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WO/1998/005610A2 |
A process is disclosed for preparing fluorine-containing compounds by reacting a compound which contains a halogen that can be replaced by fluorine with a fluoride or a mixture of fluorides of general formula (I): MeF, in the presence of...
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WO/1998/000376A1 |
The present invention provides several methods of synthesis and separation in which organic/fluorous phase separation techniques are used to effect separations. The present invention also provides novel compositions of matter comprising ...
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WO/1997/043231A1 |
The invention features a useful method for the synthesis of fluorinated derivatives. It is characterised in that it comprises at least one step in which a substrate comprising one sp3 hybridising halogenophore carbon bearing at least two...
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WO/1997/041083A1 |
Compounds containing a primary amino group are converted into compounds containing a fluorine atom in place of the amino group by reaction of the amino compound with hydrogen fluoride and a nitrosating reagent under the influence of ultr...
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WO/1997/035824A1 |
A process for the preparation of fluorinated dicarbonyl compounds of general formula (2), comprising reacting dicarbonyl compounds of general formula (1) with fluorine gas without any solvent in the presence of one or more acids selected...
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WO/1997/034872A1 |
The invention concerns a process for preparing pyridyl-substituted N-phenylhydroxylamines of formula (II) by catalytically hydrogenating the corresponding nitro compounds in the presence of an N-substituted morpholine compound and rearra...
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WO/1997/032832A1 |
The production of fluorinated aromatic compounds of general formula (I), in which W, X, Z, R1 and R2 have the meanings given in the description, from corresponding C1 or Br-containing compounds with fluorides, e.g. KF, with halogen excha...
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WO/1997/032835A1 |
A process for producing benzyl fluoride derivatives represented by general formula (II), wherein R1 represents hydrogen, lower alkyl, etc.; R2 represents hydrogen, piperazinyl, piperidyl, pyrrolidinyl, morpholinyl, amino or heteroaryl; a...
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WO/1997/018893A1 |
The present invention relates to a catalyst for preparing para-chloro aromatic compounds by the liquid-phase chlorination method. The catalyst is prepared by loading transition metal salts, rare earth metal salts or a mixture thereof, an...
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WO/1997/000848A1 |
A process for the preparation of an ester, especially fluorinated esters R1O.OC-CFR2-CO.OR3.R1 and R3 are each independently selected from alkyl, cycloalkyl and aryl. R2 is selected from hydrogen, alkyl, cycloalkyl. The method includes t...
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WO/1996/023754A1 |
This invention relates to a method for preparing difluoromethyl ethers, thiols and amines without using chlorofluorocarbon gases. The intermediates prepared by this method can be used to make certain compounds which act as PDE IV inhibit...
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WO/1996/016002A1 |
A method of fluorination by reacting UF6 with a C2 to C8 alcohol, acids, esters, aldehydes or epoxides. The preferred reagent is a monohydroxyl or polyhydroxyl alcohol which does not form a chelate when reacted with UF6. The reaction is ...
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WO/1996/015084A1 |
A process for producing a halogenated organic compound by the addition reaction between an organic compound having an aliphatic carbon-carbon unsaturation and a hydrogen halide, wherein the reaction is catalyzed by an organic compound ha...
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WO/1996/013474A1 |
The method described calls for primary and secondary alcohols to be reacted with perfluorobutane sulphonyl fluoride, or with higher homologues such as perfluorooctane sulphonyl fluoride, in the presence of 2-3 equivalents of strong organ...
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WO/1996/012702A1 |
A polymer having repeating units of a conjugated N-fluoropyridinium salt, and a positive active material, electrolyte, positive electrode battery material and battery each prepared from the polymer. The battery material and primary and s...
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WO/1996/011227A1 |
A preferred process for producing a brominated, non-fused aromatic composition involves a continuous bromination in a continuous, mixed reactor such as a continuous stirred tank reactor. Bromine and the aromatic substrate, and optionaly ...
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WO/1996/003358A1 |
Halogenated compounds are prepared by ring opening reactions of highly fluorinated cyclopropanes with chlorine, bromine, iodine, or mixtures thereof at temperatures over 100 �C. A novel compound, which is one type of compound produced,...
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WO/1996/003357A1 |
A process for the preparation of a selectively fluorinated organic compound, which process includes reaction of a precursor of said organic compound, the precursor containing at least one Group VI element selected from sulfur, selenium a...
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WO/1996/003356A1 |
A method of iodinating and/or brominating and/or chlorinating an aromatic compound which comprises the steps of reacting an iodinating agent and/or brominating agent and/or chlorinating agent with the aromatic compound in the presence of...
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WO/1995/029886A1 |
The present invention concerns processes for preparing aromatic, bromine-containing compounds, novel bromine-containing compounds and their use as intermediate products in the synthesis of active agents. Processes according to the invent...
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WO/1995/016649A1 |
According to the present invention there is provided a process for the selective introduction of one or more fluorine atoms into a disubstituted aromatic compound in an acid medium with fluorine gas characterised in that the acid medium ...
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WO/1995/014646A1 |
A method for the production of 1,3-diketones and 1,3-ketoesters of formula (1), (2), (3) or (4), which comprises converting the corresponding compound of formula (5), (6), (7) or (8), into compounds of formula (1), (2), (3) or (4) by rea...
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WO/1994/024098A1 |
Described are NU-fluorosulphonimides of the general formula (I) (R1-SO2)2NF in which each R1 is a methyl group or the R1 groups together form a -(CH2)n- group in which n=1, 2 or 3, in particular N-fluoromethansulphonimide, (CH3SO2)2NF, t...
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WO/1994/019299A1 |
A process for recovery HF from an aqueous waste stream generated in manufacturing fluoroaromatics.
