93 results about "Allyl alcohol" patented technology

The invention relates to the field of chemical synthesis, in particular to a production process of allyl diethylene glycol dicarbonate, which comprises the following steps: by taking allyl alcohol and dimethyl carbonate as raw materials, carrying out transesterification under the action of a core-shell catalyst to generate dipropylene carbonate; carrying out solid-liquid separation, carrying out reduced pressure distillation to recover methanol and dimethyl carbonate, and then carrying out second-step ester exchange reaction with diethylene glycol under the action of the same catalyst to generate allyl diethylene glycol dicarbonate; and finally, performing multi-stage reduced pressure distillation purification to obtain a high-purity product. According to the core-shell type catalyst, an MCM-41 molecular sieve is used as a carrier, an inner core is formed after amino modification and zirconium ion coordination, then an interface layer and a phenyl modified silicon dioxide shell are used for packaging, and the core-shell type catalyst has high activity, high selectivity and excellent structural stability. The method has the advantages of mild process conditions, recyclable catalyst, high product yield and excellent purity, and is suitable for industrial production.

Acrolein is produced by selectively oxidizing allyl alcohol over a first mixed metal oxide catalyst in the presence of oxygen in the vapor phase. The first mixed metal oxide catalyst comprises oxides of molybdenum and bismuth. Acrylic acid is produced by selectively oxidizing the acrolein over a second mixed metal oxide catalyst in the presence of oxygen in the vapor phase. The second mixed metal oxide catalyst has a different composition from the first mixed metal oxide catalyst.

The invention relates to a preparation technology of a multifunctional plastic clothes hanger through cooperation of degradable color master batches and nitrogen filling injection molding, and belongs to the technical field of plastic products. Adding the polylactic acid, the styrene-acrylonitrile copolymer, the modified stone powder, the degradable color master batch and the compound additive into a horizontal helical ribbon mixer, stirring and drying to obtain a mixture; the dried mixture is added into an injection molding machine to be melted and plasticized, a screw pushes melt to be injected into a mold, high-pressure nitrogen is injected into the melt, and the melt is pushed to completely fill a cavity; the plastic clothes hanger is obtained through pressure maintaining, cooling and demolding; the compound additive is prepared from allyl alcohol polyoxyethylene ether, 2-octenyl succinic anhydride, 14-mercaptotetradecanoic acid, anhydrous tetrahydrofuran, 2-hydroxy-4 '-(2-hydroxyethoxy)-2-methyl propiophenone and triethylamine. The preparation method comprises the following steps: preparing the compound additive; the degradable material is adopted, the biodegradation rate is high, the mechanical property is stable, the coloring effect is good, fading is not prone to occurring, and the service life is long.

The invention belongs to an allyl alcohol copolymer, and particularly relates to a method for preparing an allyl alcohol copolymer based on an intermediate conversion method, the allyl alcohol copolymer and application of the allyl alcohol copolymer. The method comprises the following steps: reacting allyl alcohol with a hydroxyl conversion reagent to convert hydroxyl into other groups so as to obtain a new allyl monomer; carrying out copolymerization on the monomer and other comonomers under the action of an initiator to obtain a copolymer; the hydroxyl is recovered by removing a conversion group, so that efficient and green preparation of the allyl alcohol copolymer is realized. The hydroxyl is converted into other groups, so that the reactivity rate of copolymerized monomers is closer during copolymerization, and the regulation and control of molecular weight and molecular composition are easy to realize; the high-temperature and high-pressure reaction conditions are avoided, and the safety risk caused by the fact that the highly toxic allyl alcohol raw material is greatly excessive is avoided; the polymerization reaction can be performed under normal pressure, the reaction condition is mild, and the equipment investment and maintenance cost are reduced; and the amount of residual allyl alcohol in the product is greatly reduced.

