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| Number | Title | Issue Date |
| 7309395 | System for forming composite polymer dielectric film A system for depositing a composite polymer dielectric film on a substrate is disclosed, wherein the composite polymer dielectric film includes a low dielectric constant polymer layer disposed between a first silane-containing layer and a second silane-containing la... | 12/18/2007 |
| 7238832 | Production method of a coupling compound There is provided a method for producing a coupling compound of formula (1): (Y—)(n−1)R1—R2—(R1)(n′−1) (1) wherein R1, R2 n and n′ are as defined belo... | 07/03/2007 |
| 7214838 | Method for transferring TCPX into TFPX A method for transferring TCPX (α, α, α′, α′-tetrachloro-p-xylene) into TFPX (α, α, α′, α′-tetrafluoro-p-xylene) is disclosed, which comprises the following steps: (a) providing a first reactant comprising TFPX; (b) mixing the first reactant with alk... | 05/08/2007 |
| 7214815 | Metallic copper catalyst for polyfluoroalkylethyl iodide production and process for producing polyfluoroalkylethyl iodide The present invention provides a metallic copper catalyst for use in an ethylene addition reaction to polyfluoroalkyl iodides, a process for efficiently producing a polyfluoroalkylethyl iodide using such a metal copper catalyst in an ethylene addition reaction to a ... | 05/08/2007 |
| 7173159 | Method for synthesizing TFPX A method for the synthesis of TFPX (α, α, α′, α′-tetrafluoro-p-xylene) is disclosed, which comprises the following steps: (a) providing a sulpholane solution comprising TCPX (α, α, α′, α′-tetrachloro-p-xylene); (b) mixing the sulpholane solution with... | 02/06/2007 |
| 7148384 | Preparation of fluorinated acetophenones The invention relates to a process for preparing fluorinated acetophenones from fluorinated aryl compounds in the presence of N-hydroxyphthalimide and the use thereof. ... | 12/12/2006 |
| 7145046 | Production of fluorine compounds Inorganic and organic compounds containing fluorine can be produced, for example, from corresponding chlorine-containing compounds by chlorine/fluorine exchange using fluorinating agents. Monocyclic or bicyclic compounds containing at least two nitrogen atoms, at le... | 12/05/2006 |
| 7041859 | Method for halogenating or radiohalogenating a chemical compound A method for obtaining a halogenated organic compound, whereby an organotrifluoroborate compound is reacted with a halide ion in the presence of an oxidizing agent to produce the corresponding halogenated organic compound. The method may be used for producing radioh... | 05/09/2006 |
| 7022865 | Pyrans as liquid crystals A tetrahydropyran derivative comprising at least three cyclic rings and one aromatic endgroup of the formula A a process for preparing said tetrahydropyran derivatives, and the use of said tetrahydropyran derivatives as... | 04/04/2006 |
| 6955837 | Phenylcyclohexanes and a liquid-crystalline medium Novel phenylcyclohexanes of the formula I in which n is 0 to 7, Q1 and Q2 are H, or one of these radicals is alternatively CH3, r is 0, 1, 2, 3, 4 or 5, A is trans-1,4-cyclohexylene, 1,... | 10/18/2005 |
| 6908722 | Acid generator, sulfonic acid, sulfonic acid derivatives and radiation-sensitive resin composition A novel photoacid generator containing a structure of the following formula (I), wherein R is a monovalent organic group with a fluorine content of 50 wt % or less, a nitro group, a cyano group, or a hydrogen atom, and... | 06/21/2005 |
| 6908645 | Liquid-crystalline medium The invention relates to liquid-crystalline compounds of the formula I and to a liquid-crystalline medium based on a mixture of polar compounds, characterized in that it comprises one or more compounds of the general formula I | 06/21/2005 |
| 6875894 | Bis(alkylthio)carbenium salts The invention relates to bis(alkylthio)carbenium salts of the formula I with the stated definitions for R1, R2, R3 and Y−, and to a process for the preparation th... | 04/05/2005 |
| 6872861 | Process for preparing polyfluoroalkylithium compounds The invention relates to a process for preparing polyfluoroalkyl-lithium compounds by deprotonation of polyfluoroalkyl compounds by means of lithium bases. ... | 03/29/2005 |
