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WO/2000/015594A1 |
A process for the carbonylation of alkyl aromatic compounds uses acidic ionic liquids. In one embodiment, the ionic liquid is intrinsically acidic, having an anion mole fraction of greater than 0.5. The ionic liquids include those compri...
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WO/2000/010963A1 |
The invention relates to substituted cinnamic acids and cinnamic acid esters of formula (1), whereby X represents F, Cl or J and R?1¿ and R?2¿ are the same or different and represent hydrogen, an optionally substituted C¿1?-C¿10?-alk...
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WO/2000/009468A1 |
A method for recovering methyl acetate and residual acetic acid in a two-stage process for producing pure terephthalic acid having a first oxidation stage and a second purification stage.
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WO/2000/007970A1 |
A process for producing pure carboxylic acids by catalytic liquid phase air oxidation of a suitable precursor in a solvent in which the oxidation reaction is carried out in a plug flow reaction zone at a high solvent:precursor ratio and ...
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WO/2000/006530A1 |
A process for producing terephthalic acid and/or dimethyl terephthalate includes contacting a toluene-containing reaction stream with a first catalyst under toluene disproportionation conditions to produce an intermediate product stream ...
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WO/2000/005187A1 |
The invention relates to a method for producing ortho-alkylated benzoic acid derivatives of formula (I), characterized in that aryl bromide of formula (II) is reacted with secondary or tertiary lithiumorganyl and CO¿2?.
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WO/2000/003964A1 |
The invention relates to a method for the acidic or alkaline saponification of biphenyl nitriles. According to this method, the saponification is carried out in water and under pressure, and delivers a high yield of biphenylcarboxylic ac...
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WO/2000/000457A1 |
A method of purifying an aromatic dicarboxylic acid by oxidizing m-xylene or p-xylene to produce crude isophthalic acid or crude terephthalic acid, respectively. The products of the oxidizing step are hydrogenated in the presence of a pa...
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WO/1999/065854A1 |
A method for reducing carboxybenzaldehyde isomers in crude terephthalic and/or isophthalic acids is described. Crude TPA or IPA is dissolved in N-methyl pyrrolidone and is subsequently contacted with an oxidant, such as substantially anh...
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WO/1999/062857A1 |
A method and apparatus for preparing purified terephthalic acid and, optionally, isophthalic acid from mixed xylenes. The method of the present invention purifies the oxidation reactor effluent containing a mixture of terephthalic acid a...
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WO/1999/062637A1 |
The invention relates to a method for producing shell catalysts for the catalytic vapor-phase oxidation of aromatic carboxylic acids and/or carboxylic acid anhydrides comprised of a supporting core and of catalytically active metal oxide...
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WO/1999/061434A1 |
The invention relates to a method for producing phthalic anhydride by means of catalytic vapor-phase oxidation of o-xylol/naphthalene mixtures with molecular oxygen while using a catalyst (I) situated in a first layer on the gas entry si...
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WO/1999/058487A1 |
The present invention provides novel compounds of general formula (I), wherein R?1¿, R?2¿, W, Z and R?5¿ to R?10¿ are defined more fully in the description. The compounds are useful in the treatment of ailments and disorders where a ...
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WO/1999/058486A1 |
The present invention provides novel compounds of general formula (I) wherein R?1¿, R?2¿, W, Z and R?5¿ to R?9¿ are defined more fully in the description. The compounds are useful in the treatment of ailments and disorders where a re...
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WO/1999/057090A1 |
Disclosed is a method for preparing isophthalic acid from metaxylene and especially for purifying crude isophthalic acid (IPA) produced in the course of such method, or otherwise, from a liquid dispersion thereof also containing impuriti...
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WO/1999/052850A1 |
The present invention relates to an oxidation which converts a primary or secondary alcohol of Formula (II) to an acid or ketone of Formula (I) with periodic acid and a catalytic amount of a chromium reagent.
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WO/1999/052849A1 |
The present invention relates to the oxidation of a primary alcohol of Formula (II) to the carboxylic acid of Formula (I): R?1¿CH¿2?OH$m(7)R?1¿CO¿2?H.
