-pinacol borate phenyl, p-phenylphenyl, o-oxybenzyl phenyl and o-methoxyphenyl; r1 is one of 1, 2-naphthyl; the solvent is a mixed solvent containing methanol. The preparation method of (E)-1, 4-diether olefin has high E-selectivity and 1, 4-selectivity, and an electro-catalysis mode is adopted, so that the use of a stoichiometric toxic, expensive or dangerous oxidant is avoided.

The application belongs to the technical field of asymmetric catalytic synthesis, and particularly relates to an alpha-carbon chiral phosphine compound and a preparation method thereof. In a protective gas atmosphere, an asymmetric boron protonation reaction is carried out on a dienyl phosphine oxide compound shown in a structure of formula II, pinacol borate, a copper (I) catalyst, a chiral ligand, an organic alkaline compound and a proton additive in a polar organic solvent to obtain an alpha-carbon chiral phosphine compound shown in a structure of formula I; the chiral ligand is a cyclic phosphine ligand (S, S)-Ph-BPE or a cyclic phosphine ligand (R, R)-Ph-BPE. The preparation method provided by the application can synthesize the alpha-carbon chiral phosphine compound shown in the structure of formula I with high yield and excellent enantioselectivity, the synthesis method is simple and low in cost, and the alpha-carbon chiral phosphine compound can be further converted into a new optically active product.

The invention discloses a synthesis method of a silicon-substituted benzo-bicyclo [3.1. 1] heptane compound, which comprises the following steps: under the action of a copper catalyst, alkali and a silicon reagent, putting o-alkynyl phenyl cyclobutanone in a solvent for reaction, and carrying out post-treatment to obtain the silicon-substituted benzo-bicyclo [3.1. 1] heptane compound, the silicon source is (dimethylphenylsilyl) boronic acid pinacol ester. The silicon-substituted benzo-bicyclo [3.1. 1] heptane compound is prepared by combining a cheap metal copper catalyst with a silicon reagent. The reaction system is good in selectivity and mild in condition, the highest yield can reach 68%, and the method has wide application prospects.

The invention belongs to the technical field of chemical analysis and detection, and provides a bimodal fluorescent probe and a preparation method and application thereof in hypochlorous acid detection, the chemical formula of the bimodal fluorescent probe is C68H44N2, and the preparation method comprises the following steps: weighing 2, 7-dibromo-9-fluorenone, 1-(4-phenylboronic acid pinacol ester)-1, 2, 4-triazole-1-one, 2, 4-triazole-1-one, 2, 4-triazole-1-one, 2, 4-triazole-1-one, 2, 4-triazole-1-one, 2, 4-triazole-1 The preparation method comprises the following steps: putting 1, 1, 2-triphenylethylene, a tetra (triphenylphosphine) palladium catalyst and potassium carbonate into a three-neck flask; sequentially injecting methylbenzene, absolute ethyl alcohol and water; carrying out heating reflux reaction, cooling to room temperature, carrying out extraction separation by using dichloromethane, collecting an organic phase, drying, carrying out rotary evaporation concentration to obtain a crude product, and purifying to obtain TPEO; dissolving TPEO and malononitrile in anhydrous dimethyl sulfoxide under the protection of argon, heating and stirring to react, cooling to room temperature, carrying out suction filtration, and washing the precipitate; the bimodal fluorescent probe can be applied to detection of hypochlorous acid, and has the advantages of specific selectivity, high sensitivity, wide detection concentration, high accuracy and the like.

The invention discloses a method for preparing benzyl borate compounds through chromium catalysis, and belongs to the technical field of organic synthesis. According to the method, aryl carboxylic ester is taken as a raw material, pinacolborane is taken as a boron source and a hydrogen source, metal chromium salt is taken as a catalyst, a specific ligand and elemental magnesium are added, and reaction is performed in a tetrahydrofuran solvent, so that the deoxidation boronization reaction of the aryl carboxylic ester is realized. Benzyl monoborate or benzyl subunit diborate can be selectively prepared through ligand regulation and control. The method has the advantages of mild reaction conditions, cheap catalyst, wide raw material source, simple operation and good chemical selectivity.

The application relates to a one-dose two-purpose borate ester bonding agent, a synthesis method and application thereof. The new borate ester bonding agent is synthesized from boric acid, n-butanol, pinacol and bis(2-hydroxyethyl)amino(trihydroxymethyl) according to a certain proportion through a three-step reaction. The new borate ester bonding agent synthesized by the application can significantly improve the interfacial bonding performance of nitramine explosives (HMX, RDX, CL-20) and a solid propellant binder matrix. Since the structure contains a polyhydroxy structure, the new borate ester bonding agent can also enter a crosslinking network to play a crosslinking agent role, thereby greatly improving the mechanical properties of the solid propellant. The new borate ester bonding agent is suitable for GAP propellant formulations and also suitable for hydroxyl-terminated propellant formulations. The application provides a new borate ester bonding agent design idea. The bonding agent synthesis method is simple and stable, the synthesis raw materials are widely sourced, the quality is easy to enlarge and control, and the mechanical properties of the polyether propellant can be significantly improved.

