23 results about "Trihalide" patented technology

Yttrium complexes and related methods are provided. A method of making an yttrium complex comprising contacting a metal alkyl cyclopentadienyl compound with an yttrium trihalide compound in a non-coordinating solvent to obtain a tris (alkyl cyclopentadienyl) yttrium complex. A composition includes a tris (alkylcyclopentadienyl) yttrium complex.

The invention relates to the technical field of medicines, in particular to a preparation method of calcium L-5-methyltetrahydrofolate. According to the method, N-(4-aminobenzoyl)-L-glutamic acid, 2, 4, 5-triamino-6-hydroxypyrimidine sulfate and propane trihalide are adopted as starting raw materials, and tetrahydrofolic acid is synthesized through a one-pot method; compared with synthesis of L-5-methyl calcium tetrahydrofolate by using high-purity folic acid as an initial raw material, the process route does not involve use of chemical reagents such as sodium borohydride, zinc powder and some noble metal catalysts any more, the reaction is easier to control, the cost is lower, the safety is higher, the method is more environmentally friendly, and industrial production is easier to carry out.

The invention relates to a novel bifunctionalization-based microporous organic network material as well as a preparation method and application thereof, and belongs to the technical field of microporous organic network materials. The invention aims to solve the technical problems of non-ideal adsorption performance, harsh preparation conditions, high energy consumption and poor pH applicability of the existing adsorbent. The preparation method of the novel bifunctional microporous organic network material comprises the following steps: dissolving a proper amount of cocatalyst cuprous iodide, a catalyst, reaction monomer rigid trialkyne and bifunctional aromatic trihalide in a mixed solvent, carrying out ultrasonic treatment, and carrying out magnetic stirring in an oil bath to obtain a head product; and washing the initial product, and carrying out vacuum drying to obtain the novel bifunctional microporous organic network material. The novel bifunctional microporous organic network material provided by the invention has relatively good hydrophilicity, and is beneficial to relatively good dispersion in an aqueous solution.

The invention relates to a preparation method of a rhodium-phosphine complex catalyst. The preparation method of the rhodium-phosphine complex catalyst comprises the following steps: providing an alcoholic solution of a bidentate phosphine ligand; in an inert gas atmosphere, sequentially dropwise adding an alcoholic solution of rhodium trihalide hydrate and a formaldehyde solution into the alcoholic solution of the bidentate phosphine ligand to obtain a premixed solution; and heating the premixed solution to a predetermined temperature, and reacting for a predetermined time to obtain the rhodium-phosphine complex catalyst. Wherein the bidentate phosphine ligand is one of molecules represented by a general formula (1): # imgabs0, R1 is selected from one of groups represented by a general formula (2.1), a general formula (2.2), a general formula (2.3) and a general formula (2.4): # imgabs1 # Ar1, Ar2, Ar3 and Ar4 are all aryl groups. The method is simple and easy to operate, the problem of tedious process does not exist, and the high yield of about 95% is achieved.

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.

The invention belongs to the technical field of olefin polymerization, and discloses a catalyst component for olefin polymerization reaction, a preparation method of the catalyst component, a catalyst and application of the catalyst component. A mode I comprises the following steps: (1) reacting a magnesium-containing compound, an aluminum-containing substance, an organic epoxy compound and an organic phosphorus compound to obtain a magnesium-containing reaction solution; the aluminum-containing substance is metal aluminum and / or aluminum trihalide; (2) reacting the magnesium-containing reaction liquid with an acyl halide compound; reacting with a first titanium-containing compound to obtain a catalyst component; optionally adding a first electron donor compound before and / or after the reaction with the first titanium-containing compound, and reacting; and (3) reacting the catalyst component obtained in the step (2) with a second titanium-containing compound to obtain the catalyst component, and optionally adding a second electron donor compound before and / or after the reaction with the second titanium-containing compound, and reacting. The polymer powder obtained by adopting the catalyst provided by the invention has obviously improved bulk density.

