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4229592 |
Intermediate for prostaglandins and process for preparing the intermediate
The compound of the formula ##STR1## has been found to be an important and practical intermediate with the proper stereo-isomerism for the preparation of numerous prostaglandin derivatives. It can...
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4223160 |
Reaction of oxirane compounds with carboxylic acids
Niobium and ruthenium salts are employed as catalyst in the reaction of oxirane compounds with carboxylic acids. The acrylate esters produced can be used in photocurable compositions.
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4214099 |
Intermediates for synthesis of precursors for prostaglandins
A new synthesis of key prostaglandin precursors and intermediates employed in their preparation. The novel synthetic sequence of this invention is shorter and more efficient than those previously...
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4175204 |
Method of preparing E-4-acetoxy-2-methyl-2-butenal
E-4-acetoxy-2-methyl-2-butenal is prepared by: (1) preparation of an intermediate allylic halide from isoprene; and (2) reaction of the allylic halide with dimethyl sulfoxide in the presence of a...
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4171375 |
Cyclopentane derivatives and their pharmaceutical compositions
Cyclopentane derivatives of the formula: ##STR1## wherein R 1 represents hydrogen or a carboxylic acyl group, R 2 represents hydrogen or alkyl of 1 through 12 carbon atoms, and n represents an...
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4163115 |
Preparation of esters of poly-(tetramethylene ether) glycol
Esters of poly(tetramethylene ether) glycol are prepared by polymerizing tetrahydrofuran in a reaction mixture which contains, in addition to the tetrahydrofuran, and acylium ion precursor such as...
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4153805 |
Preparation of food coloring agents
A total synthesis of canthaxanthin or dinor-canthaxanthin, known food coloring agents, from pentols.
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4152520 |
3-Methyl-6-amine-3,6-dihydro-2H-pyran-2-methanol alkanoates
A novel process for the preparation of esters of 5-formyl-3-methyl-2,4-pentadien-1-ol which employs as starting materials 2-substituted-3-methyl-6-alkoxy-3,6-dihydro-2H-pyrans. Novel intermediates...
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4131739 |
Catalytic rearrangement of cyclic acetals to carboxylic esters
Cyclic acetals are rearranged to form isomeric carboxylic acid esters according to the following formula: ##STR1## wherein R is an alkyl, alkenyl, or aromatic moiety containing 1 to 12 carbon...
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4110539 |
Process for the preparation of 2,2,4-trimethyl-1,3-pentanediol diisobutyrate
This invention describes a process for the synthesis of 2,2,4-trimethyl-1,3-pentanediol diisobutyrate by the acid catalyzed cleavage and esterification of 2,4-diisopropyl-5,5-dimethylmetadioxane.
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4097517 |
Cleavage of alpha-oximinoketones, aldehydes and acetals and their nitroso isomers
The cleavage forms an ester group and a cyano group. It is effected by use of an ortho ester of a carboxylic acid, or reaction product thereof with the oximino compound or with a Lewis acid such as...
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4092339 |
Process for making polyglycidyl esters
Homopolymers and copolymers of glycidyl esters are made by reacting the acids to be esterified with the corresponding polymer of tert.-alkyl glycidyl ether under substantially anhydrous conditions...
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4087453 |
Process for obtaining glycols and glycerine or di- and triesters thereof from polyglycols and polyglycerine
A process for recovering monomeric glycols and glycerine from polyoxyalkylene glycols and polyglycerines which comprises heating the polymeric compounds together with a lower saturated...
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4069242 |
Process for preparation of β-hydroxy esters by reaction of organic carboxylic acids and vicinal epoxides
A synergistic catalytic effect is realized in the esterification reaction between an organic carboxylic acid and a vicinal epoxide by using a catalyst system comprising: (a) a compound containing...
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4069385 |
Method for the preparation of optically active allylic esters
In the preparation of olefin derivatives having an ester group at the allylic position (hereinafter referred to as "allylic ester(s)") which comprises reacting an olefin having at least one...
