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7473805 |
Process for obtaining tolterodine
The process comprises reacting a compound of formula (II), where R is a hydroxyl protecting group, and the asterisk indicates an asymmetric carbon atom, with diisopropylamine in the presence of a...
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7361789 |
Dihydronaphthalene compounds, compositions, uses thereof, and methods for synthesis
The present invention relates to novel dihydronaphthalene compounds, compositions, methods for using the same, and processes for preparing the same. The present invention also relates to novel...
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7312362 |
Process for the production of di- and polyamines of the diphenylmethane series
The present invention relates to a process for the production of mixtures of di- and polyamines of the diphenylmethane series (MDA) containing less than 1,000 ppm of water and less than 200 ppm of...
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7230134 |
Method for the production of amines by reductive amination of carbonyl compounds under transfer-hydrogenation conditions
This application claims the benefit of German priority Application No. 10138140.9, filed on Aug. 9, 2001, and International Application No. PCT/EP02/08748, filed on Aug. 6, 2002. The invention...
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7183438 |
Catalysts and method for the production of amines
Disclosed are catalysts, the catalytically active mass of which contains 22 to 40 percent by weight of oxygen-containing compounds of zirconium, calculated as ZrO 2 , 1 to 30 percent by weight of...
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7176332 |
Methods for the synthesis of amines such as ephedrine and intermediates
A method for the preparation of a compound of formula (VI): in which R 2 is an optionally substituted C1–C6 alkyl; R 4 is H, OH, an optionally substituted C1–C6 alkyl or an optionally...
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7081551 |
Optically active (R)-1-(4-trifluoromethylphenyl)ethylamine
Optically active (R)-1-(4-trifluoromethylphenyl)ethylamine is a novel compound as an important intermediate for medicines and agricultural chemicals. This compound can be obtained with high optical...
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7074962 |
Catalyst holder and agitation system for converting stirred tank reactor to fixed bed reactor
This invention relates to apparatus particularly a monolith catalytic reactor in a stirred tank reactor. The stirred tank reactor including the fixed bed catalytic reactor apparatus comprises:
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7034186 |
Preparation of an amine
Process for preparing an amine by reacting a primary or secondary alcohol, aldehyde or ketone with hydrogen and a nitrogen compound selected from the group consisting of ammonia and primary and...
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6696609 |
Process for producing diamines
A process for producing diamines which comprises the steps of: (1) reacting a dialdehyde with ammonia and hydrogen in the presence of an alcohol and a hydrogenation catalyst to synthesize the...
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6696608 |
Transfer hydrogenation process
A catalytic transfer hydrogenation process is provided. The process can be employed to transfer hydrogenate N-substituted imines and iminium salts, which are preferably prochiral. The catalyst...
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6689914 |
Preparation of amines
The preparation of amines of the formula (I): R 1 R 2 CH—N R 3 R 4 (I) in which R 1 , R 2 , R 3 and R 4 , independently of one another, are hydrogen, straight-chain or branched C 1 -C 12...
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6642420 |
Method for producing aldehydes and/or alcohols or amines
A process for the preparation of aldehydes and/or alcohols or amines by reacting olefins in the liquid phase with carbon monoxide and hydrogen, a part of these gases being dispersed in the form of...
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6525222 |
Process for preparing amines
Amines are prepared by reacting aldehydes or ketones at elevated temperature under elevated pressure with nitrogen compounds selected from the group of ammonia, primary and secondary amines, and...
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6479704 |
Hydrogenation with monolith reactor under conditions of immiscible liquid phases
The present invention relates to an improved for the hydrogenation of an immiscible mixture of an organic reactant in water. The immiscible mixture can result from the generation of water by the...
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6462236 |
Preparation of amines
Amines of the formula (I) R 1 R 2 CH—NR 3 R 4 (I) where R 1 , R 2 , R 3 and R 4 are each, independently of one another, hydrogen, straight-chain or branched C 1 -C 12 -alkyl, C 3 -C 12...
