156 results about "Ketonic acids" patented technology

Methods are disclosed for forming heptan-4-one, and, optionally, heptan-4-ol, from fermentable sugars. The sugars are fermented using a bacteria or yeast that predominantly forms butyric acid. The butyric acid is subjected to catalytic ketonization conditions to form heptan-4-one, with concomitant loss of water and carbon dioxide. The heptan-4-one can be subjected to catalytic hydrogenation to form heptan-4-ol, an either of these can be included in gasoline compositions. In one aspect, the fermentable sugars are derived from lignocellulosic materials such as wood products, switchgrass, or agricultural wastes, which are delignified to form lignin, cellulose and hemicellulose. The cellulose and hemicellulose can be depolymerized to form glycose and xylose, either or both of which can be fermented by the bacteria. Thus, the methods described herein can convert biomass to a fuel composition or fuel additive, which can be used in a conventional gasoline engine, unlike traditional fuels such as ethanol or biodiesel.

The invention discloses a productive technology of vanlillin by a glyoxylic acid method. The productive technology comprises a synthesis process, a fractionation process and a purification process, wherein the synthesis process comprises condensation treatment, oxidation treatment and decarboxylation treatment of methyl catechol and glyoxylic acid. The productive technology particularly comprisesthe following steps: respectively converting the methyl catechol and the glyoxylic acid into guaiacol sodium and sodium glyoxylate in a sodium hydroxide system; carrying out condensation treatment onthe guaiacol sodium and the sodium glyoxylate; after recovering the unreacted methyl catechol in a condensation liquid, carrying out oxidation treatment, namely carrying out catalytic oxidation on anethanol group in 4-hydroxy-3-methoxybenzene sodium glycolate by using copper oxide in the sodium hydroxide system to form a ketone group, thereby generating a corresponding ketonic acid compound; after separating red copper oxide particles from an oxidation liquid, carrying out decarboxylation treatment, namely using sulfuric acid to acidize the oxidation liquid, and simultaneously converting an acid group in the ketonic acid compound into carbon dioxide so as to generate 4-hydroxy-3- methoxybenzaldehyde; and carrying out the fractionation process and the purification process to obtain the vanlillin.

The invention relates to an action of ferulic acid on enhancing the drug effect of some medicaments and a purpose thereof, wherein the medicaments mainly comprise alkaloid medicaments including matrine, kushenin, sophocarpine, hyoscyamine, narceine, hanfangchin A, jamaicin, morphine, codeine, evodiamine, strychnine, catharanthine, vincristine, taxol, verticine, peimine, peiminine, ephedrine, pseudoephedrine, wilfordine, triptolide, tripdiolide and the like, and flavonoid medicaments including puerarin, ginsenoside, ginsengenin, mangiferin, scutelloside, alkannin, meletin, rutin, hesperidin, daidzin, soybean isoflavone, daidzein, carthamin, catechin and the like. The ferulic acid and the medicaments can form a compound or a medicament compound, or the ferulic acid and the medicaments can generate a chemical reaction (including salification, esterification, amidation, ketonization, etherification and the like), and/or the ferulic acid and the medicaments can generate a synergistic effect and an additive effect.

The present invention discloses filter paper sheet gas chromatography-mass spectrum analysis process of organic acid/amino acid metabolic product in urine. The process includes elution of urine collected with filter paper, oximation reaction, extraction, methyl silane derivation, and united detection with chromatographic instrument and mass spectrograph. The process of the present invention is superior in that the filter paper collection of urine favors remote analysis of genetic metabolic diseases; the oximation reaction processing favors alpha-ketonic acid detection for diagnosis of branched chain ketonic acid metabolic disorder; the extraction has high recovery rate of organic acid/amino acid metabolic product, high repeatability, less chromatographic impurity peaks and no pollution to chromatographic capillary column and mass spectrographic ion source; and the united detection is suitable for screening analysis of great amount of samples.

