Two Benzene Rings Bonded Directly To The Same Nitrogen Patents (Class 564/433)
-
Publication number: 20040082813Abstract: A method for producing aromatic amino compound (V): 1Type: ApplicationFiled: September 12, 2003Publication date: April 29, 2004Inventors: Toshihiro Iwakuma, Fumio Moriwaki
-
Patent number: 6723455Abstract: An electro-luminescent element comprising an organic compound layer is disclosed. The organic compound layer contains a compound represented by Formula I or Formula V: wherein R1 and R2 are each a substituent, and Ar is an aromatic hydrocarbon ring or an aromatic heterocyclic ring each of them may have a substituent, wherein R11 through R16 and X1 through X9 are each a hydrogen atom or a substituent, they may be the same or different; and the sum of the steric parameters EsR1 through EsR16 of R11 through R16 satisfies the following expression: EsR11+EsR12+EsR13+EsR14+EsR15+EsR16≦−2.0.Type: GrantFiled: September 24, 2001Date of Patent: April 20, 2004Assignee: Konica CorporationInventors: Noriko Ueda, Mitsunori Matsuura, Hiroshi Kita
-
Patent number: 6713135Abstract: The present invention provides novel polyimides, poly(amic acids) and poly(amide esters) thereof, and optical alignment layers derived therefrom, for inducing alignment of liquid crystals and liquid crystal displays. The novel compositions comprise side-chain polymers of the general formula I —L1—D—L2—Cf wherein D comprises 1 to 4 carbon-carbon double bonds, Cf is a monovalent C4 to C20 fluorocarbon radical and L1 and L2 are linking groups. The invention further describes liquid crystal displays and other liquid crystal devices.Type: GrantFiled: December 19, 2000Date of Patent: March 30, 2004Assignee: Elsicon, Inc.Inventors: Wayne M. Gibbons, Patricia A. Rose, Paul J. Shannon, Hanxing Zheng
-
Publication number: 20040039208Abstract: The present invention relates to a process for the preparation of N-arylanthranilic acids, and a process for the preparation of N-aryl anthranilic esters, amides, and hydroxamic esters.Type: ApplicationFiled: February 7, 2003Publication date: February 26, 2004Inventors: Michael Huai Gu Chen, Edward Mark Davis, Javier Magano, Thomas Norman Nanninga, Derick Dale Winkle
-
Patent number: 6653510Abstract: The invention relates to a process for isolating, from a polymer comprising repeating units which are individually of Formula X in which Y is P or N, Ar1 & Ar2 are bivalent aromatic groups, Ar3 is a monovalent aromatic group, and the units of Formula X may be the same or different, a molecular weight fraction which is especially suitable for use as a charge transport material.Type: GrantFiled: November 28, 2001Date of Patent: November 25, 2003Assignee: Avecia LimitedInventors: Beverley Anne Brown, Janos Veres, Joanne Victoria Allen, John Dylan Morgan, Stephen William Leeming
-
Publication number: 20030143430Abstract: The invention is to provide an organic EL device having a long life time that can reduce the driving voltage of the organic EL device, and to provide a material having a small ionization potential and exhibiting a large hole mobility by using as a layer or a zone. The organic electroluminescence device comprises a pair of electrodes and an organic light emitting layer sandwiched in the electrodes, characterized in that a hole transporting zone provided between the electrodes comprises the phenylenediamine derivative represented by the specific structural formulae, and the phenylenediamine derivative has a hole mobility of 10−4 cm2/V·s or more upon using as a layer or a zone, with the organic light emitting layer containing a charge injection auxiliary.Type: ApplicationFiled: December 31, 2002Publication date: July 31, 2003Applicant: Idemitsu Kosan Co., Ltd.Inventors: Hisayuki Kawamura, Chishio Hosokawa
-
Patent number: 6583320Abstract: The invention is directed-to a method of producing one or more 4-aminodiphenylamine intermediates comprising the steps of bringing an aniline or aniline derivative and nitrobenzene into reactive contact and reacting the aniline and nitrobenzene in a confined zone at a suitable time and temperature, in the presence of a mixture comprising an inorganic salt or metal organic salt having a cation that would be a suitable cation of a strong inorganic base, an oxidant and an organic base, the mixture not including a reaction product of betaine and a strong inorganic base.Type: GrantFiled: May 10, 2002Date of Patent: June 24, 2003Assignee: Flexsys America L.P.Inventors: Ralph Dale Triplett, II, Roger Keranen Rains
