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| Number | Title | Issue Date |
| 8058477 | Process for the synthesis of arylamines from the reaction of an aromatic compound with ammonia or a metal amide A catalytic process for the synthesis of aromatic primary amines, reagent compositions for effecting the process, and transition metal complexes useful in the process, are provided. ... | 11/15/2011 |
| 7777079 | Preparation method of 2, 6-dichlor-4-trifluoromethyl aniline This invention is involved with a preparation method of 2,6-dichloro-4-trifluoromethyl-aniline. With this process, p-Chlorobenzotrifluoride is used as the starting material and subjected to halogenation reaction and ammoniation reaction and through separation of rea... | 08/17/2010 |
| 7408085 | Rapid cost effective method for the synthesis of TPD-type arylamines A process for forming a tetra(aryl)-biphenyldiamine compound, including reacting a dibromobiphenyl compound and a diarylamine compound in the presence of a palladium ligated catalyst and a base. ... | 08/05/2008 |
| 7402700 | Rapid, cost effective method for synthesis of diarylamine compounds A process for forming a diarylamine compound, including reacting an aniline and an arylbromide in the presence of a palladium ligated catalyst and a base. ... | 07/22/2008 |
| 7345203 | Cost effective method for synthesis of triarylamine compounds from an aniline and an arylchloride A process for forming a triarylamine compound, including reacting an aniline and an arylchloride in the presence of a ligated palladium catalyst and a base. ... | 03/18/2008 |
| 7321066 | Method for producing aromatic diamine derivative The invention provides a method for efficiently producing an aromatic diamine derivative represented by formula (3) at high yield, the method including reacting an aromatic amide represented by formula (1) with an aromatic halide represented by formula (2): | 01/22/2008 |
| 7217840 | Method for preparing 1,3,5-triaminobenzene and hydrolyzing it into high-purity phloroglucinal The invention concerns a method for method for preparing 1,3,5-triaminobenzene, characterized in that it comprises a step which consists in amination of a compound of formula (I), wherein: A represents a halogen atom or a NH2 group; X1 and X | 05/15/2007 |
| 6759554 | Copper-catalyzed formation of carbon-heteroatom and carbon-carbon bonds The present invention relates to copper-catalyzed carbon-heteroatom and carbon-carbon bond-forming methods. In certain embodiments, the present invention relates to copper-catalyzed methods of forming a carbon-nitrogen bond between the nitrogen atom of an amide or a... | 07/06/2004 |
| 6538158 | Process for preparing 1,4-diaminonaphthalene and/or 1,5-diaminoNaphthalene 1,4-diaminonaphthalene and/or 1,5-diaminonaphthalene are produced by (a) reacting naphthalene with a halogen, (b) optionally, separating 1,4-dihalogen naphthalene or 1,5-dihalogen naphthalene from the mixture from step (a), and (c) reacting the mixture fr... | 03/25/2003 |
| 6476265 | Method for producing aryl oligoamines In a process for preparing aryl oligoamines, an amine is reacted with an activated aromatic and a base in a temperature range from 0 to 150° C. in the presence of a palladium component and a phosphine ligand. The aryl oligoamines are obtained simply and in go... | 11/05/2002 |
| 6465693 | Metal-catalyzed arylations of hydrazines, hydrazones, and related substrates A method is provided for the transition metal-catalyzed arylation, or vinylation, of hydrazines, hydrazones, and the like. Additionally, the invention provides a conceptually novel strategy, the cornerstone of which is the transition metal-catalyzed aryla... | 10/15/2002 |
| 6365776 | Process for producing aromatic amines The present invention provides an activator in arylamination using a palladium compound as a catalyst, which is superior to conventional phosphines in stability and performance. With the phosphine sulfide as an activator, an arylamination reaction achieve... | 04/02/2002 |
| 6331649 | Process for producing trifluoromethylbenzylamines The present invention relates to a process for producing a trifluoromethylbenzylamine represented by the general formula (1). This process includes the step of reducing an oxime represented by the general formula (2), ##STR1## where R1 rep... | 12/18/2001 |