The application provides a preparation method of alkylaluminoxane and application thereof. The preparation method provided by the application uses ketone compounds to react with alkylaluminum to prepare alkylaluminoxane, avoids the introduction of water, is mild and controllable, has high product yield, and is cheap in raw materials. In addition, unlike the crystallization hydration method which produces a large amount of inorganic salt impurities and is complicated in post-treatment, the preparation method provided by the application has few by-products and is easy to separate and purify. Meanwhile, by adding boron trihalide as an initiator, the chain length of the prepared alkylaluminoxane is suitable, and the alkylaluminoxane prepared by the preparation method provided by the application has high yield. In particular, the alkylaluminoxane, especially methylaluminoxane, prepared by the preparation method provided by the application is used as a cocatalyst and is used in combination with a metallocene catalyst to catalyze ethylene polymerization, and it is found that the cocatalytic performance is excellent.

The invention relates to a preparation method of a phosphine compound, and the preparation method of the phosphine compound comprises the following steps: mixing a compound A, alkali, phosphorus trihalide and an organic solvent at a first temperature in an inert gas atmosphere to obtain a mixture; the compound A is one of molecules represented by the following general formula: the number of # imgabs0 # groups X is 1-6, the groups X are connected to any one of the sites 2, 3, 4, 5, 6 and 7 of indole, and the groups X are cyano groups or cyanoethyl groups. The phosphine compound can be obtained by directly reacting the compound A with phosphorus trihalide, the synthesis route is simple, and the process is easy to operate.

The invention discloses a preparation method of trialkyl boron, and belongs to the technical field of organic boron compounds. According to the preparation method, an alkyl aluminum compound or an alkyl zinc compound is taken as a first raw material, a boron-containing compound is taken as a second raw material, and trialkyl boron is synthesized through metal replacement reaction; the boron-containing compound is selected from boron trihalide or borate. A single-step metal replacement reaction path of an alkyl aluminum compound or an alkyl zinc compound and a boron-containing compound is adopted, so that the three defects of long synthesis route, high energy consumption and more byproducts in the prior art are remarkably overcome. Compared with a high-temperature and high-pressure seed method, the method has the advantages that the high yield is realized under the mild conditions of normal pressure and less than or equal to 120 DEG C, the energy is saved, and the high-pressure risk is avoided; compared with a multi-step organic metal method, the atom utilization rate is greatly increased, byproducts are reduced, and resource utilization can be achieved.

The invention relates to a thermosetting epoxy resin composition comprising an epoxy resin, a dihydrazide curing agent, a boron trihalide-amine complex, a substituted urea and at least one toughness improver. The composition, when cured at low curing temperatures, is characterized by good lap shear values combined with good impact peel and T-peel performance. The epoxy resin composition is especially suitable for use as a body adhesive.

The invention provides a method for preparing aromatic nitrile from an alkyl-substituted phenolic compound, and belongs to the technical field of compound synthesis, the method comprises the following steps: dissolving the alkyl-substituted phenolic compound in a nitrile solvent, adding phosphorus trihalide, and stirring to obtain a first solution; dissolving nickel salt and zinc salt in a nitrile solvent, stirring, adding cyanide, stirring for the second time, and dehydrating to obtain a second dehydrated solution; and under the condition of introducing ammonia gas, adding the second dehydration solution and a reaction auxiliary agent into the first solution, and carrying out hydrocyanation reaction to prepare the aromatic nitrile compound. According to the method, the alkyl substituted phenolic compound is used as a raw material, efficient synthesis of aromatic nitrile is achieved through cooperation of all the steps, the phenolic compound in the industrial waste liquid is converted into a high-value chemical, and a new technical path is provided for treatment and resource utilization of the phenolic waste liquid.

