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| Number | Title | Issue Date |
| 6930214 | Process for producing 2,5-bis(trifluoromethyl)nitrobenzene A process to produce 2,5-bis(trifluoromethyl)nitrobenzene in a high yield from an industrially easily available material by using a substance with which the reaction operation is simple and handling is easy, with a small number of steps under moderate reaction condi... | 08/16/2005 |
| 6806388 | Polyfluorinated aromatic or heterocyclic derivatives with sulphurpentalfluoride group(s) The invention provides polyfluorinated aromatic or heterocyclic compounds comprising at least three ring substituents, at least one of which comprises a sulfurpentafluoride group and at least one of which comprises a labile group; methods for their preparation are a... | 10/19/2004 |
| 6794549 | Continuous adiabatic process for nitrating chlorobenzene The present invention relates to a continuous adiabatic process for preparing nitrochlorobenzene in the presence of phosphoric acid. The waste acid produced during the practice of the process is reconcentrated and recycled into the nitration reaction. ... | 09/21/2004 |
| 6774257 | Bis (aminostyryl) naphthalene compound, synthesis intermediate thereof, and process for production thereof A bis(aminostyryl)naphthalene compound represented by the general formula [I] or the like below. General formula [I] (where R2 and R3 each denotes an unsubstituted aryl group; R1 an... | 08/10/2004 |
| 6765108 | Bis (aminostyryl) naphthalene compound, synthesis intermediate thereof, and process for production thereof A bis(aminostyryl)naphthalene compound represented by the general formula [I] or the like below. General formula [I] (where R2 and R3 each denotes an unsubstituted aryl group; R1 and R | 07/20/2004 |
| 6586645 | Continuous adiabatic process for preparing nitrochlorobenzene The present invention relates to a continuous adiabatic process for preparing nitrochlorobenzene, in which the waste sulfuric acid produced during the practice of the process is reconcentrated and recycled into the nitration reaction.... | 07/01/2003 |
| 6376726 | Process for the production of nitroaromatic compounds from aromatic hydrocarbons using modified clay catalysts The present invention relates to a process for the production of nitro line aromatic compounds from aromatic hydrocarbons using modified clay catalysts. This invention particularly relates to a process for nitration of aromatic hydrocarbons using modified... | 04/23/2002 |
| 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 |
| 6242657 | Method for producing aromatic nitro compounds In the reaction of aromatic compounds with nitrating acids comprising HNO3 and, if appropriate, H2 SO4 and/or H2 O and/or H3 PO4 to form aromatic nitro compounds, according to the invention... | 06/05/2001 |
| 6242654 | Preparation process of fluorine substituted aromatic compound A preparation process of a fluorine substituted aromatic compound comprising reacting an alkali metal or alkali earth metal salt of an aromatic compound having a hydroxy group with an organic fluorinating agent is disclosed. As a representative fluorinati... | 06/05/2001 |
| 5977418 | Regioselective nitration of aromatic compounds by dinitrogen pentoxide and the reaction products thereof The invention is a process for regioselective nitration of substituted aromatic compounds and the corresponding reaction products. The reaction is conducted in the presence of a solid zeolite with small pores and with nitrogen pentoxide as the nitrating a... | 11/02/1999 |
| 5946638 | Regioselective nitration of aromatic compounds and the reaction products thereof A method is described for the regioselective nitration of substituted aromatic compounds. The reaction is effected by heating the aromatic compound to a temperature within the range of 70-90° C. in the presence of a solid zeolite catalyst and adding conc... | 08/31/1999 |
| 5900502 | Fluorination process According to the present invention there is provided a process for the selective introduction of one or more fluorine atoms into a disubstituted aromatic compound in an acid medium with fluorine gas characterized in that the acid medium has a dielectric c... | 05/04/1999 |