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4068082 |
Process for preparing esters
Esters are prepared by reaction of acyl halides and alcohols or hydroxyalkyl esters and acid halides in the presence of a tertiary amine and polar aprotonic solvents. Bis(2-methacrylatoethyl)...
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4052424 |
Production of esters from alcohols
This invention provides a process for producing carboxylic esters in high yield by contacting alkanol in vapor phase with a novel silver-cadmium alloy catalyst.
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4025540 |
Process for the production of pure carboxylic acid-1-monoglycerides
Very pure carboxylic acid-1-monoglycerides are prepared by reacting a carboxylic acid with glycidol at a temperature of 80° to 200° C. in the presence of a basic alkali metal or alkaline earth...
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4017429 |
Preparation of 2-hydroxyalkyl esters
This patent describes the catalytic promotion of the reaction of oxirane-containing compounds with carboxylic acid compounds at high, ambient, and low temperature. Specifically, this patent...
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4011251 |
Method of preparing esters of glycerol and polyglycerols and C5-C9 monocarboxylic fatty acids
The method of preparing esters of glycerol and polyglycerols with monocarboxylic fatty acids having from 5 to 9 carbon atoms consists in that glycerol and polyglycerols are reacted with...
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4005126 |
Preparation of haloalkyl esters
Haloalkyl esters are prepared by converting a saturated cyclic ether to the desired product by reaction of said ether with a carboxylic acid and a hydrogen halide.
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3996303 |
Organic halide
An organic halide (1) having the general formula: ##STR1## wherein X is a halogen atom, R 1 , R 2 , R 3 and R 4 is a hydrogen atom, a hydrocarbon group or a halogenated hydrocarbon group, R 1 ...
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3996270 |
Intermediate for Gossyplure, the sex pheromone of the pink bollworm
The sex pheromone of the pink bollworm (Pectinophora gossypiella) is an approximate 1:1 mixture of (Z,Z)- and (Z,E)-7,11-hexadecadienyl acetate; this sex pheromone, the above-identified mixture of...
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3968135 |
Chromium salt catalysts
This patent describes the catalytic promotion of the reaction of oxirane-containing compounds with carboxylic acid compounds at high, ambient, and low temperature. Specifically, this patent...
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3957857 |
Catalytic process for polyhydric alcohols and derivatives
This invention relates to the manufacture of such valuable chemicals as polyhydric alcohols, their ether and ester derivatives, oligomers of such alcohols and monohydric alcohols and their ether...
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3952066 |
Derivatives of perfluoroalkyl iodide-allyl glycidyl ether adducts
The derivatives of this application are based on the reaction of perfluoroalkyl iodopropyl glycidyl ethers and their dehydroiodination products, the perfluoroalkyl allyl glycidyl ethers, with...
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3923874 |
Continuous production of esters of glycols or their monoethers with lower fatty acids
Continuous production of substantially or wholly water-soluble esters of glycols or their monoethers with lower fatty acids by reaction of a glycol of the formula (I): in which A is ethylene,...
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3894093 |
Process for the manufacture of addition products of ethylene oxide and compounds containing mobile hydrogen
Polyethylene glycol ethers are obtained in great purity and high yields when liquid ethylene oxide is fed into a turbulent stream of the catalyst-containing starting material and the reaction...
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3873602 |
BETA HYDROXY ESTERS
A method for promoting the reaction of at least one oxirane compound, e.g., ethylene oxide, with at least one organic carboxylic acid such as terephthalic acid which method is carried out in a...
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3859336 |
PROCESS FOR THE PRODUCTION OF GLYCOL ESTERS
A process for the preparation of vicinal glycol esters which comprises reacting an alkanoic acid with an olefin in the presence of a palladium catalyst and a nitrate-nitrite oxidation carrier.
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3789065 |
PROCESS FOR PREPARING VICINAL GLYCOL ESTERS FROM OLEFINS
In the process for preparation of vicinal glycol esters from an olefin by reacting the olefin in the liquid phase with molecular oxygen and a carboxylic acid in the presence of a catalyst within an...