Carboxylic acid mixtures form unsymmetrical ketones in yields approaching statistical using zirconia catalysts promoted with Group IA and IIA elements. Active catalysts exist in their monoclinic or tetragonal but not cubic form. And the level of promoter loading is generally less than ten percent. The advantages of this catalyst over other ketonization catalysts include its high selectivity to ketones, its low formation of dehydrogenated byproducts, and its stability. The catalyst stability permits its regeneration to remove carbon accumulations by air oxidation. This regeneration restores full catalytic activity.

The invention discloses a method for synthesizing coumarin and derivatives thereof under catalysis of choline ionic liquids. According to the technical scheme, the method is characterized in that the coumarin and the derivatives thereof are prepared from a phenolic compound and beta-ketonic acid or keto ester under the catalytic action of choline ionic liquids and the choline ionic liquids include an ionic liquid of melted binary acid and choline chloride, a functionalized acidic choline ionic liquid and a protonized choline ionic liquid. According to the method disclosed by the invention, the synthesized choline ionic liquid is used for Pechmann condensation reaction; the negative and positive ions of the ionic liquids are adjusted according to the catalytic effect based on different acid-base properties of the ionic liquids, so that better catalytic effect can be achieved; the choline ionic liquids take the place of dangerous concentrated sulfuric acid when the choline ionic liquids are used for catalyzing the Pechmann reaction; the reaction conditions are simple, the product is easy to separate and no by-product is generated; more importantly, the catalyst can be reused.

The invention relates to a drug preparation and a preparation method thereof, in particular to a compound Alpha-ketonic acid chewable tablet used for curing chronic renal failure, and a preparation method thereof. The compound Alpha-ketonic acid chewable tablet comprises the following components: Alpha-ketophenylalanine calcium, Alpha-hydroxymethionine calcium, Alpha-ketoleucine calcium, Alpha-ketoisoleucine calcium, Alpha-ketovaline calcium, tryptophan, histidine, tyrosine, threonine, lysine, acetate, a filling agent, a bonding agent, a taste-masking agent, a lubricant and a coating agent. The compound Alpha-ketonic acid chewable tablet not only widens the dosage form range of the compound Alpha-ketonic acid chewable tablets, but also has the advantages of having good dispersing state, short disintegration time, fast drug dissolution, rapid absorption, high biological availability and convenient taking, being capable of being swallowed, chewed and sucked and being especially suitable for old people, stroke patients, patients with special diseases and patients having swallowing difficulty.

The invention discloses escherichia coli gene engineering bacteria for four enzyme co-expression. The engineering bacteria is characterized by introducing an L-amino acid oxidase gene, an alpha-ketonic acid decarboxylase gene, an alcohol dehydrogenase gene, and an enzyme gene capable of reducing NAD(P) to NAD(P)H. The invention further discloses a construction method and application of recombinantescherichia coli. The engineering bacteria is applied to biological synthesis of phenylethyl alcohol compounds, has the characteristics of simple operation, low cost, high product synthetic efficiency, and high optical purity, and has bright industrial prospects.

The invention relates to a method for synthesizing chiral beta-acetenyl ketone by catalytic intermolecular decarboxylation from beta-ketonic acid and a propargyl compound. A chiral copper catalyst adopted in the invention is synthesized in stiu from a copper salt and a chiral P,N,N-tridentate ligand in various polar solvents and nonpolar solvents. According to the invention, various chiral beta-acetenyl ketone compounds with substituent groups can be synthesized conveniently, and can obtain a percent enantiomeric excess as high as 95%. The method in the invention is advantaged by operational simplicity, available raw materials, wide substrate application range, high enantioselectivity, and the like.

The invention relates to a method for preparing alpha-calcium picrolonate, which comprises the following steps of: adding alpha-ketonic acid into a proper amount of water; adjusting a PH value to 3-6 by using calcium carbonate or calcium bicarbonate; controlling the temperature to be 0-40 DEG C; concentrating, crystallizing and obtaining the product alpha-calcium picrolonate. The process is simple, is easy for operation, can finish reaction in one step and has high product yield and high quality without producing other by-products and can be used for the industrialized production of the alpha-calcium picrolonate.

