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53 results about "Angelica lactone" patented technology
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Method for preparing alpha-angelica lactone from acetylpropionic acid
ActiveCN101475545AAvoid other side effectsHigh selectivityOrganic chemistryMolecular sieve catalystsPropanoic acidGas phase
The invention provides a method for preparing alpha-angelica lactone by levulinate. The method comprises the following steps: an inorganic liquid acid or a solid acid catalyst which is 1 to 10 weight percent of the levulinate is added into the levulinate; the levulinate and the alpha-angelica lactone in a gaseous phase of a reaction system are separated by rectifying at a temperature of between 100 and 150 DEG C with vacuum degree of between 20 and 150mmHg; the levulinate returns to the reaction system; the alpha-angelica lactone is condensed at a temperature of between 60 and 90 DEG C; and the product is obtained through separating and rectifying. The method has the advantages of high selectivity, high purity, and applicability of serialized industrial production.
Owner:SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
Gasoline prepared from biomass-derived levulinic acid
The present invention provides methods for preparing a C6-C10 alkane, and mixture thereof. The methods include forming a reaction mixture containing an angelica lactone dimer, a catalyst, and a hydrogen source under conditions sufficient to reduce the angelica lactone dimer, thereby preparing the alkane. The methods can be used to prepare branched alkanes useful for fuels. Methods for preparing an angelica lactone, methods for preparing an angelica lactone dimer, and methods for reducing a lactone to an alkane are also described.
Owner:RGT UNIV OF CALIFORNIA
Preparation of levulinic acid esters from alpha-angelica lactone and alcohols
InactiveUS20050210738A1Preparation by ester-hydroxy reactionLiquid carbonaceous fuelsAlcoholAlkaline catalyst
The present invention relates to a process for producing levulinic acid esters from α-angelica lactone and alcohols in the presence of a basic catalyst. In addition, a method is described herein for producing fuel or fuel additives comprising levulinic acid esters produced from α-angelica lactone and alcohol. In addition, compositions are described comprising levulinic acid esters for use as fuel or fuel additives.
Owner:EI DU PONT DE NEMOURS & CO
Preparation method of aviation kerosene or diesel oil
ActiveCN107400531AEfficient removalLow priceLiquid hydrocarbon mixture productionBio-feedstockAviationKerosene
The invention relates to a new path for synthesizing liquid chain hydrocarbon fuel on the basis of adopting lignocelluloses and hemicelluloses platform compounds as materials. The method comprises the following three parts: (1) catalyzing angelica lactone and biomass aldehyde / ketone compound by using amphoteric metal oxide ion liquid as a catalyst and preparing A-R series of lactone type aviation kerosene precursors; (2) carrying out low-temperature hydrogenation on the lactone type aviation kerosene precursors to effectively remove carbon-carbon double bonds in the lactone type aviation kerosene precursors so as to prepare a liquid saturated oxygen-containing compound containing a lactone structure; and (3) carrying out hydrogenation and deoxidation on pre-hydrogenated products by adopting metal / solid acid catalyst so as to obtain biomass aviation kerosene or high-quality diesel oil with the carbon-chain length being 6-11.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Preparation method of aviation kerosene or diesel oil
The invention discloses a preparation method of aviation kerosene or diesel oil, and relates to a new path for compounding liquid-state chain hydrocarbon fuel based on a raw material of lignocelluloses platform chemical compound. The preparation method is divided into three parts: (1) preparing 4,4-bis(5-methyl furan-2-furyl) pentanoic acid from a dehydrated product-angelica lactone of levulinic acid in an acid catalyst and 2-methyl furan through an acid catalytic alkylation reaction; (2) hydrogenating the 4,4-bis(5-methyl-2-furyl) pentanoic acid, effectively removing C-C double bonds and C-H double bonds in the 4,4-bis(5-methyl-2-furyl) pentanoic acid, and preparing a saturated organic compound containing oxygen; (3) carrying out hydrodeoxygenation on a hydrogenated alkylate by adopting a metal-carbon catalyst, thus obtaining biomass aviation kerosene or high-quality diesel oil of which the carbon chain length is 8 to 15.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Method for quantitatively analyzing lactones aromatic substances in mainstream smoke of fine cigarettes
ActiveCN105784912AResponsiveGood repeatabilityComponent separationLinear correlationDihydroactinidiolide
The invention discloses a method for quantitatively analyzing lactones aromatic substances in mainstream smoke of fine cigarettes. The method is used for determining the content of three types of main lactones aromatic substances including alpha-angelica lactone, gamma-caprolactone and dihydroactinidiolide in the mainstream smoke of the fine cigarettes based on a gas chromatography-tandem mass spectrometer, and comprises the steps of preparing an internal standard solution, a standard working solution and a sample solution, analyzing by the gas chromatography-tandem mass spectrometer, and calculating a determined result and the like. The optimized detection method disclosed by the invention is relatively simple and convenient, and sensitive to respond and can be used for accurately quantitatively analyzing; matrix interferences are effectively avoided, and the linear correlation is relatively good; the detection limits of the three types of main lactones aromatic substances including the alpha-angelica lactone, the gamma-caprolactone and the dihydroactinidiolide are 4.23ng / piece, 1.86ng / piece and 1.87ng / piece respectively, the repetitive rates are 1.31%, 3.57% and 1.93% respectively, and the standard recovery rates are 108.3%, 115.4% and 89.4% respectively. The method disclosed by the invention has high sensitivity and relatively good repeatability and recovery rate, and is applicable to quantitative analysis of trace target matters in complicated matrixes of the smoke of the fine cigarettes.