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WO/1999/051562A1 |
The present invention provides new retinoid compounds and uses of the compounds in humans and animals for chemoprevention of skin and/or breast cancer and for therapy of leukemia.
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WO/1999/050434A1 |
The strain of the microorganism Penicillium oxalicum var. Armeniaca CCM 8242 produces an anthraquinonyl carboxylic acid derivative of structural formula (I), which may be used as a colorant, especially as a food colorant or cosmetic colo...
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WO/1999/050211A1 |
The object of the present invention is a process for the preparation of alcohols by reduction of the carbonyl function in substrates belonging to the class of aldehydes, ketones, esters or lactones, which substrates may contain unsaturat...
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WO/1999/041225A1 |
A method and an apparatus for recovering terephthalic acid which can continuously prepare a higher-purity terephthalic acid. Crude terephthalic acid prepared by the oxidation of p-xylene in a liquid phase is dissolved in water at a tempe...
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WO/1999/035117A1 |
The subject invention involves processes for making 2,4-difluoro-3-Q1-benzoic acid, wherein Q1 is derived from an electrophilic reagent, comprising the steps of: (a) treating 1-bromo-2,4-difluorobenzene with a strong, non-nucleophilic ba...
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WO/1999/033821A1 |
2,2-Dialkyl- 4-aryl-substituted benzopyran and benzothiopyran derivatives of formula (I) where the symbols have the meaning described in the specification, have retinoid negative hormone and/or antagonist-like biological activities. The ...
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WO/1999/031038A1 |
A process to produce for example terephthalic acid is provided, the process including the steps of: providing a feed stream comprising a dialkyl substituted aromatic and an organic acid solvent: contacting the feed stream with a vapour s...
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WO/1999/028285A1 |
A subject of the invention is the method of recovery of terephthalic acid and ethylene glycol from poly/ethylene terephthalate/wastes. According to the invention poly/ethylene terephthalate/ is heated in an aqueous solution at the temper...
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WO/1999/025681A1 |
The invention concerns a method for preparing 4'-bromomethyl-biphenyl derivatives of general formula (I) in which R is as defined in Claim 1, characterised in that it consists in reacting in a biphasic medium and under the effect of ligh...
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WO/1999/024139A1 |
A process for separating a compound from a mixture of different compounds is disclosed for compounds comprising at least two negatively charged groups connected by a linker group. The process comprises treating the mixture with a materia...
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WO1999016738B1 |
This invention concerns a method for recycling polyesters comprising the hydrolysis of polyesters containing repeat units derived from 2,6-naphthalene dicarboxylic acid in the presence of a carboxylic acid which gives pure 2,6-naphthalen...
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WO/1999/023055A1 |
A method and apparatus for purifying crude terephthalic acid from a liquid dispersion thereof also containing impurities selected from unreacted starting materials, solvents, products of side reactions and/or other undesired materials is...
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WO/1999/021838A1 |
The 2-[2-(3,5-dichlorophenyl)ethyl]benzoic acid (V) which is the key intermediate for the preparation of eberconazol (I) through a known sequence of four steps is prepared by catalytic hydrogenation of 2-[2-(3,5-dichlorophenyl)ethenyl]be...
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WO/1999/018062A1 |
Disclosed is a process for the purification of a naphtalenedicarboxylic acid (NDA) which has been manufactured by the oxidation of a dialkylnaphthalene in the presence of a molecular oxygen-containing gas and a heavy metal-containing cat...
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WO1999010322B1 |
The invention concerns compounds of formula (I) in which: Ar represents a radical selected among formulae (a) to (c). Z being O, S, or N-R6; R1 represents in particular a halogen atom, -CH3, or carboxyl; R2 and R3 represent in particular...
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WO/1999/010308A1 |
The invention concerns compounds of formula (I) in which: Ar represents an aromatic radical or a heteroaromatic radical optionally substituted in particular by an alkyl or a carboxylic group; R¿2? and R¿3?, represent in particular H, a...