The present disclosure relates to processes for the fluorination of molecules. One aspect provides a process for incorporating a fluorine atom into a molecule, said process comprising converting a compound of formula X-SG into a compound of formula X-F, wherein G is an optionally substituted C1-C6 alkyl group, an optionally substituted aryl group, or an optionally substituted heteroaryl group, and X is an organic group; and wherein the SG group is attached to a secondary or tertiary carbon atom in the organic group X; said process comprising treating said compound of formula X-SG with (i) an activator compound selected from the group consisting of N-halosuccinimides, N-halobenzenesulfonimides, N-halobenzenesulfonamides, dialkylaminodihalosulfinium salts, heterocyclylaminodihalosulfinium salts, dialkylaminosulfur trihalides, XeF2, difluoroiodotoluene, di- and tri-bromoisocyanuric acids, bromine, chlorine, hypervalent iodine compounds with I2; and other sources of Br+, Cl+, F+, I+, bromonium, iodonium, or chloronium; and (ii) a source of fluoride. Uses of the process in the preparation of various fluorinated molecules as well as uses of certain compounds as intermediates in the processes of the present disclosure are also provided.

The invention relates to the technical field of preparation of aluminum alkyl, in particular to a preparation method of aluminum alkyl, and aims to solve the problems that flammable and explosive hydrogen needs to be used, a large amount of time and material equipment need to be consumed, the product yield is low due to complex reaction, and the cost is low in the prior art in the preparation of aluminum alkyl. And the aluminum powder is difficult to separate from the metal salt generated by the reaction, and the like. The invention relates to a preparation method of aluminum alkyl, which comprises the following step of: reacting alkali metal hydride serving as a hydrogen source with aluminum trihalide and olefin to prepare the aluminum alkyl.

This invention relates to the field of selective hydroxylation technology for aromatic compounds, specifically to a boron-mediated hydroxylation method for 1-phenylpyrazole compounds, comprising the following steps: under the action of boron trihalide, a base, and an oxidizing agent, the 1-phenylpyrazole compound represented by formula (I) undergoes a C-H bond borination reaction with boron trihalide, followed by an oxidation reaction to obtain the compound represented by formula (II); wherein, R 1 and R 2 Individually selected from hydrogen, C1-C6 alkyl groups, phenoxy groups, N,N-dimethyl groups, halogens, thiophene groups, and C6-C6 groups respectively. 14 Any of the aryl groups. This invention does not use any metal catalysis. By coordinating boron tribromide with the directing group pyrazole, the 1-phenylpyrazole substrate first undergoes a C-H bond borylation reaction, and then, under the action of an oxidant, a series of 1-(2-hydroxy)-1H-pyrazole compounds are obtained. This method is efficient, low-cost, and environmentally friendly.

The invention relates to a composition containing supported epsilon / epsilon '-iron carbide and chi-iron carbide as well as a preparation method and application of the composition. The method comprises the following steps: preparing a supported epsilon / epsilon'-iron carbide compound; preparing a load type x-iron carbide compound; and mixing the supported epsilon / epsilon '-iron carbide compound with the supported chi-iron carbide compound to obtain a composition containing the supported epsilon / epsilon'-iron carbide and the chi-iron carbide, or providing a supported iron carbide mixture comprising supported epsilon / epsilon '-iron carbide and supported chi-iron carbide, and carrying out dipping treatment on the supported iron carbide mixture through a third halide solution to obtain the composition containing supported epsilon / epsilon'-iron carbide and chi-iron carbide. According to the composition disclosed by the invention, halide ions are introduced, so that the synthesis gas conversion reaction has relatively high CO conversion rate and extremely low total CO2 selectivity.

The invention relates to a composition containing precipitated chi-iron carbide and epsilon / epsilon '-iron carbide as well as a preparation method and application of the composition, and the method comprises the following steps: mixing a precipitated epsilon / epsilon'-iron carbide compound and a precipitated chi-iron carbide compound to prepare a precipitated iron carbide composition containing chi-iron carbide and epsilon / epsilon '-iron carbide; or mixing the precipitated epsilon / epsilon '-iron carbide and the precipitated x-iron carbide, and carrying out third dipping treatment on the obtained mixture through a third halide solution to prepare a precipitated iron carbide composition containing x-iron carbide and epsilon / epsilon'-iron carbide; the third halide solution comprises iodide ions and / or bromide ions. The composition disclosed by the invention is used as a catalyst for a synthesis gas conversion reaction, so that the reaction has relatively high CO conversion rate, extremely low total CO2 selectivity and low CH4 selectivity, and comprehensive optimization of a reaction result is realized.

