39 results about "Methyl propiolate" patented technology

The present invention discloses a medical anti-adhesion hydrogel dressing, which comprises a hydrogel, wherein a methyl propiolate monomer, double or multi-functional group terminated-polyethylene glycol having unsaturated double bond, water and an initiator are further subjected to thermal initiation or photo initiation or radiation initiation polymerization so as to obtain the hydrogel, and the hydrogel has a micron porous structure. According to the present invention, the prepared hydrogel dressing has characteristics of no adhesion to wound, good water absorption and excellent mechanical property, and has a space micro-structure capable of loading drugs or growth factors so as to load various drugs or growth factors, achieve the functionalization treatment of the dressing, and achieve antibacterial, wound healing promoting and other functions.

The invention discloses a synthesis method of indenofluorene derivatives, isotruxene and mono-substituted isotruxene derivatives. The synthesis method of indenofluorene derivatives is characterized in that ester-group-containing compounds are formed through Diels-Alder reaction of methyl propiolate and indenocyclopentadienone, ethyl substituted indenofluorene derivatives are formed through hydrolysis, acid catalytic ring closing, carbonyl reduction and introduction of ethyl onto methylene, diketone compounds produced after ring closing react with lithium salt of 4, 4'-di-tert-butyl-2-brominated biphenyl, and then acidification and ring closing are conducted to obtain indenofluorene derivatives with spirofluorene. The synthesis method of isotruxene is characterized in that 1, 4-diphenyl-2, 3-di (carbalkoxy) fluorenone products are formed through the Diels-Alder reaction of indenocyclopentadienone and dimethyl acetylenedicarboxylate, isotruxene ketone is obtained through hydrolysis and acid catalytic ring closing and finally isotruxene is obtained; dibenzyl alcohol products are formed through the Diels-Alder reaction of 1, 4-butynediol and indenocyclopentadienone, and isotruxene is obtained through acetone protection, carbonyl reduction, acetone removal and polyphosphoric acid (PPA) ring closing; and oriented oxy substituted products, i.e. isotruxene ketone which is derived from isotruxene with methylene at a No.5 position being substituted, and corresponding diethyl substituted products are additionally obtained. The indenofluorene derivatives, the isotruxene and the mono-substituted isotruxene derivatives disclosed by the invention can be used in the field of organic electroluminescence and organic micro-molecule solar cells.

The invention discloses an annular multilayer sleeve membrane reactor. The reactor adopts an annular three-layer sleeve structure as the main body, and comprises an inner membrane sleeve, a middle membrane sleeve and an outer sleeve which are coaxially arranged from the inner part to the outer part, wherein exteriors of the inner membrane sleeve and the middle membrane sleeve are fixed and supported through supporting networks; a water vapor outlet is formed in the inner membrane sleeve; a material inlet and a material outlet are formed in the middle membrane sleeve; an air inlet is formed in the outer sleeve; a mixing component is arranged in the cavity of the middle membrane sleeve; a separating network is mounted in at the outlet of the middle membrane sleeve; a one-way valve is mounted between the material inlet and the material outlet. Methyl propiolate produced by the reactor can realize continuous removal of produced water during esterification reaction of the methyl propiolate, and improve the reaction conversion rate and selectivity, and meanwhile reduces the generationproduces of polymer and ether impurities.

The invention discloses a high-adhesion aqueous thermosetting acrylic resin, a preparation method and applications thereof. According to the present invention, a reaction monomer is modified with a silane coupling agent, a polymerization reaction is performed in an alcohol ether type solvent medium under the effect of an initiator, and neutralization salification is performed with an organic amine to prepare the acrylic resin, wherein the reaction monomer comprises, by mass, 0-30% of methyl propiolate, 0-30% of acrylic acid ester, 5-18% of (methyl) hydroxyalkyl acrylate, 1-10% of unsaturated carboxylic acid, and 0-20% of a vinyl aromatic compound. According to the present invention, the prepared acrylic resin coating material has excellent adhesion to the aluminum material, the paint film has characteristics of high luster, good fullness and high strength, and the excellent protection performance and the excellent decorative effect can be provided for the high-grade aluminum material.

The invention provides an improved synthesis process for synthesizing rufinamide. The process comprises the following steps of a, reacting 2, 6-difluorobenzyl halide with azide and tetrabutylammonium chloride to obtain 2-(azide methyl)-1,3-difluorobenzene; b, reacting 2-(azide methyl)-1, 3-difluorobenzene with methyl propiolate under the catalyzing of nano-cuprous oxide (Cu2O) to obtain 1-(2,6-difluorobenzyl)-1H-1,2,3-triazole-4-methyl formate; and c, reacting 1-(2,6-difluorobenzyl)-1H-1,2,3-triazole-4-methyl formate with ammonium hydroxide to obtain rufinamide. The process has the advantages of short reaction time and high catalytic efficiency, and is simple and safe to operate.

The invention relates to a synthetic method for (S)-Virol A from a polyacetylene water hemlock extract. The synthetic method for (S)-Virol A from the polyacetylene water hemlock extract is an asymmetric synthetic method, and comprises the following steps: firstly, under catalysis of a chiral ligand, methyl propiolate and dimethyl zinc are reacted to prepare an alkynyl zinc reagent, hexanal is subjected to asymmetric addition reaction to obtain a chiral intermediate (S)-4- hydroxy-2-alkyne methyl nonanoate, through ester group removal to obtain acetylene, the processed intermediate is coupled with vinylidene chloride, then selective reduction is carried out to obtain a product, and finally the product is coupled with 4,6-diyne-1-heptanol to obtain the (S)-Virol A. The flow of the method is simple and easy to realize, and the method is environmental-friendly.