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WO/1999/010527A2 |
The invention relates to a method for isolating anionic organic substances from aqueous systems using polymer nanoparticles with cationic pH-sensitive surface groups. Extraction can be carried out directly from diluted solutions, biologi...
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WO/1999/005151A1 |
A solid product which is a porous chiral (10,3)-a network of 1,3,5-benzenetricarboxylate molecules of formula (I) where X is H, hydrocarbon, halide, etc, linked through metal atoms. Preferably the metal atoms are transition or lanthanide...
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WO/1999/003810A1 |
The invention relates to a method for producing oxo products by hydroformylation of substrates with C=C double bonds, using unmodified rhodium catalysts in a reaction mixture consisting essentially of the substrates, the catalyst and car...
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WO/1999/000346A1 |
The synthesis and use of the anxiolytic compound dihydrohonokiol, its derivatives, analogs and homologs are disclosed. A method for reducing anxiety in a mammal is also disclosed.
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WO/1998/058922A1 |
Aryl-substituted and aryl and (3-oxo-1-propenyl)-substituted benzopyran, benzothiopyran, 1,2-dihydroquinoline, and 5,6-dihydronaphthalene derivatives have retinoid negative hormone and/or antagonist-like biological activities. The invent...
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WO/1998/051654A1 |
A process for preparing a carboxylic acid of formula R?1�CO�2?H, wherein R?1� is optionally substituted aryl, optionally substituted heteroaryl or alkenyl optionally substituted by aryl; the process comprising reacting an alcohol o...
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WO/1998/049136A1 |
Certain novel substituted (5,6)-dihydroanthracenyl compounds of general formula (I), wherein A, n, p, R�1?, R�2?, R�3?, R�4?, R�5?, R�6?, R�7? and R�8? are as defined in the specification exhibit retinoid-like properties ...
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WO/1998/047854A1 |
Compounds of formula (I) where the symbols have the meaning defined in the specification, have retinoid, retinois antagonist or retinoid inverse agonist type biological activity.
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WO/1998/047969A1 |
Amyloid binding compounds which are non-azo derivatives of Chrysamine G, pharmaceutical compositions containing, and methods using such compounds to identify Alzheimer's brain $i(in vivo) and to diagnose other pathological conditions cha...
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WO/1998/046547A1 |
A process is disclosed for preparing 2-aryl-substituted indenes by reacting an indene with an arene compound substituted with an halogen atom, preferably a iodine atom, or with an organosulphonate group, said reaction being carried out i...
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WO/1998/046562A1 |
The compounds of formula (I) wherein R is as defined in the disclosure, are prepared by bromination of compounds of formula (II) by means of Br�2? or HBr in the presence of H�2?O�2?.
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WO/1998/045242A1 |
Compounds represented by general formula (I), wherein R?1� represents hydrogen or C�1-6? alkyl; R?2�, R?3� and R?4� represent hydrogen, C�1-6? alkyl, etc.; and X represents a divalent group -C(R?5�)(R?6�)- or -NR?7�- (w...
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WO/1998/045252A1 |
Aromatic amides, their preparation process and their use as pesticides.
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WO/1998/043937A1 |
Methods for reducing the fouling of process equipment used in the manufacture of aromatic compounds such as dimethyl-2,6-naphthalenedicarboxylate are disclosed. The methods require treating manufacturing process streams with a metal comp...
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WO/1998/042649A1 |
A process for producing 2,6-naphthalenedicarboxylic acid by the liquid phase, exothermic oxidation of 2,6-dimethylnaphthalene comprising adding to a reaction zone oxidation reaction components comprising 2,6-dimethylnaphthalene, a source...
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WO/1998/039284A1 |
Compounds of formula (1) wherein the symbols have the meaning defined in the specification, have retinoid-like, retinoid antagonist or retinoid inverse agonist-like biological activity.
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WO/1998/038150A1 |
An aromatic carboxylic acid such as terephthalic acid is produced by the liquid phase oxidation of a precursor thereof, the oxidation being carried out in such a way that substantially all of the aromatic carboxylic acid produced in the ...
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