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7626057 |
Production of xylylenediamines
A method of producing xylylenediamine by a two-stage hydrogenation of a starting phthalonitrile in a solvent. The main steps of the method are a hydrogenation step 1 and a hydrogenation step 2. In...
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7592488 |
Method for preparing optically active amines
The present invention relates to a method of preparing optically active amines and chiral amines prepared thereby. The method includes reacting an amine compound, a metal catalyst, a biocatalyst...
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7588721 |
Method for storing xylylenediamine
A solid xylylenediamine solidified in a container is extremely excellent in storage stability as compared with a liquid xylylenediamine, and is less degraded by discoloration even when stored in an...
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7442794 |
Rearranged pentanols, a process for their production and their use as anti-inflammatory agents
The invention relates to the compounds of formula I,
a process for their production and their use as anti-inflammatory agents.
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7381845 |
Nitrile hydrogenation on heterogeneous catalysts in the presence of ionic liquids
A process for hydrogenating nitrile functions present in organic compounds over at least one heterogeneous catalyst, in which the hydrogenation is carried out in the presence of an ionic liquid, is...
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7368610 |
Preparation of xylylenediamine (XDA)
A process for preparing xylylenediamine, comprising the steps of ammoxidizing xylene to phthalonitrile and hydrogenating the phthalonitrile, which comprises contacting the vaporous product of the...
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7339080 |
Method for the production of diaminoxylene by continuous hydrogenation of liquid phthalonitrile
A process for preparing xylylenediamine by continuously hydrogenating liquid phthalonitrile over a heterogeneous catalyst in the presence of liquid ammonia in a reactor, which comprises mixing a...
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7291754 |
Process for the catalytic hydrogenation of a nitrile
Process for the catalytic hydrogenation of a nitrite in the presence of an amine and a catalyst wherein the catalyst is a liquid-rinsed Raney-type catalyst contacted with a hydroxide prior to...
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7265237 |
Chiral monophosphites as ligands for asymetrical synthesis
Certain chiral monophosphites and their monothio derivatives are suitable as ligands in the asymmetrical transition-metal-catalyzed hydrogenation, hydroborination and hydrocyanation of prochiral...
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7256312 |
Method for producing aminoalkoxy benzylamines and aminoalkoxy benzonitriles as intermediates
The invention relates to a process for preparing 4-[aminoalkoxy]benzylamines of the general formula (I)
by catalytically hydrogenating 4-[aminoalkoxy]benzonitriles of the general formula (II)
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7256311 |
Process for hydrogenating unactivated imines using ruthenium complexes as catalysts
A process is provided for the hydrogenation or asymmetric hydrogenation of dialkyl, alkylalkenyl and dialkenyl imines of formula (II) to provide amines of formula (III), wherein, (i) R 1 and R 2 ...
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7244860 |
Substituted ferrocenyldiphosphines as ligands for homogeneous hyrogeneration catalysts
Compounds of the formula (I), in which R 1 is C 1 -C 4 alkyl, C 6 -C 10 aryi or C 7 -C 11 , aralkyl, R 2 is an open-chain or cyclic secondary amino group, and R is a radical of the formula in...
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7196223 |
Higher alcohols for solvents in amine production
A nitrile-containing mixture, which includes a nitrile dissolved in a higher alcohol solvent, and hydrogen are fed to a reactor containing a catalyst. An amine is produced by hydrogenating the...
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7193112 |
Process for the production of aromatic amines by heterogeneously catalysed hydrogenation
The invention describes a process for the production of aromatic amines by the catalytic hydrogenation of aromatic nitro compounds, with the process being characterized by at least one catalytic...
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7154006 |
Preparation of fluorinated anilines
The invention relates to a process for preparing fluorinated anilines starting from the corresponding chlorinated anilines, and also to the use of the fluorinated anilines.
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7129378 |
Method of preparing amine stereoisomers
This invention provides a method of preparing amine stereoisomers, which comprises stereoselectively reducing a sulfinylimine that bears on the sulfinyl group a residue of an alcohol, thiol or...