| 6784327 | Process for the production of fluorinated organic compounds and fluorinating agents A process for the production of a fluorinated organic compound, characterized by fluorinating an organic compound having a hydrogen atoms using IF5; and a novel fluorination process for fluorinating an organic compound having a hydrogen atoms by using a f... | 08/31/2004 |
| 6781021 | Method for isomerizing halogenated aromatics A catalyst composition with a high halogenated aromatics isomerization activity, a halogenated aromatic isomerization method using said catalyst composition, and a halogenated aromatics isomerization method capable of prolonging the life or regeneration period of th... | 08/24/2004 |
| 6753444 | Method for producing 2,3,5,6-tetrahalogen-xylyidene compounds The invention relates to a process for preparing 2,3,5,6-tetrahaloxylylidene compounds of formula (I) where each Hal is independently fluorine or chlorine, and X is fluorine, chlorine, bromine, —O—R, or —O—C(═O... | 06/22/2004 |
| 6706934 | Method for producing 2,3,4,5-tetrachlorobenzotrifluoride Disclosed herein is a method for producing 2,3,4,5-tetrachlorobenzotrifluoride comprising chlorinating 4-chlorobenzotrifluoride with elemental chlorine, in the presence of from 0.1 to 2% by weight of iron(III) chloride and 0.05 to 0.75% by weight of aluminum(III) ch... | 03/16/2004 |
| 6653515 | Synthesis of , ଲ, ଲ-trifluorostyrene via in-situ formation of trifluorovinyl metal halide ,ଲ,ଲ-Trifluorostyrene and derivatives thereof synthesized in two steps from 1,1,1,2-tetrafluoroethylene. In the first step, 1,1,1,2-tetrafluoroethylene is reacted with a base, a metal salt such as zinc chloride and an optionally amine t... | 11/25/2003 |
| 6635318 | Tetracyclic and pentacyclic compounds, and their use in liquid-crystalline media Disclosed is a tetracyclic compound of the formula I ##STR1## in which R1, R2 are each, independently of one another, an alkyl or alkenyl radical having up to 15 carbon atoms which is unsubstituted, monosubstituted by CN or CF | 10/21/2003 |
| 6613948 | Process for the preparation of 2,3,4,5-tetrafluorobenzene derivatives 2,3,4,5-tetrafluorobenzene derivatives can be obtained in a particularly advantageous manner by reacting the corresponding chlorobenzene or (chloro, fluoro)-benzene derivatives with a fluorinating agent in the presence of a solvent and a catalyst at eleva... | 09/02/2003 |
| 6599590 | Fluoro-substituted alkenyl compounds, liquid crystal compositions, and liquid crystal display elements The invention relates to a fluoro-substituted alkenyl compound represented by formula (1) ##STR1## wherein Y1, Y2, Y3 and Y4 are each independently H or F, provided that at least one of Y1 and Y2... | 07/29/2003 |
| 6544604 | Liquid crystalline compound having difluoropropyleneoxy group as bonding group, liquid crystal composition and liquid crystal display element The present invention provides a liquid crystalline compound having a difluoropropyleneoxy group as a bonding group, which is represented by Formula (1): ##STR1## wherein R1 and R2 each independently represent hydrogen, halogen, ... | 04/08/2003 |
| 6509495 | Selective hydrodehalogenation method The invention concerns a selective hydrodehalogenation method characterised in that it comprises a step which consists in contacting a substrate including a sp 3 hybridisation carbon atom bearing an electro-attracting group and at least a fluorine atom, a... | 01/21/2003 |
| 6506951 | Process for producing brominated trifluoromethylbenzenes The invention relates to a process for producing a brominated trifluoromethylbenzene represented by the general formula (1). This process includes brominating in a liquid or gas phase a trifluoromethylbenzene, represented by the general formula (2), by br... | 01/14/2003 |
| 6392097 | Process for the preparation of derivatives of octafluoro-[2,2] paracylophane Processes for the preparation of parylene dimers, and more particularly to processes for the preparation of derivatives of octafluoro-[2,2]paracylophane, otherwise known as AF4.... | 05/21/2002 |
| 6392111 | Method for producing olefins Olefins containing aromatic substituents are synthesized without the addition of phosphonium salts or phosphanes with the aid of a PdII compound as a catalyst in the presence of nitrogen-containing additives such as N,N-dimethylglycine and a ba... | 05/21/2002 |
