119 results about "Butyric acid ester" patented technology

A non-naturally occurring microbial organism having an isopropanol, 4-hydroxybutryate, or 1,4-butanediol pathway includes at least one exogenous nucleic acid encoding an isopropanol, 4-hydroxybutryate, or 1,4-butanediol pathway enzyme expressed in a sufficient amount to produce isopropanol, 4-hydroxybutryate, or 1,4-butanediol. The aforementioned organisms are cultured to produce isopropanol, 4-hydroxybutryate, or 1,4-butanediol.

The subject disclosure provides compositions for reducing serum cholesterol and / or triglyceride levels in subjects. These compositions can comprise racemic β-hydroxybutyrate or D-β-hydroxybutyrate, optionally in the acid form, physiologically compatible salts of racemic β-hydroxybutyrate or D-β-hydroxybutyrate, esters of D-β-hydroxybutyrate, oligomers of D-β-hydroxybutyrate containing from 2 to 20 or more monomeric units in either linear or cyclic form, racemic 1,3 butandiol or R-1,3 butandiol alone and can be, optionally, administered in conjunction with a low fat diet to a subject. Alternatively, compositions comprising racemic β-hydroxybutyrate or D-β-hydroxybutyrate, optionally in the acid form, physiologically compatible salts of racemic β-hydroxybutyrate or D-β-hydroxybutyrate, esters of D-β-hydroxybutyrate, oligomers of D-β-hydroxybutyrate containing from 2 to 20 or more monomeric units in either linear or cyclic form, racemic 1,3 butandiol, R-1,3 butandiol or combinations thereof can be formulated as nutritional supplements (also referred to as nutritional compositions) or incorporated into therapeutic compositions containing a) anti-hypertensive agents; b) anti-inflammatory agents; c) glucose lowering agents; or d) anti-lipemic agents) which are administered to a subject, optionally in combination with a low fat diet, in order to cause a reduction or lowering of: serum cholesterol levels; triglyceride levels; serum glucose levels, serum homocysteine levels, inflammatory proteins (e.g., C reactive protein) and / or hypertension in treated subjects. Alternatively, compositions disclosed herein can be administered alone, or in combination with other therapeutic agents to prevent or reverse vascular disease.

The present invention relates to a method for producing optically active 2-(N-substituted aminomethyl)-3-hydroxybutyric acid esters wherein a 2-(N-substituted aminomethyl)-3-oxobutyric acid ester is treated with an enzyme source capable of stereoselectively reducing said ester to the corresponding optically active 2-(N-substituted aminomethyl)-3-hydroxybutyric acid ester having the (2S,3R) configuration. The present invention provides an efficient method for industrially producing optically active 2-(N-substituted aminomethyl)-3-hydroxybutyric acid esters, in particular such compounds having the (2S,3R) configuration, which are useful as intermediates for the production of medicinal compounds, among others.

Provided herein are processes for the preparation of (S)-(2R,3R,11bR-3-isobuty-9,10-dimethoxy-2,3,4,6,7,11b-hexahydro-1H-pyrido[2,1-a]isoquinolin-2-yl 2-amino-3-methylbutanoate di(4-methylbenzenesulfonate), or a solvate, hydrate, or polymorph thereof.

The present invention describes a process for the industrial production of L-carnitine, comprising the enantioselective reduction of an alkyl 4-chloro-3-oxobutyrate or 4-chloro-3-oxobutyramide. The optically active 3-hydroxy derivative thus obtained is reacted with trimethylamine, obtaining crude L-carnitine, which is then finally purified. The catalyst used for the reduction is a complex of ruthenium bound to a penta-atomic bis-heteroaromatic system. The reduction reaction, performed in controlled conditions of hydrogen pressure, substrate concentration, temperature, and substrate: catalyst molar ratio, enables 4-chloro-3-hydoxybutyrate or 4-chloro-hydroxybutyamide to be obtained in a high yield. The process described, which leads to L-carnitine being obtained, is easily applicable on an industrial scale.

The invention provides a new esterase gene named Est_p1 and a recombination expression system thereof. The gene is cloned from the metagenomic library of the marginal mud 100 meters under the South China Sea. The gene is an 891bp long amino acid numbered 296, which successfully constructs a recombination expression system of a colon bacillus named pET28a-Est_p1 / BL21. The molecular weight of a target protein is 33.5 kD. With pNP-butyric ester as catalyzing substrates, the Est_p1 is proved to be a mildly alkaline medium temperature esterase. The Est_p1 has strong catalytic activity for short esters and is applicable to esterification and transesterification industries.

