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6608229 |
Oxidation of polysaccharides with nitroxyls
A simplified process for oxidizing starch and other polysaccharides in an aqueous solution or suspension using hypochlorite in the presence of a catalytic amount of a nitroxyl compound is...
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6538132 |
Process for regenerating periodic acid
The invention pertains to a process for the regeneration and recovery of periodate from a spent iodate solution, by reacting the iodate with at least an equimolar amount of hypohalite, and carrying...
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6518419 |
Process for selective oxidation of primary alcohols
Primary alcohols, especially in carbohydrates, can be selectively oxidized to aldehydes and carboxylic acids in a low-halogen process by using a peracid in the presence of a catalytic amount of a...
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6440327 |
Polymers and use thereof as scale inhibitors
Compositions and methods for inhibiting scale are provided. Pursuant to the present invention, a composition for inhibiting scale is provided that includes a carbohydrate polymer having both...
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6150554 |
Oxidation process using periodic acid
The present invention relates to an oxidation which converts a primary or secondary alcohol of Formula II: ##STR1## to an acid or ketone of Formula I: ##STR2## with periodic acid and a catalytic...
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6127573 |
Oxidaton of primary alcohols to carboxylic acids with a TEMPO catalyst using NaClO2 and NaClO
The present invention relates to a TEMPO-catalyzed oxidation of primary alcohols, RCH2 OH to corresponding carboxylic acids, RCOOH in the presence of catalytic in the presence of catalytic amount...
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5886218 |
Process for preparing 4, 5-dichloro-2-methylbenzoic acid
The present invention relates to a process for preparing 4,5-dichloro-2-methylbenzoic acid and also its salts in high yields and in high purities by reacting 3,4-dichlorotoluene with acetyl...
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5608107 |
Preparation of alkoxyalkanoic acids
A process for preparing an alkoxyalkanoic acid by reacting the corresponding alkoxyalkanol with a resin-supported stable free radical nitroxide in the presence of a chlorine-containing oxidant and...
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5481032 |
Process for the preparation of halogenated benzoic acids
A process for the preparation of halogenated benzoic acids of formula (1): ##STR1## in which R1, R2, R3, R4 and R5 are hydrogen, fluorine, chlorine or bromine atoms or C1 -C6 -alkyl, C1 -C6...
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5434302 |
Method for the preparation of optically active 2-aryl alkyl aldehydes and formation of 2-aryl-alkanoic acids therefrom
The present process is directed to preparing optically active 2-aryl alkyl aldehydes by various processes through the use of an optically active amine, (-)-2'-amino-3-phenyl propane. The aldehyde...
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5296636 |
Preparation of 2,4,6-trimethylbenzoic acid
A process for the preparation of 2,4,6-trimethylbenzoic acid of the formula I ##STR1## in which α-chloro-2,4,6-trimethylacetophenone is reacted with an alkali hydroxide solution and chlorine in ...
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5254796 |
Oxidation process
The invention relates to an ecologically favorable process for the hydrolytic decomposition of halogen-containing compounds of the formula CX4 or CHX3 or mixtures of these compounds, in which X as...
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5221766 |
Method for producing α-(p-isobutylphenyl) propionic acid
A method for producing α-(p-isobutylphenyl)-propionic acid with a high selectivity and high purity. The method is characterized in that α-(p-isobutylphenyl)propionaldehyde is oxidized at t...
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5183926 |
Process for the preparation of aromatic dicarboxylic acids and aromatic hydrocarbons
Aromatic dicarboxylic acids of the formula ##STR1## in which R1, R2, m, n, and X have the meaning mentioned in the description,can be prepared from the bisphenols, on which they are based, of the...
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5097061 |
Method for preparing α-(4-isobutylphenyl)propionic acid or its precursor
A method for preparing α-(4-isobutylphenyl)propionic acid or its precursor is here disclosed which comprises a step A of forming p-isobutylstyrene from p-isobutylethylbenzene and a step B of ...
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5072037 |
Process for the preparation of 2-(4-chlorophenyl)-3-methylbutyric acid
A process for the preparation of 2-(4-chlorophenyl)-3-methylbutyric acid from 4-chlorobenzaldehyde by conversion of the benzaldehyde to 3-(4-chlorophenyl)-2-methylpropenal,...
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5068408 |
Hypochlorous acid as a reagent for the oxidation of organic compounds in two phase systems
A process for oxidizing an organic compound selected from an aliphatic, aromatic, aliphatic/aromatic, cycloaliphatic and heterocyclic alcohol, thiol, sulfide, aldehyde, amine, amide, ketone, acid,...