The invention relates to a preparation method of a polysiloxane defoaming composition. The polysiloxane defoaming composition is prepared from silicone grease, a polyether-polysiloxane copolymer, a surfactant and polyether. The silicone grease is prepared from the following raw materials: branched polysiloxane, hydrogen-containing polysiloxane, silicon dioxide, a TQ polymer, an addition catalyst and an inhibitor; the polyether-polysiloxane copolymer is prepared from hydrogen-containing silicon resin with a spatial structure, diallyl alcohol polyether and allyl polyether through a reaction. The polysiloxane defoaming agent composition obtained by the invention has the characteristics of excellent foam control and easiness in cleaning.

The present invention relates to the field of organic synthesis, and more particularly to a method for the oxidation of allylic alcohols to α,β-unsaturated carbonyl compounds in the presence of a zirconium catalyst and a hydrogen acceptor.

The application discloses an indoor moisture-proof and water-resistant gypsum board and a preparation method thereof, and belongs to the technical field of gypsum board preparation. The preparation method of the indoor moisture-proof and water-resistant gypsum board comprises the following steps: S1, uniformly mixing building gypsum, modified fluorite gypsum, deionized water, a polyester adhesive, a composite water reducing agent, blast furnace slag powder and the like to obtain a gypsum slurry; S2, paving the gypsum slurry on a first layer of cover paper, paving a second layer of cover paper on the gypsum slurry, and performing compaction, final setting, drying and solidification to obtain the indoor moisture-proof and water-resistant gypsum board. The composite water reducing agent is obtained by the reaction of ethyl vinyl ether, trichlorofluoroethylene and allyltrimethoxysilane. The polyester adhesive is obtained by the reaction of allyl alcohol, phthalic anhydride and triallyl cyanurate. The prepared gypsum board not only has good moisture-proof and water-resistant performance, but also has good mechanical properties, thereby prolonging the service life and ensuring the quality of the gypsum board to a certain extent.

The present application relates to the technical field of organic synthesis, and particularly relates to a method for preparing (+)-crispine A by means of biological enzyme resolution. First, 6,7-dimethoxy-3,4-dihydroisoquinoline-2-oxide is subjected to 1,3-dipolar cycloaddition with allyl alcohol to obtain a first compound; then the first compound is added into a sulfonylation reagent and zinc powder to obtain a racemate second compound through a three-step continuous series reaction of primary alcohol sulfonylation, nitrogen-oxygen bond cleavage and ring formation; then the second compound is mixed with vinyl acetate and biological enzyme, and chiral resolution is carried out under the action of the biological enzyme to obtain a third compound with right-handed optical rotation and a fourth compound with left-handed optical rotation; finally, the third compound is mixed with an alkaline reagent and a sulfonylation reagent, and then secondary alcohol sulfonylation is carried out to obtain a fifth compound with right-handed optical rotation; the fifth compound is mixed with a deoxidizing reagent to carry out deoxidation reaction, and (+)-crispine A is prepared. The method is simple, green and environmentally friendly, and can be produced in large quantities.

The present invention relates to the technical field of organic synthesis. Disclosed is a method for synthesizing allyl alcohol. The synthesis method comprises the following steps: adding a water-soluble acid-resistant high-boiling-point organic solvent to an aqueous allyl acetate solution and stirring the mixture to form a homogeneous solution; then heating the homogeneous solution, and performing a hydrolysis reaction under the action of a solid acid catalyst to obtain a mixture solution containing allyl alcohol; and then distilling the mixture solution to separate out the high-boiling-point organic solvent to obtain a crude allyl alcohol product. The synthesis method provided by the present invention can significantly improve the single-pass hydrolysis conversion rate of allyl acetate at low costs and achieve efficient and continuous industrial production of allyl alcohol. Moreover, the method can realize the separation of allyl alcohol from the high-boiling-point organic solvent simply by means of a simple distillation separation process. The separated organic solvent has high purity and light color and can be reused. The method has no waste liquid and waste residue generated.