The invention discloses a method for producing L-glufosinate-ammonium by using transaminase and an ethylene-forming enzyme. According to the method, 2-carbonyl-4-(hydroxyl methyl phosphoryl) butyric acid or salt thereof is taken as a raw material, and the L-glufosinate-ammonium is obtained through a catalytic reaction of the transaminase and the ethylene-forming enzyme under the condition of taking glutamic acid or salt thereof as an amidogen donor. According to the method, the 2-carbonyl-4-(hydroxyl methyl phosphoryl) butyric acid or the salt thereof is taken as a substrate, and the L-glufosinate-ammonium is obtained through the co-catalysis of the transaminase and the ethylene-forming enzyme under the condition of taking the glutamic acid or the salt thereof as the amidogen donor, so that by-product alpha-dibasic ketonic acid after a transamination reaction is completely converted into carbon dioxide and ethylene through catalysis of the ethylene-forming enzyme, under the condition of guaranteeing few using amount of the raw materials, the conversion rate of the raw materials is obviously improved, the cost of the raw materials is reduced, the subsequent purification technology is simplified, and the product total recovery is improved.

The invention relates to the field of bioengineering and biotechnologies, and discloses a method for producing 2-phenylethanol under biological catalysis. The method comprises the following steps: adding wet cells of E.coli/Pdh, E.coli/Kdc and E.coli/ADH undergoing induced expression into a biological catalysis system taking L-phenylalanine as a substrate for performing a catalytic reaction; centrifuging after finishing the reaction; extracting supernatant to obtain the 2-phenylethanol. In the method, the L-phenylalanine is taken as the substrate, and recombinant escherichia coli transformed with a phenylalanine dehydrogenase gene, a 2-keto acid decarboxylase gene and an alcohol dehydrogenase gene is added into a reaction system for performing a biological deamination, decarboxylation and reduction three-step catalytic reaction in order to generate a product, namely, phenylethanol; a coenzyme, namely, NAD (Nicotinamide Adenine Dinucleotide) is added once and can be recycled, excess ketonic acid and hydrogen sources do not need to be added, no unnecessary side products are generated, a high substrate transforming rate is achieved, and the yield of the phenylethanol is increased remarkably.

The invention provides a device and a method for preparing bioaviation fuel. The device comprises a biomass ketonization reaction system, a carbon chain elongation reaction system, a zeolite catalytic reaction system and an alkane and arene mixing system, wherein the biomass ketonization reaction system is used for catalytically converting biomass into ketones and other monofunctional compounds in an orientated manner, and separating the ketones from the other monofunctional compounds; the carbon chain elongation reaction system is used for converting the ketone platform compounds produced by the biomass ketonization reaction system into alkanes and cycloalkanes through aldol condensation, hydrogenation isomerism and other reactions; the zeolite catalytic reaction system is used for converting the other monofunctional compounds produced by the biomass ketonization reaction system into arenes through zeolite catalytic conversion; the alkane and arene mixing system is used for mixing the alkanes, the cycloalkanes and the arenes according to a certain ratio to obtain the final aviation fuel. With the method, full-component utilization of the biomass can be achieved, the aviation fuel containing the straight-chain alkanes, the cycloalkanes, the arenes and many other components can be prepared, and the ratio of the components is controllable; a novel way of converting the biomass into the aviation fuel is provided.

The invention relates to a process for producing ketones or hydrocarbon base oil from fatty acids preferably derived from a biological origin or other renewable source. The process is directed at making an aliphatic ketone or a mixture of aliphatic ketones having 14 to 52 carbon atoms, comprising a ketonization reaction of a fatty acid in a vapor phase with a decarboxylation-coupling catalyst to provide ketones, which can be deoxygenated to give saturated hydrocarbons, unsaturated hydrocarbons, and mixtures thereof. Base oils and transportation fuels may be produced from the process herein.

