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Patent Searching and Data


Matches 401 - 450 out of 5,451

Document Document Title
WO/1999/026950A1
Impure tetra(dihydrocarbylamino)phosphonium halide is contacted with a liquid cyclic ether to dissolve the phosphonium halide and leave at least a portion of the impurities comprising at least quaternary ammonium halide or an amidophosph...  
WO/1999/024385A1
The invention relates to fluorinated phenanthrene derivatives of formula (I), wherein G1 represents -CH=CH- or -CH¿2?CH¿2?-, X represents H or F, Y represents H or F, and R?1¿, M¿1?-A¿1?-R?2¿ represent mesogene radicals. The deriva...  
WO/1999/021816A1
Liquid-crystal compounds combining an extremely large negative value of permittivity anisotropy with a small value of optical anisotropy; a liquid-crystal composition containing the same; and a liquid-crystal display element formed from ...  
WO/1999/021932A1
New starting materials and methods are used to make materials with low dielectric constant through the processes of transport polymerization or chemical vapor deposition. The starting materials and precursors are designed to provide poly...  
WO/1999/021924A1
Fluorinated chemical precursors, methods of manufacture, polymer thin films with low dielectric constants, and integrated circuits comprising primarily of sp?2¿C-F and some hyperconjugated sp?3¿C-F bonds are disclosed in this invention...  
WO/1999/021936A1
A polymer electroluminescent device (1) comprises an electroluminescent layer (7) of a poly(1,4-phenylenevinylene) having aryl-1,4-phenylene units, where the aryl group is a phenyl, naphthyl or biphenylyl group. Using such a poly(1,4-phe...  
WO/1999/021815A1
Liquid-crystalline compounds having a large negative value of permittivity anisotropy and a small value of optical anisotropy; a liquid-crystal composition containing the same; and a liquid-crystal display element formed from the liquid-...  
WO/1999/019420A2
A ferroelectric liquid crystal mixture, especially useful for operation in the $g(t)V¿min?-mode, comprises a 5-Arylindane derivative of formula (I), wherein Y is CH, CF or N and R?1¿(-A?1¿-M?1¿)¿a?(-A?2¿-M?2¿)¿b?-, (M?3¿-A?3¿-)...  
WO/1999/015129A2
Selective inhibitors of the cPLA¿2? enzymes are provided which are of use in controlling a wide variety of inflammatory diseases. The inhibitors of the present invention have general formula (i), where (R?1¿), p, D, Y, Z, R?a¿, R?b¿ ...  
WO/1999/006339A1
The invention concerns a method for preparing substituted benzyl bromides of general formula (I), wherein at least one substituent R?1-5¿ represents an electroattractive group, such as fluorine, chlorine, bromine, C¿1?-C¿4? alkoxycarb...  
WO/1998/056743A1
The invention relates to a continuous method for producing primary or secondary alcohols by reducing the corresponding aldehydes or ketones with a secondary aliphatic alcohol as the hydrogen donor, in the presence of a catalyst. The redu...  
WO/1998/055429A1
A method of fluorinating an organic compound comprising reacting an organic compound with a fluorinating agent characterised in that a perfluorocarbon compound is present in the reaction medium. The perfluorocarbon compound may replace a...  
WO/1998/047862A1
The invention relates to 3-cyano-2,4,5-trifluoro-benzoyl fluoride and intermediate products for the production thereof and a method for the production of 3-cyano-2,4,5-trifluoro-benzoyl fluoride starting from 5-fluoro-1,3-xylol (VIII), w...  
WO/1998/046547A1
A process is disclosed for preparing 2-aryl-substituted indenes by reacting an indene with an arene compound substituted with an halogen atom, preferably a iodine atom, or with an organosulphonate group, said reaction being carried out i...  
WO/1998/046647A1
The invention concerns a novel method for preparing non-toxic resins cross-linkable under radiation in the presence of an initiator system. Said resins are prepared from compositions of organic and/or silicon type comprising monomers, ol...  
WO/1998/042676A1
The invention relates to a process for preparing a compound of formula (I), comprising reacting a bromo-substituted pyridine with an amine of the formula NHR?5�R?6�, reacting the resulting amide with an iodo-halomethyl-substituted co...  