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3720705 |
PROCESS FOR THE MANUFACTURE OF β-ACETOXYPIVALIC ALDEHYDE
Process for the manufacture of β-acetoxypivalic aldehyde by the dosed ddition of β-hydroxypivalic aldehyde and/or its dimer in an acetic acid solution to a boiling mixture of acetic acid, an...
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3715389 |
PROCESS FOR PREPARING GLYCOL ESTERS FROM OLEFINICALLY UNSATURATED COMPOUNDS
Esters of vicinal glycols are prepared by reacting olefinically unsaturated compounds with molecular oxygen and monobasic carboxylic acids in the presence of a liquid phase reaction medium within...
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3692823 |
METHOD FOR PREVENTING EXPLOSIONS
In a process in which a gas comprising oxygen is bubbled through a liquid reaction medium contained in a reaction vessel, with a flammable or potentially flammable vapor being contained in the...
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3689533 |
PRODUCTION OF CARBOXYLIC ACIDS AND ESTERS
The present invention relates to a process for the preparation of carboxylic acids and esters, specifically by the reaction of alcohols and carbon monoxide in the presence of a supported catalyst...
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3674835 |
PROCESS FOR THE PRODUCTION OF GLYCOL ESTERS OF CARBOXYLIC ACIDS
The invention relates to a process for the production of glycol esters of carboxylic acids by reaction of a water-soluble alkylene oxide with an aqueous solution of an alkali metal or alkaline...
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3673226 |
SYNTHETIC LUBRICANTS
Elimination of water from trimethylolpropane forms a mixture containing a substantial amount of di-trimethylolpropane. Esterification of the mixture with monobasic aliphatic carboxylic acids...
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3668239 |
PROCESS FOR PREPARING GLYCOL ESTERS FROM OLEFINICALLY UNSATURATED COMPOUNDS
Glycol esters derived from olefinically unsaturated compounds are prepared by contacting the olefinically unsaturated compound and molecular oxygen in a carboxylic acid medium in the presence of a...
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3665047 |
METHOD FOR THE SIMULTANEOUS PREPARATION OF A DIOLEFIN AND AN OLEFIN
A method of preparing a diolefin and an olefin or an alkenyl benzene hydrocarbon simultaneously from more highly saturated hydrocarbons, said latter respectively having the same carbon structure as...
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3665015 |
PROCESS FOR PREPARING 3-HYDROXY-2-METHYL-4-PYRONE
3-HYDROXY-2-METHYL-4-PYRONE (MALTOL) IS PREPARED BY (1) REACTING β, δ-DIOXOCAPROALDEHYDE DIALKYL ACETAL WITH LEAD TETRAACETATE, (2) EITHER (A) PYROLYZING THE PRODUCT OF STEP (1), OR (B) TREATING...
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3539518 |
LOW FOAM SURFACTANTS
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3530154 |
PROCESS FOR THE CONTINUOUS PREPARATION OF ADDITION PRODUCTS OF ETHYLENE OXIDE TO CARBOXYLIC ACIDS
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3510511 |
PROCESS FOR THE PRODUCTION OF ORGANIC ESTERS
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3496238 |
METHOD OF PREPARING LOW MOLECULAR WEIGHT ISOTACTIC POLYPROPYLENE GLYCOLS AND CATALYST SYSTEM THEREFOR
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3479392 |
PRODUCTION OF UNSATURATED ETHERS AND ESTERS
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3478111 |
METHOD AND APPARATUS FOR CONTINUOUSLY MONITORING THE PROGRESS OF CERTAIN REACTIONS
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3475461 |
OXIDATION OF OLEFINIC COMPOUNDS
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3454596 |
ADDITION REACTIONS TO CARBONYL COMPOUNDS
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3444238 |
ISOMERIZATION OF 5-METHYLMETADIOXANES
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3442930 |
ALDEHYDE-ESTER COMPOUNDS
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