Patents
Patents for C07C 25 - Compounds containing at least one halogen atom bound to a six-membered aromatic ring (5,308)
06/1992
06/16/1992US5122297 Tetracyclic benzene derivatives and liquid-crystalline media
06/13/1992CA2056270A1 Bromination process
06/10/1992EP0489406A1 Decabromodiphenylalkane process
06/10/1992EP0489140A1 Method for preparing 1,1-bis(chlorophenyl) 2,2,2-trichloroethanol.
06/09/1992US5120467 Anisotropic compounds and liquid crystal mixtures
06/04/1992WO1992009367A1 Process for regenerating a zeolite catalyst
06/04/1992CA2097306A1 Process for regenerating a zeolite catalyst
06/04/1992CA2055519A1 Decabromodiphenylalkane process
06/03/1992EP0307446B1 Liquid phase isomerization of iodoaromatic compounds
06/02/1992US5118879 Used in the synthesis of medicinal and agricultural chemicals and water- and oil-repellent agents
05/1992
05/14/1992DE4035509A1 New cyclohexyl-cyclohexene cpds. uses in liq. crystal medium - for LC or electro=optical display with low viscosity
05/12/1992CA1300644C Process for the preparation of naphthacenes
05/06/1992EP0364538B1 Difluorobenzol derivatives
05/05/1992US5110903 Process for the preparation of mixed parylene dimers free of alpha-halogens
05/03/1992WO1992007811A1 Oxyiodination process for manufacture of 2,6-diiodonaphthalene
05/03/1992CA2086744A1 Oxyiodination process for manufacture of 2,6-diiodonaphthalene
04/1992
04/30/1992DE4034123A1 Partially fluorinated alkane derivs. - useful as components of liq. crystal media for electro=optical displays
04/30/1992DE4034109A1 Verfahren zur herstellung von biarylen A process to prepare biaryls
04/27/1992WO1992007809A1 Process for the production of diaryls
04/27/1992CA2094802A1 Process for the production of diaryls
04/22/1992EP0481317A2 Method for dechlorination and/or debromination of aromatic compounds containing fluorine with chlorine and/or bromine
04/21/1992US5107044 Process for bromination of biphenyl with brcl
04/15/1992EP0480008A1 Phenyl cyclohexanes and liquid crystal medium.
04/15/1992EP0479972A1 Phenyl cyclohexanes and liquid cristal medium
04/14/1992US5105036 Friedel-Crafts catalyst and oxy-substituted cyclic amidines as cocatylsts; preferential formation of p-isomer
04/14/1992US5104878 Insecticides, miticides
04/08/1992EP0479542A1 A phosphino binaphthyl compound and transition metal complexes thereof
04/08/1992EP0478740A1 Phenyl cyclohexanes and liquid crystalline medium
04/07/1992CA1298583C Process for producing polybrominated higher alkylbenzenes
04/02/1992DE4111765A1 New penta: and tetra:fluoro-benzene cpds. - useful in liquid crystal medium for electro=optical display esp. super-twist nematic display
04/02/1992DE4107641A1 New di:fluoro-methyl substd. cyclic cpds. used in liq. crystal medium
04/01/1992EP0478311A2 Preparation of 6-Substituted 2-Vinylnaphthalene
04/01/1992CN1059899A Process for preparing product stream rich in naphthalene and 2-monoiodonaphthalene
03/1992
03/31/1992US5101061 Novel benzonitriles, benzaldehydes and benzyl alcohols
03/31/1992CA1298318C Method for producing alkylstyrene
03/31/1992CA1298317C Vapor phase bromination of aromatic compounds
03/27/1992CA2052185A1 Preparation of 6-substituted-2-vinylnaphthalene
03/25/1992EP0313604B1 Electro-optical liquid crystal display element
03/18/1992EP0475273A1 Halogenated alcenyl compounds
03/18/1992EP0475238A2 Mesogenic glycidyl esters
03/14/1992CA2051241A1 Mesogenic glycidyl esters
03/11/1992WO1992004308A1 Process for preparing a product stream rich in naphthalene and 2-monoiodonaphthalene
03/11/1992EP0474465A1 Process for isomerizing trichlorobenzene
03/11/1992EP0474074A1 Process for preparing dichlorobenzene with high content of the p-isomer
03/11/1992CA2086743A1 Process for preparing a product stream rich in naphthalene and 2-monoiodonaphthalene
03/04/1992EP0264435B1 Smectic liquid crystal phases
03/04/1992CA2050503A1 Process for isomerizing trichlorobenzene
03/03/1992US5093512 Reacting Fluoroalkylsilanes With Fluoroalkyl Olefins
03/03/1992US5093026 Biphenylylethanes
03/03/1992US5092971 Bromination
02/1992
02/26/1992EP0471813A1 4,4'-disubstituted 2',3-difluorbiphenyls and liquid crystalline medium.