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6429335 |
Reductive amination of aldehydes
The present invention relates to a process for preparing amines of formula (I) R 1 —CH 2 —NH 2 (I), wherein R 1 represents optionally branched C 1 -C 12 -alkyl, C 3 -C 8 -cycloalkyl, C 6 -C...
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6417353 |
Preparing amines
Amines are prepared by reacting aldehydes or ketones at elevated temperature under elevated pressure with nitrogen compounds selected from the group of ammonia, primary and secondary amines, and...
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6342079 |
Primary intermediate for use in oxidative hair dyeing
1-(2,5-Diaminophenyl)ethanol useful as a primary intermediate for the oxidative dyeing of hair.
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6320084 |
Process for the preparation of glyceraldehyde and derivatives thereof
The invention pertains to a process for the preparation of glyceraldehyde, or an acetal or a hemiacetal thereof, characterized in that 3-butene-1,2-diol is dissolved in a lower alkanol and is...
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6194615 |
Crosslinkers based on dibenzalacetone derivatives
The present invention relates to the composition, process of preparation, and use of novel derivatives prepared from 1,5-bis-(4'-carbomethoxyphenyl)-1,4-pentadien-3-one. These novel compositions...
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6187957 |
Preparation of amines
Amines are prepared by reacting primary or secondary alcohols, aldehydes or ketones with nitrogen compounds selected from the group consisting of ammonia and primary and secondary amines at...
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6100395 |
Reductive alkylation of secondary amines with hydrosilane
A novel process for the production of tertiary amines by reductive alkylation of second amine using hydrosilane and a Lewis acid is disclosed. The novel process has applications in the preparation...
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6072085 |
Imine hydrosilylation, uses and reagents related thereto
The method of the present invention provides a simple general route to a wide range of secondary amines.
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5977411 |
Catalytic hydrogeneration of nitrobenzene to 4-aminodiphenylamine in the presence of a hydroxyl compound and a solvent
This invention provides a method for preparing 4-ADPA by charging nitrobenzene into a reaction zone under hydrogen pressure in the presence of a strong organic base and a catalyst for...
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5973205 |
Process for the preparation of 1, 3-diaminopropane derivatives and intermediates useful in this process
A process for preparing a compound of formula (I) or an addition salt thereof and/or a solvate thereof: ##STR1## wherein R 1 , R 2 , R 4 and R 5 are each independently C 1 -4 alkoxy and R 3 is C...
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5885538 |
Method and composition for the regeneration of an aminal compound
The present invention provides a method and composition regeneration of an aminal that has previously been reacted with a sulfide selected from hydrogen sulfide and mercaptans. The method includes...
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5861535 |
Reductive alkylation process to prepare tertiary aminoaryl compounds
Tertiary aminoaryl compounds, such as N,N'dialkylaminoaryl compounds, are prepared using successive reductive steps without isolation therebetween, at high temperature and pressure. A nitroaryl...
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5817876 |
Preparation of N-alkyl-arylamines
Preparation of an N-alkyl-arylamine of the formula ##STR1## in which Ar represents an aryl radical which is optionally monosubstituted or polysubstituted by at least one of halogen and in each case...
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5817698 |
Substituted cycloalkylamine derivatives and their use as calcium channel antagonists
A method of treatment of a condition or disease related to the accumulation of calcium in the brain cells of a mammal which comprises administering to a subject in need thereof an effective amount...
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5654483 |
Process for producing alkoxy-substituted triphenylamines
A process for producing an alkoxy-substituted tri-phenylamine comprising reacting an alkoxy-substituted cyclohexanone with a diphenylamine or an aniline, while forming said cyclohexanone in the...
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5633407 |
Process for preparing substituted aromatic amines
A process for preparing substituted aromatic azo compounds is provided which comprises contacting a nucleophilic compound and an azo containing compound in the presence of a suitable solvent...
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5616799 |
Process for the preparation of glycoloylanilides
A process for the preparation of glycoloylanilide of the formula (G) ##STR1## is recited that involves reacting a nitrobenzene with hydrogen and, if desired, with a carbonyl compound, in the...