The invention relates to a preparation method of 2-methoxyiminofurylacetic acid amonium salt, and belongs to the technical field of medical intermediate preparation. The preparation method of the 2-methoxyiminofurylacetic acid amonium salt comprises the steps as follows: reacting acetylfuran and sodium nitrite to obtain furan ketonic acid under the catalyzing of metal salt; and then mixing the furan ketonic acid and methoxy-ammonium salt to obtain the 2-methoxyiminofurylacetic acid amonium salt. According to the preparation method provided by the invention, the transformation rate of the furan ketonic acid can be improved under the catalysis of the added metal salt, the side reaction is reduced, therefore, the yield of the 2-methoxyiminofurylacetic acid amonium salt is improved; the preparation method is simple and convenient in operation, low in cost, high in safety, and high in yield; and the quality of the prepared product meets the requirement of national standard.

The present invention relates to an optically pure alpha- ketoacyl harringtonine and a preparing and purifying method thereof. In the temperature of -80 DEG C to 50 DEG C, the alpha-ketoacyl chlorine which is prepared through reacting alpha-ketonic acid and oxalyl chloride reacts with the cephalotaxine in an inert organic solvent while the organic base is used as an acid-binding agent for obtaining the oily product represented by the formula (I). The purifying steps are as follows: dissolving the oily product with the inert organic solvent, adding the saturated NaHSO3 solution, mixing and separating the liquid; after washing the water phase with the organic solvent, adjusting the pH of the water phase with saturated NaHSO3 solution to 7-8, extracting with the organic solvent; washing the organic phase with the buffering solution with pH of 6.8 and the saturated saline solution, drying and filtering the organic phase, removing the solvent for obtaining the pale-yellow solid; and then recrystallizing with the organic dissolvent for obtaining the white solid or colorless crystal. The optically pure alpha- ketoacyl harringtonine is a key intermediate for synthesizing the medicine of harringtonine alkaloid, which is widely applied for anti-tumor (malignant tumor and benign tumor), antiparasitic, antifungal and antibacterial chemotherapy. The synthesizing method is suitable for purifying and preparing the large amount of optically pure compound represented by the structural formula of (I).

The invention belongs to the technical field of medicine and discloses a preparation method of muscarinic receptor antagonist glycopyrronium bromide. The preparation method of the muscarinic receptor antagonist glycopyrronium bromide is characterized in that Alpha-cyclopentyl mandelic acid methyl ester is obtained by aceptophenone ketonic acid Grignard reaction and esterification reaction, and then glycopyrronium bromide is obtained by N-methyl pyrrolidine-3-alcohol ester exchange and quaterisation.

The invention provides a C2-C12 aliphatic carboxylic acid ketone activator. The invention uses ª†-aluminum oxide as carrier and the single, double elements, and ternary elements of lanthanum, cerium, praseodymium and neodymium of light lanthanide series rare earth as active components. While the activating carrier method comprises (1) the heat treatment process while the treatment temperature is 480-800 Deg. C; (2) azotic acid aqueous solution method while the concentration of azotic acid aqueous solution is 5-45%; (3) evacuation method. In addition, the activator is prepared via the immersion method while it can be used to C2-C12 aliphatic carboxylic acid ketone.

The invention discloses a method for synthetizing chiral cyclic alkyl amino acid by amino transferase. The commercialized material ketonic acid or corresponding soluble ketonic acid salt compound in the market is selected as an initial material; the initial material is dissolved into phosphate buffer, and added to an amino supply body; pyridoxal phosphate (PLP) and amino transferase main enzyme are added to a system containing the amino supply body and main material ketonic acid or corresponding soluble ketonic acid salt compound to react under constant temperature, and obtaining a product with a high ee value, wherein n is equal to 1, 2, 3, 4, 5, or obtaining a product wherein n is equal to 0 and 1. The method is stable in technological condition, simple to operate, high in yield, low in cost, and suitable for large-scale production, and beneficial for environmental protection; and a novel train of thought and a method are provided for the preparation of chiral cyclic alkyl amino acid compound.

