13 results about "Stannane" patented technology

The present invention provides a method for preparing an organostannane compound catalyzed by diethylzinc, belonging to the technical field of preparing stannane compounds. The method can solve the problems urgently needed to be solved in the preparation method of such stannane compounds. The method comprises: mixing an acetylene compound, a tin hydrogen compound, and a diethylzinc catalyst under an inert atmosphere; reacting the reaction system at 60 to 70°C for 18 to 24 hours, then exposing the reaction system to air to terminate the reaction, and purifying the organostannane compound by column chromatography, wherein the inert atmosphere is nitrogen. The stannane compound is a vinyl stannane compound or an ethynyl stannane compound, and the acetylene compound is an aliphatic acetylene compound or an aromatic acetylene compound. The present invention solves the problems urgently needed to be solved in the preparation method of such organostannane compounds, such as the high cost of the catalyst used, the environmentally unfriendly nature of the catalyst, and the complex operation process.

Fire protection structure, at least comprising or consisting of: a first case and a second case; where the first shell surrounds or encloses an interior space, the interior space is suitable for accommodating a cable, a conduit or a pipe or sections thereof; wherein the first shell contains or consists of at least one aerogel; wherein the second shell surrounds or encloses the first shell; wherein the second shell contains or consists of a material that expands when exposed to heat, preferably a fire-resistant material; wherein the heat-expandable material is expandable graphite, a combination of a first coating material and a primer, or a combination of the first coating material and a second coating material and the primer; wherein the primer contains or consists of a primer, a hardener and a thinner, the primer contains: Xylene (CAS No. 1330-20-7); Hydrocarbons, C9, Aromatics (CAS No. 64742-95-6); Reaction product: Bisphenol-A-epichlorohydrin resins with an average molecular weight of 700 to 1100 (CAS No. 25068-38-6); Butan-1-ol (CAS No. 71-36-3); Trizinc bis(orthophosphate) (CAS No. 7779-90-0); Ethylbenzene (CAS No. 100-41-4); 4-Hydroxy-4-methyl-pentan-2-one (CAS No. 123-42-2); Solvent naphtha (petroleum), lightly flavored (CAS No. 64742-95-6); and Silicon dioxide (CAS No. 7631-86-9); the hardener contains: Hexamethylene-1,6-diisocyanate, homopolymer (CAS No. 28182-81-2); Hydrocarbons, C9, Aromatics (CAS No. 64742-95-6); Hexamethylene-1,6-diisocyanate (CAS No. 822-06-0); Dimethylbis[(1-oxoneodecyl)oxy]stannan (CAS No. 68928-76-7); and n-Butyl acetate (CAS No. 123-86-4); and containing the thinner: Xylene (CAS No. 1330-20-7); Butan-1-ol (CAS No. 71-36-3); Ethylbenzene (CAS No. 100-41-4); and n-Butyl acetate (CAS No. 123-86-4.

The application provides a high-voltage and high electrochemical performance electrolyte for a low-temperature lithium ion battery, a preparation method and application thereof, and belongs to the technical field of low-temperature lithium ion batteries.The electrolyte comprises the following components: a lithium salt, a base solvent and a non-solvated cosolvent; the base solvent is one or a combination of two or more of linear siloxanes or nitriles; the non-solvated cosolvent is one or a combination of two or more of fluorinated silanes or stannanes; and the volume ratio of the base solvent and the non-solvated cosolvent is 5-9:1-5.The pseudo-coordination bond between Sn (Si) in the non-solvated cosolvent and O (N) in the base solvent can be used to effectively adjust the solvation structure of the electrolyte, so that high ion conductivity at low temperature is achieved; and the prepared electrolyte is applied to a lithium ion battery, and exhibits excellent high-voltage and long cycle stability and other electrochemical performances at low temperature, so that the electrolyte has a good application prospect.

