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| Number | Title | Issue Date |
| 7408088 | Process for separation of bromine from gaseous hydrogen bromide and use of such process in production of decabromodiphenylethane Bromine is scrubbed from a gaseous mixture of bromine and hydrogen bromide by passing the mixture into a mixture formed from (i) diphenylethane and/or partially brominated diphenylethane with average bromine number less than about 2 and (ii) a catalytic quantity of ... | 08/05/2008 |
| 7316738 | Milled submicron chlorothalonil with narrow particle size distribution, and uses thereof A method of milling chlorothalonil to form a sub-micron product having a narrow particle size distribution is presented. The milling involves wet milling of the chlorothalonil with high density milling media having a diameter between 0.1 mm and 0.8 mm, preferably be... | 01/08/2008 |
| 7312288 | Polymerizable fluorinated ester compounds and their preparing processes Polymerizable fluorinated ester compounds having formulae (1) and (2) are novel wherein R1 is H, methyl or trifluoromethyl, R2 and R3 are H or a monovalent hydrocarbon group, R2 and R3 may form a ring, R4 | 12/25/2007 |
| 7282615 | Catalyst compositions and their use for chlorinating aromatic compounds A method for ring-halogenating an aromatic compound comprises contacting the aromatic compound with chlorine or bromine in the presence of a catalyst composition, where the catalyst composition comprises at least one salt comprising a metal selected from the group c... | 10/16/2007 |
| 7102023 | Protecting groups useful in the synthesis of polysaccharides, natural products, and combinatorial libraries One aspect of the present invention relates to optionally substituted halogenated benzyl halides and the like. These compounds are useful as halogenated benzyl ether-based protecting groups for a variety of functional groups. Another aspect of the present invention ... | 09/05/2006 |
| 7060862 | Method for the preparation of α,α,α′,α′-tetrachloro-p-xylene with high purity A method of synthesizing a high purity product of α,α,α′,α′-tetrachloro-p-xylene is disclosed. The method includes carrying out a first stage reaction of terephthaldicarboxaldehyde with a mixture of SOCl2 and dimethylformamide (DMF) to obtain a pr... | 06/13/2006 |
| 6992231 | Method for the preparation of α,α, α′,α′-tetrachloro-p-xylene A synthesis method of α,α,α′,α′-tetrachloro-p-xylene is disclosed. The method includes reacting terephthaldicarboxaldehyde with a mixture of SOCl2 and dimethylformamide (DMF) to obtain a product mixture containing α,α,α′,α′-tetrachloro-p-x... | 01/31/2006 |
| 6943257 | Process for preparation of aromatic halides from aromatic amines The present invention provides a process for preparing an aromatic bromide or aromatic iodide from an aromatic amine derivative using nitrite anion and halodimethylsulfonium halide generated in situ from hydrobromic acid/DMSO or hydriodic acid/DMSO. The process for ... | 09/13/2005 |
| 6743825 | Poly(bromoaryl)alkane additives and methods for their preparation and use An additive mixture useful as a flame retardant is described. The mixture is comprised of (i) a poly(bromophenyl)alkane having in the molecule in the range of 13 to 60 carbon atoms and in the range of two to four aryl groups and (ii) a poly(bromophenyl)bromoalkane h... | 06/01/2004 |
| 6733883 | Fluorinated dendrons and self-organizing ultrahigh density nanocylinder compositions This invention relates to novel fluorinated dendrons and to a universal strategy for producing functional fluorinated dendrons programmed to self-assemble into supramolecular nanocylinder compositions containing p-stacks of high electron or hole mobility donors (D),... | 05/11/2004 |
| 6710217 | Method for producing 4-chlorobiphenyl and 4-chlorobiphenyl-specific specifications The invention relates to a process for preparing 4-chlorobiphenyl by (a) reacting biphenyl and chlorine in the presence of one or more ring-chlorination catalysts, and (b) subjecting the reaction mixture obtained in step (a) to fractional distillation ... | 03/23/2004 |
| 6610219 | Functional materials for use in optical systems Functional optical materials for optical systems that are typically useful in optical waveguides, optical switching systems, optical modulators, optical computing systems and the like. Included are polymer systems and electrooptical chromophores. Polymers... | 08/26/2003 |
