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8592637 Process for preparing mononitrated organic compounds  
The present invention relates to a process for continuously preparing a mononitrated organic compound, especially a process for preparing mononitrobenzene. The invention relates more particularly...
8399710 Alkali metal fluoride dispersion and process for producing fluorine-containing organic compound using the same  
An alkali metal fluoride dispersion of an alkali metal fluoride and an aprotic organic solvent is obtainable by (A) separating a liquid phase from an alkali metal fluoride dispersion comprising an...
8350091 Potassium fluoride dispersion and process for producing fluorine-containing organic compound using the same  
A potassium fluoride dispersion essentially consisting of potassium fluoride and an aprotic organic solvent having a boiling point higher than that of methanol, which is obtainable by mixing a...
7964654 Photoacid generators for the synthesis of oligo-DNA in a polymer matrix  
Compounds represented by the following structural formulas can be used as photoacid generators: Such compounds are useful, for example, in fabricating arrays of polymers.
7863344 Photoacid generators for the synthesis of oligo-DNA in a polymer matrix  
Compounds represented by the following structural formulas can be used as photoacid generators: Such compounds are useful, for example, in fabricating arrays of polymers.
7081548 Process for preparing 3-chloro-5-nitrotoluene  
A preparation process of 3-chloro-5-nitrotoluene is provided in mild conditions. It is a process for preparing 3-chloro-5-nitrotoluene, which involves the steps of reacting 2-methyl-4-nitroaniline...
6806388 Polyfluorinated aromatic or heterocyclic derivatives with sulphurpentalfluoride group(s)  
The invention provides polyfluorinated aromatic or heterocyclic compounds comprising at least three ring substituents, at least one of which comprises a sulfurpentafluoride group and at least one...
6794549 Continuous adiabatic process for nitrating chlorobenzene  
The present invention relates to a continuous adiabatic process for preparing nitrochlorobenzene in the presence of phosphoric acid. The waste acid produced during the practice of the process is...
6586645 Continuous adiabatic process for preparing nitrochlorobenzene  
The present invention relates to a continuous adiabatic process for preparing nitrochlorobenzene, in which the waste sulfuric acid produced during the practice of the process is reconcentrated and...
6380440 Processes for the preparation of 3-bromoanisole and 3-bromonitrobenzene  
Process for the preparation of 3-bromoanisole comprising methoxydenitrating 3-bromonitrobenzene in the presence of a phase-transfer catalyst (PTC), and the preparation of 3-bromonirtobenzene by...
6307045 Process for producing halogenated benzene compound  
The present invention provides a process for producing halogenated benzene compounds. In the process, an organometallic compound represented by the general formula [I]: ##STR1##wherein M...
6284894 Preparation of allylic aromatic compounds  
A process for the preparation of an allylic aromatic compound in which an aromatic amine is reacted first with a nitrite and then with an allylic olefin having an eliminatable terminal...
6255542 Process for preparing 2-chloro-4-nitroalkylbenzene  
A process for preparing 2-chloro-4-nitroalkylbenzenes is provided which comprises a ring chlorination of 4-nitroalkylbenzenes with elemental chlorine or chlorine-releasing compounds in liquid...
5773651 Process for the preparation of fluorine-containing chemical compounds  
Process for the preparation of fluorine-containing compounds by reduction in a container provided with a stirrer, the stirrer being constructed entirely or partly of a carbon material.
5756834 Process for preparing fluorinated aromatics  
It is known to prepare fluorinated aromatic compounds of the formula I ##STR1## in which X, Y and Z can have the meaning specified in the description, by reacting aromatic compounds of the formula...
5728901 Nitration process which employs water tolerant Lewis acid catalysts  
A process for preparing a nitrated arene which comprises reacting an arene and nitric acid in the presence of a water tolerant Lewis acid catalyst under process conditions sufficient to form the...
5714647 Process for the adiabatic preparation of mononitrohalogenobenzenes  
Mononitrohalogenobenzenes can be prepared by mixing halogenobenzene, nitric acid, sulphuric acid and water intensively with one another, simultaneously or in succession in their total quantity,...