Methods for forming yttrium complexes are provided herein. A method for forming a yttrium complex comprises contacting a yttrium trihalide adduct with a cyclopentadienyl compound in a presence of a solvent to form a yttrium complex. Compositions are provided. A composition comprises a precursor compound. The precursor compound comprises a yttrium complex formed according to the methods disclosed herein. Various other methods and compositions are provided herein.

The application discloses a method for catalyzing alpha-C-H halogenation of carboxylic acid based on a needle tip electrostatic field, and belongs to the technical field of catalytic chemistry. Alpha-C-H containing carboxylic acid and a metal bromide salt are selected as reaction substrates, a local electrostatic field is applied by a metal needle tip of a scanning tunneling microscope (STM), alpha-bromination of the carboxylic acid is induced under normal temperature and without an additional chemical catalyst, and alpha-brominated carboxylic acid is synthesized. Compared with a traditional HVZ reaction, the method avoids the use of a highly toxic reagent such as phosphorus trihalide and harsh high-temperature conditions, so that the reaction process is more green and mild, and no additional halogenating agent or catalyst needs to be introduced, thereby providing a new path for synthesis of alpha-brominated carboxylic acid, which is environment-friendly, simple to operate and does not depend on toxic reagents.

A method of manufacturing silicon nano-powders and a manufacturing equipment implementing such method. The method according to the invention utilizes a plurality of aluminum powders to react with a silicon tetrahalide into a plurality of silicon nano-powders and an aluminum trihalide to obtain the silicon nano-powders.

The invention discloses a dyeing-free gradient polyacrylamide gel prepared by a one-step method. The gradient gel is composed of two separation gel gradients with different concentrations. The gel components comprise a Tris-HCl buffer solution, acrylamide, N, N '-methylene bisacrylamide, a trihalide compound, lauryl sodium sulfate, an ammonium persulfate solution, a glycerol aqueous solution and tetramethylethylenediamine. The polyacrylamide gel provided by the invention can be used for preparing gel by a one-step method, and after electrophoresis, a clear protein band can be presented by irradiating for 60-90s under 300nm ultraviolet light. The gradient gel has the advantages of high resolution, clear strip, good separation effect, low toxicity and the like. The components in the formula are combined, so that the gradient glue is more suitable for automatic glue filling equipment, and automatic production of the gradient glue is realized.

Methods for forming yttrium complexes are provided herein. A method for forming a yttrium complex comprises contacting a yttrium trihalide adduct with a cyclopentadienyl compound in a presence of a solvent to form a yttrium complex. Compositions are provided. A composition comprises a precursor compound. The precursor compound comprises a yttrium complex formed according to the methods disclosed herein. Various other methods and compositions are provided herein.

The application discloses a preparation method of 4-chloropyrrolopyrimidine and belongs to the technical field of synthesis of medical intermediates. 7H-pyrrolo[2,3-D]pyrimidine is used as raw material to react with deprotonation base and boron trihalide, then selective oxidation is carried out in the presence of hydrogen peroxide, no purification is carried out, then the reaction is carried out with alkali, 7H-pyrrolo[2,3-D]pyrimidine-3-oxide is generated, finally, the reaction is carried out with phosphorus oxychloride in the presence of lithium chloride, and 4-chloropyrrolopyrimidine is obtained. In the application, 7H-pyrrolo[2,3-D]pyrimidine is used as raw material, boron trihalide is used to protect the pyrrole and the nitrogen atom at the ortho position, the oxidation yield of the target nitrogen atom can be greatly improved, the generation of by-products is reduced, the operation is simple, the overall yield is high, and the application provides a route reference for synthesizing the compounds.

The present invention relates to thermosetting epoxy resin compositions comprising an epoxy resin, a dihydrazide curing agent, a boron trihalide-amine complex, a substituted urea and at least one toughness improver. The compositions feature good lap shear values in combination with good impact peel and T-peel properties when cured at a low curing temperature. The epoxy resin compositions are especially suitable for use as bodywork adhesive.