The invention belongs to the technical field of energetic materials, and discloses a synthesis method of a fusion casting carrier explosive 4-methoxy-1-methyl-3, 5-dinitropyrazol, commercially available 1-methylpyrazole-4-boronic acid pinacol ester is used as a raw material, a key intermediate 4-methoxy-1-methyl-1H-pyrazole is synthesized through a one-pot method two-step substitution reaction, and the fusion casting carrier explosive 4-methoxy-1-methyl-3, 5-dinitropyrazol is obtained. The product does not need to be purified, and can be directly nitrified after simple post-treatment, so that the casting carrier explosive product 4-methoxy-1-methyl-3, 5-dinitropyrazole is obtained. Compared with the prior art, the preparation method provided by the invention has the advantages of simplicity, high efficiency, low cost and the like, and has the potential of large-scale synthesis.

The application discloses a synthesis method of flurbiprofen and an intermediate thereof. The intermediate of the flurbiprofen is 3-fluoro-4-biphenyl boronic pinacol ester, and the synthesis method comprises the following steps: step A: 2-fluoro-4-bromobiphenyl is subjected to a coupling reaction with bispinacolyl diboron under the action of an alkali and a metal catalyst to obtain 3-fluoro-4-biphenyl boronic pinacol ester. The synthesis method of the flurbiprofen comprises the following steps: step C: 3-fluoro-4-biphenyl boronic pinacol ester is subjected to a coupling reaction with sodium 2-bromopropionate under the action of an alkali and a metal catalyst, and then the obtained reaction product is acidified to obtain flurbiprofen. According to the application, 2-fluoro-4-bromobiphenyl is prepared into 3-fluoro-4-biphenyl boronic pinacol ester, and then the 3-fluoro-4-biphenyl boronic pinacol ester is subjected to a Suzuki coupling reaction with sodium 2-bromopropionate to prepare flurbiprofen, the method has less side reactions, and the molar yield is high, which is obviously higher than the yield in the literature of preparing flurbiprofen by means of Grignard reaction.

The invention discloses a method for synthesizing alpha-alkenyl boron ester by Markov hydroboration of terminal alkyne, which comprises the following steps of: under the protection of inert gas, carrying out hydroboration reaction on a terminal alkyne compound shown as a formula I and pinacolborane which are used as raw materials and an amide oxazoline cobalt complex which is used as a catalyst in an organic solvent under the action of alkali; the alpha-alkenyl boron ester compound as shown in the formula II is prepared. The invention provides the cobalt complex catalyst with high efficiency, high selectivity and high substrate compatibility and the method, the reaction condition is mild, the operation is simple and convenient, the atom economy is high, and the product yield and the selectivity of the product are improved. When the catalyst is used for a gram-level amplification reaction, a crude product can be purified in a recrystallization or distillation manner, so that the purification step is greatly simplified, and the technical problems of difficulty in separation and low yield in a reaction amplification process of synthesizing alpha-alkenyl boron ester by Markov hydroboration of terminal alkyne in the prior art are solved; and the method has a relatively high industrial application value.

The application discloses a 2-phenyl-4-pinacol boron-based-2,1-boronazanaphthalene, a 2-phenyl-4-pyrimidyl-2,1-boronazanaphthalene compound and a preparation method thereof, and belongs to the technical field of organic synthesis chemistry. The method is based on a copper-catalyzed selective dehydrogenation boronation reaction strategy, 2-phenyl-2,1-boronazanaphthalene and pinacol diboron ester are used as raw materials, CuCl is used as a catalyst, 4,5-bis(diphenylphosphino)-9,9-dimethyloxyanthracene is used as a ligand, 2-adamantanone is used as an additive, p-xylene is used as a solvent, and 2-phenyl-4-pinacol boron-based-2,1-boronazanaphthalene is efficiently obtained. The 2-phenyl-4-pinacol boron-based-2,1-boronazanaphthalene compound synthesized by the application can be used as a key intermediate, is efficiently converted through a C-B bond, and is convenient for synthesizing a 2-phenyl-4-pyrimidyl-2,1-boronazanaphthalene compound, thereby providing a new way for functional modification of boronazacyclic compounds.

This invention discloses a boron difluoride complex containing non-alternating conjugated ligands, its preparation method, and its applications. The boron difluoride complex is a compound of formula (I) or a salt thereof; wherein R is C 1～4 Alkyl, halogen, cyano, pinacol borate ester, formaldehyde, nitro, phenyl, C 1～4 Alkoxycarbonyl, C 1～4 Alkyloxy, C 1～3 One or more alkoxy groups. The fluorescent dye has a simple synthesis process, mild reaction conditions, low synthesis cost, high yield, and low toxicity, making it suitable for large-scale industrial production.