The application discloses a selenoglycoside compound and a synthesis method, and aims at a series of technical defects in the existing selenoglycoside synthesis technology, such as high reagent toxicity, strong irritability, poor stability, harsh reaction conditions, complicated operation, insufficient stereoselectivity, poor substrate universality and difficulty in industrial application, and provides a green and efficient selenoglycoside compound synthesis method with strong universality, which has remarkable beneficial technical effects. The core reaction substrate adopted in the application is a glycosyl selenosulfonate and a (hetero) aryl boronic acid, both of which are conventional reagents easy to obtain, have no irritating odor, and have excellent chemical stability and environmental tolerance, thereby avoiding the use of high-toxicity, high-irritability and low-stability reagents such as diselenide, selenol and glycosyl stannane in the traditional synthesis process from the source, greatly reducing the safety control cost and three-waste treatment pressure in the synthesis process, and meeting the development requirements of green chemistry.

A synthesis method of electronic-grade hexafluorobutadiene comprises the following steps: adding alkali, a phosphino ligand, a catalyst and an organic solvent into a reaction container, adding a stannane coupling reagent under the protection of inert gas, then cooling a reaction kettle, then adding halogenated trifluoroethylene, heating the reaction kettle, maintaining the reaction time for 2-24 hours, and after the reaction is finished, cooling the reaction kettle to obtain the electronic-grade hexafluorobutadiene. According to the method, a one-step coupling method is adopted, operation is easy and convenient, the problems of yield loss and separation of multi-step synthesis are solved, reaction conditions are mild, energy consumption is low, byproducts are few, high-selectivity conversion can be achieved through an optimized catalytic system, and the method is suitable for industrial production. Meanwhile, the raw materials are easy to obtain, the three wastes are few, and the industrial application potential is remarkable.

The invention provides a high-voltage and high-electrochemical-performance electrolyte for a low-temperature lithium ion battery as well as a preparation method and application of the high-voltage and high-electrochemical-performance electrolyte, and belongs to the technical field of low-temperature lithium ion batteries. The electrolyte comprises the following components: a lithium salt, a basic solvent and a non-solvated cosolvent, the basic solvent is one or a combination of more than two of linear siloxane or nitrile; the non-solvated cosolvent is one or a combination of more than two of fluoride silane or stannane; the volume ratio of the basic solvent to the non-solvated cosolvent is (5-9): (1-5). According to the invention, a pseudo coordinate bond is formed between Sn (Si) in the non-solvated cosolvent and O (N) in the basic solvent, so that the solvated structure of the electrolyte can be effectively adjusted, and high ionic conductivity at low temperature is realized; the prepared electrolyte is applied to a lithium ion battery, shows excellent electrochemical properties such as high voltage and long cycle stability at low temperature, and has a good application prospect.

Methods for the solvent-free depolymerization of a polyamide are provided which, in embodiments, comprise combining a polyamide and a lanthanide-organic catalyst comprising a lanthanide metal bound to at least one ligand, to depolymerize the polyamide to a product, wherein the at least one ligand is selected from benzyl and those having a formula -EHm(XRn)2. In this formula, E is selected from N, P, C, Si, Ge, and Sn; X is selected from H, N, P, C, Si, Ge, and Sn; R is selected from H, alkyl, aryl, alkoxyl, silyl, germyl, and stannyl; wherein if E is N or P, then m=0 and if E is C, Si, Ge, or Sn, then m=1; and further wherein n is from 2 to 3.

The present invention relates to the technical field of electrochromic materials, and in particular to a thiophene derivative and its preparation method and application as well as an electrochromic film and its preparation method. In the present invention, 2,5-bis(4'-bromophenyl)-3,4-ethylenedioxythiophene and tributyl(3,3-dimethyl-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxane-6-yl)stannane are used to prepare the required 2,5-diphenyl-3,4-ethylenedioxythiophene derivative in combination with a catalyst and a solvent. The derivative is then polymerized into an electrochromic material by cyclic voltammetry, which can change color at a voltage of 0 to 0.9V, and there is no obvious attenuation of the optical contrast under a wavelength range of 469nm after 600 cycles.