Owner:CHINA TOBACCO JIANGSU INDAL
Non-water electrolyte for lithium ion battery as well as preparation and application thereof
InactiveCN101702446AImprove initial discharge capacityImprove cycle performanceFinal product manufactureElectrolyte accumulators manufactureDecompositionCarbonate ester
The invention discloses a non-water electrolyte for a lithium ion battery as well as a preparation method and application thereof. In the invention, cyclic carbonate ester and chain carbonate ester are mixed; and then lithium salts and film forming additive are added in sequence to obtain the non-water electrolyte for the lithium ion battery. The non-water electrolyte is prepared by adding dimethyl vinylene carbonate, furanone or Alpha-angelica lactone in the traditional non-water electrolyte for the lithium ion battery, wherein the dimethyl vinylene carbonate, the furanone and the Alpha-angelica lactone can restrict the decomposition of the electrolyte and participate in the formation of a positive SEI film and a negative SEI film, therefore, the decomposition of the electrolyte under the high temperature can be effectively restricted, the initial discharge capacity and the circulation property of the lithium ion battery can be enhanced, and the capacity storage characteristic of the battery under the high temperature can be improved. Besides, the introduction of the dimethyl vinylene carbonate, the furanone or the Alpha-angelica lactone can also improve the thermal stability of the electrolyte. The prepared non-water electrolyte for the lithium ion battery has low cost and better application prospect.
Owner:SOUTH CHINA NORMAL UNIVERSITY
Method for preparing gamma-valerolactone by liquid-phase hydrogenation and catalyst used by same
InactiveCN104693159AHigh selectivityMild reaction conditionsOrganic chemistryMetal/metal-oxides/metal-hydroxide catalystsGamma-ValerolactoneTransfer hydrogenation
The invention discloses a method for preparing gamma-valerolactone by liquid-phase hydrogenation, which comprises the following step: under the conditions of low temperature and low pressure, carrying out high-selectivity hydrogenation on alpha-angelica lactone by using a supported catalyst to obtain the gamma-valerolactone. The invention also discloses the supported catalyst and a preparation method thereof, and application of the supported catalyst in the method for preparing gamma-valerolactone by liquid-phase hydrogenation. The method has the advantages of mild reaction conditions, high catalytic activity, high selectivity of the product gamma-valerolactone and the like.
Owner:EAST CHINA NORMAL UNIV
Method for identifying chuanxiong rhizomes in far-reaching tonic wine
InactiveCN106290697AEfficient identificationEasy to operateComponent separationAdditive ingredientReference product
The invention discloses a method for identifying chuanxiong rhizomes in far-reaching tonic wine. The method is a thin layer chromatography method that chuanxiong rhizome reference medicine materials and European angelica lactone A reference products are adopted as reference, and the ratio of normal hexane to ethyl acetate is (3-6):(1-2). The method for identifying the chuanxiong rhizomes in the far-reaching tonic wine is easy to operate and high in controllability, and the chuanxiong rhizome ingredient in the far-reaching tonic wine can be efficiently identified. The method is high in separation degree, good in reproducibility, high in specificity, high in sensitivity and good in stability, feminine reference is free of interference, and thin layer plates of different factories and the temperature and humidity conditions all have no influence. According to the method for identifying chuanxiong rhizomes in the far-reaching tonic wine, the chuanxiong rhizome ingredient in the far-reaching tonic wine can be identified accurately, comprehensively, scientifically and effectively, the quality detection standard is improved, and the stability, safety and effectiveness of product quality are further ensured.