This invention discloses a method for preparing single-walled carbon nanotubes, belonging to the technical field of single-walled carbon nanotubes. In preparing single-walled carbon nanotubes, chemical vapor deposition is used to grow them. The grown single-walled carbon nanotubes are then acid-washed, followed by sorting and purification using a polymer dispersant. Finally, the polymer dispersant is removed to obtain the single-walled carbon nanotubes. The polymer dispersant is obtained by reacting a fluorene-terminated surfactant with diaminobipyridine. The fluorene-terminated surfactant is obtained by polymerizing 9,9-di-n-octylfluorene-2,7-diboronate dipinal ester and a quaternary ammonium salt containing 2,7-dibromofluorene, followed by end-capping with 5-aldehyde-2-thiophene borate pinalol ester. The single-walled carbon nanotubes obtained by this invention have high purity and high conversion rate.

The invention belongs to the field of medical chemistry, and discloses Ilunocitinib as well as a preparation method and application thereof. 4-pyrazole boronic acid pinacol ester (I) is used as an initial raw material, the initial raw material and 3-(cyanomethylene) azetidine-1-tert-butyl formate (II) are subjected to a Michael addition reaction to prepare a compound III, and the compound III and the compound IV are subjected to a catalytic coupling reaction to prepare a compound V; removing a Boc protecting group from the compound V under an acidic condition to prepare a compound VI; carrying out sulfonamide reaction on the compound VI and cyclopropyl sulfonyl chloride in an organic solvent to obtain a compound VII; and removing a protecting group from the compound VII under an alkaline condition to obtain a final product Ilunocitinib. The preparation method of the Ilunociitinib has the advantages that the raw materials are easy to obtain, the process is simple, the operation is convenient, the reaction yield is higher than that recorded in the existing literature, and the industrial production is easy.

The invention discloses a hydrogen peroxide fluorescent probe based on a 7-hydroxyquinoline derivative as well as a preparation method and application of the hydrogen peroxide fluorescent probe. The fluorescent probe and a structural formula of the fluorescent probe are shown in the specification. According to the invention, 7-hydroxyquinoline is used as a bridge, (3, 5, 5-trimethylcyclohex-2-alkenyl) malononitrile and benzothiazole-2-acetonitrile are respectively used as strong electron withdrawing groups of a fluorescent probe molecule, and pinacol phenylboronic acid ester is used as a recognition group of H2O2 and is also used as a power supply group of the fluorescent probe molecule. The fluorescent probe molecules QCN and QSN have an obvious ICT effect, so that the probe molecules QCN and QSN emit fluorescence, and the prepared fluorescent probe shows high sensitivity and high selectivity on H2O2 in a solution. The preparation method of the fluorescent probes QCN and QSN has the advantages of simple steps, easily available raw materials, solid products, easy storage, wide application prospects, and large-scale production and application.

The invention discloses a high-temperature-resistant power cable and a preparation method thereof, copper wires are twisted to form a wire core, the surface of the wire core is sequentially coated with an insulating layer, a shielding layer and a protective layer, the high-temperature-resistant power cable is prepared, and the protective layer is reinforced resin. The reinforced resin comprises the following raw materials in parts by weight: 100-120 parts of functionalized polyethylene, 20-30 parts of a modified filler, 0.5-0.8 part of p-toluenesulfonic acid and 10-15 parts of 1, 4-bis (pinacol) diphenylboronic acid, the functionalized polyethylene and the modified filler form an organic-inorganic interpenetrating network under the action of the 1, 4-bis (pinacol) diphenylboronic acid, and the organic-inorganic interpenetrating network is formed by the modified filler and the 1, 4-bis (pinacol) diphenylboronic acid under the action of the 1, 4-bis (pinacol) diphenylboronic acid. The modified filler can form a thermal barrier network in the whole matrix, thermal motion of a polyethylene molecular chain is effectively hindered, meanwhile, a side chain of the functionalized polyethylene molecular chain contains a phenyl polysiloxane structure, the flexibility of a polyethylene chain segment can be improved, and the high-temperature-resistant effect of the material is greatly improved through cooperation with dynamic crosslinking.

The invention relates to the field of synthesis of organic compounds, in particular to a hydroboration reaction method for catalyzing ketone by a rare earth metal complex. The method for catalyzing the hydroboration reaction of the ketone by the rare earth metal complex comprises the following steps: mixing the rare earth metal complex, pinacolborane, the ketone and a solvent in an inert atmosphere, and reacting, the general chemical formula of the rare earth metal complex is RE (OTf) 3, and RE is a rare earth element. According to the method for catalyzing the hydroboration reaction of the ketone by using the trifluoromethanesulfonic acid rare earth metal (RE (OTf) 3), the catalyst is a commercial product and is low in price, simple and convenient to operate, high in reaction activity, wide in substrate range and high in yield.

