41results about How to "Rich synthetic methods" patented technology

The present invention provides a kind of preparation method of oxamide, and this preparation method comprises the following steps: with CO, O 2 and amine compounds as raw materials, under the action of catalyst 1, oxidative carbonylation to prepare intermediate oxamide derivatives, and then under the action of catalyst 2, aminolysis of oxamide derivatives to prepare oxamide. The invention uses a brand-new method to co-produce oxamide and oxamide derivatives, which solves the problems of toxic oxalate synthesis raw materials and low catalyst efficiency in the original technology of synthesizing oxamide through aminolysis of oxalate. In addition, the process for synthesizing oxamide derivatives has good substrate applicability and can be used in fields such as medicine, pesticides, synthetic ligands, and food additives.

The invention discloses a method for preparing anthraquinone by an anthracene oxidation method using a starch modified catalyst, using γ-Al 2 O 3 As the carrier, Fe and Zr oxides are the active components, and Fe‑γ‑Al is prepared by equal volume impregnation method. 2 O 3 , Zr‑γ‑Al 2 O 3 Single supported catalyst and Fe‑Zr / γ‑Al 2 O 3 Dual-loaded catalyst, modified carrier according to the mass ratio of starch: carrier = 1:100, while using starch modified carrier to prepare a series of modified catalysts. Ultra-high performance liquid chromatography was used to analyze the product, the catalytic performance of the catalyst in the reaction of anthracene oxidation to synthesize anthraquinone was analyzed, and XRD and other means were used to characterize the catalyst.

The invention discloses a preparation method of a benzodithiocyclopentadiene derivative. Benzodithiocyclopentadiene is synthesized by reacting S8 as a sulfur source with 2-bromothioamide. The synthesis method provides a cheap, easily available and environment-friendly synthesis method for synthesis of benzodithiocyclopentadiene compounds, adopts a green and environment-friendly reaction system, obtains products easy to be separated and purified, is suitable for synthesizing various highly functionalized benzodithiocyclopentadiene compounds, is particularly suitable for large-scale industrial production, and can prepare high-purity benzodithiocyclopentadiene compounds at high efficiency and high yield.

The invention discloses C 3 N 4 The synthesis method, product and application of quantum dot room temperature phosphorescent material. The synthesis method is to use urea or other urea-like small molecules as raw materials, and carry out high-temperature solid-phase reaction in a high-pressure reactor. The obtained product is gray-white powder with solid-phase fluorescence. At the same time, it can continuously emit blue-green phosphorescence visible to the naked eye for 3-6s at room temperature; its preparation method is simple, does not contain harmful metals, and is a new type of room temperature phosphorescent material; it has potential in 3D printing, anti-counterfeiting, decoration, imaging and other fields application value.

The invention discloses a synthesis method of C-3 alkyl-substituted coumarin derivatives, which combines the coumarin derivatives represented by the formula (I), the coumarin derivatives represented by the formula (II) N ‑alkanoyloxyphthalimide compound, photocatalyst and protonic acid are dissolved in an organic solvent, and reacted at 20‑60°C for 3‑36 h under visible light irradiation. After the reaction, the reaction system After post-processing, the C-3 alkyl-substituted coumarin derivative target product shown in formula (III) is obtained; the reaction formula is as follows: In formula (I) and formula (III), the substituent R 1 Is H, methyl, methoxy, fluorine, chlorine or bromine; in formula (II) and formula (III), substituent R 2 It is C1-C8 linear alkyl or cycloalkyl. The invention realizes the C-3 alkylation of coumarin by using light as the reaction energy, makes the reaction safer, greener, and lower in cost, expands the scope of application of the substrate of the reaction, and enriches the coumarins substituted by C-3 Compound synthesis method.

The present application discloses a table edge surround material, the raw materials of which include by weight: 80-120 parts of thermoplastic polyurethane elastomer, 40-50 parts of polyvinyl chloride, 20-60 parts of polytetrafluoroethylene, 5-5 parts of potassium sodium silicate 15 parts, 4-8 parts of blue alum, 3-9 parts of short polyester fiber, 4-8 parts of long glass fiber, 2-8 parts of nano calcium carbonate, 10-20 parts of wear-resistant enhancer, 4-8 parts of chain extender 15-25 parts of modified reinforcing agent A, 16-32 parts of modified reinforcing agent B. The present invention also proposes a preparation method of the above-mentioned table edge surrounding material. The table edge surround material prepared by the invention has excellent wear resistance, strength and toughness.

A method for preparing a macro-monomer synthesized polycarboxylate water reducer through alcoholysis of alkenyl-acyl chloride belongs to the field of water reducers. The method comprises the following steps: firstly polymerizing a cationic chain, and then reacting with the alkenyl-acyl chloride, thus obtaining a macro-monomer; then carrying out copolymerization on the macro-monomer and a carboxylic acid micro-monomer, i.e., polymerizing under an oxidization-reduction initiating system formed by high-valence cerate and alcohols by taking an unsaturated cationic quaternary ammonium salt monomer as a reactant, thus obtaining a terminal hydroxyl cationic long chain; then respectively enabling the terminal hydroxyl cationic long chain and polyethylene glycol monomothyl ether to react with the alkenyl-acyl chloride respectively, thus preparing macro-monomers with different structures; then carrying out free radical polymerization on the macro-monomers and unsaturated carboxylic acid micro-monomers, thus obtaining the macro-monomer composite polycarboxylate water reducer. According to the method disclosed by the invention, the macro-monomers with different structures and functions are successfully synthesized through ways of polymerizing the cationic chain and respectively reacting with the alkenyl-acyl chloride by combining polyether, and a novel comb-structure polycarboxylate water reducer which takes a polycarboxyl acid as a main chain and the cationic long chain and the polyether as polybasic side chains can be finally obtained. A reaction technology is simple and easy, and multiple excellent effects of retaining slump through reducing water, resisting clay, and the like are realized.

The invention relates to a method for preparing octanohydroxamic acid from hydroxylamine sulfate and calcium oxide and belongs to the field of cosmetic raw material synthesis. The method is characterized by comprising the following steps of adding quicklime into a hydroxylamine sulfate solution at a temperature of less than or equal to 10 DEG C, filtering away precipitated calcium sulfate, sequentially adding the quicklime and methyl caprylate, performing hydroxyl oximation reaction at 30-60 DEG C, recovering a solvent after 2-6h, cooling to 0 DEG C, adding 10% hydrochloric acid at the low temperature, regulating a pH (potential of hydrogen) value to 3-4, precipitating octanohydroxamic acid solid, performing filtering, water washing and dryness to form octanohydroxamic acid. The method is mild in reaction condition and high in yield; a product is good in purity; the cheap and readily accessible quicklime is used as alkali, so that the raw material cost is greatly lowered; and the method is applicable to industrial production.