The invention belongs to the technical fields of biological pharmacy and biological engineering, and particularly relates to a carbonyl reductase mutant and application thereof in preparation of (R)-4-chloro-3-hydroxy-butyrate. The carbonyl reductase mutant disclosed by the invention is obtained by replacing phenylalanine at the 85th site of a sequence shown as SEQ ID NO.2 with methionine, or is obtained by replacing one or more sites except the 85th site with amino acid residues on the basis that phenylalanine at the 85th site of the sequence shown as SEQ ID NO.2 is replaced with methionine.The invention also relates to a recombinant expression vector containing the carbonyl reductase mutant gene, an engineering bacterium containing the carbonyl reductase mutant gene and a glucose dehydrogenase gene, and application of the genetic engineering bacterium in preparation of (R)-4-chloro-3-hydroxy-butyrate by asymmetric reduction of chloroacetoacetate. Compared with a wild enzyme, the carbonyl reductase mutant disclosed by the invention has the advantages that the reducing capability on chloroacetoacetate is obviously improved and the carbonyl reductase mutant has good industrial application prospect.

The invention relates to a preparation method and application of secondary modified layered double hydroxide. The preparation method comprises the following steps: performing primary modification on layered double hydroxide by using lauric acid anions, and performing secondary modification on the layered double hydroxide subjected to the primary modification by using aliphatic cationic compounds such as cetyl trimethylammonium bromide and the like. Compared with the layered double hydroxide usually subjected to only one modification process in the prior art, the secondary modified double hydroxide subjected to two modification processes has larger interlayer spacing and higher heat stability, and can be used as reinforcer in a biological polyester poly(3-hydroxybutyrate-co-4-hydroxybutyrate) material.

The invention provides a 4-(4-(3, 4-dimethoxy benzene methyl)-2-carbonyl) tetrahydrofurfuryl-2-methoxyphenol 2-amino-3-methyl butyric acid ester hydrochloride for resisting tumors, and belongs to the field of research of anti-tumor drugs. Experimental results indicate that the 4-(4-(3, 4-dimethoxy benzene methyl)-2-carbonyl) tetrahydrofurfuryl-2-methoxyphenol 2-amino-3-methyl butyric acid ester hydrochloride has obvious inhibition effect on hepatocarcinoma 22 solid tumor-bearing mice, immune organs of organisms can be protected to some extent, and immune functions of the organisms are enhanced.

The invention discloses a polymethyl polyglycol methacrylate containing a paracetamol structure as well as a preparation method and a use method thereof. The preparation method comprises the following steps of: mixing 4-nitrate ester-pacrylamide phenyl butyrate compounds, methyl acrylate compounds and methylpropenoic polyglycol acid ester compounds; polymerizing free groups under the protection of nitrogen gas; reacting at the temperature of 20-90DEG C for 1-20 hours; repeatedly precipitating and dissolving generated polymerisate by petroleum ether and tetrahydrofuran; and finally, vacuum drying. The obtained polymer has a certain analgesic function and a better anticoagulation effect.

The invention provides ginsenoside M1 n-butyrate which is a new compound with a molecular formula of C40H69O9. The molecular weight of the ginsenoside M1 n-butyrate is 692. The invention further discloses a preparation method of the compound and application of antidiabetic medicines of the compound. The ginsenoside M1 n-butyrate can resist to physiological activity of diabetes mellitus and can be used for preventing and treating the diabetes mellitus and conducting assistant treating the diabetes mellitus.

The invention discloses cannabidiol 2-butyrate and application thereof, and particularly relates to a compound as shown in a formula I, and a stereoisomer or pharmaceutically acceptable salt thereof. The cannabidiol 2-butyrate has a protection effect on nerve cell injury and skin cell injury, and can induce apoptosis of human breast cancer cells. The compound has practical application value in medicine and cosmetic production.

