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Patent Searching and Data


Matches 401 - 450 out of 5,382

Document Document Title
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/1998/032722A1
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/1998/032532A1
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/1998/027036A1
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/1998/027038A1
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/1998/027042A1
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/1998/027037A1
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/1998/023564A1
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/1998/023563A1
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/1998/023561A1
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/1998/023562A1
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/1998/022470A1
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/1998/022475A1
The reaction of a fluorophenyl Grignard with a boron trihalide to produce a borane is described.  
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/1998/017611A1
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/1998/008791A1
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/1998/008788A1
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/1998/007674A1
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...  
WO/1997/046534A1
The invention relates to a process for producing substituted aryl pyrazoles of general formula (I) in which R1, R2, R3 and R4 have the meanings given in the description, and novel intermediate products for producing said aryl pyrazoles.  
WO/1997/045389A1
Disclosed is a method of making 1,2,4-trichlorobenzene. Dichlorobenzene containing less than an isomeric amount of meta-dichlorobenzene is isomerized to produce an isomeric mixture of dichlorobenzenes substantially rich in meta-dichlorob...  
WO/1997/041083A1
Compounds containing a primary amino group are converted into compounds containing a fluorine atom in place of the amino group by reaction of the amino compound with hydrogen fluoride and a nitrosating reagent under the influence of ultr...  
WO/1997/034855A1
Liquid crystalline compounds expressed by formula (1), liquid crystal compositions thereof obtained by combination with specified liquid crystal compounds, and liquid crystal display devices using them, wherein A1, A2, A3 and A4 denote e...  
WO/1997/034589A1
The present invention provides a class of chemical compounds useful as efficacious drugs in the treatment of sickle cell disease and diseases characterized by unwanted or abnormal cell proliferation. The active compounds are substituted ...  
WO1997020877A3  
WO/1997/032832A1
The production of fluorinated aromatic compounds of general formula (I), in which W, X, Z, R1 and R2 have the meanings given in the description, from corresponding C1 or Br-containing compounds with fluorides, e.g. KF, with halogen excha...  
WO/1997/026237A1
Novel aromatic polycyclic retinoid-type derivatives of general formula (I), wherein groupings R3 and R4 attached to the double bond between carbons 11 and 12 are cis groupings, and pharmaceutical and cosmetic compositions containing same...  
WO/1997/020877A2
Poly(bis-9,9'-fluorenes) are disclosed with identical or different recurring structural elements of formula (I), in which the two R1 groups independently of one another stand for H, C1-C18-alkyl, C6-C14-aryl, C7-C15-aralkyl, C1-C18-alkox...  
WO/1997/018893A1
The present invention relates to a catalyst for preparing para-chloro aromatic compounds by the liquid-phase chlorination method. The catalyst is prepared by loading transition metal salts, rare earth metal salts or a mixture thereof, an...  
WO/1997/016406A1
A compound of the formula (I): A-L-D where A is a moiety which absorbs radiation and enters an excited state in which it accepts an electron; L is a linking group which tethers an electron acceptor moiety A to the electron donor moiety D...  

Matches 401 - 450 out of 5,382