02/25/1992US5091580 Process for the preparation of 2,6-difluoroaniline
02/18/1992US5089629 From dicyclohexyl-4,4*-dione
02/12/1992EP0470651A1 1,2-Di(4-isobutylphenyl) ethane and its preparation and use as intermediate
02/11/1992US5087769 Preparation of 6-substituted-2-vinylnaphthalene
02/11/1992US5087764 Deprotonation of a 1-substituted-2,3-difluorobenzene using an organometallic compound and reacting the reaction product with an electrophile
02/11/1992US5087724 Substituted benzenes useful as intermediates
02/05/1992EP0469569A2 Process for decabromodiphenylalkane predominant product
02/05/1992EP0469113A1 PREPARATION OF 4-BROMO-o-XYLENE
01/1992
01/28/1992US5084204 Compounds for liquid crystal display elements
01/28/1992CA1294988C Process for the catalytic trans-halogenation of a poly-iodo-benzene
01/22/1992EP0466698A1 Preparation of 2-halofluorobenzene
01/21/1992US5082982 Zeolite type X catalyst
01/21/1992US5082859 Derivatives of benzocycloalkenyldihydroxyalkanoic acids and medications containing them
01/15/1992EP0465621A1 Partially fluorinated compounds.
01/14/1992US5081288 Process for the preparation of substituted 3,5-dichloro-2,4-difluoro-benzenes
01/14/1992CA1294267C Preparation of 1,4-dichlorobenzene
01/09/1992WO1992000264A1 Method for preparing 1,1-bis(chlorophenyl) 2,2,2-trichloroethanol
01/09/1992CA2064864A1 Process for the preparation of 1,1-bis(chlorophenyl)-2,2,2,-trichloroethanol
01/01/1992CN1057450A Process for preparing 1,1-di(chlorophenyl)-2,2,2 trichloroethanol
12/1991
12/31/1991US5077297 Novel compounds
12/31/1991CA1293735C Rooperol and its derivatives
12/27/1991EP0462237A1 1,2-disubstituted 2,6-difluorobenzene compounds and liquid crystal media.
12/12/1991WO1991018855A1 Process for halogenating aromatic compounds
12/11/1991EP0460977A1 Process for reducing the amount of DDT-related impurities in 1,1-bis (chlorophenyl)-2,2,2-trichloroethanol
12/11/1991EP0460922A1 Decabromodiphenyl alkane process
12/11/1991EP0460465A2 Process for the preparation of styrene derivatives having a double bond in an ethylene-extended chain and ethylene-extended styrene derivatives
12/10/1991US5072038 Chemical intermediates for bactericides
11/1991
11/27/1991EP0458176A1 Bicyclohexyl derivatives
11/26/1991US5068475 Process for purifying unreacted 1,2-dichloroethane from a 1,2-dichloroethane pyrolysis process
11/26/1991US5068053 Liquid crystals for optical apparatus
11/21/1991DE4015681A1 Partly-fluorinated 1,2-di:substd. ethylene(s) - useful as components of liq. crystal media for electro-optical displays
11/14/1991WO1991017135A1 Phenyl cyclohexanes and liquid crystal medium
11/14/1991WO1991017134A1 Phenyl cyclohexanes and liquid cristal medium
11/12/1991US5064565 Cyclohexenylethane compound
11/06/1991EP0455058A2 Reagents and method for detecting polychlorinated biphenyls
11/05/1991CA2041783A1 Reagents and method for detecting polychlornated biphenyls
10/1991
10/31/1991WO1991016291A1 Phenyl cyclohexanes and liquid crystalline medium
10/31/1991WO1991016286A1 PROCESS FOR PRODUCING α-FLUOROSTYROLS
10/31/1991DE4113310A1 New 1-haloalkyl 4-fluoro opt.-phenyl-cyclohexane cpds. - are components of liq. crystal media for twisted cell devices with high stability, good solubility, etc.
10/31/1991DE4111028A1 New fluoro-substd. phenyl-cyclohexane derivs. - are components of liq. crystal media for twisted cell devices, with good solubility, high stability, etc.
10/31/1991DE4108705A1 New halogenated tetra:cyclic benzene derivs. - and use in liq. crystal media for electro=optical recording
10/31/1991DE4013305A1 Verfahren zur herstellung von (alpha)-fluorstyrol Process for the preparation of (alpha) -fluorstyrol
10/31/1991DE4013083A1 New alkyl tri:cyclohexylene-tri:fluoro:methyl-benzene derivs. - are components of liq. crystal media for twisted cell devices with high stability, good solubility etc.
10/29/1991US5061400 Wide temperature range, high response speed, low driving voltage
10/24/1991DE4110865A1 New halogenated phenyl-cyclohexane(s) - useful as components of LC media for electro=optical displays
10/23/1991EP0452909A2 Method of purifying non-converted 1,2-dichloroethane from a 1,2-dichloroethane pyrolysis process
10/23/1991EP0452444A1 Phenylcyclohexanes and liquid crystalline media
10/22/1991US5059708 Pyrene-ring-containing olefin compound, intermediate for synthesizing the olefin compound and method of synthesizing the olefin comopund
10/22/1991CA1291172C Process for the catalytic trans-halogenation of a polyiodo-benzene, and, in particular, of a di-iodo-benzene
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