The invention provides a method for preparing allyl alcohol through epoxypropane isomerization, and relates to the technical field of chemical synthesis. According to the method, propylene oxide is subjected to an isomerization reaction in the presence of a polymerization inhibitor to prepare allyl alcohol; wherein the polymerization inhibitor is a phenol polymerization inhibitor and / or a quinone polymerization inhibitor. The technical scheme of the invention can effectively reduce the deactivation rate of the catalyst and prolong the service life of the catalyst. The method for preparing allyl alcohol through epoxypropane isomerization is high in production efficiency and low in production cost, and has important industrial application value.

The invention relates to the technical field of preparation of allyl alcohol polyether, in particular to a preparation method of allyl alcohol random polyether. According to the method, allyl alcohol is used as an initiator and is subjected to a polymerization reaction with ethylene oxide and epoxypropane in the presence of a non-metal organic catalyst. The method comprises the following steps: firstly, activating a mixed solution of part of ethylene oxide and propylene oxide, an initiator and a catalyst, then continuously dropwise adding the residual mixed solution into a sealed reaction system for growth polymerization, and finally recovering the catalyst through reduced pressure distillation to directly obtain a high-purity product. The method is simple in process route, avoids complex post-treatment steps such as neutralization and adsorption required by using a noble metal or sodium alcoholate catalyst, is high in catalyst recovery rate, extremely low in potassium and sodium ion content (less than or equal to 3ppm) in the product, and capable of accurately regulating and controlling the molecular weight in a range of 1400-3100, remarkably reduces the production cost, and is suitable for industrial production.

The invention discloses a preparation method of a low-pore-number composite lining, and belongs to the technical field of textiles. The preparation method of the low-hole-number composite lining comprises the following steps: (1) weaving polyester yarns into gray fabric; (2) shaping and preshrinking the gray fabric; (3) dyeing the set and pre-shrunk gray fabric; (4) shaping and finishing the dyed gray fabric to obtain a composite lining; wherein the dye for dyeing is obtained by reacting N-amino-4-N, N-dimethyl-1, 8-naphthalimide with ferrocene dicarboxaldehyde, and the dye for dyeing is obtained by reacting N-amino-4-N, N-dimethyl-1, 8-naphthalimide with ferrocene The setting agent for setting and finishing contains a hydrophilic softening agent, the hydrophilic softening agent is obtained by mixing polyether phenyl silicone oil with a compound emulsifier and deionized water, and the polyether phenyl silicone oil is obtained by reacting side chain hydrogen-containing silicone oil, allyl alcohol polyoxyalkyl ether, vinyltriethoxysilane and 1-(4-vinyl-phenyl)-ethanone; the prepared low-hole-number composite lining is good in hydrophilicity, color fastness and softness.

An organic silicon resin toughening agent, a single-component high-strength epoxy structural adhesive, and the preparation method thereof. The organic silicon resin toughening agent is prepared by reacting epoxy modified hydrogen-containing silicone oil with vinyl six-membered cyclic oligomeric silsesquioxane; The epoxy modified hydrogen-containing silicone oil is prepared by reacting allyl alcohol glycidyl ether with dihydrogen-terminated hydrogen-containing silicone oil. The organic silicon resin toughening agent with a circular network structure unit synthesized by the present disclosure has better high and low temperature resistance compared to toughening agents such as nitrile rubber and core-shell structure rubber. While improving the toughness of single-component high-strength epoxy structural adhesive, it can significantly enhance the high and low temperature resistance of single-component high-strength epoxy structural adhesive.

The invention discloses a preparation method of a silicone oil modified polyether defoaming agent, which is characterized in that alkynol (EO / PO type) block polyether and allyl alcohol (PO / EO type) block polyether are subjected to addition reaction under the action of a catalyst to generate the silicone oil modified polyether defoaming agent. The silicone oil modified polyether defoaming agent disclosed by the invention has the characteristics of high foam breaking speed and long foam inhibition period; the defoaming agent provided by the invention has the advantages of high temperature resistance, excellent chemical stability and excellent compatibility, and compared with a traditional polyether defoaming agent, the defoaming agent provided by the invention can achieve a better defoaming effect under the condition of a relatively low addition amount.