-
Publication number: 20030073863Abstract: A bis(aminostyryl)benzene compound of the following general formula [I] is provided 1Type: ApplicationFiled: August 26, 2002Publication date: April 17, 2003Inventors: Mari Ichimura, Shinichiro Tamura, Tadashi Ishibashi, Ichinori Takada
-
Publication number: 20030073867Abstract: A bis(aminostyryl)naphthalene compound represented by the general formula [I] or the like below.Type: ApplicationFiled: August 29, 2002Publication date: April 17, 2003Inventors: Mari Ichimura, Tadashi Ishibashi, Shinichiro Tamura
-
Publication number: 20030069448Abstract: A bis(aminostyryl)naphthalene compound represented by the general formula [I] or the like below.Type: ApplicationFiled: August 29, 2002Publication date: April 10, 2003Inventors: Mari Ichimura, Tadashi Ishibashi, Shinichiro Tamura
-
Publication number: 20030069437Abstract: A bis(aminostyryl)benzene compound of the following general formula [I] is provided 1Type: ApplicationFiled: August 26, 2002Publication date: April 10, 2003Inventors: Mari Ichimura, Shinichiro Tamura, Tadashi Ishibashi, Ichinori Takada
-
Patent number: 6541129Abstract: The invention is to provide an organic EL device having a long life time that can reduce the driving voltage of the organic EL device, and to provide a material having a small ionization potential and exhibiting a large hole mobility by using as a layer or a zone. The organic electroluminescence device comprises a pair of electrodes and an organic light emitting layer sandwiched in the electrodes, characterized in that a hole transporting zone provided between the electrodes comprises the phenylenediamine derivative represented by the specific structural formulae, and the phenylenediamine derivative has a hole mobility of 10−4 cm2/V·s or more upon using as a layer or a zone, with the organic light emitting layer containing a charge injection auxiliary.Type: GrantFiled: May 9, 2000Date of Patent: April 1, 2003Assignee: Idemitsu Kosan Co., Ltd.Inventors: Hisayuki Kawamura, Chishio Hosokawa
-
Patent number: 6540793Abstract: Couplers for hair coloring compositions for oxidative dyeing of hair are compounds of the formula (1): wherein R is selected from the group consisting of C1 to C2 alkyl and hydroxyethyl; R1 is selected from the group consisting of a hydrogen, hydroxy, nitro, halogen, C1 to C5 alkyl or haloalkyl, C1 to C5 alkoxy or cycloalkoxy, C1 to C5 hydroxyalkyl and C1 to C5 hydroxyalkoxy; Ar is an aromatic group, preferably an aromatic group selected from the group consisting of a furyl, thienyl, pyridyl, phenyl, 2,3-dihydro-benzo[1,4]dioxin-5 or -6-yl or benzo[1,3]dioxol-4 or -5-yl group; and y=1 to 3.Type: GrantFiled: December 7, 2000Date of Patent: April 1, 2003Assignee: Clairol IncorporatedInventors: Mu-lll Lim, Linas R. Stasaitis, Yuh-Guo Pan
-
Publication number: 20030044640Abstract: Novel styryl compounds represented by the following general formulae (1) and (2): 1Type: ApplicationFiled: August 31, 2001Publication date: March 6, 2003Inventors: Masakazu Funahashi, Hiromasa Arai, Chishio Hosokawa
-
Patent number: 6521793Abstract: New ligands having a backbone comprised of NCCX can be combined with a metal or metal precursor compound or formed into a metal-ligand complex to catalyze a number of different chemical transformations, including polymerization.Type: GrantFiled: October 8, 1998Date of Patent: February 18, 2003Assignee: Symyx Technologies, Inc.Inventors: Anil S. Guram, Anne Marie LaPointe, Howard W. Turner, Tetsuo Uno
-