Owner:GUIZHOU XINBANG PHARMACEUTICAL CO LTD
Cellulose levulinate and method for preparing mixed ester with same
The invention discloses cellulose levulinate and a method for preparing mixed ester with the same. Hybrid reaction is carried out on celluloses, organic alkali and organic solvents to obtain cellulosesolution; levulinic acid base ester or angelica lactone is added into the cellulose solution, and reaction is carried out to obtain cellulose levulinate solution; anti-solvents are added into the cellulose levulinate solution, and then filtering, washing purification and drying are carried out to obtain the cellulose levulinate. The method includes dissolving the cellulose levulinate; adding acylation reagents; then adding C1-C4 low fatty alcohol, ethyl acetate or water; carrying out filtering, purification and drying to obtain the cellulose levulinic acid mixed ester. The cellulose levulinate and the method have the advantages that levulinic acid functional areas with active carboxyl are constructed on cellulose molecular chains in an in-situ manner, cellulose derivatives with novel structures, adjustable properties and levulinic acid structures are prepared, accordingly, the celluloses can be structurally specifically derived, and the cellulose levulinate and the method have important significance in high-valued utilization of the celluloses.
Owner:GUIZHOU UNIV
Non-aqueous electrolyte battery
InactiveUS20050064295A1Preventing reduction of initial charging efficiency of batteryPreventing reduction of initial charging efficiencyOrganic electrolyte cellsNegative electrodesEngineeringThermal stability
A non-aqueous electrolyte battery with improved cyclic characteristics and battery capacity at high temperature and capable of suppressing the evolution of gas during storage at high temperature while maintaining favorable cyclic performance, wherein vinylene carbonate (VC) and α-angelica lactone (4-hydroxy-3-pentenic acid γ-lactone) are contained in the electrolyte, and whereby a highly soft and flexible coating film with α-angelica lactone is formed on the surface of the negative electrode without reducing the initial charging efficiency of the battery. Since a mixed coating film comprising VC and α-angelica lactone is formed on the soft and flexible coating film and the mixed coating film has higher thermal stability at high temperature than that of the coating film formed only with VC, the cyclic characteristics of the battery at high temperature can be improved while enhancing the suppression of gas evolution during storage at high temperature.
Owner:SANYO ELECTRIC CO LTD
Catalyst for preparing gamma-valerolactone from alpha-angelica lactone, and preparation method and application thereof
ActiveCN101733125ALow costSimple processOrganic chemistryMetal/metal-oxides/metal-hydroxide catalystsActive componentGamma-Valerolactone
The invention provides a catalyst for preparing gamma-valerolactone from alpha-angelica lactone, which is characterized by comprising the following components in percentage by mass of oxide: 10-90% of an active component, 0.05-20% of a cocatalyst and a carrier. The method has the advantages of low cost, simple technique, easy operation, high product yield and high safety in the production process.
Owner:SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
Tobacco essence capable of remarkably improving incense and taste of tobacco leaf regenerated by paper-making process
ActiveCN103103021AImprove aroma qualityImprove qualityEssential-oils/perfumesQuality levelPhenylacetic acid
The invention discloses tobacco essence capable of remarkably improving incense and taste of tobacco leaf regenerated by a paper-making process and relates to a tobacco additive. In order to overcome the defects of the existing domestic paper-making process in the quality level of the tobacco leaf regenerated and improve the integrated quality of the tobacco leaf regenerated by the paper-making process, the invention provides a tobacco essence capable of remarkably improving incense and taste of tobacco leaf regenerated by the paper-making process. The tobacco essence is characterized in that the materials of the tobacco essence include the base material prepared from the following components in percentage by weight: 0.15%-0.4% of lysimachia foenum-graecum extract, 0.2%-0.7% of fenugreek seed extract, 0.15%-0.4% of plum extract, 0.04%-0.14% of phenethyl alcohol, 0.04%-0.14% of linalool oxide, 0.04%-0.14% of phenylacetic acid, 0.06%-0.21% of angelica lactone, 0.02%-0.07% of benzpyrole and the balance of 95% of alcohol. The tobacco essence can be popularized and used in all cigarettes factory of China.