WO/1998/041491A1
Flame retardants comprising oligomeric bromine-containing compounds comprising aryl groups that are connected by aliphatic chains are described. Flame retardant compositions comprising the flame retardants of the present invention and fl...  
WO/1998/040336A1
Novel liquid crystal compounds having a particularly large refractive index anisotropy value and an excellent compatibility with other liquid crystals. The compounds are represented by general formula (1): wherein H�1?, H�2?, H�3?,...  
WO/1998/039287A1
The present invention relates to benzanthrones and benzanthrone derivatives having antiviral properties and to antiviral compositions that include at least one benzanthrone or benzanthrone derivative having antiviral properties. Benzanth...  
WO/1998/035924A1
Novel liquid-crystalline compounds which can impart desirable properties to liquid-crystal compositions mainly for use in the TFT, STN, and TN display systems, in particular liquid-crystalline compounds having excellent compatibility at ...  
WO/1998/033752A1
Novel 2-substituted 7-haloindenes and methods for synthesizing such indenes are described. The 2-substituted 7-haloindenes may be coupled with any aryl group to produce a metallocene catalyst intermediate.  
WO/1998/032532A1
A catalyst for halogen-fluorine exchange reactions of aromatic compounds essentially consists of a mixture of one or more compounds (a) and at least one compound (b), (c) and/or (d). (a) is an amidophosphonium salt of formula (I), in whi...  
WO/1998/032722A1
Electrically and chemically stable liquid crystal compounds having a good compatibility with conventional liquid-crystal compounds even at low temperature while maintaining a high voltage retention and a large $g(D)$g(e) and being repres...  
WO/1998/027037A1
1,3-difluoronapthalene derivatives of the formula (I): R�1?(-A?1�-M?1�)�a?(-A?2�-M?2�)�b?-B(-M?3�-A ?3�)�c?(-M?4�-A?4�)�d?-R?2�, in which B is (II) and R?1�(-A?1�-M?1�)�a?(-A?2�-M?2�) and (-M?3�-...  
WO/1998/027042A1
5,7-difluoro-1,2,3,4-tetrahydronaphthalene derivatives of formula (I): R?1�(-A?1�-M?1�)�a?(-A?2�-M?2�)�b?-B(-M?3�-A ?3�)�c?(-M?4�-A?4�)�d?-R?2� in which B (i) is and R?1�(-A?1�-M?1�)�a?(-A?2�-M?2�)...  
WO/1998/027179A1
1,1,5,7-tetrafluoro-1,2,3,4-tetrahydronaphthalene derivatives of the formula (I): R?1�(-A?1�-M?1�)�a?(-A?2�-M?2�)�b?-B(-M?3�-A ?3�)�c?(-M?4�-A�4?)�d?-R?2�, in which B is formula (II) and R?1�(-A?1�-M?1�)...  
WO/1998/027038A1
1,3,5-Trifluoronaphthalene derivative of the formula (I): R ?1�(-A?1�-M?1�)�a?(-A?2�-M?2�)�b?-B(-M?3�-A? 3�)�c?(-M?4�-A?4�)�d?-R?2�, in which B is (1) and R?1�(-A?1�-M?1�)�a?(-A?2�-M?2�) and (-M?3...  
WO/1998/027036A1
Liquid-crystal compounds represented by general formula (1) and a liquid-crystal composition containing any of the compounds, wherein R?1� represents C�1-15? alkyl; rings A?1�, A?2�, and A?3� each independently represents trans...  
WO/1998/027035A1
Fluorinated phenantrene derivatives of the formula (I), in which G means -CHF-CH�2?-or -CF=CH-; E?1�, E?2�, E?3�, E?4�, E?5�, E?6� are identical or different and mean -CH-, -CF- or -N-; and R?1�(-A?1�-M?1�)�a?(-A?2...  
WO/1998/023562A1
Liquid crystal compounds which exhibit not only negative anisotropy of permittivity but also extremely high voltage retention and low threshold voltages, are extremely reduced in the temperature dependence of these properties, difficultl...  
WO/1998/023561A1
Liquid-crystal compounds having excellent physical properties and excellent compatibility with other liquid-crystal materials; a liquid-crystal composition containing the compounds; and liquid-crystal display elements prepared from the c...  