| 6384289 | Process for production of 1,4-bis(difluoroalkyl)benzene derivative A process is provided which allows a 1,4-bis(difluoroalkyl)benzene derivative to be produced inexpensively by a simple procedure without requiring any special facility. This process comprises causing a compound (A) of the following formula (1): ##STR... | 05/07/2002 |
| 6365676 | Poly-perfluoroalkyl substituted polyamines as grease proofing agents for paper and foam stabilizers in aqueous fire-fighting foams The invention concerns a process for the reaction of a perfluoroalkyl iodide of the formula CF3 (CF2)h --I, where h is an integer from 4 to 18, with a compound having a terminal olefinic group, which comprises conducting s... | 04/02/2002 |
| 6355849 | Process of use in perfluoroalkyation and reactant for making use of this process The subject-matter of the present invention is a process of use in perfluoroalkylation and a reactant for making use of this process. This process is defined in that it comprises a stage in which a material of formula RfH and a base (or a species capable ... | 03/12/2002 |
| 6350925 | Perhaloethyl aromatic compounds and perhaloethenyl aromatic compounds therefrom A synthesis is provided for ,ଲ-difluoro-ଲ-halo-ethenyl aromatic compounds such as ,ଲ,ଲ-trifluorostyrenes by a process of reacting CFX2 CFXI, wherein each X is independently F or Cl, provided that at least o... | 02/26/2002 |
| 6329027 | Chlorobenzene derivatives, liquid-crystal composition, and liquid-crystal display elements Provided are liquid crystalline compounds having excellent physical properties and being excellent in miscibility with other liquid crystal materials; liquid crystal compositions comprising the crystalline compound; and liquid crystal display device fabri... | 12/11/2001 |
| 6300532 | Process for addition of haloalkanes to alkenes catalyzed by an organophosphite compound A process for catalytic addition of haloalkanes to alkenes involving the step of reacting the haloalkane with the alkene in the presence of a catalyst. The catalyst is an organophosphite compound represented by the following formula: P(ORa)(OR | 10/09/2001 |
| 6248260 | Liquid-crystal compounds having fluorinated alkyl groups, liquid-crystal composition, and liquid-crystal display element Provided are liquid crystalline compounds which are excellent in the miscibility with existing liquid crystalline compounds even at low temperatures and are electrically and chemically stable while having a high voltage holding ratio and a high Ɗ.di-elec... | 06/19/2001 |
| 6242645 | Thermally stable aminosulfur trifluorides Diaryl-, dialkoxyalkyl-, alkylalkoxyalkyl-, arylalkoxyalkyl- and cyclic aminosulfur trifluorides fluorinating agents are disclosed.... | 06/05/2001 |
| 6231785 | Benzene derivative and its production method A method of producing a difluorobenzyl ether derivative (6) ##STR1## ##STR2## in which a benzene derivative (1) is reacted with a base to form carbanion which is in turn reacted with a difluoromethane derivative (2) to give a benzene derivative (3) w... | 05/15/2001 |
| 6222064 | Fluorination with aminosulfur trifluorides A fluorination method of oxygen and halogen sites with diaryl-, dialkoxyalkyl-, alkylalkoxyalkyl-, arylalkoxyalkyl- and cyclic aminosulfur trifluorides fluorinating reagents is disclosed.... | 04/24/2001 |
| 6210603 | Fluorine-substituted benzene derivative, liquid-crystal composition, and liquid-crystal display element Liquid crystalline compounds are provided which have an extremely high voltage holding ratio, altered only slightly by change of temperature, and which have a low threshold voltage and a high Ɗn. Also provided are liquid crystal compositions containing t... | 04/03/2001 |
| 6194620 | Dichloro tetraflouro-{2,2}-paracyclopane, a process for manufacturing thereof and poly-, -difluoro-chloro-para-xylylene film prepared therefrom Dichloro-tetrafluoro-[2,2]-paracyclophane (formula I), which is a novel compound useful as a material for forming a coating film by chemical vapor deposition, and a process for manufacturing thereof and poly--difluoro-chloro-para-xylylene fi... | 02/27/2001 |
| 6190576 | Liquid crystal compounds, liquid crystal compostions containing the compounds, and liquid crystal display devices made by using the compositions The invention is to provide liquid crystalline compounds which have a low viscosity, high negative dielectric anisotropy, high resistivity, and high voltage holding ratio, and are stable against heat and ultraviolet light; to provide liquid crystal compos... | 02/20/2001 |