The invention discloses a butyrate starch preparing method and belongs to the technical fields of preparation and application of modified starch and deep processing of agricultural products. Accordingto the butyrate starch preparing method, starch serve as the principal raw material for esterification with butyric anhydride to achieve stabilization of butyric acid and small releasing of the butyric acid in gastric juice; resistant starch prepared through esterification of the butyric acid and the starch can well avoid being absorbed in small intestines, resist digestion by enzymes secreted bybrush borders, selectively release micromolecular effective load in large intestines; fermented by enteric microorganisms, the resistant starch can produce more short-chain fatty acids and probiotics, thereby improving the bioavailability of the butyric acid and expanding the application range of the starch. Compared with other butyric acid products, the butyrate starch is odorless and can be esterified into the resistant starch to convey the butyric acid to the rear end of the intestines; the butyrate starch can be fermented by the enteric microorganisms and decomposed by bacterial esteraseinto butyric acid and other short-chain fatty acids and increase the content of the probiotics, thereby belonging to probiotic products.

The invention discloses preparation methods for sitagliptin intermediates including 3-carbonyl-4-(2,4,5-trifluorophenyl)-butyrate (I) and 1-(3-trifluoromethyl-5,6-dihydro-8H-(1,2,4) triazole-(4,3-a) pyrazine-7-)-4-(2,4,5-trifluorophenyl)-1,3-butanedione (II). The preparation method for the intermediate (I) includes the steps of preparing corresponding Grignard reagent by bromoacetate and magnesium powder by means of Grignard reaction, and preparing the intermediate I by means of addition reaction between the Grignard reagent and 2,4,5-trifluoro-benzeneacetonitrile. The preparation method for the intermediate (II) includes the steps of carrying out acylation reaction between bromoacetic acid and III under the action of condensing agent so that IV is prepared, carrying out Grignard reaction between the IV and magnesium powder so that corresponding Grignard reagent V is prepared, and finally preparing the intermediate (II) via addition reaction between the Grignard reagent V and 2,4,5-trifluoro-benzeneacetonitrile in organic solvent. The preparation methods for the sitagliptin intermediates are mild in reaction conditions, simple and convenient in operation and available in raw materials and have excellent industrialized prospect.

The invention discloses a process method for synthesizing and purifying 4-chlorobutyryl chloride. The process method comprises the following steps of reacting gamma-butyrolactone and thionyl chloride in the presence of a mixed catalyst to synthesize a 4-chlorobutyryl chloride crude product and purifying the 4-chlorobutyryl chloride crude product to obtain the 4-chlorobutyryl chloride finished product of which the purity is equal to or greater than 99%, the individual impurity is less than 0.30% and the yield is equal to or greater than 90%. In the process method, exhaust gas generated in the production of 4-chlorobutyryl chloride is comprehensively utilized to produce a 30% hydrochloric acid and sodium sulfite solution and the tail material is used for producing 4-chlorobutyric acid ester. The process method is simple, convenient to operate, high in yield and purity of a product and almost free of emission of three wastes and is environmentally friendly.

An absorbent article selected from a sanitary napkin, an incontinence pad and a pantyliner, comprises a topsheet layer, a backsheet layer, optionally one or more intermediate layers enclosed between the topsheet and the backsheet, a fastening adhesive applied on said backsheet garment facing surface and a liquid fragrance or odor control composition applied on or within a layer of said absorbent article. The liquid fragrance or odor control composition comprises from 5 to 50% wt of one or more esters selected from menthyl acetate, menthyl lactate, menthyl propionate, menthyl butyrrate, cis-3-hexenyl acetate, methyl-dihydrojasmonate, methyl jasmonate, hexyl iso-butyrate, linalyl acetate, benzyl acetate, phenyl ethyl acetate and less than 5% wt of other esters. The resulting articles present reduced degradation of the fastening adhesive layer due to the migration of components of the fragrance or odor control composition into the fastening adhesive layer.

The invention provides a micro-reaction continuous flow synthesis method of levocarnitine. An existing preparation method has the defects of complicated operation, long reaction time, low yield and the like. According to the method, (R)-4-halogenated-3-hydroxybutyrate and trimethylamine are continuously subjected to quaternization and hydrolysis reaction in a micro-channel reactor in the presenceof an alkali to prepare the levocarnitine. The reaction time of the method is only several minutes, the yield is high, the technological process is easy and convenient to operate, and industrial production is easy.

