19 results about "Acetate compound" patented technology

The present invention relates to halogenated alkenylalkoxymethyl ether compounds of the following general formula (1): R 1 CH2OCH2OCH2CH2CH=CH(CH2) a X 1 (1), wherein R 1 represents a hydrogen atom, a n-alkyl group having 1 to 9 carbon atoms, or a phenyl group, X 1 represents a halogen atom, and a represents an integer of 3 to 14. The present invention also relates to a method for producing terminal conjugated alkadien-1-yl acetate compounds of the following general formula (5): CH2=CHCH=CH(CH2) a OAc (5), wherein a is defined as above, and Ac represents an acetyl group, and a method for producing terminal conjugated alkadien-1-ol compounds of the following general formula (6): CH2=CHCH=CH(CH2) a OH (6), wherein a is defined as above.

The invention discloses a chiral alpha-aryloxy benzoxazole acetate compound and a synthesis method thereof, and the chiral alpha-aryloxy benzoxazole acetate compound is an optically active compound with a structure as shown in the following formula I, and comprises a stereoisomer with the same chemical general formula. According to the method, a complex formed by a chiral ligand and metal is used as a catalyst, an electrochemical catalysis asymmetric aryloxylation reaction is used as a key step, and the target chiral compound is accurately and efficiently synthesized with high yield and high stereoselectivity. The preparation method is simple, reaction conditions are mild, atom economy is excellent, and the prepared chiral alpha-aryloxy benzoxazole acetate compound has good biological activity potential, can be widely applied to the field of drug intermediate synthesis and has remarkable biomedical practicability and industrial large-scale production prospects.

The invention belongs to the technical field of medicine synthesis, and provides a preparation method of compounds as shown in formulas 5 and 2 and a preparation method of cannabidiol. The preparation method of the compound as shown in the formula 5 comprises the following steps: in the presence of an imide catalyst and a cocatalyst, oxidizing a compound as shown in a formula 4 by oxygen-containing gas to obtain a product containing the compound as shown in the formula 5; the co-catalyst is selected from at least one of an aldehyde compound, an acetic acid metal compound and an acetylacetone metal compound. According to the preparation method, the reaction efficiency can be remarkably improved and the production cost can be reduced under a milder oxidation condition.

The invention discloses a catalyst component for olefin polymerization as well as a preparation method, a catalyst and application thereof, and relates to the technical field of olefin polymerization. The catalyst component for olefin polymerization comprises reaction products of the following components: a magnesium compound, an organic anhydride compound, an acetate compound, an alcohol compound, a titanium-containing compound and an internal electron donor, the molar ratio of the magnesium element in the magnesium compound to the organic acid anhydride compound to the acetate compound to the alcohol compound to the titanium-containing compound to the internal electron donor is 1: (0.03-1.0): (0.01-5): (0.1-10): (0.5-120): (0.01-1). According to the invention, when an organic anhydride compound, an acetate compound, an alcohol compound and the internal electron donor are introduced into an N-series polyolefin catalyst preparation system as a compound electron donor, spherical or sphere-like solid particles (solid catalyst components) containing magnesium and titanium can be prepared. The catalyst particles are high in polymerization activity and narrow in particle size distribution, and polyethylene powder with high bulk density can be obtained through polymerization. Under further preferable conditions, the powder obtained through polymerization is high in sphericity degree, high in molecular weight and good in fluidity.

The invention provides a catalyst component for olefin polymerization, a preparation method of the catalyst component, a catalyst and application of the catalyst component. The catalyst component comprises a magnesium compound, an organic anhydride compound, an acetate compound, an alcohol compound, a titanium-containing compound and a reaction product of an internal electron donor. The magnesium compound is a compound formed by dissolving magnesium halide in a solvent system containing an organic epoxy compound and an organic phosphorus compound. The catalyst particles are high in polymerization activity and narrow in particle size distribution, polyethylene powder which is high in stacking density, good in particle morphology, high in molecular weight and narrow in molecular weight distribution can be obtained through polymerization, and the requirement of an industrial production device for the catalyst is met.