5600036 2-trifluoromethyl-4-chlorobenzalchloride and 2-methyl-3-nitro-5-chlorobenzotrifluoride useful as intermediates for preparing 2-methyl-3-aminobenzotrifluoride  
2-Trifluoromethyl-4-chloro-benzalchloride and 2-methyl-3-nitro-5-chlorobenzotrifluoride, are intermediates in a process of preparing 2-methyl-3-aminobenzo-trifluoride. In this process,...
5545768 Process for the preparation of chlorofluronitrobenzenes and difluoronitrobenzenes  
A process for the preparation of chlorofluoronitrobenzenes and difluoronitrobenzenes, which comprises heating dichloronitrobenzene to not more than 200° C. in excess with an alkali metal fluoride...
5475163 Process for the preparation of 2,3-dichloro-nitrobenzene  
2,3-dichloro-nitrobenzene can be prepared by nitration of 1,2-dichlorobenzene using an anhydrous mixture of phosphoric acid, sulphuric acid and nitric acid. The conditions according to the...
5463148 Process for the preparation of chlorofluoronitrobenzenes  
A process for the preparation of chlorofluoronitrobenzenes in high yields, by reacting dichloronitrobenzenes with alkali metal fluorides having a water content of up to about 2.5% by weight in the...
5449831 Process of preparing 2-methyl-3-aminobenzotrifluoride  
2-methyl-3-aminobenzo-trifluoride is prepared with high yields and high productivity by first halogenating o-trifluoromethylbenzalhalide, then secondly hydrogenating...
5315043 Aromatic nucleophilic fluorination  
A process for halogen exchange fluorination or fluoro-denitration of aromatic compounds having at least one replaceable non-fluorine halogen or nitro substituent with an anhydrous substantially...
5313009 Nitration process  
A continuous process to nitrate a nitratable aromatic compound in a nitronium ion solution in a nitrator. The process comprises feeding into the nitrator nitronium ion solution of a composition...
RE34423 Substituted benzenes useful as intermediates  
A process for producing a 4-benzoyl-5-hydroxylpyrazole of the formula III: ##STR1## which comprises reacting carbon monoxide and a 5-hydroxypyrazole of the formula II: ##STR2## with a substituted...
5247124 Process for the preparation of substituted styrenes  
A process for preparing a substituted styrene by reacting a bisarylalkyl ether in the presence of an acid catalyst is disclosed. The process is preferably used for the preparation of...
5237077 Non-pollutional process for producing aromatic nitro compounds without using a mineral acid  
The present invention relates to a process for producing an aromatic nitro compound by introducing a nitrogen oxide gas and ozone-containing oxygen or air into a halogenated organic solvent...
5210339 Process for nitrating benzocyclobutene compounds  
An improved process for the nitration of a substituted or unsubstituted benzocyclobutene compound in a reaction mixture comprising a nitrating agent, an unhalogenated carboxylic acid anhydride,...
5162583 Benzylether derivatives  
Disclosed herein are the derivative of benzyl ether represented by the formula (I) ##STR1## which is useful as an intermediate compound of the derivatives of 1,5-diphenyl-1H-1,2,4-...
5118880 Method of preparing 2-bromo-4,6-dinitromesitylene  
A method of preparing 2-bromo-4,6-dinitromesitylene having only small amounts of impurities, by first mixing fuming sulfuric acid with bromomesitylene, and then adding concentrated nitric acid.
5095157 Process for the preparation of 2-chloro-4-nitro-alkylbenzene  
In the preparation of 2-chloro-4-nitro-alkylbenzene by reaction of 4-nitro-alkylbenzene with elemental chlorine or chlorine-releasing compounds in the presence of a Friedel-Crafts catalyst in the...
5090965 Process for the separation of substances by cooling crystallization  
In the process for the separation of substances by cooling crystallization, the mixture remaining in the crystallizer after separation of the crystal layer is removed and the crystal layer is...
5030776 Process for producing nitrobenzenes  
Nitrobenzenes are prepared by nitrating benzenes in vapor phase using nitric acid as a nitrating agent and under continuous or intermittent feeding of sulfuric acid as a catalyst in the presence...
4978769 Process for introducing fluorine atoms into aromatic rings by nucleophilic exchange  
Aromatic, ring-fluorinated compounds are particularly advantageously prepared by nucleophilic exchange in the course of reaction wih potassium fluoride in the presence of phase transfer catalysts...