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5545751 |
Process for the preparation of 4-methoxy-2,2',6'-Trimethyldiphenylamine
A process for the preparation of 4-methoxy-2,2',6-trimethyldiphenylamine, which comprises heating and reacting 2,6-dimethylcyclohexanone and 2-methyl-4-methoxyaniline in the presence of a...
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5449829 |
Process for the preparation of diphenylamine
A diphenylamine with both the phenyl groups being substituted is prepared by reacting a phenol with ammonia in the presence of a hydrogen transfer catalyst and a cyclohexanone; or by converting a...
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5442114 |
Process for producing aromatic amide compounds
There is disclosed a process for producing an aromatic amide compound of the general formula (4), including the steps of subjecting an o-nitrophenol compound of the general formula (1) to catalytic...
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5436371 |
Process for preparing p-nitroaromatic amides and products thereof
A process for preparing p-nitroaromatic amides is provided which comprises contacting a nitrile, nitrobenzene, a suitable base and water in the presence of a suitable solvent system to form a...
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5344987 |
Process for preparing diphenylamines
Optionally substituted diphenylamines can be obtained by reacting optionally substituted anilines with optionally substituted cyclohexanones over a supported catalyst at 200°-450° C. and 0.1-20...
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5276193 |
Process for preparing N-alkyl-substituted aminophenols
A process for preparing an N-alkyl-substituted aminophenol is disclosed, comprising continuously feeding an aldehyde or a ketone to a reaction system containing an organic solvent, a catalyst for...
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5252737 |
Process for preparing N-aliphatic substituted p-phenylenediamines
A process for preparing N-aliphatic substituted p-phenylenediamine intermediates is provided which comprises contacting an aliphatic amine or substituted aliphatic amine derivative and nitrobenzene...
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5231217 |
Process for the preparation of amine-terminated compounds
The present invention is directed to a novel solvent-free process for preparing amine terminated compounds by reacting a polyfunctional acetoacetic acid ester with either ammonia or an organic...
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5202485 |
Process for preparing N-alkylaminophenols
A process for preparing an N-alkylaminophenol is disclosed, comprising subjecting an aminophenol to reductive alkylation with an aldehyde or a ketone in the presence of an organic solvent and...
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5105013 |
Method for the reductive methylation of primary amines
A process for the preparation of permethylated amines, particularly pentamethyldiethylenetriamine, by the reductive methylation of diethylenetriamine in the presence of hydrogen, a...
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5066824 |
Novel process for the preparation of amine-terminated compounds
The present invention is directed to a process for preparing amine terminated compounds by reacting a polyfunctional acetoacetic acid ester with either ammonia or an organic compound which contains...
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5053540 |
Preparation of a para-aminodiphenylamine
The present invention relates to a process for the preparation of a p-aminodiphenylamine comprising reacting N-phenylquinoneimine of the formula: ##STR1## with ammonia, ammonium hydroxide or...
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5011996 |
Process for the preparation of amines
Reaction products of oxo compounds and amines or ammonia, in which at least one substituent is aromatic and monosubstituted to trisubstituted by halogen, can be catalytically hydrogenated to the...
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4968843 |
Preparation of a N-substituted phenylenediamine
The present invention relates to a process for the preparation of a N-substituted phenylenediamine of the formula: ##STR1## comprising reacting N-phenylquinoneimine of the formula: ##STR2## with a...
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4967004 |
Process for producing N,N-diethylaminophenols
A process for producing an N,N-diethylaminophenol is disclosed, comprising subjecting an aminophenol to reductive alkylation with acetaldehyde in the presence of a solvent, a catalyst, and hydrogen...
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4952731 |
Process for producing diphenylamines or N,N'-diphenyl-phenylenediamines
Diphenylamines or N,N'-diphenyl-phenylenediamines can be obtained by heat-reacting an aniline or a phenylenediamine with preferably an excess of a phenol in an amount of 4 to 20 moles per mole of...
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4713488 |
Method for producing cycloalkyl aminophenol derivatives
Cycloalkyl aminophenol derivatives are produced by reacting o-, m- or p-aminophenol with a cycloalkanone having 5 to 12 carbon atoms in the presence of a reducing agent and preferably with the...
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