Owner:SHENZHEN TOBACCO IND
Additive for enhancing fragrance of tobacco stem shreds
ActiveCN102304424AAdds natural aroma characterAdds natural sweet aromaTobacco preparationEssential-oils/perfumesBiotechnologyNicotiana tabacum
The invention discloses an additive for enhancing fragrance of tobacco stem shreds. The additive consists of the following components in percentage by mass: 1 to 5 percent of ethyl berry ketones, 0.1 to 2 percent of ethyl maltol, 1 to 5 percent of alpha-angelica lactone, 0.1 to 2.5 percent of pyromeconic acid lactone, 20 to 50 percent of propylene glycol, 30 to 45 percent of distilled water and 5to 15 percent of edible ethanol. By adoption of the additive, inferior peculiar smell of tobacco stem shreds can be avoided, and the tobacco stem shreds and leaves are endowed with good quality and fragrance.
Owner:GUANGZHOU AOJIAN PERFUME
Non-aqueous electrolyte battery
InactiveCN1591962AInhibitionPromote circulationOrganic electrolyte cellsNegative electrodesThermal stabilityBattery capacity
A non-aqueous electrolyte battery with improved cyclic characteristics and battery capacity at high temperature and capable of suppressing the evolution of gas during storage at high temperature while maintaining favorable cyclic performance, wherein vinylene carbonate (VC) and alpha-angelica lactone (4-hydroxy-3-pentenic acid gamma-lactone) are contained in the electrolyte, and whereby a highly soft and flexible coating film with alpha-angelica lactone is formed on the surface of the negative electrode without reducing the initial charging efficiency of the battery. Since a mixed coating film comprising VC and alpha-angelica lactone is formed on the soft and flexible coating film and the mixed coating film has higher thermal stability at high temperature than that of the coating film formed only with VC, the cyclic characteristics of the battery at high temperature can be improved while enhancing the suppression of gas evolution during storage at high temperature.
Owner:SANYO ELECTRIC CO LTD
Catalyst for preparing gamma-valerolactone by alpha-angelica lactone, preparation method and application
ActiveCN101733097ASimple processEasy to operateOrganic chemistryMetal/metal-oxides/metal-hydroxide catalystsActive componentGamma-Valerolactone
The invention relates to a catalyst for preparing gamma-valerolactone by alpha-angelica lactone, which is characterized by comprising the following components by weight percent calculated by oxide: 0.5-15% of active component, 0.05-20% of catalyst accelerator and the balance of carrier. The invention has the advantages of low cost, simple process, easy operation, high product yield and good safety in the production process.
Owner:SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
Functionalized a- angelica lactone monomers and polymers obtained therefrom
The present invention is directed to a monomer for chain growth polymerization, in particular anionic polymerization, said monomer having the general formula (EFL)wherein: Ra is a C1-C30 alkyl, C3-C30 cycloalkyl, C6-C18 aryl or C2-C12 alkenyl group. The present invention is further directed to a process for the anionic polymerization of at least one compound (EFL) as defined above, wherein said anionic polymerization is conducted in the presence of an initiator selected from the group consisting of: alkali metal organyls; alkali metal alkoxides; alkali metal thiolate; alkali metal amides; and compounds of an element of group 3a of the Periodic Table of the Elements. The process of anionic polymerization yields a homo- or co-polymer (p-EFL) having pendant lactone functional groups in its repeating units.
Owner:HENKEL KGAA
Recombined maple essence based on aroma threshold, recombination method of maple essence and application of maple essence in cigarette
ActiveCN109135922AIncrease profitImprove the efficiency of fragranceTobacco preparationTobacco treatmentKetoneLinalool
The invention relates to recombined maple essence based on an aroma threshold. The recombined maple essence is characterized by being composed of aroma components, sugars and solvents, the weight percentage of the recombined maple essence is 100%, the aroma components include methyl cyclopentenolone, 2-acetyl furan, 5-hydroxymethyl furfural, furfural, acetyl pyrrole, 2.6-dimethylpyrazine, beta-malaysian ketone, linalool, fenugreek lactone, alpha-angelica lactone, benzyl benzoate, vanillin, n-nonanoic acid, citric acid and fumaric acid, the sugars include, by weight, 0-1% of cane sugar, 2-2.6%of fructose, 10-16% of glucose and 20-32% of maltose, and the balance is the solvents. When the recombined maple essence is applied to a cigarette, the cigarette aroma amount and smoke concentration can be remarkably increased, the aroma quality can be improved, comfort can be improved, and the adverse effects of burnt and bitter smell and overly sweet aroma do not exist.
