Patents
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Patents for C07C 63 - Compounds having carboxyl groups bound to carbon atoms of six-membered aromatic rings (6,553)
06/1991
06/04/1991US5021220 Kit for preparing radiodiagnostic examination compositions
05/1991
05/31/1991CA2030961A1 Angiotensin ii antagonists
05/29/1991EP0235128B1 A process for preparing reactive polymeric compositions from arylcyclobutene monomeric compositions
05/28/1991US5019567 Benzoyl peroxide--quaternary ammonium lipophilic salicylate based pharmaceutical and cosmetic compositions and their use especially in treatment of acne
05/21/1991CA2028736A1 Selective removal of chlorine from chlorophthalic compounds
05/20/1991CA2016658A1 Preparation of 2,4,5-trifluorobenzoic acid by decarboxylation of 3,4,6-trifluorophthalic anhydride
05/20/1991CA2016657A1 Preparation of 3,4-difluorobenzoic acid by the decarboxylation of 4,5-difluorophthalic anhydride or 4,5- difluorophthalic acid
05/08/1991CA2002456A1 Ligand catalyst systems formed by reaction of carbonyl compounds with organosilicon compounds
04/1991
04/30/1991US5011987 Process for manufacturing high-purity o-toluic acid
04/17/1991CN1050666A Bioherbicide combining chemical agents and bacterial plant pathogens
04/16/1991US5008450 Process for exchanging dispersing medium of terephthalic acid slurry
04/10/1991EP0421046A1 Process for producing highly pure 3,3',4,4' - biphenyltetra- carboxylic acid or dianhydride thereof
04/04/1991WO1991001307A3 N-cyanoimides and process for their preparation and uses thereof
04/04/1991WO1990015042A3 Reactive compounds containing perfluorovinyl groups
04/02/1991US5004830 Process for oxidation of alkyl aromatic compounds
04/02/1991CA1282412C 1-cyclopropyl-6-fluoro-8-bromo-1,4-dihydro-4-oxo-3- quinoline carboxylic acid and derivatives
03/1991
03/26/1991US5003085 Catalytic oxidation of methylated diphenyl substituted maleic anhydride
03/20/1991EP0417690A2 Aromatization process
03/20/1991EP0417445A1 Single pot process for making a fluoroanthranilic acid
03/13/1991EP0416602A2 Bis(4-halo-phthalic acid)quarter salts, process for their preparation and their use
03/12/1991WO1991003161A1 Bioherbicide combining chemical agents and bacterial plant pathogens
03/12/1991US4999449 Novel poly(arylcyclobutenes)
03/12/1991US4999363 Tricyclic compounds
03/12/1991CA2064762A1 Bioherbicide combining chemical agents and bacterial plant pathogens
03/12/1991CA2023720A1 Aromatization process
03/07/1991WO1991002713A1 Method of producing 3,4,3',4'-substituted biphenyl compounds
03/01/1991CA2021727A1 Single pot process for mixing fluoroanthranilic acid
02/1991
02/27/1991EP0414062A2 Process for preparing aromatic dicarboxylic acids and novel aromatic dicarboxylic acids
02/26/1991US4996355 Novel intermediates for the production of 2,4,5-trifluorobenzoyl fluoride
02/19/1991US4994610 Process for preparing fluorinated benzoyl compounds
02/19/1991US4994489 Ester derivatives of diarylacetylenes, their compositions and their use in acne treatment
02/13/1991CN1011587B Process for the preparation of quinolonecarboxylic acid derivatives and their use
02/12/1991US4992579 Catalytic oxidation using cerium, cobalt, manganese, zirconium, bromine containing catalyst
02/12/1991US4992574 Benzocycloheptene derivatives
02/07/1991WO1991001307A2 N-cyanoimides and process for their preparation and uses thereof
02/06/1991EP0411790A1 Process for the preparation of nylon salts
02/06/1991EP0411252A1 Process for the preparation of fluorobenzoic acids
02/05/1991US4990661 Process for the preparation of benzoic acid derivatives
02/05/1991US4990659 Process for the manufacture of derivatives of benzoic acid
01/1991
01/31/1991DE4022997A1 New asymmetrical 2,2-bis-aryl-hexa:fluoro-propane(s) - prepd. by dehydration-condensn. of 2-aryl-hexa:fluoro-2-propanol and aromatic cpd. in presence of hydrogen fluoride
01/30/1991CA2021972A1 Process for the preparation of nylon salts
01/23/1991EP0409437A2 Process for preparing aromatic polycarboxylic acids
01/23/1991EP0409172A2 Process for dimerizing aromatic halogen compounds
01/22/1991US4987259 Multistep, from the corresponding diacid
01/22/1991US4987238 Process for the preparation of high-purity 5,5'-[2,2,2-trifluoro-1-(trifluoromethyl)-ethylidene]bis-1,3-isobenzofurandione
01/22/1991US4986845 Pre-and postemergence
01/16/1991EP0407588A1 Process for producing 2-oxo-3-aromatic carboxylic acid derivatives
01/09/1991EP0406424A1 Process for recovering crystals from slurry
01/02/1991EP0405602A1 New Zinc derivatives of anti-inflammatory drugs having improved therapeutic activity
01/01/1991US4981999 Hydrodechlorination
12/1990
12/26/1990CN1010937B Recovery of organic acids catalyst and water from terephehalic acid mfr.
