Patents
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Patents for C07C 25 - Compounds containing at least one halogen atom bound to a six-membered aromatic ring (5,308)
09/1990
09/26/1990EP0388427A1 Continuous decomposition of diazonium fluorides.
09/22/1990CA2011002A1 Preparation of aliphatically substituted fluorobenzenes
09/18/1990CA1274253A1 Method for selective separation of 2,6- dichlorotoluene
09/12/1990EP0387080A1 Alkylation of organic aromatic compounds
09/12/1990EP0387032A1 Trifluorobenzene derivatives and liquid crystal compositions containing the same
09/11/1990CA1273937A1 Phenyl pyridones and thiopyridones
09/10/1990CA2011858A1 Alkylation of organic aromatic compounds
09/07/1990WO1990009972A1 Fluoroalkyl derivative and production thereof
09/05/1990EP0385874A1 Functionalisation at position (n+1) of aryl derivatives disubstituted at position n and (n+2)
09/04/1990CA1273644A1 Process for preparation of halogenated benzene derivatives
09/03/1990CA2011348A1 Process for functionalizing n and (n+2) disubstituted arylic derivatives in the (n+ 1) position
08/1990
08/22/1990CN1044808A Method for bromination of aromatic and heterocyclic compounds containing acceptor groups
08/21/1990US4950817 Process for the preparation of 4,4'-dihalobiphenyls
08/21/1990US4950813 Preparation of substituted benzotrichlorides
08/21/1990US4950796 Chemical intermediates for insecticides, acaricides
08/18/1990WO1990009420A1 Liquid crystalline media containing fluorinated oligophenyls
08/18/1990CA2027557A1 Liquid crystalline media containing fluorinated oligophenyls
08/16/1990EP0381728A1 Difluoromethyl compounds.
08/16/1990EP0381702A1 Novel method for oxyiodination product partial purification.
08/15/1990CN1044648A Improved hydrogenolysis/dehydrohalogenation process
08/09/1990WO1990008748A1 Improved hydrogenolysis/dehydrohalogenation process
08/09/1990DE3913554A1 New bi:phenylyl:ethane cpds. - for use in liq. crystal phases having large optical anisotropy and increased stability
08/09/1990DE3902328A1 Biphenylylethanes
08/07/1990US4946986 Cyclohexene derivatives
08/07/1990CA1272448A1 Pharmaceutical composition containing at least one benzonorbornen derivative as active principle
08/03/1990CA2009188A1 Hydrogenolysis/dehydrohalogenation process
08/01/1990EP0380392A2 Derivatives of benzocycloalkenyl dihydroxyalkanoic acids, methods of making them and phrmaceuticals containing them
08/01/1990EP0380365A1 Method for recovering hydrobromic acid and methanol
08/01/1990EP0379512A1 Oxyiodination incorporating an iodine generator for the conversion of methyl iodide to iodine.
08/01/1990EP0257049B1 Chiral compounds
07/1990
07/28/1990WO1990008757A1 Diphenylylethanes and liquid crystalline phase
07/28/1990WO1990008756A1 Diphenylethanes
07/28/1990CA2026112A1 Biphenylylethanes
07/28/1990CA2026110A1 Biphenylylethanes and liquid-crystalline phase
07/26/1990WO1990008119A1 Phenyl naphthalenes having liquid crystalline properties
07/26/1990WO1990008118A1 Production of dichlorobenzene with high para to ortho ratios
07/24/1990US4943384 Cyclohexane derivatives
07/19/1990DE3901266A1 Fluorine-containing aromatic compounds
07/17/1990US4942268 Halogenation an aromatic compound in the presence of a zeolite catalyst
07/17/1990US4942246 Process for producing 4-benzoyl-5-hydroxypyrazoles
07/12/1990WO1990007479A1 Method of obtaining bromated aromatic and heterocyclic combinations containing acceptor groups
07/11/1990EP0377516A2 Liquid crystal compounds having high optical anisotropy
07/11/1990EP0377469A1 A liquid crystalline compound
07/11/1990CA2005485A1 Production of dichlorobenzene with high para to ortho ratios
07/04/1990EP0376856A1 Preparation of biaryl compounds
07/03/1990US4938792 Azole derivatives and agricultural and horticultural chemical composition containing the same
06/1990
06/26/1990US4937397 Preparation of halofluorobenzenes
06/26/1990US4937395 Process for the preparation of fluorobenzenes
06/19/1990US4935563 Contacting with a tertiary amine, extraction