| 6605409 | Positive resist composition A positive resist composition comprising (A) a compound generating a specific sulfonimide compound by irradiation with an actinic ray or a radiation and (B) a resin having a group, which is decomposed by the action of an acid to increase the solubility of... | 08/12/2003 |
| 6583307 | Convenient and efficient Suzuki-Miyaura cross-coupling catalyzed by a palladium/diazabutadiene system A Pd(OAc)2 /diazabutadiene system has been developed for the catalytic cross-coupling of aryl halides with arylboronic acids. A combination of the diazabutadiene DAB-Cy (1, N,N'-Dicyclohexyl-1,4-dizabutadiene) and Pd(OAc)2 was found ... | 06/24/2003 |
| 6566546 | Process for preparing 4-substituted 2-alkylbiphenyls and 2-alkoxylbiphenyls A process for preparing 4-substituted 2-alkylbiphenyls and 2-alkoxybiphenyls of the formula (I), ##STR1##... | 05/20/2003 |
| 6509507 | Polymerizable biaryls, process for their preparation and their use A process for preparing polymerizable biaryl derivatives comprises reacting an aromatic comprising a 6-membered ring which bears ester or benzylic OH groups in the 1,4 position with a second aromatic in a palladium-catalyzed cross-coupling reaction to giv... | 01/21/2003 |
| 6489524 | Selective bromination of aromatic compounds Aromatic substrates are Ar-brominated in high yield and selectivity by reacting the substrate with a brominating agent in the presence of at least about 0.19 gram per mmol of substrate of a zeolite catalyst which has an absorbed water content of no greate... | 12/03/2002 |
| 6388123 | Substituted phenyl keto enols as pesticides and herbicides The present invention relates to novel compounds of the formula (I) ##STR1## in which Het represents one of the groups ##STR2## in which A, B, D, G, V, W, X, Y and Z are as defined in the description, processes and intermediates for their preparation, and to ... | 05/14/2002 |
| 6369275 | Process for making diaryl pyridines useful as cox-2 inhibitors The invention encompasses a process for making compounds of Formula I useful in the treatment of cyclooxygenase-2 mediated diseases. ##STR1##... | 04/09/2002 |
| 6323373 | Polymerizable biaryls, method for the production and use thereof A process for preparing polymerizable biaryl derivatives comprises reacting an aromatic comprising a 6-membered ring which bears ester or benzylic OH groups in the 1,4 position with a second aromatic in a palladium-catalyzed cross-coupling reaction to giv... | 11/27/2001 |
| 6284894 | Preparation of allylic aromatic compounds A process for the preparation of an allylic aromatic compound in which an aromatic amine is reacted first with a nitrite and then with an allylic olefin having an eliminatable terminal substituent. Novel allylic derivatives of disubstituted benzene compou... | 09/04/2001 |
| 6265628 | Process for the continuous preparation of mono- and/or bis(mono-and/or di-and/or trichloromethyl) benzenes In a process for the continuous preparation of mono- and/or bis(mono- and/or di- and/or trichloromethyl) benzenes by gradual chlorination of the corresponding mono-or dimethylbenzenes in several reactors in cascade, the first reactor has a greater volume ... | 07/24/2001 |
| 6252001 | Ethynyl substituted aromatic compounds, synthesis, polymers and uses thereof Compounds of ethynyl aromatic compounds form polymers which have high thermal stability. The monomers are useful for coating a wide variety of substances such as dielectric coatings where high thermal resistance is desirable including electronic component... | 06/26/2001 |
| 6121495 | Ethynyl substituted aromatic compounds, synthesis, polymers and uses thereof Compounds of ethynyl aromatic compounds form polymers which have high thermal stability. The monomers are useful for coating a wide variety of substances such as dielectric coatings where high thermal resistance is desirable including electronic component... | 09/19/2000 |
| 6117361 | Liquid crystal compound having fluorine-substituted 1,4-phenylene moiety, liquid crystal composition and liquid crystal display element A compound represented by the following general formula (1) is provided. This has broader temperature range of nematic phase, lower viscosity and higher miscibility with other liquid crystal compounds at low temperature than those of conventional liquid c... | 09/12/2000 |
| 6057006 | Fluorocyclohexane derivatives, and liquid-crystalline medium The invention relates to fluorocyclohexane derivatives of the formula I ##STR1## in which R1, Z1, Z2, L1, L2, L3 and X are as defined as below: X is alkyl or alkoxy having 1 to 10 carbon at... | 05/02/2000 |