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7119230 |
Process for production of xylylenediamine and/or cyanobenzylamine
In the process of the present invention, xylylenediamine and/or cyanobenzylamine is produced by a catalytic liquid-phase hydrogenation of a phthalonitrile compound. The liquid-phase hydrogenation...
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7056485 |
Continuous hydrogenation process
The invention is directed to a continuous hydrogenation process in which a hydrogenable compound is dissolved in a working solution with hydrogen and a heterogeneous catalyst. At least part of the...
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6894189 |
Methods of preparing didesmethylsibutramine and other sibutramine derivatives
This invention encompasses novel methods of preparing sibutramine and sibutramine derivatives, and stereomerically pure sibutramine derivatives in particular. Examples of sibutramine derivatives...
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6894192 |
Process for production of xylylenediamine
In the process of the present invention for producing a xylylenediamine by a liquid-phase hydrogenation of a dicyanobenzene in the presence of a catalyst, the catalyst having its activity decreased...
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6894190 |
Process for producing optically active 3,3,3-trifluoro-2-hydroxy-2-methylpropionic acid, and salt thereof
There are disclosed imine compounds of formula (7) and (11), and processes for preparing the same:
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6881864 |
Production method of xylylenediamine
In the method of the present invention, xylylenediamine is produced by a two-stage hydrogenation of a dicyanobenzene compound. In a first stage (a), the hydrogenation is performed until a...
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6822118 |
Process for the hydrogenation of imines
A process for the hydrogenation of imines with hydrogen under elevated pressure in the presence of iridium catalysts and with or without an inert solvent, wherein the reaction mixture contains an...
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6790996 |
Supported cobalt catalysts for nitrile hydrogenations
The invention relates to a process for preparing primary amines by hydrogenating nitrites in the presence of a catalyst comprising cobalt and optionally, in addition, nickel and also at least one...
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6790994 |
Methods for hydrogenating nitrile functions into amine functions
The present invention relates to a process for the hydrogenation of nitrile functional groups to amine functional groups. It relates more particularly to a process for the complete or partial...
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6737554 |
Process for the production of a dinitronaphthalene isomer mixture with a high proportion of 1,5-dinitronaphthalene
The present invention relates to a process for the production of a dinitronaphthalene isomer mixture, in which naphthalene and/or 1-nitronaphthalene is reacted with nitric acid in the presence of a...
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6706217 |
Liquid antiozonants and rubber compositions containing same
Liquid antiozonant mixtures obtained from the process comprising simultaneously reacting at least one unsubstituted and/or substituted paraphenylenediamine compound with a carbonyl compound mixture...
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6677486 |
Hydrogenation of nitriles over Raney catalysts
Nitriles are hydrogenated to primary amines over an activated, alpha-Al 2 O 3 -containing, macroporous Raney catalyst based on an alloy of aluminum and at least one transition metal selected from...
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6646163 |
Method for producing high purity xylylenediamine
In a method for producing xylylenediamine by hydrogenating phthalonitrile separated from a gas produced by causing xylene to react with ammonia and oxygen-containing gas in the presence of a...
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6528687 |
Ruthenium complexes and their use in asymmetric hydrogenation
A process for the preparation of an enantiomerically enriched chiral amine of formula (10), or the opposite enantiomer thereof, from an inline of formula (11) wherein (i) R 1 is aryl, R 2 is...
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6525223 |
Preparation of secondary amines from nitriles
Secondary amines of the formula (II) (X—CH 2 —) 2 NH (II) where X is a C 1-20 -alkyl, C 2-20 -alkenyl or C 3-8 -cycloalkyl group which may be unsubstituted or substituted by C 1-20 -alkyl, C...
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6521564 |
Modification of a hydrogenation catalyst
A process for the modification of a hydrogenation catalyst of the Raney nickel, Raney cobalt, nickel-on-carrier or cobalt-on-carrier type, which process includes treating the hydrogenation catalyst...