12/18/1990US4978769 Process for introducing fluorine atoms into aromatic rings by nucleophilic exchange
12/10/1990WO1990015042A2 Reactive compounds containing perfluorovinyl groups
12/10/1990CA2031186A1 Reactive compounds containing perfluorovinyl groups
12/06/1990WO1990015046A1 Extraction process for removal of impurities from terephthalic acid filtrate
11/1990
11/28/1990EP0399029A1 An improved process for production of polycarboxylic aromatic acids
11/28/1990EP0398967A1 Antibacterial agents
11/22/1990EP0398282A1 Process for manufacturing high-purity o-toluic acid
11/14/1990EP0191858B1 Poly(arylcyclobutenes)monomersand a method of polymerising thereof
11/13/1990US4970338 Preparation process of biphenyl-4,4'-dicarboxylic acid
11/13/1990CA1276368C Polyimides, a process for their preparation and their use, and tetracarboxylic acids and tetracarboxylic acid derivatives
11/07/1990EP0396014A2 Substituted biphenylcarboxylic acids, process for their preparation and new intermediates
11/06/1990US4968852 Phosphine-rhodium complex decarbonylation catalyst
11/06/1990US4968830 Halogenative dehydrogenation
11/01/1990WO1990012780A1 Intermediates for the production of 2,4,5-trifluorbenzoyl fluoride
10/1990
10/31/1990EP0395342A2 Process for the preparation of fluorine-containing organic compounds
10/30/1990US4966998 Trisubstituted benzoic acid intermediates
10/30/1990US4966995 Process for the preparation of chlorides of carboxylic acids
10/29/1990CA2015578A1 Substituted biphenylcarboxylic acids, a process for their preparation and novel intermediates
10/24/1990EP0393086A1 Processes for preparing 3,4-dihydro 2-naphthanoic acid and 2-naphthanoic acid and esters thereof
10/24/1990CN1046326A Preparation of biphthalic acid by phase-transfer catalyzed oxidation method from phenanthrene
10/23/1990US4965406 Liquid phase catalytic oxidation of toluene in presence of phase transfer agent
10/23/1990US4965394 Difunctional polyfluoroaromatic derivatives and a process of preparing the same
10/16/1990US4963127 Capacitor dielectrics
10/10/1990EP0391212A2 Process for preparing bifunctional Z-stilbene compounds, new bifunctional Z-stilbene compounds and their use for preparing polymers
10/10/1990CN1045966A Monomer containing hexafluorisopropyl, processes thereof and application
10/10/1990CN1009920B Halogenobenzoic acid derivatives and their prepn.
10/03/1990EP0389961A1 Monomerides containing the hexafluoroisopropyl group, process for their preparation and their use
09/1990
09/26/1990EP0370083A4 Seal for rotatable shaft
09/26/1990CN1045576A Pesticides
09/25/1990US4959488 Complexing agents
09/25/1990CA2012918A1 Hexafluoroisopropyl-containing monomers, process for their preparation and their use
09/25/1990CA1274539A1 Carbonylation process for the production of aromatic acids
09/12/1990EP0386452A1 Diphenyl heteroalkyl derivatives, their preparation and medicinal and cosmetic preparations prepared therefrom
09/11/1990CA1273929A1 N-(piperidinyl-alkyl)-carboxamides
09/05/1990EP0385253A1 Process for preparing 2,4,5-trifluorobenzoic acid
09/04/1990US4954639 Reacting fluorophthalic acid compound with hydroxylamine or salt
09/04/1990CA1273630A1 Deprotection of allylic esters and ethers
08/1990
08/29/1990CN1044937A Process for the producing dmt-intermediate product of speeific purity as well as its working up to pure dmt and/or medium pure or pure terephthalic acid
08/28/1990US4952708 Method for preparing biaryl compounds
08/28/1990CA1273364A1 Process for dimerization of aromatic halide compounds
08/27/1990CA2010158A1 Process for preparing 2,4,5-trifluorobenzoic acid
08/23/1990WO1990009367A1 Process for manufacturing a dmt intermediate product of given purity and subsequent processing thereof to obtain ultrapure dmt and/or medium- or high-purity terephthalic acid
08/21/1990US4950813 Preparation of substituted benzotrichlorides
08/21/1990CA1273020A1 Preparation of aromatic carbonyl compounds
08/17/1990CA2046920A1 Process for manufacturing a dmt itermediate product of given purity and subsequent processing thereof to obtain ultrapure dmt and/or medium-or high-purity terephthalic acid
08/16/1990EP0381704A1 Process for preparing 2-acetonaphthones
08/10/1990CA2008042A1 Diphenylheteroalkyl derivatives, the preparation thereof and drugs and cosmetics prepared therefrom
08/09/1990WO1990006669A3 An improved process for production of polycarboxylic aromatic acids
08/08/1990CN1009086B Prepn. trisubstituted benzoic acid intermediates
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