Owner:CHINA TOBACCO HENAN IND
Compound containing framework of chiral indolone and angelica lactone and asymmetric synthesis method
InactiveCN102584800AHigh enantioselectivityHigh catalytic activityOrganic chemistryEpoxyPtru catalyst
The invention provides a high-efficiency synthesis method of a compound containing a chiral indolone and angelica lactone framework, which is an effective method of synthetizing a series of allyl alkylate chiral product with multifunction functional groups in high-efficiency high- enantioselectivity mode through indolone MBH (Morit-Baylis-Hill1man) carbonic ester and various angelica lactone compounds with chiral amines, especially derivatives of b-1CD ((3 S, 8R, 9S) -10, 11- dihydro -3,9 epoxy-6'- oxhydryl quinine alkyl) derived by cinchona alkaloid as catalysts, with 4 molecular sieve and R-BINOL as additives. The asymmetric synthesis method is reported for the first time, the catalysts are easy to obtain and high in catalytic activity, the asymmetric synthesis method is mild in reaction conditions, simple in operation, wide in substrate application range and high in product area and enantioselectivity. In addition, various obtained compounds containing the framework of indolone and angelica lactone can possibly have special physiological activity or become important synthesis intermediates of natural product.
Owner:SICHUAN UNIV
Anti-oral ulcer drug and application thereof
InactiveCN109431976AImprove anti-oral ulcer effectThe promotion effect is obviousOrganic active ingredientsAerosol deliveryActive componentOral ulcers
The invention relates to the field of drugs, and in particular to an anti-oral ulcer drug and application thereof. The anti-oral ulcer drug is prepared from coniferyl ferulate or coniferyl ferulate and Alpha-angelica lactone as active components. The anti-oral ulcer drug is a locally delivered drug, such as gel, paste and collutory. Coniferyl ferulate which is locally delivered has the effect of promoting the healing of oral ulcers; and when coniferyl ferulate is used along with Alpha-angelica lactone, the effect of promoting the healing of oral ulcers is better.
Owner:赵志波
Catalyst for preparing gamma-valerolactone by alpha-angelica lactone, preparation method and application
ActiveCN101733097BSimple processEasy to operateOrganic chemistryMetal/metal-oxides/metal-hydroxide catalystsActive componentGamma-Valerolactone
The invention relates to a catalyst for preparing gamma-valerolactone by alpha-angelica lactone, which is characterized by comprising the following components by weight percent calculated by oxide: 0.5-15% of active component, 0.05-20% of catalyst accelerator and the balance of carrier. The invention has the advantages of low cost, simple process, easy operation, high product yield and good safety in the production process.
Owner:SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
Method for preparing high polymer material by alpha-angelica lactone ring-opening polymerization
The invention relates to a method for preparing high polymer material by alpha-angelica lactone ring-opening polymerization; under the anhydrous and oxygen-free condition, catalyst and alpha-angelica lactone are mixed according to 1:20-10000 of the molar ratio, so as to obtain mixture; or the alpha-angelica lactone and solvent are mixed according to 1:0.5-3 of volume ratio, so as to obtain mixed liquid; the catalyst is added in the mixed liquid according to 1:20-10000 of mole ratio of the catalyst and the angelica lactone, so as to obtain the mixture; the mixture is heated to 50-220 DEG C, and the reaction is carried out for 0.5-36 hours, the reaction products are cooled to obtain the polymerization product, micromolecule compounds in the polymerization product are removed by dissolving, precipitating and separating, so as to obtain the polymer product. The polymer molecular weight is high, the molecular weight distribution is narrow, and the polymerization method is green and environmental-protection.