Patent number: 6492557Abstract: A bis(aminostyryl)naphthalene compound represented by the general formula [I] or the like below. (where R2 and R3 each denotes an unsubstituted aryl group; R1 and R4 each denotes an aryl group having a specific substituent such as methoxy group; and R5 and R6 each denotes a cyano group or the like.) A process for producing a bis(aminostyryl)naphthalene compound represented by the general formula [I] by condensation of, for example, 4-(N,N-diarylamino)benzaldehyde with diphosphonic ester or diphosphonium The bis(aminostyryl)naphthalene compound emits intense yellow or red light. The process permits efficient production of the bis(aminostyryl)naphthalene compound.Type: GrantFiled: October 5, 2000Date of Patent: December 10, 2002Assignee: Sony CorporationInventors: Mari Ichimura, Tadashi Ishibashi, Shinichiro Tamura
-
Patent number: 6426324Abstract: An antioxidant composition suitable for ester fluid lubricants is the reaction product of diphenylamine and N-aryl naphthylamine in the presence of an organic peroxide. The mole ratio of diphenylamine:N-aryl naphthylamine is about 1:1 to about 10:1. This results in more oligomeric reaction products and significantly less unreacted monomeric residual reactants. The resultant product composition comprises DPA homo-oligomers and DPA-NPA cross oligomers. The diphenylamine and N-aryl naphthylamine are desirably substituted with alkyl groups having from 1 to 20 carbon atoms or styryl groups. The reaction temperature is preferably about 130° to about 150° C. Controlled reaction conditions allow the use of solvents with extractable hydrogen atoms without producing significant amounts of dehydrocondensation between the solvent and the diamines.Type: GrantFiled: October 25, 2000Date of Patent: July 30, 2002Assignees: Noveon IP Holdings Corp., BP Exploration & Oil, Inc.Inventors: John Ta-Yuan Lai, Deborah S. Filla
-
Publication number: 20020094452Abstract: An electro-luminescent element comprising an organic compound layer is disclosed.Type: ApplicationFiled: September 24, 2001Publication date: July 18, 2002Inventors: Noriko Ueda, Mitsunori Matsuura, Hiroshi Kita
-
Publication number: 20020072632Abstract: New ligands having a backbone comprised of NCCX can be combined with a metal or metal precursor compound or formed into a metal-ligand complex to catalyze a number of different chemical transformations, including polymerization.Type: ApplicationFiled: February 1, 2002Publication date: June 13, 2002Applicant: Symyx TechnologiesInventors: Anil S. Guram, Anne Marie LaPointe, Howard W. Turner, Tetsuo Uno
-
Patent number: 6395933Abstract: The invention is directed to a method of producing one or more 4-aminodiphenylamine intermediates comprising the steps of bringing an aniline or aniline derivative and nitrobenzene into reactive contact; and reacting the aniline and nitrobenzene in a confined zone at a suitable time and temperature, in the presence of a mixture comprising a strong base and a suitable phase transfer catalyst. Certain phase transfer catalysts may also function as the strong base.Type: GrantFiled: July 23, 2001Date of Patent: May 28, 2002Assignee: Flexsys America, L.P.Inventors: Ralph Dale Triplett, II, Roger Keranen Rains
-
Publication number: 20020057050Abstract: The present invention relates to a novel class of thermostable hole-injection and hole-transport compounds having tunable glass transition temperatures and ionization potentials for use in organic light emitting diode (“OLED”) devices. In particular, the compounds of the present invention comprise a trityl aniline core structure with various substituents attached to the nitrogen group, the structures of which allow for the adjustment of the glass transition temperatures and ionization potentials of the compounds. The present invention also relates to microdisplay devices comprising the compounds of the present invention in the hole-injection/hole-transport layers.Type: ApplicationFiled: June 28, 2001Publication date: May 16, 2002Inventor: Xiaobo Shi
-
Patent number: 6365776Abstract: 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 achieves improved selectivity to produce a desired aromatic amine in an obviously increased yield as compared with a reaction using the corresponding phosphine compound. Moreover, the phosphine sulfide of the invention is impervious to oxidation and exists stably in air and therefore sufficiently withstands use on an industrial scale.Type: GrantFiled: September 6, 2001Date of Patent: April 2, 2002Assignee: Takasago International CorporationInventors: Mitsuhiko Fujiwara, Ken Suzuki, Tohru Kobayashi, Yoji Hori, Toshimitsu Hagiwara