The invention provides a high-stability defoaming agent and a preparation method thereof, and belongs to the technical field of defoaming agents. The defoaming agent is prepared from 40 to 60 parts of polyether modified organic silicon, 130 to 170 parts of branched polyether ester, 270 to 330 parts of silicon factice, 14 to 18 parts of other auxiliary agents and 430 to 530 parts of water; the polyether modified organic silicon is obtained by carrying out hydrosilylation reaction on allyl polyoxyalkyl ether and hydrogen-containing silicone oil under the catalysis of chloroplatinic acid; the allyl polyoxyalkyl ether is prepared by carrying out polymerization reaction on allyl alcohol and alkylene oxide; the branched polyether ester is obtained by carrying out esterification reaction on branched polyoxyalkyl ether and fatty acid under the action of an acid catalyst; and the branched polyoxyalkyl ether is prepared by carrying out polymerization reaction on polyfunctional polyol and alkylene oxide. The defoaming agent disclosed by the invention is stable in storage at a high temperature, can maintain a good defoaming speed in a strong acid and alkali environment, and can maintain relatively strong foam inhibition activity.

The invention discloses a polyether type defoaming agent as well as a preparation method and application thereof, and the polyether type defoaming agent is obtained by carrying out second polymerization on 35%-65% of allyl polyoxyethylene ether, 20%-65% of allyl polyoxypropylene ether and 0%-15% of allyl polyoxybutylene ether; the allyl polyoxyethylene ether is formed by first polymerization of allyl alcohol and ethylene oxide, the allyl polyoxypropylene ether is formed by first polymerization of allyl alcohol and epoxypropane, and the allyl polyoxybutylene ether is formed by first polymerization of allyl alcohol and epoxybutane. When the polyether type defoaming agent is used in papermaking white water, the foam inhibition and defoaming properties are obviously improved, and the quality of paper products is not influenced.

The application discloses a Schiff base catalyst, a preparation method thereof and a preparation method of allyl glycidyl ether. The Schiff base catalyst comprises a Schiff base ligand and a central metal ion, wherein the Schiff base ligand is a condensate of ethylenediamine, one molecule of 3,5-di-tert-butyl salicylaldehyde and one molecule of 5-tert-butyl salicylaldehyde, and the central metal ion is selected from any one of Sn, Al and Fe. The Schiff base catalyst can efficiently catalyze the ring opening of allyl alcohol and epichlorohydrin, and the reaction period can be compressed to 3 hours. Meanwhile, the asymmetric structure of the Schiff base complex can effectively control the ring opening position of epichlorohydrin, improve the ring opening selectivity, and the methylene ring opening selectivity can be up to 99%.

The invention discloses an indoor moisture-proof and water-resistant gypsum board and a preparation method thereof, and belongs to the technical field of gypsum board preparation. The preparation method of the indoor moisture-proof and water-resistant gypsum board comprises the following steps: S1, uniformly mixing building gypsum, modified fluorgypsum, deionized water, a polyester adhesive, a composite water reducing agent, blast furnace slag powder and the like to obtain gypsum slurry; s2, the gypsum slurry is flatly laid on the first layer of surface protection paper, the second layer of surface protection paper is flatly laid on the gypsum slurry, compaction, final setting and drying curing are conducted, and the indoor damp-proof and water-resistant gypsum board is prepared; wherein the composite water reducing agent is obtained by carrying out a reaction on ethyl vinyl ether, trichlorofluoroethylene and allyl trimethoxy silane; the polyester adhesive is obtained by reaction of allyl alcohol, phthalic anhydride and triallyl cyanurate; the prepared gypsum board not only has good moisture-proof and water-resistant performance, but also has good mechanical performance, the service life of the gypsum board is prolonged to a certain extent, and meanwhile the quality of the gypsum board is guaranteed.