| 6235938 | Transition metal-catalyzed process for preparing N-aryl amine compounds The present invention is directed to a process for the preparation of N-aryl amine compounds. The process of the present invention involves reacting a compound having an amino group with an arylating compound in the presence of a base and a transition met... | 05/22/2001 |
| 6235936 | Metal-catalyzed arylations of hydrazines, hydrazones, and related substrates A method is provided for the transition metal-catalyzed arylation, or vinylation, of hydrazines, hydrazones, and the like. Additionally, the invention provides a conceptually novel strategy, the cornerstone of which is the transition metal-catalyzed aryla... | 05/22/2001 |
| 6137010 | Method for preparing 4-nitrodiphenylamine and 4-nitrosodiphenylamine from carbanilide This invention relates to a process for preparing 4-nitrodiphenylamine and 4-nitrosodiphenylamine to be used for 4-aminodiphenylamine as an intermediate of antiozonant, wherein carbanilide is reacted with nitrobenzene in the presence of an appropriate bas... | 10/24/2000 |
| 6137011 | Process for the preparation of bistrifluoromethylbenzylamines Bistrifluoromethylbenzylamines are obtained in a simple manner in high purities and with good yields by catalytic hydrogenation of the corresponding bistrifluoromethylbenzonitriles if the process is carried out in the presence of Raney cobalt, at least on... | 10/24/2000 |
| 6127577 | Method of making 3,5-difluoroaniline from 1,3,5-trichlorobenzene A method for manufacturing 3,5-difluoroaniline by fluorinating 1,3,5-trichlorobenzene and then aminating the intermediate fluorinated benzene with aqueous or anhydrous ammonia to achieve the product in yields of greater than 80%.... | 10/03/2000 |
| 5977412 | Process for preparing 3,5-difluoroaniline The invention provides a novel process for producing a 3,5-difluoroaniline compound by reacting a 2-halo-4,6-difluoroaniline with a diazotizing agent in the presence of a reducing agent to form a diazonium salt. Build-up of potentially dangerous diazonium... | 11/02/1999 |
| 5965775 | Process for the preparation of 3,5-difluoroaniline The present invention relates to a process for the preparation of 3,5-difluoroaniline by reacting 3,5-difluorochlorobenzene with ammonia in the presence of a solvent in the presence of a copper compound and at least one metal selected from the group consi... | 10/12/1999 |
| 5929281 | Process for producing heterocyclic aromatic amine or arylamine A heterocyclic aromatic halide or an aryl halide is reacted with an amine compound in the presence of a base to give a heterocyclic aromatic amine or an arylamine, respectively. In this reaction, a catalyst comprising a palladium compound and a tertiary p... | 07/27/1999 |
| 5856576 | Aryne intermediates and a process for the preparation thereof There are provided aryne intermediates of formula I, useful in the manufacture of herbicidal compounds. ##STR1## Also provided is a method to prepare the formula I intermediates via the palladium catalyzed coupling of an o-halonitrobenzene or o-haloa... | 01/05/1999 |
| 5831128 | Synthesis of aromatic amines from chloroamatics The present invention relates to a process for the preparation of aromatic amines of the formula (I) Ar--NR1 R2 (I) in which Ar is ##STR1## and R3 to R9 independently of one... | 11/03/1998 |
| 5817850 | Ferrocene bis(phosphonite) ligands and complexes for transition-metal-catalyzed reactions The synthesis of new sterically hindered ferrocene bis(phosphonites) of formula I ##STR1## the synthesis of the corresponding transition-metal complexes and the use of these complexes in transition-metal-catalyzed reactions are described.... | 10/06/1998 |
| 5744638 | Process for the preparation of haloanthranilic acids The present invention relates to a process for the preparation of compounds of the general formula I ##STR1## in which X and Y, independently of each other, represent hydrogen, fluorine, chlorine or bromine, but cannot simultaneously represent h... | 04/28/1998 |
| 5684203 | Process for the preparation of nitro-substituted arylamines Nitroaromatics can be aminated using urea in the presence of bases and oxygen.... | 11/04/1997 |