-
Patent number: 6355839Abstract: A process for preparation of alkylated diphenylamine antioxidant which comprises alkylating diphenylamine with a polyisobutylene in the presence of a clay catalyst, wherein the polyisobutylene has an average molecular weight in the range of 120 to 600 and wherein the polyisobutylene contains at least 25% methylvinylidene isomer.Type: GrantFiled: August 31, 2001Date of Patent: March 12, 2002Assignee: Chevron U.S.A., Inc.Inventor: Anatoli Onopchenko
-
Patent number: 6331553Abstract: Compounds represented by the general formula (1): (where R1 and R2 are typically a hydrogen atom; R3 and R4 are typically a hydrogen atom or a lower alkyl group; R5 is typically a hydrogen atom; X1, X2, X3 and X4 are typically a hydrogen atom or a lower alkoxy group; A is typically an optionally substituted pyridine ring; m and n are each 0 or 1) have an NOS inhibiting activity and are useful as therapeutics of cerebrovascular diseases and other pharmaceuticals.Type: GrantFiled: June 24, 1999Date of Patent: December 18, 2001Assignee: Chugai Seiyaku Kabushiki KaishaInventors: Toru Esaki, Toshihiko Makino, Yoshikazu Nishimura, Toshiaki Nagafuji
-
Publication number: 20010046612Abstract: A hole transporting compound for organic electroluminescent devices with good thermal stability, which includes 6,6′-bis(9H,9-carbazolyl)-N,N′-disubstituted-3,3′-bicarbazyl as a basic molecular structure, is represented by the following formula I: 1Type: ApplicationFiled: February 8, 2001Publication date: November 29, 2001Applicant: Samsung SDI Co., Ltd.Inventors: Ji-Hoon Lee, In-Seo Kee, Sung-Woo Cho, Byung-Hoon Chae
-
Publication number: 20010039361Abstract: The present invention provides novel aromatic diamines useful in preparing polyimides for optical alignment layers in liquid crystal displays.Type: ApplicationFiled: December 20, 2000Publication date: November 8, 2001Inventors: Wayne M. Gibbons, Patricia A. Rose, Paul J. Shannon, Hanxing Zheng
-
Publication number: 20010033944Abstract: A light-emitting material which serves to emit light having a high brightness and is almost free of deterioration in light emission, and an organic EL device for which the light-emitting material is adapted, the material having the formula (1) disclosed in claim 1, 2 or 3.Type: ApplicationFiled: March 17, 1998Publication date: October 25, 2001Inventors: TOSHIKAZU ONIKUBO, MICHIKO TAMANO, SATOSHI OKUTSU, TOSHIO ENOKIDA
-
Patent number: 6280859Abstract: A light-emitting material which serves to emit light having a high brightness and is almost free of deterioration in light emission, and an organic EL device for which the light-emitting material is adapted, the material having the formula [1],Type: GrantFiled: March 17, 1998Date of Patent: August 28, 2001Assignee: Toyo Ink Manufacturing Co., Ltd.Inventors: Toshikazu Onikubo, Michiko Tamano, Satoshi Okutsu, Toshio Enokida
-
Patent number: 6235736Abstract: A 3-anilino-2-cycloalkenone derivative of the formula (I): wherein, R1 represents a C1 to C8 alkyl group, which may have a substituent, except for a methyl group, a C3 to C7 cycloalkyl group, a 3-tetrahydrofuryl group, an 2-indanyl group, etc., R2 represents a C1 to C4 alkyl group, R3 represents a hydrogen atom, a C3 to C7 alkyl group, which may have a substituent, a C3 to C7 cycloalkyl group, etc., R4 represents a hydrogen atom, a C1 to C5 alkyl group, which may have a substituent, a halogen atom, etc., R5, R6, R7, and R8 independently represent a hydrogen atom, a C1 to C5 alkyl group, which may have a substituent, etc., X represents —(CR11R12)n—, wherein n is 0 to 2, R11 and R12 independently represent a hydrogen atom, a C1 to C5 alkyl group, which may have a substituent, etc.Type: GrantFiled: March 20, 2000Date of Patent: May 22, 2001Assignee: Nikken Chemicals Co., Ltd.Inventors: Shinji Ina, Kenjirou Yamana, Kyoji Noda, Akane Takahama, Toshihiko Akiyama
-