06/19/1990US4935562 Method for producing 4,4'-dibromobiphenyl
06/19/1990US4935560 Novel tetrahydronaphthalene & indane derivatives
06/14/1990WO1990006295A1 Preparation of biaryl compounds
06/13/1990EP0372621A1 Preparation of difluorobenzenes containing electron withdrawing substituents
06/13/1990EP0372262A1 Method for the destillative processing of mixtures containing side chain chlorinated alkylaromatics
06/13/1990CN1042897A Alkylation of polycyclic aromatic compounds to alkylates enriched in para-substituted isomers
06/06/1990EP0371563A1 Preparation of halofluorobenzenes
06/05/1990US4931589 Benzonorbornene derivatives, processes for their preparation and medicinal and cosmetic compositions containing them
06/05/1990US4931167 Degradation of polychlorinated biphenyls
05/1990
05/31/1990CA2002598A1 Preparation of biaryl compounds
05/30/1990EP0370081A1 Chiral or achiral cyclic compounds
05/30/1990CN1042535A Technology for phenyl fluorenol (an antimalarial) synthesis
05/29/1990US4929786 Preparation of 1-aryl-1-alkenes
05/29/1990US4929784 Process for the preparation of optionally substituted benzyl-benzenes
05/28/1990CA2003918A1 Preparation of halofluorobenzenes
05/23/1990DE3839213A1 Bis(difluorophenylene) derivatives
05/16/1990EP0368063A1 Process for the chlorination in the nucleus of aromatic hydrocarbons
05/16/1990EP0192767B1 Derivatives of diphenylhexafluoropropane
05/15/1990US4925994 Process for the ring chlorination of aromatic hydrocarbons
05/08/1990US4923580 A, a-dibromoalkylarenes, hydrogen bromide, hydrogen peroide
05/02/1990EP0365971A2 Method for the production of (substituted) benzyl-benzenes
05/01/1990CA1268485A1 Method for the synthesis of iodobenzene
05/01/1990CA1268484A1 Method for the synthesis of iodobenzene
05/01/1990CA1268473A1 Analogs of mevalonolactone and derivatives thereof, processes for their production, pharmaceutical compositions containing them and their use as pharmaceuticals
04/1990
04/25/1990EP0364548A1 Octafluorobiphenyls.
04/25/1990EP0364538A1 Difluorobenzol derivatives.
04/18/1990EP0363458A1 2,3-difluorobenzenes.
04/17/1990US4918251 Preparation of 2-halofluorobenzene
04/17/1990US4918215 4-halogenostilbene derivatives and processes for their preparation
04/17/1990US4917819 Good stability, low viscosity, large dielectric ansiotropy
04/11/1990EP0362318A1 2,3-difluorobiphenyls.
04/05/1990DE3909802A1 Difluormethylverbindungen Difluormethylverbindungen
04/04/1990EP0360829A1 Dehydrobromination of substituted alpha-halocumene.
04/03/1990US4914247 Process for preparing para-substituted halogenobenzene derivatives
03/1990
03/29/1990DE3831336A1 Tolans
03/28/1990EP0360043A1 p-Terphenyl derivatives and liquid crystalline compositions
03/28/1990EP0360042A1 p-Terphenyl derivatives and liquid crystalline compositions
03/27/1990US4912268 Diazotizing an aromatic amine in presence of hydrogen fluoride; thermally decomposition of aryldiazonium fluoride
03/27/1990CA1267153A1 Benzonorbornene derivatives; process for preparing the same and cosmetic compositions containing these derivatives
03/20/1990US4910350 Containing a 4-fluorophenyl substitution
03/14/1990EP0357739A1 Chiral derivatives of 1,2-difluorobenzene
03/14/1990EP0357671A1 Improved process for preparing aromatic fluorides.
03/14/1990EP0357610A1 Insecticidal cyclopropyl-substituted di(aryl) compounds.
03/13/1990US4908152 Cyclohexane derivative
03/13/1990CA1266672A1 Dyarylacetylenes, their preparation and their use
02/1990
02/21/1990CN1039797A Difluoromethyl compounds
02/20/1990US4902814 Chemical intermediates for insecticides and acaricides
02/20/1990EP0335953A4 Process for producing polybrominated higher alkylbenzenes.
02/14/1990EP0354444A2 Process for the introduction of fluorine on aromatic nucleus by nucleophilic exchange
02/14/1990EP0354434A2 Process for the preparation of rod-like compounds
02/08/1990WO1990001056A1 Difluoromethyl compounds
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