The present invention discloses a method for synthesizing arylstannane compounds using ZnO@GO piezoelectric catalysis. The method uses an aryl diazonium salt and a simple stannane compound as substrates, a ZnO@GO composite material as a piezoelectric catalyst, and a common solvent as an auxiliary grinding agent. The synthesis of the arylstannane compound is piezoelectrically driven by the mechanical force provided by a ball mill at room temperature. The method of the present invention utilizes a wide range of raw materials and is low in cost. The method uses only trace amounts of organic solvents, conforming to the principles of green chemistry. The reaction can be carried out at room temperature under mild conditions. The method uses only a small amount of catalyst to achieve a high conversion rate. The method has the advantages of being simple to operate, conforming to the principles of green chemistry, and being highly practical.

The present invention relates to the technical field of electrochromic thin films, and in particular to a terthiophene derivative and a preparation method and application thereof, as well as an electrochromic thin film and a preparation method thereof. In the present invention, 5,5"-dibromo-2,2':5,2"-terthiophene, tributyl(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)stannane, a catalyst and a solvent are mixed under a protective atmosphere, and a reaction is performed to obtain a terthiophene derivative. The derivative can be applied to an electrochromic thin film; the present invention successfully prepares an electrochromic thin film that is purple in a neutral state, transparent in an oxidized state, can change color at a voltage of 0.3 to 0.7V, has a fast response time, high optical contrast and good stability by electrochemically polymerizing the terthiophene derivative.

The invention relates to a method for macroscopically preparing a stable two-dimensional conjugated polymer through a cross-coupling reaction at room temperature. The preparation method comprises the following steps: respectively dissolving aryl halide, aryl stannane, a methanesulfonic acid (tri-tert-butylphosphino) (2 '-amino-1, 1'-biphenyl-2-yl) palladium (II) (namely P (t-Bu) 3Pd G3) catalyst and alkali in tetrahydrofuran, preparing a mixed solution from tetrahydrofuran solutions of the aryl halide, the aryl stannane and the alkali, then dropwise adding the tetrahydrofuran solution of the P (t-Bu) 3Pd G3 into the mixed solution, and reacting for 2-4 hours at the temperature of 50-60 DEG C to obtain a target product. Reacting at room temperature to obtain a mixture; and precipitating, washing and filtering to obtain the two-dimensional conjugated polymer. The reaction is high in universality, two-dimensional conjugated polymers with various different topologies (including hexagons, triangles, rhombuses and squares) can be synthesized, and the method can be widely applied to the fields of organic photoelectricity, chemical separation, photocatalysis and the like.

Disclosed herein are a method for producing pirandolide D and a crystal of a solvate of pirandolide D, the method comprising a step of reacting a compound represented by Formula (A1) with a compound represented by Formula (B1) in the presence of a metal catalyst to obtain a compound represented by Formula (C1) (in these formulae, (In the formula, X represents hydrogen, an optionally substituted boron group, an optionally substituted stannyl group, or an optionally substituted silyl group, R4 is hydrogen or the like, R5 is an optionally substituted benzoyl group or the like, and R1 and R2 are each independently hydrogen or the like). # imgabs0 #

The application provides a non-classical C-glycoside and a stereospecific synthesis method and application thereof, and the synthesis method comprises the following steps: taking a non-classical sugar-based stannane as a nucleophilic reagent, taking a halogenated hydrocarbon as an electrophilic reagent, and performing a Stille cross-coupling reaction to obtain the non-classical C-glycoside. The non-classical C-glycoside and the stereospecific synthesis method and application thereof provided by the application have the advantages that the synthesis method is simple in process, convenient in operation, high in yield, good in functional group tolerance, strong in stereospecificity, wide in sugar substrate range, and compatible with unprotected sugar and an aqueous phase system; furthermore, the obtained non-classical C-glycoside not only has better antibacterial activity, but also can be used as an active pharmaceutical material, and promotes the technological progress of the pharmaceutical synthesis industry and the pharmaceutical industry.