52 results about "Propionic acid ester" patented technology

Described are trimethylcyclohexenylcyclopropyl ketones having the structure: wherein one of the dashed lines is a carbon-carbon double bond and the other of the dashed lines is a carbon-carbon single bond, uses thereof in augmenting, enhancing or imparting aromas in or to perfume compositions, colognes and perfumed articles, and mixtures of same with 3-methyl-1-phenylpentanol-5 and / or butanoylcyclohexane derivatives and / or acetic or propionic acid esters of o-methylphenyl isopropanol.

The invention provides a preparation method of 3-(methyl alkoxy phosphoryl) propionic acid ester compound (I). Methyl ferro phosphoric acid dialkyl ester (III) and acrylic acid (II) are taken as raw materials to react under anhydrous and anaerobic conditions at 0 DEG C to 30 DEG C; and the reaction process is shown as the formula, wherein, R1 in the formula is equal to R2 and is methyl or ethyl. The product yield of the method can reach 96% and the operation is simple with no generation of three wastes, thus being beneficial to industrial amplifying production.

The invention discloses a quick-drying type highly damped oiliness damper paint, which comprises the following steps: allocating oiliness solution with one or several poly-propionic ester resin, polyurethane resin and alcohol acid resin; adopting the oiliness solution as host; setting chip layer structure as layered metasilicate and so on inorganic salt; making calcium carbonate material with light calcium carbonate and heavy calcium carbonate with miscellaneous number; using the structure and the calcium carbonate material as filler; setting aids with combustion inhibitor, disperser, defoamer and thickener; allocating with 0-7 wt combustion inhibition, 0-2 wt disperser, 0-3 deformer and 0-3 thickener as aids; adding into the aids; setting mass ratio of host and filler and aids at 100 : 40-120 : 1-10 wt; stirring; getting the paint.

The invention provides methods for preparing polymers bearing a terminal propionic acid. The method involves first reacting a water soluble and non-peptidic polymer comprising at least one hydroxyl group with a tertiary alkyl acrylate in the presence of a catalyst to form a propionic acid ester of the polymer, wherein the polymer has a weight average molecular weight of at least about 10,000 Da; and then treating the propionic acid ester of the polymer with a strong acid to form a propionic acid of the polymer.

The invention relates to propionic acids, propionic acid esters, and related compounds, pharmaceutical compositions containing these compounds, and methods of using these compounds for the treatment of various diseases or conditions, including but not limited to diseases and / or conditions of Central Nervous System (CNS).

The invention provides methods for preparing polymers bearing a terminal propionic acid. The method involves first reacting a water soluble and non-peptidic polymer comprising at least one hydroxyl group with a tertiary alkyl acrylate in the presence of a catalyst to form a propionic acid ester of the polymer, wherein the polymer has a weight average molecular weight of at least about 10,000 Da; and then treating the propionic acid ester of the polymer with a strong acid to form a propionic acid of the polymer.

According to one embodiment, a nonaqueous electrolyte battery is provided and the nonaqueous electrolyte battery comprises a positive electrode, a negative electrode, and a nonaqueous electrolyte. Thepositive electrode includes a layer containing a positive electrode active substance, the layer containing the positive electrode active substance contains lithium-manganese compound oxide particleshaving a spinel-type crystal structure and the lithium-cobalt compound oxide particles, and the negative electrode contains a titanium-containing oxide. The nonaqueous electrolyte contains a propionicacid ester and satisfies the formulas 0.8 <= p / n < =1.2 and 1< =w / s <= 60, wherein p is the capacity per unit surface area [mAh / cm2] of the positive electrode; n is the capacity per unit surface area[mAh / cm2] of the negative electrode; w is the propionic acid ester content of the nonaqueous electrolyte and is within a range of 10 to 60 wt%; and s is the average particle diameter [Mu m] of the lithium-manganese compound oxide particles.

The present invention has its object to provide a method of producing an erythro- or threo-2-amino-3-hydroxypropionic acid ester, and so forth. The present invention relates to: a method of asymmetrically reducing an N-2-amino-3-oxopropionic acid ester by allowing cells of a microorganism to act thereon; a polypeptide having an activity of asymmetrically reducing a carbonyl compound to give an optically active alcohol, which is isolated from a microorganism belonging to genus Brevundimonas; a DNA coding for the polypeptide; and a transformant producing the polypeptide. The invention also relates to a method of producing an optically active alcohol by reducing a carbonyl compound with the help of the polypeptide or the transformant.

The invention relates to a preparation method of high-performance acrylate-type resin. The preparation method includes the steps of (1) adding water, sodium dodecyl benzene sulfonate, fatty alcohol-polyoxyethylene ether and 2-acrylamide-2-methylpropanesulfonic acid; (2) increasing the temperature and stirring the materials and adding a monomer A; (3) performing emulsification for 40 min, increasing the temperature to 70 DEG C and feeding backflow water; (4) increasing the temperature to 85 DEG C and adding a potassium persulfate solution; (5) performing a reaction for 2 h, adding fluticasone propionic ester, performing stirring reaction to obtain a core-layer emulsion; (6) adding dropwisely a monomer B and the potassium persulfate solution to the core-layer emulsion, and performing a stirring reaction after dropwise addition; (7) decreasing the temperature to 50 DEG C, adding the sodium dodecyl benzene sulfonate and the fatty alcohol-polyoxyethylene ether, and performing the reaction for 70 min; and (8) performing a reaction at 70 DEG C for 1 h and adding ammonia water to regulate the pH value to 7-8 to prepare the acrylate-type resin. The preparation method not only greatly improves wear resistance of the acrylate-type resin but also improves the defect of yellowing of a film formed by an emulsion of the acrylate-type resin.