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4814494 |
Method for producing (aryl substituted) carboxylic acid or its salt
An effective method for producing highly pure (aryl substituted)carboxylic acid or its salt which comprises the steps of: (I) oxidizing (aryl substituted)aldehyde in an acidic phase in the presence...
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4749804 |
Preparation of stereoisomers of ketals
Pharmaceutically useful optically active α-arylalkanoic acids or esters, ortho esters, or amides thereof are stereoselectively prepared by contacting an aryl magnesium Grignard reagent with an ...
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4684733 |
Process for the preparation of intermediates of derivatives of pyrrolidine and piperidine
An improved process for the preparation of certain antiarrhythmic agents in which a carbon atom of a piperidine or pyrrolidine ring is bonded directly or through a methylene group to the nitrogen...
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4617396 |
Process for the preparation of derivatives of piperidine
Processes for the preparation of the antiarrhythmic agent 2,5-bis(2,2,2-trifluoroethoxy)-N-(2-piperidylmethyl)benzamid
e.
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4599445 |
Process for benzophenone tetracarboxylic acid
A method is described for autoxidizing particular ortho-dialkyl substituted aromatic compounds using a particular type of solvent which gives rise to the formation of 3-alkanoyloxyphthalide...
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4485247 |
3-Alkanoyloxyphthalides
A method is described for autoxidizing particular ortho-dialkyl substituted aromatic compounds using a particular type of solvent which gives rise to the formation of 3-alkanoyloxyphthalide...
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4474990 |
Preparing p-phenoxy benzoyl compounds
Substantially pure p-phenoxybenzoyl compounds are prepared by reacting diphenyl ether and an appropriate acyl compound in the presence of hydrogen fluoride. The resulting p-phenoxyaryl alkyl ketone...
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4393232 |
Preparation of 3-bromo-4-fluoro-benzoic acid
A process for the preparation of 3-bromo-4-fluorobenzoic acid of the formula ##STR1## comprising reacting fluorobenzene of the formula ##STR2## acetyl chloride in the presence of an acylation...
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4323700 |
Process for preparing benzophenone derivatives
A process is described for preparing benzophenone derivatives of a high purity in an extremely high yield from 3-phenylphthalide derivatives with the use of at least one oxidizing agent.
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4225694 |
Selective catalytic oxidation of unsaturated alcohols to carbonyl compounds
Primary and secondary unsaturated alcohols are converted to their corresponding aldehydes and/or carboxylic acids and ketones respectively with alkali metal (per) halate, preferably sodium...
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4111982 |
Coproduction of acetic and propionic acids
An improved process for the simultaneous and continuous production of acetic and propionic acids in a single reactor wherein the rate of propionic acid production is enhanced over that which...
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4079075 |
Primary alkyl esters as mediums for oxidations by phase-transfer catalyzed hypohalites
The process of oxidizing organic compounds by dissolving the organic compound in a water-immiscible, inert organic solvent and contacting same with an aqueous hypohalite ion in the presence of a...
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3994897 |
Process for the manufacture of carboxylic acids from methyl ketones
Carboxylic acids are manufactured by reaction of methyl ketones with hypochlorites in the presence of bromine, iodine, haloamides, and/or polymerization inhibitors. The products are starting...
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3683040 |
CERTAIN BI- OR TRICYCLOALKYL METHYLBENZENES
Compounds such as wherein R3 is bicycloalkyl (C7 to C10) or tricycloalkyl (C10 to C11), useful as intermediates for making N-acylcyclohexylamines of the formula: ##SPC1## Wherein R is hydrogen,...
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3530189 |
PROCESS FOR THE PREPARATION OF 4'-NITRO-4-ACETYL-OR 4-CHLOROACETYL-DIPHENYL
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3317591 |
Preparation of[4-(2-alkylidenealkanoyl)phenoxy]-alkanoic acid by oxidation
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3268294 |
Process for producing selenium dioxide
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3230200 |
Synthetic linear condensation polyesters suitable for making wash-wear fabrics
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3135767 |
Reddish liquid product obtained from a petroleum solvent extraction of oxidized friedel-crafts acylation derivatives of aromatic petroleum extracts
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3104258 |
Novel synthesis of amino acids
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3014961 |
Process for the preparation of terephthalic acid and isophthalic acid
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2999879 |
Process for the production of aromatic carboxylic acids
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2969385 |
Dibenzoates
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2861102 |
Continuous process for producing alpha ethylcinnamic acid
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2821557 |
Process of preparing dibromo-di-perinaphthindandion
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