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WO/1994/010120A1 |
An industrial process for producing a fluorinated dicarbonyl compound in a high yield, wherein a dicarbonyl compound represented by the general formula R1COCHR2COR3 (wherein R1 represents hydrogen, halogen, or (un)substituted alkyl or ar...
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WO/1994/003414A1 |
A fluorinating reagent represented by general formula (I), and a method of fluorinating an alcoholic hydroxyl group with the same, wherein R represents C1-C5 alkyl or dialkylamino having C1-C3 alkyl groups. The starting material of the r...
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WO/1993/019034A1 |
Production of chlorine-substituted olefine compounds of formula (I), wherein: R?1¿ represents a C-organic rest; R?2¿ represents -CN, -CO-R?3¿, -CO-S-R?3¿, -CO-O-R?3¿, -CO-N(R?4¿, R?5¿); R?3¿ represents a C-organic rest; R?4¿, R?...
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WO/1993/009074A2 |
Compounds having acidic protons and a molecular structure which can delocalize the electron density of the conjugate base (target compounds) are chlorinated by contacting such compounds with a perchloroalkane and aqueous base in the pres...
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WO/1993/009078A1 |
Active methine compounds are chlorinated by contacting such compounds with a perchloroalkane and aqueous base in the presence of a phase transfer catalyst which is a tetraalkylonium hydroxide. Chlorinated products, preferably tertiary al...
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WO/1993/002036A1 |
A novel procedure for bromination of aromatic moieties utilizes N-bromosuccinimide or dibromodimethylhydantoin in an aqueous alkali medium. The bromination procedure is employed for the preparation of an intermediate used in the preparat...
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WO/1992/012983A1 |
The present invention provides a novel compound represented as formula (I). The present novel compound is prepared by reacting fluorine with pyridine-boron trifluoride and is useful as a fluorinating agent in the fluorination of organic ...
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WO/1992/010447A1 |
The present invention provides an efficient process for the production of ethylene or a mixture of ethylene and vinyl chloride, in which some 1,2-dichloroethane (EDC) may also be produced, by reacting chlorine with ethane. The process is...
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WO/1991/017972A1 |
An improved process is disclosed for preparing aromatic fluorides by diazotization-fluorination in hydrogen fluoride. The improvement includes, prior to the decomposition of the diazonium fluoride, adding to the diazotizing reaction mixt...
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WO/1991/011430A1 |
Aromatic amine compounds are halogenated in the presence of a quaternary ammonium halide.
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WO/1990/007479A1 |
A method of obtaining bromated aromatic and heterocyclic combinations containing acceptor groups provides for bromination of aromatic and heterocyclic combinations, containing acceptor groups, with bromine or hydrobromic acid, the proces...
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WO/1990/006296A1 |
A liquid phase process for making perfluorinated organic substances which comprises directly contacting in a temperature-controlled reactor a diluted solution or dispersion of a perfluorinateable, organic substance in a liquid, inert med...
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WO/1990/003353A1 |
This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.
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WO/1990/000535A1 |
Normal alkane hydrocarbons are chlorinated with high terminal selectivity by pre-adsorbing the hydrocarbons into a pentasil zeolite.
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WO/1989/010341A1 |
A process for producing an organofluorine compound, which comprises reacting an organochlorine compound or an organic unsaturated compound with hydrogen fluoride in the presence of a catalyst comprising a support of active alumina having...
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WO/1989/008630A1 |
A method for the direct halogenation of aromatic compounds, especially the direct iodination of aromatic compounds, is described. A solution of halogen compound and the aromatic compound to be halogenated, dissolved in an acidic solvent,...
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WO/1989/004817A1 |
Disclosed is a process for continuous preparation of aromatic fluorides wherein aromatic diazonium fluorides are continuously decomposed at low concentration in a reaction system of one or more continuous agitated reactors.
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WO/1989/003373A1 |
A process for iodinating aromatic compounds, comprising the steps of iodinating an aromatic compound, separating a desired iodoaromatic product from the product mixture, purifying said desired iodoaromatic product, and isolating said des...
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WO/1989/001465A1 |
A method of iodinating hydroxyaromatic and aminoaromatic compounds is disclosed, comprising reacting the hydroxyaromatic or aminoaromatic compound with an aqueous solution of a metal iodide and a metal hypochlorite at a temperature -100ï...
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WO/1989/000986A1 |
A process for the vapor phase iodination of an aromatic compound which involves combusting an alkyl aromatic iodide in the presence of oxygen to produce molecular iodine and feeding the molecular iodine and an aromatic compound to an oxy...
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WO/1988/007987A1 |
An improved process is disclosed for preparing aromatic fluorides by diazotization-fluorination in hydrogen fluoride wherein the diazotized reaction mixture includes an oxidizing agent such as nitrosonium ion from excess diazotization ag...
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WO/1988/007511A1 |
The invention relates to a process for isomerizing iodoaromatic compounds over a non-acidic zeolite catalyst in the liquid or gas phase in the presence of a source of iodine.
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WO/1988/007513A1 |
The invention relates to a process for the vapor phase bromination of aromatic compounds in the presence of oxygen and a catalyst containing an oxidizing metal and an inert support.
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WO/1988/007512A1 |
The invention relates to a process for isomerizing and transiodinating iodoaromatic compounds over a non-acid catalyst.
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WO/1988/007510A1 |
The invention relates to a process for isomerizing liquid iodoaromatic compounds over an acid catalyst.
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WO/1988/007509A1 |
A process for iodinating an aromatic compound in which a source of iodine is reacted with the aromatic compound in the presence of oxygen over a non-acid catalyst wherein the aromatic compound in the presence of oxygen over a non-acid ca...
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