The application provides a method for preparing normal aldehyde by one-step method, in which a raw material non-conjugated allyl alcohol is contacted with a catalyst under the condition of 0-2.0 bar in a hydrogen atmosphere containing carbon monoxide, and a normal aldehyde is generated by reaction; wherein the catalyst is a supported catalyst, including an active component main metal and an active assistant; the active component main metal includes at least one of rhodium, ruthenium and platinum elements, and the active assistant includes at least one of sulfur, selenium, tellurium, phosphorus, arsenic, antimony, bismuth, tin, cadmium, cerium and praseodymium elements. By controlling the synergistic effect of the reaction condition and the catalyst component, the double bond migration and saturated hydrogenation in the raw material are jointly regulated, the raw material conversion rate and the selectivity of the normal aldehyde are improved, and the generation of by-products is significantly reduced. The process flow of the application is simple and efficient, and is beneficial to large-scale production and application.

This invention provides a phosphorus-silicon synergistic flame-retardant coolant for immersion liquid cooling and its preparation method, belonging to the field of thermal safety technology for energy storage batteries. The preparation method of the phosphorus-silicon synergistic flame-retardant coolant for immersion liquid cooling includes adding diphenyl phosphate, allyl alcohol, a condensing agent, and an esterification catalyst to a reaction vessel under an inert atmosphere to carry out an esterification reaction, obtaining the intermediate allyl diphenyl phosphate; subsequently, adding 1,1,3,3-tetramethyldisiloxane and a platinum catalyst to the reaction system to carry out a hydrosilylation reaction; after the reaction, purification treatment is performed to obtain a siloxane-bridged phosphate; the obtained siloxane-bridged phosphate is added to a base mineral insulating oil, and a high-efficiency antioxidant is added, followed by uniform mixing to obtain the phosphorus-silicon synergistic flame-retardant coolant. This method can solve the problems of insufficient oxidation stability, easy increase in acid value, and difficulty in simultaneously achieving flame-retardant efficiency and long-term stability in existing coolants under long-term high-temperature operation.

The invention belongs to the technical field of building material admixtures and relates to a water-reducing hydrated calcium silicate composite early strength agent as well as a preparation method and application thereof. Wherein the polycarboxylic acid water reducer comprises the following components: acrylic acid, methallyl alcohol polyoxyethylene ether, mercaptoacetic acid and 2-hydroxy-4 '-(2-hydroxyethoxy)-2-methyl propiophenone, and the molar ratio of the acrylic acid to the methallyl alcohol polyoxyethylene ether is (5-7): 1; the mercaptoacetic acid accounts for 0.8%-1.6% of the total mole number of the acrylic acid, and the 2-hydroxy-4 '-(2-hydroxyethoxy)-2-methyl propiophenone accounts for 0.84%-0.85% of the total mole number of the methallyl alcohol polyoxyethylene ether. According to the invention, the molecular structure of PCE is accurately designed, and PCE is used as a key regulating agent to actively regulate the nucleation process of C-S-H and the steric hindrance effect among particles, so that the aggregation tendency of the particles is inhibited, the small particle size of the product is ensured, and the long-term dispersion stability is given to the product.