Owner:SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
A kind of preparation method of aviation kerosene or diesel oil
The invention discloses a preparation method of aviation kerosene or diesel oil, and relates to a new path for compounding liquid-state chain hydrocarbon fuel based on a raw material of lignocelluloses platform chemical compound. The preparation method is divided into three parts: (1) preparing 4,4-bis(5-methyl furan-2-furyl) pentanoic acid from a dehydrated product-angelica lactone of levulinic acid in an acid catalyst and 2-methyl furan through an acid catalytic alkylation reaction; (2) hydrogenating the 4,4-bis(5-methyl-2-furyl) pentanoic acid, effectively removing C-C double bonds and C-H double bonds in the 4,4-bis(5-methyl-2-furyl) pentanoic acid, and preparing a saturated organic compound containing oxygen; (3) carrying out hydrodeoxygenation on a hydrogenated alkylate by adopting a metal-carbon catalyst, thus obtaining biomass aviation kerosene or high-quality diesel oil of which the carbon chain length is 8 to 15.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
A recombinant maple flavor based on aroma threshold, its reconstruction method and its application in cigarettes
ActiveCN109135922BIncrease profitImprove performanceTobacco preparationTobacco treatmentBiotechnologyBenzyl benzoat
The invention relates to a recombinant maple essence based on fragrance threshold, characterized in that the recombinant maple essence is composed of fragrance components, sugars and solvents, wherein the recombinant maple essence is calculated as 100%, and each component in the fragrance components Including methylcyclopentenolone, 2-acetylfuran, 5-hydroxymethylfurfural, furfural, acetylpyrrole, 2.6-dimethylpyrazine, β-damascenone, linalool, trigonelactone, α-angelica lactone, benzyl benzoate, vanillin, nonanoic acid, citric acid, fumaric acid; the weight ratio of each component in the sugar is: sucrose 0-1%, fructose 2-2.6%, Glucose 10-16%, maltose 20-32%; the balance is solvent. The recombinant maple flavor is applied to cigarettes, which can significantly increase the aroma and smoke concentration of cigarettes, enhance the aroma quality, and improve comfort, and has no negative effects such as burnt bitterness, sweetness and greasy feeling.
Owner:CHINA TOBACCO HENAN IND
Application of Bic Angelica Lactone
ActiveCN105193787BEffective protectionOrganic active ingredientsOrganic chemistryMedicineRenal injury
Owner:JIANGSU KANION PHARMA CO LTD
A kind of method that takes biomass as raw material to prepare biogasoline
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI
Levulinic acid compositions
ActiveUS20190077740A1Improve performanceEvaporators with forced circulationCrystallization by component evaporationAcid catalyzedPropynoic acid
A levulinic acid composition A having: a. at least 95 wt. % of levulinic acid; b. between 5 wppm and 5000 wppm of formic acid; and c. less than 1000 wppm of angelica lactone, based on the total weight of the composition. A process for the isolation of a levulinic acid composition, having the following steps: a. performing acid catalyzed hydrolysis of a C6 carbohydrate-containing feedstock to obtain reaction product X, b. subjecting of reaction product X to solid-liquid separation to provide a composition 1, c. feeding composition 1 to at least two purification steps to treat composition 1 to obtain a levulinic acid composition, wherein a second or a further purification step is a melt crystallization step.
Owner:GFBIOCHEM IP ASSETS BV
A kind of synthetic method of α-amino-γ-carbonylpimelate compound
ActiveCN109467514BCheap and easy to getReduce manufacturing costOrganic compound preparationAmino-carboxyl compound preparationPtru catalystOrganosolv
The invention provides a method for synthesizing alpha-amino-gamma-carbonyl pimelic ester compounds. The method comprises the following steps: taking alpha-angelica lactone and an N-aryl glycine derivative as raw materials, taking cheap metal salt as a catalyst and protonic acid as an additive in an organic solvent, and performing normal temperature in air to form the pimelic ester compounds. Themethod is low in prices of reaction reagents, simple in reaction steps, easy to operate, low in production cost and small in environment pollution; the reaction time is short, aftertreatment is simpleand convenient, the yield is high, the purity is good, and the method is applicable to industrial production.
Owner:NORTHWEST NORMAL UNIVERSITY
A method for quantitative analysis of lactone aroma substances in mainstream smoke of slim cigarettes
ActiveCN105784912BResponsiveGood repeatabilityComponent separationDihydroactinidiolideLinear correlation
Owner:CHINA TOBACCO JIANGSU INDAL
Poly(alpha-angelica lactone-co-epsilon-caprolactone) and preparation method thereof
InactiveCN103755929AGood biocompatibilityPromote degradationBiocompatibility TestingStructural formula
The invention discloses poly(alpha-angelica lactone-co-epsilon-caprolactone), of which the structural formula is as shown in the specification, wherein m is smaller than 104 and greater than 10, n is smaller than 8772 and greater than 8. The poly(alpha-angelica lactone-co-epsilon-caprolactone) has the advantages of good biocompatibility and degradability, and wide application range.
Owner:SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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