| 5270309 | Kynurenic acid derivatives useful in the treatment of neurodegenerative disorders 4-Oxo-1,4-dihydroquinoline compounds having a 2-acidic group or a group convertible thereto in vivo, and their pharmaceutically acceptable salts, are potent specific antagonists of N-methyl-D-aspartate (NMDA) receptors and are therefore useful in the trea... | 12/14/1993 |
| 5212301 | Substituted fluorobenzenes Introduction of a fluoro substituent into an aromatic ring adjacent an electron donating group is difficult producing mixed isomers and low yields of desired products. A process for the introduction of a fluoro substituent into a substantially adjacent po... | 05/18/1993 |
| 5118879 | Fluoroalkyl derivative and process for preparing the same Fluoroalkyl derivatives which are novel compounds represented by the following general formula (I) or (II) of: ##STR1## or R1 --CH.dbd.CR2 (CF2)n F (II) (wherein R1 stands for ##STR... | 06/02/1992 |
| 4990699 | Perfluoroalkylation process Despite the instabity of perfluoralkyl anions, it is possible to perfluoroalkylate aromatic compounds if appropriately substituted by suitable electronegative substituents (e.g., nitro, trifluoromethylsulfonyl, etc.). Thus a novel Meisenheimer complex is ... | 02/05/1991 |
| 4956123 | Method for manufacture of fluorine-containing aromatic derivatives Fluorine-containing aromatic derivatives are produced by the reaction of di(haloacyl)peroxide represented by the general formula: ##STR1## (wherein X stands for a fluorine, chlorine, or hydrogen atom and n for an integer of the value of 1 to 10) with... | 09/11/1990 |
| 4831193 | Synthesis of 3-amino-2-methylbenzotrifluoride This invention relates to a novel process for preparing 3-amino-2-methylbenzotrifluoride from benzotrifluoride. The process comprises nitrating benzotrifluoride to form 3-nitrobenzotrifluoride, reacting this compound with trimethyl sulphoxonium halide to ... | 05/16/1989 |
| 4745219 | Chemical intermediates and a process for their preparation This invention pertains to chemical intermediates for a new class of 2-haloacetanilide herbicides and a process for preparation of these intermediates. The process generally involves nitration of substituted benzotrifluoride compounds.... | 05/17/1988 |
| 4668830 | Process for the preparation of compounds containing a difluoromethylene or trifluoromethyl group A process for the preparation of compounds containing a difluoromethylene or trifluoromethyl group. A compound containing a carbonyl group, preferbly an acid, acid halide, amide, ketone or any compound containing a perhaloalkylcarbonyl moiety is placed, i... | 05/26/1987 |
| 4634771 | Method for converting carboxylic acid groups to trichloromethyl groups There is disclosed a method for the conversion of a carboxylic acid group on the ring of an aromatic or N-heteroaromatic compound to a trichloromethyl group which comprises contacting the aromatic or N-heteroaromatic compound with a phenylphosphonous dich... | 01/06/1987 |
| 4631151 | Method for production of fluorine-containing aromatic derivative A fluorine-containing aromatic derivative is produced by causing a di(haloacyl)peroxide to react upon benzene, a mono-substituted benzene, naphthalene, or a mono-substituted naphthalene thereby introducing an X(CF2)n -group into the ... | 12/23/1986 |
| 4600702 | Vapor phase nitration catalysts Catalysts compositions useful to catalyze the nitration of aromatic compounds in the vapor phase to produce nitroaromatic compounds are represented by the empirical formula: wherein M1 is at least one element selected from Group 4b of the Perio... | 07/15/1986 |
| 4593144 | Process for preparing substituted benzotrichloride compounds This invention pertains to a process for preparing substituted and unsubstituted benzotrichlorides. The process generally involves reacting the starting compound with a perchloroalkane with presence of base and a phase transfer catalyst.... | 06/03/1986 |
| 4575565 | Process for preparing substituted benzotrichlorides The invention herein pertains to a novel process for making substituted benzotrifluorides.... | 03/11/1986 |
| 4562280 | Chloromethylation of deactivated aromatic compounds The invention is a process for the chloromethylation of an aromatic compound, substituted with an alkyl group and a deactivating moiety, which comprises contacting an aromatic compound, substituted with an alkyl group and a deactivating group, with a chlo... | 12/31/1985 |