The invention discloses a stain resistant and anti-drop metal flash paint for photo frames. The raw materials include: fluorocarbon resin, a carboxymethyl cellulose acetate butyrate aqueous dispersion, a waterborne polyacrylate emulsion, organic silicon resin, epoxy resin E-12, aluminum powder, hydrophobic fumed silica, composite filler, ethylene glycol butyl ether, hexamethoxymethyl melamine, dimethylethanolamine, isopropyl alcohol, sodium hexametaphosphate, butyl acetate, a silane coupling agent KH-560, a dispersant, a leveling agent BYK-331, a wetting agent, a defoaming agent, xylene and deionized water. The metal flash paint provided by the invention has excellent stain resistance and anti-drop performance.

The application relates to the technical field of fabric dyeing and finishing, and discloses a dyeing process for polyester fabrics. A polyester grey fabric is subjected to the following operations: S1: pretreatment; S2: dyeing, namely, dyeing the grey fabric after the treatment in S1, wherein a dye used for dyeing comprises the following components in parts by weight: 20-40 parts of a disperse dye, 13-27 parts of a dispersant, 4-10 parts of 2,3-butanediol, 5-14 parts of cetyl ethyl hexanoate, 3-19 parts of carboxymethyl cellulose acetate butyrate, 20-40 parts of hydroxyethylidene diphosphonicacid, 20-40 parts of octadecylisocyanate, 3-9 parts of acetic acid and 230-310 parts of water; S3: continuous cleaning, namely, continuously cleaning the grey fabric after the treatment in S2; S4: dehydration; S5: scutching; and S6: setting; and the grey fabric after the setting in S6 is a dyed polyester fabric. The color fastness of polyester fabric dyeing can be improved.

The invention discloses a preparation method of chiral 4-hydroxy-4 phenyl butyric acid ester. The method comprises that candida magnoliae (Candida magnoliae CGMCC2.1919) or saccharomyces cerevisiae (saccharomyces cerevisiae CGMCC2.399) are marked on a peptone-yeast-glucose (PYG) medium flat plate which is sterilized at the temperature of 121 DEG C for 20min, the candida magnoliae and the saccharomyces cerevisiae are subjected to stationary culture at the temperature of 25-30 DEG C for 1 day, a single colony is picked out, the single colony serves as a seed and is subjected to inclined-plane stationary culture, and after the seed grows for two days, the seed is stored at the temperature of 4 DEG C for stand-by use; and conventional cell culture and conventional bioconversion are achieved. An obtained product is high in optical purity, low in cost, safe and environment-friendly.

The invention discloses a synthesis process of 2, 2, 4-trimethyl-1, 3pentanediol dibutyrate and application of 2, 2, 4-trimethyl-1, 3pentanediol dibutyrate in interior wall latex paint. According to the method, 2, 2, 4-trimethyl-1, 3pentanediol and butyric acid are used as the raw materials for reaction in the presence of a catalyst to prepare 2, 2, 4-trimethyl-1, 3pentanediol dibutyrate. According to the invention, 2, 2, 4-trimethyl-1, 3pentanediol dibutyrate is used as a film-forming assistant to prepare paint for the first time, high film forming efficiency is achieved, the RTC-300 adding amount in a same formula can be reduced by 10% compared with RTC-16, and the boiling point of the 2, 2, 4-trimethyl-1, 3pentanediol dibutyrate is higher, therefore the environmental protection requirement of TVOC is met.

The invention discloses a precursor compound of a hexahydro-beta-acid component compound, a feed composition and an application thereof. The invention relates to a precursor compound of a hexahydro-beta-acid component compound, or a solvate of the precursor compound and a feed acceptable salt, the structure of the precursor compound is shown as a formula (I), R1 is selected from substituted or non-substituted C1-C2 alkyl, and R2 or R3 is independently selected from H and substituted or unsubstituted straight-chain or branched-chain C2-C4 carbonyl. According to the invention, the fatty acid esterification precursor compound of the hexahydro-beta acid-component compound is found to have good stability under a high-temperature condition, and the problem of degradation of effective componentscaused by high-temperature granulation of the hexahydro-beta-acid component compound in a feed processing process is solved. Further, the invention also finds that the hexahydro-beta acid component compound propionate or butyrate and the feed acceptable salt or solvate thereof in the fatty acid esterification precursor compound of the hexahydro-beta acid component compound, not only can bear the high temperature course of feed processing, but also has the equivalent effect of the hexahydro-beta acid component compound when being applied to breeding.