4973770 Manufacture of organic nitro compounds  
Process for the mononitration of a nitratable organic compound, such as benzene, with a mixed acid in which one of the reactants is delivered into a body of the other reactant in the form of...
4973772 Catalytic method for producing fluoroarmatic compounds using substituted pyridinium salts  
A process is disclosed for preparing fluoroaromatic compounds (such as fluoronitrobenzene compounds) by reaction of corresponding chloroacromatic compounds (such as chloronitrobenzene compounds)...
4973771 Phase transfer catalysts  
N-secondary-alkyldiorganoaminopyridinium salts are disclosed which are useful as phase transfer catalysts for facilitating preparation of fluoroaromatic compounds (such as fluoronitrobenzene...
4954648 Method for the bromination of aromatic compound  
A method for the bromination of aromatic compounds, including substituted deactivated aromatic compounds, at mild temperature conditions is disclosed. The method comprises reacting an aromatic...
4927980 Catalytic method for producing fluoroaromatic compounds using branched alkyl pyridinium salts  
A process is disclosed for preparing fluoroaromatic compounds (such as fluoronitrobenzene compounds) by reaction of corresponding chloroaromatic compounds (such as chloronitrobenzene compounds)...
4898996 Process for producing 3-chloro-4-fluoronitrobenzene  
A process for producing 3-chloro-4-fluoronitrobenzene which is characterized by chlorinating 4-fluoronitrobenzene in the presence of: (1) iodine or an iodide in combination with iron or an iron...
4868347 Process for obtaining substituted fluorobenzenes  
Substituted fluorobenzenes which are produced in aprotic, polar solvents or in mixtures which contain such solvents can be obtained by extracting the substituted fluorobenzenes from the solvents...
4849552 Preparation of fluoroaromatic compounds in dispersion of potassium fluoride  
An improved process is disclosed for preparing fluoroaromatic compounds (such as fluoronitrobenzene compounds) wherein chloroaromatic compounds (such as chloronitrobenzene compounds) are reacted...
4745219 Chemical intermediates and a process for their preparation  
This invention pertains to chemical intermediates for a new class of 2-haloacetanilide herbicides and a process for preparation of these intermediates. The process generally involves nitration of...
4704483 3,4-difluoro-5-nitrobenzotrifluoride and preparation of fluoro-nitro-benzotrifluorides  
A process for the preparation of 3-chloro-4-fluoro-5-nitrobenzotrifluoride and 3,4-difluoro-5-nitrobenzotrifluoride by reaction of 3,4-di-chloro-5-nitrobenzotrifluoride and...
4684734 Method for manufacture or organic fluorine compounds  
Organic fluorine compounds such as pentafluorobenzonitrile, tetrafluorophthalonitriles, and pentafluoropyridine are produced by a method which comprises causing a chloro- or bromo-organic compound...
4668830 Process for the preparation of compounds containing a difluoromethylene or trifluoromethyl group  
A process for the preparation of compounds containing a difluoromethylene or trifluoromethyl group. A compound containing a carbonyl group, preferbly an acid, acid halide, amide, ketone or any...
4642398 Preparation of fluoronitrobenzene compounds in dispersion of potassium fluoride  
An improved process is disclosed for preparing fluoronitrobenzene compounds wherein chloronitrobenzene compounds are reacted with potassium fluoride in a solvent dispersion thereof prepared from a...
4642399 Method for producing fluoronitrobenzene compounds  
A method is disclosed for producing fluoronitrobenzene compounds by reacting chloronitrobenzene compounds with a fluoride salt in the presence of a tetramethylammonium salt phase-transfer...
4628131 Vapor phase nitration of aromatic compounds  
Aromatic compounds are nitrated in the vapor phase via a process comprising contacting the aromatic compounds with a nitrating agent in the presence of a nitration promoting catalyst composition...
4593144 Process for preparing substituted benzotrichloride compounds  
This invention pertains to a process for preparing substituted and unsubstituted benzotrichlorides. The process generally involves reacting the starting compound with a perchloroalkane with...

Matches 1 - 50 out of 152 1 2 3 4 >