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6506940 |
Process for converting stereoisomers of sertraline into sertraline
A process for converting the cis (1R, 4R), trans (1S, 4R), and trans (1R, 4S) stereoisomers of sertraline into sertraline comprises, starting with an initial reaction mixture which contains at...
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6500985 |
Process for producing alpha-aminoketones
An amino group of an α-amino acid ester is protected as an imine, and it is then reacted with a halomethyllithium to obtain an N-protected-α-aminohalomethylketone. Further, this...
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6476267 |
Process for producing aromatic primary amine by low-pressure
A method for producing an aromatic primary amine, characterized by hydrogenating an aromatic nitrile at a low partial pressure of hydrogen in a heterogeneous system comprising a non-reductive polar...
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6476269 |
Method for producing xylylenediamine
A method for producing xylylenediamine by hydrogenating phthalonitrile synthesized through ammoxidation of xylene, wherein phthalonitrile is trapped in an organic solvent (A) by bringing a gas...
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6476270 |
Waste-free process for manufacture of amides and amines from carbonium ion precursors and nitriles
A method for preparation of an amine from a carbonium ion precursor and a nitrile. The method comprises the steps of: (a) contacting the carbonium ion precursor and the nitrile with aqueous...
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6455023 |
Metallic catalysts for non-neutral liquid media
Carbon monolith-supported catalysts with high leach resistance used in catalytic applications involving strong acidic and basic conditions in a pH range of from 0 to 6.5 and from 7.5 to 14, are...
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6429336 |
Process for recovering toluene diamine from toluene diisocyanate distillation residues
Residues from the distillation of a toluene diamine phosgenation mixture are hydrolyzed by mixing them with water and subjecting the mixture to a temperature of 200-350 ° C. The hydrolysis is...
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6420613 |
Process for preparing reductants of unsaturated organic compounds by the use of trichlorosilane and reducing agents
A method of preparing a reduced product by efficiently reducing an unsaturated organic compound by using, as a reducing agent, a trichlorosilane which is industrially cheaply available and is easy...
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6350911 |
Method for producing amines
The invention relates to a process for the preparation of amines by hydrogenation of nitro compounds, which comprises carrying out the hydrogenation in a vertical reactor whose length is greater...
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6284925 |
Use of ferrocenyl ligands for catalytic, enantioselective hydrogenation
The use of the ligands and complexes of general formula I and II for catalytic, enantioselective hydrogenation. ##STR1##
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6248925 |
Selective reductive amination of nitriles
This invention pertains to an improvement in a process for the formation of secondary or tertiary amines by the catalytic reductive amination of a nitrile with a primary or secondary amine and,...
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6222074 |
Process for preparation of 4,6-diaminoresorcinol or salts thereof
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6153784 |
Removal of halides from halide-containing nitrile mixtures
Halides are removed from halide-containing nitrile mixtures by (a) thermally treating the halide-containing nitrile mixture, (b) subsequently adding a base to the thermally treated nitrile...
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6137011 |
Process for the preparation of bistrifluoromethylbenzylamines
Bistrifluoromethylbenzylamines are obtained in a simple manner in high purities and with good yields by catalytic hydrogenation of the corresponding bistrifluoromethylbenzonitriles if the process...
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6124504 |
Process for preparing 4-hydroxyanilines
The application describes a process for preparing 4-hydroxyanilines by the reaction of phenols with diazonium salts and subsequent reduction.
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6054617 |
Nitro compound-reducing process
The invention concerns a process for the reduction of nitro groups to amino groups, characterized that a nitro compound is reacted with hydrogen in the presence of an aqueous solution of a...
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5994584 |
Process for the preparation of 4-aminodiphenylamine
4-Aminodiphenylamines are prepared by hydrogenating nitrosobenzene or mixtures of nitrosobenzene and nitrobenzene with hydrogen in the presence of fluorides and heterogeneous catalysts in inert...
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5986139 |
Process for the hydrogenation of imines
A process for the preparation of primary or secondary amines by hydrogenation of imines with hydrogen at elevated pressure and in the presence of a dinuclear Ir(III) complex having ditertiary...
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