WO/1998/023563A1
Liquid crystal compounds which exhibit not only a negative anisotropy of permittivity but also extremely high voltage retention and low threshold voltages, are reduced in the temperature dependence of these properties, difficultly exhibi...  
WO/1998/023564A1
Liquid-crystalline compounds which have an extremeley high voltage retention, an extremely small temperature dependence of the retention, a low threshold voltage, and a large value of $g(D)n; a liquid-crystal composition containing any o...  
WO/1998/022413A1
A mixture of (i) finely-divided alkali metal fluoride (e.g., KF), (ii) haloaromatic compound having at least one halogen atom of atomic number greater than 9 on an aromatic ring (e.g., C�6?Cl�6?), and (iii) an aminophosphonium cataly...  
WO/1998/022475A1
The reaction of a fluorophenyl Grignard with a boron trihalide to produce a borane is described.  
WO/1998/022470A1
Pentafluorophenyl Grignard reagents are reacted with a boron trihalide in a non-ethereal solvent such as toluene to produce a tetrakis-pentafluorophenyl borate magnesium halide.  
WO/1998/017611A1
A method for synthesizing bromopentafluorobenzene from hexafluorobenzene is described.  
WO/1998/016486A1
A process for the preparation of a substituted aromatic compound in which a chloroaromatic compound and an alkyl-, alkenyl- or aryl-boronic acid, ester or anhydride are coupled in the presence of palladium and a lipophilic aliphatic phos...  
WO/1998/014418A1
Liqud crystal compounds and liquid crystal compositions which are best suited as a liquid crystal material required to have negative permittivity including an IPS mode. The compounds are represented by general formulae (1) and (1-1), whe...  
WO/1998/013323A1
A liquid-crystal compound which exhibits high voltage retention and low threshold voltage, has very small dependency upon the temperature, has a large $g(D)n value, and has excellent compatibility with other liquid-crystal materials at l...  
WO/1998/013324A1
Liquid-crystal compounds which exhibit an extremely high voltage retention scarcely dependent on the temperature and a large $g(D)n value and are excellent in the compatibility with other liquid-crystal materials particularly at low temp...  
WO/1998/013321A1
There is herein disclosed a compound represented by general formula (1) wherein R�1? is an alkadienyl group having 4 to 10 carbon atoms in which a hydrogen atom may be substituted by a fluorine atom or the like; R�2? is an alkenyl gr...  
WO/1998/013322A1
A liquid-crystal compound which exhibits high voltage retention and low threshold voltage, has very small dependency upon the temperature, has a large $g(D)n value, and has excellent compatibility with other liquid-crystal materials at l...  
WO/1998/008792A1
A tetracyclic compound expressed by general formula (1) wherein H�1? to H�12? represent hydrogen atom at least one of which is replaced by a halogen atom, when either H�6? or H�8? is replaced by a halogen atom, at least one of th...  
WO/1998/008788A1
A two step bromination process for manufacturing a polybrominated indane product such as octabromophenyl indane comprises the steps of: (a) forming an intermediate by reacting an indane compound with bromine, under reaction conditions so...  
WO/1998/008791A1
There are herein disclosed a fluorovinyl derivative compound represented by general formula (1) and having characteristics of a liquid crystal, a liquid crystal composition, and a liquid crystal display device formed by using this compos...  
WO/1998/007674A1
There are herein disclosed a difluorophenyl derivative compound having characteristics of a liquid crystal represented by general formula (1), a liquid crystal composition and a liquid crystal display device in which the composition is u...  
WO/1998/005610A2
A process is disclosed for preparing fluorine-containing compounds by reacting a compound which contains a halogen that can be replaced by fluorine with a fluoride or a mixture of fluorides of general formula (I): MeF, in the presence of...  
WO1998004508A1
Selective IgE production inhibitors which contain substances inhibiting the production of IgE in the process of the differentiation of matured B cells into antibody-producing cells and the production of the antibody thereby while not or ...  
WO/1998/002409A1
The halogenation of a compound of formula (1) or formula (2'), wherein Q is an NH�2? group optionally in the form of an addition salt, or an NHCOCH�3? group, and X is a halogen atom, using a compound of formula X�2?, in a solvent s...  

Matches 401 - 450 out of 5,451