| 5576460 | Preparation of arylamines A method of preparing an arylamine compound includes reacting a metal amide comprising a metal selected from the group consisting of tin, boron, zinc, magnesium, indium and silicon, with an aromatic compound comprising an activated substituent in the pres... | 11/19/1996 |
| 5510533 | Process for producing 3,5-difluoroaniline and derivative thereof A process for production of a 3,5-difluoroaniline compound with ease is disclosed, which comprise reacting an aminating agent with a 1,3,5-trifluorobenzene compound.... | 04/23/1996 |
| 5484953 | O-phenylenediamines containing fluoroalkyl(ene) groups Novel o-phenylenediamines of the formula containing fluoroalkyl(ene) groups ##STR1## in which the symbols used have the meaning given in the description, processes for their preparation and their use as intermediates.... | 01/16/1996 |
| 5466871 | Process for preparing nitroaniline derivatives A process for preparing a nitroaniline derivative comprising a step of reacting an aromatic nitro compound with an O-alkylhydroxylamine or a salt thereof in the presence of a base and optionally a metallic catalyst, which process is industrially advantage... | 11/14/1995 |
| 5274135 | Process for preparing aminobenzocyclobutenes A process for preparing a 3- or 4-aminobenzocyclobutene comprises aminating a 3- or 4-halo- or sulfonyloxybenzocyclobutene reactant with an aminating agent by heating at a temperature from about 80° C. to a temperature at which dimerization or oligomeriz... | 12/28/1993 |
| 5210303 | Process for producing benzylamines A process for producing a benzylamine which comprises reacting a benzyl halide with an aqueous ammonia solution in the presence of an aromatic aldehyde represented by the formula: ##STR1## wherein R represents a hydrogen atom, a halogen atom or a low... | 05/11/1993 |
| 5144076 | Preparation of 3,5-diamino benzotrifluoride 3,5-Diaminobenzotrifluoride can be produced, in a single step, by reacting 4-chloro-3,5-dinitro benzotrifluoride in a suitable solvent, with hydrogen gas, in the presence of a catalyst comprising palladium on a suitable carrier, and in the presence of a s... | 09/01/1992 |
| 5091580 | Process for the preparation of 2,6-difluoroaniline 2,6-Difluoroaniline is prepared from 1,2,3-trichlorobenzene by partial fluorine exchange to a mixture of 2,6-difluorochlorobenzene and 2,3-difluorochlorobenzene, amination of the chloro substituents, and separation of the desired product from the isomeric... | 02/25/1992 |
| 4521622 | Process for producing aromatic amine A process for producing an aromatic amine from an aromatic halide and ammonia, characterized by comprising the following steps (1), (2) and (3): step (1): reacting the aromatic halide with ammonia in the presence of water by using a catalyst comprising a coppe... | 06/04/1985 |
| 4508922 | Process for the preparation of optionally halogenated anilines Process for the manufacture of an optionally halogenated aniline of the formula: ##STR1## in which Y=halogen, R=H, alkyl (C1 -C4) or alkoxy (C1 -C4) and n=0 to 5. Halogenobenzenes of the formula: ##STR... | 04/02/1985 |
| 4433168 | Process for the purification of crude 3,4,3',4'-tetraaminodiphenyl Crude 3,4,3',4'-tetraaminodiphenyl (TAD) prepared by ammonolysis of 3,3'-dichlorobenzidine in the presence of mainly Cu catalysts is purified by a process in which (a) after its isolation from the preparation process crude TAD is treated with an aqueous N... | 02/21/1984 |
| 4380670 | Process for producing 1,3,5-triaminobenzene An aminobenzene is produced by reacting a chlorobenzene with ammonia in the presence of a copper type catalyst, namely by reacting ammonia with 3,5-diaminochlorobenzene to produce 1,3,5-triaminobenzene at a temperature of 150° to 250° C. at a molar rati... | 04/19/1983 |
| 4340757 | Process for the preparation of 2,6-dialkylaniline from brominated dialkyl t-butylbenzene A process for the preparation of 2,6-dialkylaniline which comprises the reaction of 1,3-dialkyl-5-tertiary-butylbenzene with molecular bromine to form 2-bromo-1,3-dialkyl-5-tertiary-butylbenzene, which is subsequently reacted with 1,3-dialkylbenzene in th... | 07/20/1982 |
| 4197259 | Preparation of haloaniline Haloaniline is produced in high yield by reacting halobenzene with a mixture containing a metal amide and a controlled molar excess of liquid ammonia based on the moles of halobenzene.... | 04/08/1980 |