| 6008283 | Oligomeric flame retardant additive 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 flame retardant aids... | 12/28/1999 |
| 5998595 | Azidohalogenobenzyl derivatives, sugar compounds and protection of hydroxy groups Azidohalogenobenzyl derivatives of the formula (I) ##STR1## wherein A is a halogen atom, B is a halogen atom or a hydrogen atom, and X is a group reactive with a hydroxy group, methods of protecting hydroxy group(s) using said derivatives, and sugar ... | 12/07/1999 |
| 5977419 | Process for the preparation of substituted phenylpropenes The invention relates to novel processes for the preparation of phenyl acetic acid derivatives of the formula (I) some of which are known ##STR1## in which R1, R2 and R3 independently of each other each represent hydr... | 11/02/1999 |
| 5886242 | Polymerizable, chiral compounds and their use The invention relates to chiral compounds containing at least one divalent or polyvalent chiral group, at least one polymerizable group, at least one spacer and at least one mesogenic group, and to their use as polymerizable, chiral dopes for the preparat... | 03/23/1999 |
| 5841004 | 3-substituted-, ଲ-dibromoethylbenzene and process for preparing the same A novel 3-substituted ,ଲ-dibromoethylbenzene of formula (I): ##STR1## wherein X represents a halogen atom or a trihalomethyl group, which is useful as an intermediate for pharmaceuticals or agricultural chemicals, is prepared by a simple... | 11/24/1998 |
| 5833879 | Liquid crystalline alkynyltolan compound, liquid crystal composition and liquid crystal display element A novel liquid crystalline compound having a sufficiently large Ɗn, a superior, low temperature compatibility with other liquid crystals and a chemical stability; a liquid crystal composition containing the above compound; and a display element using the... | 11/10/1998 |
| 5831102 | Chemiluminescent 3-(substituted adamant-2'-ylidene) 1,2-dioxetanes Enzymatically cleavable chemiluminescent 1,2-dioxetane compounds capable of producing light energy when decomposed, substantially stable at room temperature before a bond by which an enzymatically cleavable labile substituent thereof is intentionally clea... | 11/03/1998 |
| 5746998 | Targeted co-polymers for radiographic imaging A radiographic imaging agent including a plurality of block copolymers forming a micelle, the block copolymers including a hydrophilic polymer linked to a hydrophobic polymer, and the hydrophobic polymer including a backbone incorporating radiopaque molec... | 05/05/1998 |
| 5686608 | Process for cross-coupling aromatic boron compounds with aromatic halogen compounds or perfluoroalkylsulfonates A process for preparing polycyclic aromatic compounds by cross-coupling aromatic boron compounds with aromatic halogen compounds or perfluoroalkylsulfonates in the presence of metallic palladium as catalyst comprises adding to the reaction a) at least one... | 11/11/1997 |
| 5589102 | Benzene derivatives, and liquid-crystalline medium Benzene derivatives of the formula I ##STR1## in which R, A1, A2 X, L1, L2 m and n are as defined in claim are suitable as components of liquid-crystalline media.... | 12/31/1996 |
| 5567410 | Composotions and methods for radiographic imaging A radiographic imaging agent including a plurality of block copolymers forming a micelle, the block copolymers including a hydrophilic polymer linked to a hydrophobic polymer, and the hydrophobic polymer including a backbone incorporating radiopaque molec... | 10/22/1996 |
| 5550236 | Process for cross-coupling aromatic boronic acids with aromatic halogen compounds or perfluoroalkylsulfonates A process for preparing polycyclic aromatic compounds by cross-coupling aromatic boronic acids with aromatic halogen compounds or perfluoroalkylsulfonates in the presence of metallic palladium, if desired applied to a support material, as catalyst, wherei... | 08/27/1996 |
| 5545768 | Process for the preparation of chlorofluronitrobenzenes and difluoronitrobenzenes A process for the preparation of chlorofluoronitrobenzenes and difluoronitrobenzenes, which comprises heating dichloronitrobenzene to not more than 200° C. in excess with an alkali metal fluoride having a total water content of about 0.2 to about 2.5% by... | 08/13/1996 |
| 5478497 | Tetracyclic compounds and liquid crystalline mixtures containing them Compounds of the formula ##STR1## wherein rings A, B and C, Z1, Z2, Z3, R1, R2 and R3 are defined in the specification, their manufacture, liquid crystalline mixtures which contain suc... | 12/26/1995 |