The invention discloses alkynyl-containing conjugated polymers and a synthetic method thereof, and belongs to the field of macromolecular compound synthesis. The prior triple bond-containing conjugated polymers and synthesis have the problems of low conversion rate of a monomer, poor dissolution of products and the like. The polymers are shown as a general formula (I). The monomer and an initiator are added into a reactor in a molar ratio of 2-100:1, and reacts at a temperature of between 20 DEG C below zero and 70 DEG C for 1 to 24 hours; and the products are dissolved by hydrochloric acid, separated, and dried in vacuum to obtain the alkynyl-containing conjugated polymers, wherein the monomer is methyl acetylenecarboxylate, ethyl acetylenecarboxylate or butyl acetylenecarboxylate; and the initiator is solid sodium hydride, potassium hydride, sodium methoxide, sodium alcoholate or organolithium. The alkynyl-containing conjugated polymers and the method have the advantages of wide reaction temperature range, high conversion rate of the monomer and the like. In the formula, R is -CH3, -CH2CH3, or -CH2CH2CH2CH3, and n is between 10 and 500.

The invention discloses an environment-friendly preparation method of propiolic acid derivatives. The preparation method comprises the following steps: (1) with 2,3-dibromosuccinic acid as a raw material, generating a butynedioic acid salt under alkaline conditions; (2) under an acidic condition, carrying out high-temperature decarboxylation to obtain propiolic acid; and (3) adding corresponding methanol or ethanol into propiolic acid in an extraction solvent, and preparing high-yield propiolate under acidic catalytic conditions under the condition that trimethyl orthoformate or triethyl orthoformate participates in dehydration. In the invention, the propiolic acid preparation method is friendly to environment and high in safety coefficient; and the method provided by the invention can beused for preparing methyl propiolate and ethyl propiolate, and has the advantages of small alcohol consumption, thorough reaction, high yield and easiness in separation.

The present invention discloses an anticorrosion waterproof floor heating pipe, which comprises, by weight, 100 parts of a polyethylene resin, 16-18 parts of nylon, 12-14 parts of sawdust powder, 10-12 parts of peat, 6-8 parts of dioctyl phthalate, 10-20 parts of oil shale, 15-25 parts of methyl propiolate, 7-9 parts of active calcium carbonate, 3-5 parts of a waterproofing agent, 2-4 parts of an anticorrosion agent, 3-4 parts of stearic acid, 8-10 parts of aluminium hydroxide, and 0.6-0.8 part of a silane coupling agent. According to the present invention, the obtained plastic pipe plastic uses the sawdust powder and the peat as the main raw materials so as to provide advantages of cracking resistance, water leakage resistance, strong acid resistance, strong alkali resistance, strong impact resistance, good adhesion, and good thermal insulation; and by adding the waterproofing agent and the anticorrosion agent, the obtained material has advantages of excellent water resistance, excellent wear resistance, good fluidity, good alkali corrosion resistance, low cost and good stability, and is the rapid molding plastic raw material.

The invention relates to a perfluoroalkyl indolizine derivative and a synthesis method thereof. A structural formula of the perfluoroalkyl indolizine derivative is as shown in the specification, wherein R1 refers to H, CH3 and CO2Me; R2 refers to hydrogen, chlorine, methoxyl, nitryl or methyl; RF refers to C1-C3 perfluoroalkyl. Easily acquirable pyridine derivatives, w-bromoacetophenone derivatives and perfluoroalkyl methyl propiolate mature in synthesis technique are adopted as raw materials for one-pot synthesis of the perfluoroalkyl indolizine derivative step by step. The perfluoroalkyl methyl propiolate used as the raw materials is subjected to Michael addition under certain conditions to obtain the perfluoroalkyl indolizine derivative, operations are greatly simplified, and high atom economy and environment friendliness are realized; due to adoption of acetonitrile as a solvent, low environment pollution is realized; high regioselectivity and high yield are achieved. Therefore, the synthesis method is a novel effective method for synthesis of the perfluoroalkyl indolizine derivative.

The invention provides a preparation method of 2-(4-methoxyphenyl)-3-hydroxy-2, 3-dihydro-1, 5-benzothiazepine ketone. The preparation method comprises the following steps: taking o-aminothiophenol and methyl propiolate as raw materials to synthesize an intermediate product 1, carrying out selective epoxidation to obtain an intermediate product 2, reacting the intermediate product 2 with 4-methoxyphenyl anions, carrying out Mitsunobu reaction to obtain an intermediate product 3, and hydrolyzing to obtain the product. In the cyclization process of the intermediate product 1, the tension of Z-structure olefin is small so that the yield is high, subsequent epoxidation is an asymmetric epoxidation reaction, the obtained intermediate product 2 is high in optical purity and high in yield, the intermediate product 2 and 4-methoxyphenyl anions are subjected to SN2 reaction, configuration inversion is carried out in an ortho-position, and the product is obtained. The whole reaction process doesnot need to be split, the total yield of the route is high, and the method is economical.