The invention discloses a boron modified ternary polyacrylonitrile precursor and carbon fiber preparation method, and belongs to the field of carbon fiber preparation, and the preparation method comprises the following steps: under the protection of nitrogen, dissolving a first monomer acrylonitrile, a second monomer itaconic acid and a third monomer (E)-1-pentene-1, 2-bis (pinacol) diboronic acid in a solvent; reacting under the action of an initiator to obtain an acrylonitrile terpolymer, and carrying out subsequent treatment to prepare a polyacrylonitrile precursor; and pre-oxidizing, carbonizing and graphitizing the precursor to obtain the final carbon fiber. The third monomer contains two boron atoms, the boron element can be uniformly distributed in the fiber when the third monomer is used as a comonomer, the catalytic graphitization effect of boron is fully played, the high-modulus carbon fiber is obtained at a low temperature, the preparation cost of the high-modulus carbon fiber is greatly reduced, and the method has a certain application prospect.

The application discloses 2-boronic acid pinacol ester-9,9'-spirobis(xanthene) and a synthesis method thereof, and belongs to the field of organic chemical synthesis. A structural formula of the 2-boronic acid pinacol ester-9,9'-spirobis(xanthene) is as follows: the 2-boronic acid pinacol ester-9,9'-spirobis(xanthene) is synthesized by the following method: 2-bromoxanthone is used as a starting material, reacts with phenol to synthesize 2-bromo-9,9'-spirobis(xanthene), and then is subjected to Suzuki-Miyaura reaction to synthesize. The synthesis method is simple in operation, low in production cost, and high in product content (greater than 99.9%); the synthesis method can meet the requirements of industrial production and application, is suitable for industrial production, and expands the application of spiro compounds as intermediates in the design and synthesis of organic optoelectronic functional materials.

The invention relates to the technical field of polymer composite materials, and particularly discloses a nano-composite self-repairing cable sheath material and a preparation method thereof. The invention discloses a nano composite self-repairing cable sheath material. The cable sheath material is prepared from the following raw material components in parts by weight: 110 to 130 parts of organic silicon-polyurethane block copolymer, 2.5 to 4.5 parts of silane treatment filler and 2 to 6 parts of microcapsules, the organic silicon-polyurethane segmented copolymer is prepared from the following raw materials: a polyurethane prepolymer, amino silicon oil, dithiodipropionate and 1, 4-benzene bis (pinacol) diborate; the microcapsule is prepared from the following raw materials: urea, a formaldehyde solution and polydimethylsiloxane; the silane-treated filler is prepared from the following raw materials: a carbon nano tube, nano titanium dioxide and a silane coupling agent. The sheath material disclosed by the invention has relatively good self-repairing performance and tensile strength.

The invention relates to the technical field of benzene selenate compound ortho-position selective C-H bond boronation, in particular to a lewis acid promoted benzene selenate compound ortho-position selective C-H bond boronation method which comprises the following steps: under the action of lewis acid, benzene selenate shown in a formula (I) and boron trihalide are subjected to a C-H bond boronation reaction, and the benzene selenate compound shown in the formula (II) is obtained. Preparing a compound as shown in a formula (II) under the protection of pinacol; wherein R is independently selected from any one of hydrogen, C1-C6 alkyl, halogen and C6-C14 aryl. Cheap lewis acid is used for promoting, through coordination of boron trihalide and carbonyl in the benzene selenate compound, the benzene selenate compound is subjected to a C-H bond boronation reaction, then under protection of pinacol, a series of benzene selenate borate compounds are obtained, and the method is high in site selectivity and low in cost.

This invention provides a method for the catalytic hydroboration of nitrile compounds, belonging to the field of nitrile reduction technology. The method uses nitrile compounds as substrates, molybdenum hexacarbonyl as a catalyst, and pinacolborane as a hydrogen source, with the hydroboration reaction occurring at 78-82°C for 7.5-8.5 h. The reaction utilizes molybdenum hexacarbonyl as a catalyst, which is simple and readily available, requiring no complex synthesis. Furthermore, the reaction process does not require the participation of ligands. Using pinacolborane as a hydrogen source eliminates the need for strictly nitrogen-protected experimental conditions, enabling the hydroboration of nitriles. The substrate applicability is broad, applicable not only to aromatic nitriles but also to aliphatic nitriles and even some dinitriles. The reaction process does not require solvents, making it environmentally friendly. The corresponding hydroboration product is obtained directly after the reaction without further purification, and the reaction yield is high, ranging from 84-100%.