The invention discloses a synthesis method of diethylstilbestrol compound methyl pigeon pea ketonic acid A. The synthesis method comprises the steps: esterifying a compound with a formula (I) to generate a compound with a formula (II); reducing the compound with the formula (II) to generate a compound with a formula (III); carrying out substitution on the compound with the formula (III) to generate a compound with a formula (IV); carrying out substitution on the compound with the formula (IV) to generate a compound with a formula (V); carrying out alkylation on the compound with the formula (V) to generate a compound with a formula (VI); carrying out esterolysis on the compound with the formula (VI) to generate a compound with a formula (VII); carrying out decarboxylation on the compound with the formula (VII) to generate a compound with a formula (VIII); carrying out dehydration cyclization on the compound with the formula (VIII) to generate a compound with a formula (IX); carrying out condensation on the compound with the formula (IX) to generate a compound with a formula (X); carrying out five-membered ring breakage on the compound with the formula (X) to generate a compound with a formula (XI); carrying out condensation on the compound with the formula (XI) to generate a compound with a formula (XII); carrying out coupling on the compound with the formula (XII) to generate a compound with a formula (XIII); carrying out esterolysis on the compound with the formula (XIII) to generate a compound with a formula (XIV), namely methyl pigeon pea ketonic acid A.

The invention discloses a catalyst for preparing acetone through gas phase catalytic ketonization of acetic acid. The catalyst is characterized by consisting of the following components in percentage by weight: 5-40 percent of activated carbon, 55-85 percent of oxide carrier and 3-25 percent of active component oxide. The catalyst disclosed by the invention has the advantages of simple preparation method, low cost, high activity and high selectivity.

The invention discloses application of pigeon pea ketonic acid A in terms of preparation of medicines for accompanied diseases of diabetes mellitus or hyperlipidaemia. Animal experiment data show that the pigeon pea ketonic acid A can remarkably reduce the serum triglyceride level, the total cholesterol level and the low-density lipoprotein cholesterol level of SD (Sprague-Dawley) rats with type-2 diabetes mellitus, and can treat or improve the hyperlipidaemia as an accompanied disease of the diabetes mellitus; and pathological research results prove that the pigeon pea ketonic acid A can reduce spotty necrosis of hepatocytes, can treat or improve liver injury as an accompanied disease of the diabetes mellitus, reverses injury to tissues of pancreas inlets of the rats due to glucoses, and has protection and repair effects on pancreas. The pigeon pea ketonic acid A can remarkably reduce the serum triglyceride level and the total cholesterol level of Zucker rats with congenital obesity, and is proved to be capable of treating or improving the hyperlipidaemia.

The invention provides a high-density potassium salt-resistant cementing slurry applied to high-pressure oil-gas wells and high-pressure potassium salt well cementing construction. The high-density potassium salt-resistant cementing slurry is prepared from the raw materials in percentage by mass: 29-58% of Jiahua grade-G cement, 12-56% of a weighting agent, 1.8-3.5% of active micro-nano silicon, 10-20% of 80-mesh quartz sand, 1-2% of a salt-resistant dispersing agent, 1.8-4% of a salt-resistant fluid loss agent, and 0.3-1.0% of salt-resistant retarder, wherein the weighting agent is a mixture of 250-mesh hematite and 1200-mesh hematite, the salt-resistant dispersing agent is a formaldehyde/acetone copolymer, the salt-resistant fluid loss agent is the polymer of N,N-dimethacrylamide and maleic anhydride, and the retarder is the compound of ketonic acid and organic phosphate; the density of the cementing slurry is 2.0-2.6 g/cm<3>, the fluidity of the cementing slurry is 19-21 cm, the API (American Petroleum Institute) fluid loss of the cementing slurry is not greater than 50 ml, the rheological property n of the cementing slurry is not less than 0.5, and K is not greater than 2.

Disclosed is a process for reducing the emission of volatile organic compounds that are produced during the ketonization of carboxylic acids to ketones. The ketonization of carboxylic acids produces a gaseous by-product stream containing carbon dioxide and volatile organic compounds. This gaseous by-product stream can be fed to a direct-fired furnace used to heat the ketonization reaction feed streams where the volatile organic compounds are destroyed by combustion in the furnace. The carbon dioxide stream further acts as a diluent for the fuel to the furnace.