This invention discloses a flocculant for treating fracturing flowback fluid, relating to the field of oilfield wastewater treatment technology. The flocculant comprises modified starch and organic acid. The preparation method of the modified starch includes the following steps: reacting allyl alcohol glycidyl ether with 1,4,7-trimethyldiethylenetriamine; after the reaction, separating and purifying to obtain an intermediate product; taking the intermediate product and dissolving it, adding an alkyl halide to perform a quaternization reaction; after the reaction, separating and purifying to obtain a cationic monomer; taking pregelatinized starch and dispersing it in water, then adding the cationic monomer, acrylamide, and an initiator to perform free radical polymerization; after the reaction, drying to obtain the final product. The flocculant for treating fracturing flowback fluid provided by this invention not only has strong salt resistance, making it suitable for the high-salt environment of fracturing flowback fluid, but also effectively removes oil, turbidity, color, and suspended solids from the fracturing flowback fluid, and has a strong COD removal capacity.

The invention discloses a temperature-resistant gel temporary plugging agent and a preparation method thereof, and relates to the technical field of oilfield chemistry. The preparation method comprises the following steps: taking and dissolving an acrylamide monomer, an unsaturated sulfonate monomer and a first monomer in parts by weight, then adding tetrapolyglycine, an initiator and a degradable cross-linking agent, carrying out a reaction, and after the reaction is finished, crushing, drying and granulating the obtained product, thereby obtaining the product, the first monomer is prepared from N, N-dihydroxyethyl glycine and allyl alcohol through an esterification reaction. The temperature-resistant gel temporary plugging agent prepared by the invention has better temperature resistance, can tolerate the temperature of 120 DEG C, and has higher expansion rate, degradability and strength under the temperature condition.

The application belongs to the technical field of polyether preparation, and discloses a supported catalyst and a method for preparing allyl alcohol block polyether by using the same. The supported catalyst comprises silica gel and zinc and nickel supported on the silica gel; the mass ratio of zinc to nickel is (2-8):(2-8). The supported catalyst provided by the application can be used to prepare allyl alcohol block polyether with high double bond retention rate and low allyl content; the cost of the catalyst is low, the preparation method is simple, the stability is high, and the catalyst is convenient to recycle and use. The preparation method for the allyl alcohol block polyether provided by the application is simple in process, does not need complicated post-treatment, and is low in process cost.

The application discloses a kind of admixtures for capacitor concrete and preparation method thereof, belong to concrete admixture technical field.Admixtures for capacitor concrete includes the following raw materials: electrically conductive polycarboxylate superplasticizer, composite defoamer and water;Electrically conductive polycarboxylate superplasticizer includes the following raw materials: polyhydroxy polyaniline, methyl allyl alcohol polyoxyethylene ether, unsaturated carboxylic acid monomer, 2-acrylamide-2-methylpropane sulfonic acid, chain transfer agent, reducing agent and oxidizing agent, crosslinking agent and water;Composite defoamer includes the following raw materials: glycerol polyether, tributyl phosphate and water.The application also discloses the preparation method of the above-mentioned admixtures for capacitor concrete.The admixtures for capacitor concrete of the application can effectively disperse electrically conductive materials such as carbon black by means of electrostatic adsorption and steric hindrance effect of electrically conductive polycarboxylate superplasticizer, avoid the agglomeration of electrically conductive materials, and further promote the enhancement of the electrically conductive performance of capacitor concrete during the preparation of capacitor concrete.

The application provides a synthesis method of 2-(3-hydroxypropyl)-cyclododecanone, which is as follows: under the action of an alkali catalyst, cyclododecanone and epichlorohydrin are reacted to obtain 2-epoxypropylcyclododecanone, and then hydrogen reduction is carried out to obtain 2-(3-hydroxypropyl)-cyclododecanone. The synthesis route is novel, the reagent such as epichlorohydrin is used for alkylation reaction, the epoxypropyl group can be introduced at the 2 position of cyclododecanone with high efficiency, compared with the alkylation reagents such as allyl alcohol and allyl acetate used in the traditional process, the method does not need a free radical initiator, and the monoalkylated product can be obtained with high selectivity, without double alkylation, multiple alkylation by-products, and the reaction yield is significantly improved. Secondly, the hydrogenation method can selectively obtain 2-(3-hydroxypropyl)-cyclododecanone, the reaction yield is high, and the selectivity is good. The method has good application prospect.

