Patents
Sitemap › C07 - Organic chemistry › C07C - Acyclic or carbocyclic compounds › C07C 25 - Compounds containing at least one halogen atom bound to a six-membered aromatic ring
Patents for C07C 25 - Compounds containing at least one halogen atom bound to a six-membered aromatic ring (5,308)
10/1991
10/20/1991CA2014992A1 Degradationn of polychlorinated biphenyls
10/16/1991EP0451720A1 Process for the separation of m- and p-dichlorobenzene
10/16/1991EP0306521B1 Ethine derivatives as compounds of liquid crystal phases
10/13/1991WO1991016287A1 Process for preparation of 1,2,4-trifluorobenzene and 1-chloro-3,4-difluorobenzene
10/13/1991CA2078215A1 Process for the preparation of 1,2,4- trifluorobenzene and 1-chloro-3, 4- difluorobenzene
10/09/1991EP0449977A1 Improved hydrogenolysis/dehydrohalogenation process.
10/08/1991US5055622 Novel tetrahydronaphthalene and indane derivatives
10/08/1991US5055235 Bromination process
10/08/1991US5055220 Dicyclohexylethylene derivatives
10/03/1991WO1991006522A3 Phenylcyclohexanes and liquid crystalline media
10/02/1991EP0449288A2 Phenylethanes and liquid crystal medium
10/02/1991EP0449015A2 Difluoromethyl compounds and liquid criystal medium
10/02/1991DE4010433A1 New chloromethyl substd. linear poly-cyclic cpds. - used in liq. crystal medium esp. for matrix or super-twist display
10/01/1991US5053566 Catalysis reaction with bromine or chlorine halogenating agent, in the presence of methylene chloride and metal cation containing Type-L zeolite
10/01/1991US5053565 Chlorinating toluene in presence of methylene chloride and/or chloroform with zeolite catalyst
10/01/1991US5053547 Benzonorbornene derivatives, processes for their preparation and medicinal and cosmetic compositions containing them
09/1991
09/26/1991DE4106345A1 New halogen-substd. 1,2-di:phenyl-ethane cpds. and use - in liq. crystal medium for LCD and electro-optical display with low viscosity
09/25/1991EP0420975A4 Degradation of polychlorinated biphenyls
09/25/1991CN1014057B Rectification-recovery process of acrylonitrile
09/24/1991CA1289334C Process for destroying organic products with toxic effects and equipment for implementing this process
09/19/1991WO1991013850A1 4,4'-disubstituted 2',3-difluorbiphenyls and liquid crystalline medium
09/19/1991DE4107120A1 4,4'-Di:substd. 2',3-di:fluoro-bi:phenyl cpds. - useful as components of liq. crystal media for electro=optical displays
09/18/1991EP0447259A1 Process for preparing chloro-difluorobenzene
09/18/1991EP0447152A1 Decabromodiphenyl alkane process
09/18/1991EP0446301A1 Preparation of biaryl compounds.
09/17/1991WO1991013847A1 Process for preparing chloro-difluorobenzene
09/17/1991CA2058294A1 Process for preparing chlorodifluorobzene
09/13/1991CA2038039A1 Compound for use in the synthesis of semiconducting polymers with perpendicularly arranged cores and method of synthesizing said compound
09/11/1991EP0445595A2 Bromination process
09/10/1991US5047170 Anisotropic compounds having nematic phase and liquid crystal mixtures
09/05/1991WO1991013047A1 PREPARATION OF 4-BROMO-o-XYLENE
09/04/1991EP0444448A2 Phenylcyclohexylethane and liquid crystal medium
08/1991
08/29/1991DE4005882A1 Fluorinated aromatics, e.g. fluorinated bis-phenyl-buta-di:yne - useful as components of liq. crystal phases
08/28/1991CN1054068A Process for lithiation of 1,3-bis (trifluoromethyl) benzene
08/28/1991CN1013667B Method of manufacturing pentabronrotoluene
08/27/1991US5043493 Isomerization using zeolite catalyst
08/24/1991WO1991003446A1 Phenylcyclohexanes and liquid crystal medium
08/22/1991DE4004650A1 Halogenated bi:phenyl-cyclohexyl-ethane(s) - useful as components of liq. crystal media for electro-optical displays
08/21/1991EP0442340A2 Process for the preparation of an organolithium compound starting from 1,3-bis(trifluoromethyl)-benzene
08/21/1991EP0442306A2 (4E-cyclohexyl-3-butenyl)phenyl derivatives
08/21/1991EP0442115A1 Process for nucleus-chlorination of aromatic hydrocarbons
08/21/1991EP0441951A1 Halogenated benzene derivatives and liquid crystalline medium.
08/21/1991EP0441932A1 Fluorobenzole derivatives and mesomorphous medium.
08/21/1991EP0252964B1 Catalytic method for producing fluoroaromatic compounds using substituted pyridinium salts
08/20/1991US5041639 Polysubstituted derivatives of naphtalene, their process of preparation and their application in the cosmetic and pharmaceutical fields
08/13/1991US5039807 Phenyl pyrid(-one or-thione) compounds which are intermediates
08/13/1991US5039729 Consisting of hexabromodiphenyl ethane, heptabromodiphenyl ethane and octabromodiphenyl ethane; flame retarders
08/08/1991WO1991011418A1 Partially fluorinated compounds
08/08/1991WO1991005750A3 Process for producing fluorinated organic compounds
08/01/1991DE4101600A1 New partly fluorinated uncondensed poly:cyclic cpds. - used in LCD medium, with low viscosity and wide mesophase range
08/01/1991DE4101543A1 New alkyl substd. fluorinated terphenyl cpds.