The invention discloses a novel chiral resolution method for obtaining a single enantiomer of 2-(4-methylphenyl)propionic acid, namely a method for synthesizing a single enantiomer of 2-(4-methylphenyl)propionic acid by enzymatically catalyzed stereoselective hydrolysis of 2-(4-methylphenyl)propionate enantiomers. Based on high selectivity and high catalytic efficiency of candida rugosa lipase, 2-(4-methylphenyl)propionate enantiomers are hydrolyzed to obtain (+)-2-(4- methylphenyl)propionic acid with high optical purity; based on the interaction of cyclodextrin to 2-(4-methylphenyl)propionateenantiomers, the conversion rate of 2-(4-methylphenyl)propionate is improved; the conversion rate of a substrate and the optical purity of the product can be as high as 40.76% and 96.24%, respectively, and the stereoselectivity E is as high as 145; the method overcomes the problems of low optical purity, low yield, environmental pollution and the like of general resolution technology, and can achieve high conversion rate and high selectivity of hydrolysis of 2-(4-methylphenyl)propionate enantiomers, so as to realize non-toxic, harmless and environmental-friendly resolution of chiral compoundsand mild reaction conditions; and the aims of simple equipment, easy operation, low cost and the like are achieved.

The invention relates to compounds of the following formula:and their pharmaceutically acceptable salts, pharmaceutical compositions containing this compounds, and methods of using this compound for the treatment of various diseases or conditions, including but not limited to diseases and / or conditions of, or involving, the Central Nervous System (CNS), including schizophrenia adrenoleukodystrophy, mitochondrial diseases (e.g. Leigh syndrome, Alpers' disease, and MELAS), Huntington's disease, trichotillomania, HIV-associated neurocognitive disorder, hypoxic-ischemic encephalopathy, drug craving, and drug addiction.

The invention provides methods for preparing polymers bearing a terminal propionic acid. The method involves first reacting a water soluble and non-peptidic polymer comprising at least one hydroxyl group with a tertiary alkyl acrylate in the presence of a catalyst to form a propionic acid ester of the polymer, wherein the polymer has a weight average molecular weight of at least about 10,000 Da; and then treating the propionic acid ester of the polymer with a strong acid to form a propionic acid of the polymer.

The invention provides a method for directly preparing levulinate from cellulose, the main steps of which are: under the action of a metal salt catalyst, cellulose is subjected to alcoholysis in a mixed solvent of alcohol and water to directly obtain levulinic acid ester. The metal cation of the metal salt used in this method is Al 3+ , Sn 4+ or Fe 3+ At least one of them; the heating methods involved in the method include microwave heating and oil bath heating. The method provided by the invention can efficiently and selectively convert cellulose into levulinate, not only has mild reaction conditions, short reaction time, and easy recovery of the catalyst, but also avoids the use of liquid acid or solid acid catalysts, and has few side reactions. Low cost and friendly to the environment.

The invention relates to a production method of 3-hydroxypropionate, which mainly solves the problems of complex catalyst preparation and low activity in the prior art. The present invention is by adopting the method for producing 3-hydroxypropionate, under the presence of cobalt salt, ligand and cocatalyst, ethylene oxide, synthesis gas and alcohol, reaction obtains 3-hydroxypropionate; Wherein, described cobalt salt It is one of cobalt phosphate, cobalt sulfate, cobalt acetate, cobalt chloride, cobalt carbonate, cobalt nitrate, cobalt hydroxide, cobalt oxide, cobalt oxalate, the ligand is an N-containing ligand, and the cocatalyst is a metal The technical solution of powder or carrier loading metal element better solves this technical problem and can be used in the industrial production of 3-hydroxypropionate.

The invention discloses a multifunctional coating which comprises a component A and a component B. The component A comprises 1-6 parts of plant methyl acrylate, 10-60 parts of plant phosphate ester, 10-60 parts of plant polypropyl ether, 1-6 parts of plant butyl methacrylate, 1-6 parts of plant 2-ethylhexyl acrylate, 1-6 parts of plant 2-ethylhexyl methacrylate and 1-6 parts of plant acrylic acid. 1-6 parts of plant allyl polyoxyethylene ether ammonium sulfate, 1-6 parts of plant potassium persulfate, 1-6 parts of plant ammonia water, 1-6 parts of plant isomeric alcohol polyoxyethylene ether, 1-6 parts of plant lauryl sodium sulfate, 1-6 parts of mineral acrylic copolymer, 1-6 parts of plant triethylene glycol ether-di (3-tertiary butyl-4-hydroxyl-5-methyl phenyl) propionate and 100-600 parts of water. The component B is prepared from 100 to 600 parts of mineral iron aluminate cement, 100 to 600 parts of 200-mesh magnesium oxide 85 powder, 100 to 600 parts of 50-mesh quartz sand, 10 to 60 parts of mineral heavy calcium carbonate powder, 10 to 60 parts of mineral kaolin and 1 to 6 parts of mineral sodium lignin sulfonate. The coating is safe and can be widely applied to the technical field of coatings.