The invention is directed to a process to prepare aluminium diacetate chloride starting by reacting aluminium trichloride with an acetate compound in a solvent, wherein the acetate compound is alkali acetate and wherein the solvent is a mixture comprising an alcohol and an organic acetate, wherein the molar ratio of aluminium trichloride and the alkali acetate compound is between 1:1.5 and 1:3 and wherein a corresponding alkali chloride salt is obtained as a by-product.

This invention relates to a recycled raw material composition and its preparation method. The recycled raw material composition comprises recycled bis(2-hydroxyethyl) terephthalate formed by the depolymerization of waste polyester, wherein the peak area ratio of acetate compounds is 1.0% or less when analyzed by high performance liquid chromatography (HPLC). Due to the reduced impurity content, this recycled raw material composition can exhibit high purity and high quality.

The invention discloses a fluoride-free water repellent synthesized based on an acrylic acid docosyl ester compound. The fluoride-free water repellent is prepared by the following steps: step 1, emulsifying the acrylic acid docosyl ester compound, a functional acrylic monomer, a polar olefin compound, a thiol compound, an acetate compound, a surfactant and water; 2, introducing inert gas into the reactant emulsion, heating to a reaction temperature, adding an initiator, and reacting for a preset time to obtain a fluoride-free water repellent emulsion; and the docosyl acrylate compound is docosyl acrylate or docosyl methacrylate. The water repellent is synthesized by adopting the docosyl acrylate compound as a main monomer, the fluorine-free water repellent emulsion synthesized by adopting an emulsion polymerization method has the solid content of more than 30%, and the fluorine-free water repellent emulsion has excellent storage stability and more excellent hydrophobicity and water repellency.

The invention discloses a synthesis method of a hexadecatrienol acetate compound and application of the hexadecatrienol acetate compound as a conopomorpha sinensis sex pheromone attractant. By adopting a convergent synthesis strategy, two key pheromone compounds, namely 4-trans, 6-cis, 10-cis-hexadecatrienol acetate and 4-trans, 6-cis, 10-cis-hexadecatrienol acetate, are successfully prepared, so that not only is the synthesis efficiency remarkably improved, but also the characteristics of greenness and cleanness are achieved; the invention also provides an application of the hexadecatrienol acetate compound as a sex pheromone attractant for conopomorpha sinensis, and the hexadecatrienol acetate compound can be effectively used for monitoring and green prevention and control of conopomorpha sinensis, so that the use of chemical pesticides is reduced, and the quality safety of fruits and the sustainable development of the ecological environment are guaranteed.

The application belongs to the technical field of medicine, and particularly relates to a styrene acetate compound, a preparation method and application thereof. The application provides a styrene acetate compound with a structure shown in formula 1. The styrene acetate compound with the structure shown in formula 1 provided by the application can play a role of inhibiting RAC1 activity by being combined with RAC1 protein, and is suitable for treating diseases related to RAC1 protein, including Alzheimer's disease, atherosclerosis, tumor cell migration and tumor cell invasion, etc. The results of the examples also show that the styrene acetate compound with the structure shown in formula 1 provided by the application can significantly inhibit the formation of cytoskeleton of tumor cells such as breast cancer and gastric cancer, thereby playing a role of inhibiting the migration and invasion activity of tumor cells.

The invention belongs to the field of organic chemistry and biosynthesis, and particularly relates to a specific high-activity hydrolase, a gene, an engineering bacterium and application, the specific high-activity hydrolase is obtained by mutation of an original hydrolase, the sequence of the original hydrolase is SEQ ID NO.1, the mutation is as follows: the 160th site is mutated from A to D, the 254th site is mutated from V to S, or the 160th site is mutated from A to D, and the 254th site is mutated from V to S; the 160th site is mutated from A to D, and the 254th site is mutated from V to S; the method is used for catalyzing hydrolysis of a substrate, and the substrate is a steroid 21-hydroxy acetate compound; the conversion condition is mild, and no organic solvent needs to be added; the conversion specificity is high, and no by-product is generated; and the product purity and yield are high.