| 4558166 | Process for the preparation of benzal chlorides Process for the preparation of benzal chlorides from benzotrichlorides, according to which benzotrichlorides are reacted with thiols in the presence of metal salts at elevated temperatures.... | 12/10/1985 |
| 4533776 | Preparation of fluorinated nitroalkanes In the preparation of an -fluorinated nitroalkane of the formula ##STR1## in which R1, R2, R3 and R4 are identical or different and individually represent hydrogen, fluorine, chlorine, bromine, alkyl, ... | 08/06/1985 |
| 4503276 | Process for separating nitration isomers of substituted benzene compounds This invention pertains to a process for separating nitration isomers of 1,3-disubstituted and 1,2,4-trisubstituted benzene compounds. The separated isomers have a variety of uses including precursors for 2-haloacetanilide herbicides.... | 03/05/1985 |
| 4467125 | Nitro-methyl or ethyl substituted benzotrifluoride The invention herein pertains to nitro-methyl or ethyl substituted benzotrifluoride compounds useful as chemical intermediates and a process for their preparation. The chemical intermediates are useful for the preparation of substituted anilines which are... | 08/21/1984 |
| 4454360 | Preparation of para-nitrobenzotrichloride Para-nitrobenzotrichloride is prepared by chlorinating nitrotoluene using an activated carbon catalyst. The process can use various cocatalysts such as bromine, iodine, PCl3, S2 Cl2, bromide salts, chloranil, air bubbles a... | 06/12/1984 |
| 4419514 | Method for converting carboxylic acid groups to trichloromethyl groups Method for converting carboxylic acid groups to trichloromethyl groups which comprises contacting a compound containing a carboxylic acid group with a phenylphosphonic dichloride and phosphorus pentachloride and recovering the thus produced product.... | 12/06/1983 |
| 4400563 | Process for preparing perfluoro(lower)alkylbenzenes and their derivatives A process for preparing perfluoro(lower)alkylbenzenes and derivatives thereof which comprises contacting a lower alkylbenzene or the corresponding derivative with hydrogen fluoride in the presence of chlorine in the gaseous phase at an elevated temperatur... | 08/23/1983 |
| 4395577 | Preparation of 3-chloromethyl-4-alkyl-nitrobenzene by chloromethylation A method for the preparation of 3-chloromethyl derivatives of 4-alkylnitrobenzenes from the corresponding amidomethyl derivatives with phosphorus oxychloride or with phosphorous oxychloride and inert solvents. This process also relates to 3-chloromethyl-4... | 07/26/1983 |
| 4393257 | Process for preparing benzotrifluoride and its derivatives A process for preparing benzotrifluoride or derivatives thereof by contacting benzotrichloride or the corresponding derivatives with hydrogen fluoride in a gaseous phase in the absence of any catalyst, the contact being carried out in the presence of chlo... | 07/12/1983 |
| 4350824 | Process for the preparation of 1,1-dichloro-alkenes A process for the preparation of a 1,1-dichloroalkene of the formula ##STR1## in which R1 is hydrogen, or an optionally substituted alkyl, alkenyl, alkinyl, cycloalkyl, aralkyl, aralkenyl or aryl radical, and R2 is an optionally subs... | 09/21/1982 |
| 4331819 | Water removal in nitration of aromatic hydrocarbons The invention relates to a process for the preparation of nitrated aromatic compounds by the mixed acid process, in which water is removed from the reaction mass by passing an inert gas through it.... | 05/25/1982 |
| 4297519 | Process for the preparation of 2-nitrobenzaldehyde A process provided for the production of 2-nitrobenzaldehyde from 2-nitrotoluene, in which 2-nitrotoluene is converted, by bromination by a radical mechanism, to 2-nitrobenzyl bromide in the form of a bromination oil containing 20 to 50% or more of 2-nitr... | 10/27/1981 |
| 4242286 | Process for preparing benzotrifluoride and its derivatives A process for preparing bentotrifluoride or its derivatives by contacting benzotrichloride or its derivatives corresponding thereto with hydrogen fluoride in a gaseous phase, characterized in that the contact is carried out in the presence of aluminum flu... | 12/30/1980 |