The invention discloses a preparation method of an anti-static antibacterial polyester fiber, and relates to the technical field of functional fiber materials. When the anti-static antibacterial polyester fiber is prepared, graphene oxide is activated and then grafted with 2-amino-4, 6-dichloropyrimidine, and then the grafted graphene oxide reacts with allyl alcohol to prepare double-bond functionalized pyrimidine modified graphene oxide; the preparation method comprises the following steps: reacting maleic acid with 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide to prepare a phosphorus-containing dicarboxylic acid flame retardant; ethylene glycol, terephthalic acid, maleic anhydride and a phosphorus-containing dicarboxylic acid flame retardant are subjected to copolycondensation to prepare double-bond functionalized flame-retardant modified polyester; blending and crosslinking the double-bond functionalized pyrimidine modified graphene oxide and the double-bond functionalized flame-retardant modified polyester, and performing melt spinning to obtain modified polyester fibers; finally, the anti-static antibacterial polyester fiber is prepared through vitamin C reduction treatment and silver nitrate loading. The polyester fiber prepared by the invention has antistatic property, antibacterial property and flame retardant property.

The present application relates to the preparation of new physiological and pharmaceutically active molecules, and belongs to the field of pharmaceutical synthesis chemistry, and relates to the design and preparation of a class of molecules capable of inhibiting the activity of human kallikrein. Firstly, fluoroacrylic acid and alcohol compounds are used as raw materials to obtain a class of fluoroallyl alcohol compounds; then the fluoroallyl alcohol is condensed with carboxylic acid compounds to obtain fluoroallyl carboxylic acid ester compounds with general formula (I) capable of inhibiting the activity of human kallikrein. The compounds are considered to be useful for treating diabetic complications, eye diseases and edema-related diseases. In addition, they have potential applications in the diagnosis and treatment of some cancers.

The invention discloses a method for preparing linear amino alcohol through selective hydroamine methylation of allyl alcohol, and relates to the technical field of fine chemical engineering. The invention relates to a method for preparing linear amino alcohol through selective hydroamine methylation of allyl alcohol, which is characterized in that allyl alcohol, carbon monoxide or carbon dioxide, hydrogen and N-aryl piperazine are used as raw materials, an N-heterocyclic carbene metal coordination polymer is used as a catalyst, selective hydroamine methylation of allyl alcohol is catalyzed, and the linear amino alcohol is prepared. According to the method, allyl alcohol and N-aryl piperazine which are low in price and easy to obtain are used as starting raw materials, use of expensive long-chain halide which is troublesome in synthesis is avoided, operation is easy and convenient, high-purity linear amino alcohol can be obtained without complex post-treatment and filtration, the method is suitable for large-scale industrial application, meanwhile, the linear selectivity of the reaction is high, and the method is suitable for industrial production. The linear amino alcohol can be well obtained; after the reaction is finished, the catalyst can be recycled through simple filtering operation.

The invention relates to the technical field of organic synthesis, in particular to a method for preparing a silicon-based substituted homoallylic alcohol compound through a three-component reaction of alpha-silicon-based substituted conjugated diene, an aldehyde compound and a Hantzsch ester compound under the synergistic catalysis of a chromium catalyst and a photocatalyst. The method comprises the following steps: in a nitrogen atmosphere, adding alpha-silicon-based substituted conjugated diene, an aldehyde compound, a Hantzsch ester compound, a photocatalyst and a chromium catalyst into an organic solvent, stirring the mixture at 25 DEG C under the irradiation of a 5W blue light LED lamp until the reaction is complete, and concentrating and purifying by column chromatography to obtain the silicon-based substituted homoallylic alcohol compound. The method is mild in reaction condition, simple and convenient to operate, wide in substrate application range, good in functional group compatibility and excellent in regioselectivity and diastereoselectivity (both greater than 20: 1).