The invention relates to a catalyst component for olefin polymerization, a preparation method of the catalyst component, a catalyst and application of the catalyst component. The catalyst component for olefin polymerization comprises reaction products of the following components: a magnesium compound, an organic anhydride compound, an acetate compound, a first alcohol compound, a titanium-containing compound and an organosilicon compound, the magnesium compound is a compound formed by dissolving magnesium halide in a solvent system containing an organic epoxy compound and an organic phosphorus compound. According to the present invention, the performance of the existing Ziegler-Natta type olefin polymerization catalyst particle is improved through the simple raw materials, the cost is low, and the prepared catalyst component is spherical / sphere-like, has advantages of excellent polymerization activity, excellent hydrogen regulation sensitivity, excellent stacking density, excellent particle size distribution, excellent viscosity average molecular weight, and extremely high promotion and application values.

The invention relates to a catalyst component for olefin polymerization, a preparation method of the catalyst component, a catalyst and application of the catalyst component. The catalyst component comprises a reaction product of a magnesium compound, an organic anhydride compound, an acetate compound, a first alcohol compound, a titanium-containing compound and an organosilicon compound, the general formula of the organic silicon compound is R1aR2b (OR3) cSi-M-Si (OR3 ') dR1'eR2'f. According to the invention, the performance of the existing Ziegler-Natta type olefin polymerization catalyst particles is improved, and the prepared catalyst component is spherical / sphere-like, has better polymerization activity, hydrogen regulation sensitivity, stacking density, particle size distribution and fluidity, and has extremely high popularization and application values.

The application discloses a method for catalytically synthesizing optically pure (S)-alpha-fluorophenylacetate compounds by P450 enzymes and belongs to the technical field of biological catalysis and chiral synthesis. In view of the problem that (S)-configuration fluorine-containing compounds are difficult to synthesize, the method uses alpha-fluorophenylacetate derivatives as substrates, uses a P450 BM3 mutant (F87V-L188G-R47L-Y51F) obtained through directional evolution as a catalyst, and performs an oxidative defluorination reaction in the presence of a coenzyme regeneration system to obtain a target product through kinetic resolution. The optically pure (S)-alpha-fluorophenylacetate compound has an optical purity ee>96% and can be used for preparing chiral fluorine-containing medical intermediates.

The application belongs to the technical field of catalysts, and discloses a catalyst component for ethylene polymerization, a preparation method, a catalyst and application, the catalyst component comprises the reaction products of the following components: 1) a spherical or spherical-like solid catalyst component B; 2) an alcohol compound; 3) a second organic epoxy compound; 4) a second titanium compound; 5) an electron donor selected from an electron donor a and / or an electron donor b; the spherical or spherical-like solid catalyst component B comprises the reaction products of a magnesium complex, an organic acid anhydride compound, an acetate compound and a first titanium compound. The catalyst has high polymerization activity for ethylene polymerization, and the prepared polyethylene powder has high molecular weight and low ash content.

The invention discloses an application of a lignite residue as a catalyst for catalytic synthesis of an oxime ether acetate compound and a preparation method of the oxime ether acetate compound. The method comprises the following steps: taking oximes and aryl diazonium ester compounds as raw materials, and taking the lignite residue (Zhaotong, Yunnan) as the catalyst. The lignite residue catalyst is wide in source, low in cost and easy to obtain, mild in reaction condition, wide in substrate application range, good in yield and capable of achieving gram-scale reaction and has industrial application prospects. Meanwhile, waste resources can be recycled, the problem that the lignite residues are difficult to treat is solved, and the purposes of environmental protection and green chemistry are met.

This invention provides a catalyst component for olefin polymerization, its preparation method, the catalyst itself, and its applications. The catalyst component is prepared by reacting raw materials including a magnesium complex, a precipitation aid, a titanium-containing compound, an acetate compound, an organic alcohol compound, an organoaluminum compound (N), and an electron donor compound. The catalyst provided by this invention is used in olefin polymerization to prepare high / ultra-high molecular weight polyolefins. The prepared polymers exhibit controllable molecular weight, narrow molecular weight distribution, low hexane extract content, low content of large particles and fine powders, low branching degree, high sphericity, and good low entanglement properties.