07/1991
07/31/1991EP0439089A1 Halogenated terphenyls and liquid crystal medium
07/31/1991EP0438715A2 1,1-Bicyclo-substituted fluorinated cyclopentanes and method for their production
07/31/1991CN1013370B Process for preparing 2,4,5-trihalogeno-and 2,3,4,5-tertrahalogeno-benzene derviatives
07/30/1991US5035928 Liquid crystal display device
07/23/1991CA1286694C Process for the preparation of (2,2)-paracyclophane and derivatives thereof
07/16/1991US5032313 Trifluorobenzene derivative and liquid crystal composition containing the same
07/09/1991US5030778 Catalytic bromination of diphenylalkane
07/09/1991US5030777 Synthesis of 3,5-dichloroalkylbenzene and recovery of 1,3-dichlorobenzene
07/09/1991US5030765 Skin disorders, anititumor agents
07/09/1991US5030764 Antitumor agents; treatment of skin disorders
07/02/1991US5028254 Azole derivatives and agricultural and horticultural chemical composition containing the same
06/1991
06/25/1991US5026939 Method for producing 4-isobutylstyrene
06/25/1991US5026931 Process for preparing a product stream rich in naphthalene and 2-monoiodonaphthalene
06/25/1991US5026894 Spirobifluorene compounds
06/20/1991DE4000534A1 New 1,4-di-substd. 2,6-di:fluoro:benzene derivs. - used in components of liq. crystal media as dielectric giving good stability to UV and temp.
06/19/1991EP0408759A4 Method of obtaining bromated aromatic and heterocyclic combinations containing acceptor groups
06/13/1991DE4000535A1 1,4-Di:substd. 2,6-di:fluoro-benzene cpds. - useful as components of liq. crystal media
06/12/1991EP0179788B1 Pesticides
06/07/1991WO1991008184A2 1,2-disubstituted 2,6-difluorobenzene compounds and liquid crystal media
06/07/1991CA2046590A1 1,4-disubstituted 2,6-difluorobenzene compounds, and a liquid crystalline medium
06/05/1991EP0430434A2 Process for the preparation of fluoroaromatic and fluoroheteroaromatic compounds
06/05/1991EP0429821A2 Chemiluminescent solution based on substituted anthracene
06/05/1991EP0429574A1 Chlorobenzene derivatives
06/05/1991EP0429558A1 Diphenylylethanes and liquid crystalline phase.
05/1991
05/29/1991EP0428791A1 Process for using an improved catalyst for dehydrohalogenation
05/29/1991EP0428666A1 Fluoro-chloro-benzene derivatives.
05/29/1991CA2030883A1 Chemiluminescent solution based on substituted anthracene
05/28/1991US5019669 Alkylation of organic aromatic compounds
05/24/1991CA2003779A1 Catalyst for dehydrohalogenation
05/22/1991EP0427957A2 Alkinyl-substituted liquid crystals
05/22/1991EP0427837A1 Ring compounds
05/22/1991EP0427829A1 Trifluorotoluol compounds and liquid crystalline medium
05/16/1991WO1991006522A2 Phenylcyclohexanes and liquid crystalline media
05/15/1991EP0427603A1 Process for the preparation of fluorinated aromatic compounds and catalysts based on Lewis-acids
05/15/1991EP0427040A1 Paper-coating compositions comprising whitening agents
05/15/1991EP0426815A1 Fluorinated biphenyl derivatives.
05/14/1991US5015792 Preparation of 4,4'-dibromobiphenyl
05/14/1991US5015685 Fireproofing agents for polymers formed by bromination of tetralin in the presence of a catalyst and mixing with polymers
05/08/1991EP0425624A1 Fluorinated cyclohexyl derivatives
05/08/1991DE4034508A1 Phenyl-cyclohexane(s) with terminal 2,2-di:fluorovinyl gps. - useful as components of liq. crystal media for electro-optical displays
05/08/1991DE3936823A1 New 1,2-di:aryl-3-chloro-propene cpds.
05/07/1991CA2029328A1 Process for preparing fluorinated aromatic derivatives with a lewis acid catalyst
05/05/1991CA2029220A1 Brightener-containing paper-coating compositions
05/02/1991EP0424847A1 The method for parallel-producing 2,5-dichlorotoluene and 2,6-dichlorotoluene
05/02/1991DE3935861A1 Verfahren zur herstellung von fluorbenzolen und fluortoluolen Process for the preparation of fluorobenzenes and fluortoluolen
04/1991
04/30/1991US5011947 Antihypercholesterolemic alkylene compounds
04/28/1991WO1991006523A1 Method of preparation of fluorobenzenes and fluorotoluenes
04/28/1991WO1991006518A1 Method of preparation of fluorobenzenes
04/28/1991CA2070412A1 Process for the preparation of fluorobenzenes
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