Patent number: 6221414Abstract: The invention relates to a process for treating fruit and vegetables after harvesting, using, as plant-protection treatment composition, the mixture with water of the reaction medium resulting from the implementation of steps of purification of a plant-protection product contaminated with impurities of aromatic primary amine type. The process contains the steps of: a) the placing in contact with stirring, at a temperature between 15 and 25° C., of an aqueous solution of an alkali metal nitrite with an organic solution prepared by dissolving the said plant-protection product to be purified in a solvent chosen from a nonionic surfactant, a C2-C12 glycol and mixtures thereof; b) the addition of a strong inorganic acid to the resulting reaction medium, while stirring at the said temperature; c) followed by heating of the reaction medium to a temperature of between 30 and 70° C.Type: GrantFiled: August 27, 1999Date of Patent: April 24, 2001Assignee: Xeda InternationalInventor: Alberto Sardo
-
Patent number: 6218576Abstract: Described is a process for producing a diarylamine, which comprises subjecting an arylamine to condensation reaction in the co-presence of anhydrous aluminum chloride and anhydrous calcium chloride. The process permits the production of a diarylamine in a high yield at a normal pressure while terminating the reaction in a short time; and also permits the production, at a low cost, of a diarylamine having a high purity to be usable sufficiently as an intermediate for the production of a raw material for an electronic material.Type: GrantFiled: June 5, 2000Date of Patent: April 17, 2001Assignee: Sankio Chemical Co., Ltd.Inventors: Taichi Shintou, Satoru Fujii, Shinji Kubo
-
Patent number: 6204412Abstract: A method of manufacturing an alkylated diphenylamine composition to generate an alkylated diphenylamine composition with relatively low amounts of unsubstituted diphenylamine, based on the total weight of substituted and unsubstituted diphenylamine in the alkylated diphenylamine composition. The method includes reaction of unsubstituted diphenylamine with at least two olefins. In at least some instances, the alkylated diphenylamine composition may be used, for example, as an antioxidant in a lubricating fluid or polymer composition.Type: GrantFiled: April 16, 1999Date of Patent: March 20, 2001Assignee: The B. F. Goodrich CompanyInventor: John T. Lai
-
Patent number: 6172264Abstract: A triphenylamine derivative, represented by the following general formula (1): wherein R1, R2, R3, R4, R5 and R6 each represents a hydrogen atom, a lower alkyl group, an alkoxy group, a halogen atom or an aryl group which may have a substituent group; and m and n each represents 0 or 1.Type: GrantFiled: February 19, 1999Date of Patent: January 9, 2001Assignee: Takasago International CorporationInventors: Tohru Kobayashi, Yoshimasa Matsushima, Hiroshi Sugiyama, Toshimitsu Hagiwara
-
Patent number: 6162824Abstract: Described herein are compounds which have the general formula: ##STR1## or a prodrug or pharmaceutically acceptable salt, solvate or hydrate thereof wherein:R.sup.1 is selected from the group consisting of H, alkyl and the counter ion for a basic addition salt;X is selected from the group consisting of CR.sup.9 R.sup.10, S, O, SO, SO.sub.2, NH and N-alkyl;R.sup.2, R.sup.3, R.sup.4, R.sup.9 and R.sup.10 are independently selected from the group consisting of H and alkyl;R.sup.5 and R.sup.6 are independently selected from the group consisting of H, alkyl and phenyl, or, alternatively, R.sup.5 and R.sup.6 together may form a methylene group or a 3- to 6-membered a spirocyclic group;wherein, when X is CR.sup.9 R.sup.10, one or both pairs of R.sup.5 and R.sup.9 or R.sup.6 and R.sup.10 may join to form a double or triple bondR.sup.7 is selected from the group consisting of Formula II-V: ##STR2## which are all optionally substituted, at nodes other than R.sup.Type: GrantFiled: July 30, 1999Date of Patent: December 19, 2000Assignee: Allelix Neuroscience Inc.Inventors: Vassil I. Ognyanov, Allen Hopper, Stanley Charles Bell, Eric A. Meade, Michael De Vivo
-
Patent number: 6124462Abstract: Phosphine oxide compounds were used with transition metals, preferably palladium, to produce biaryls and arylamines via cross-coupling reactions with aryl halides and arylboronic acids or amines.Type: GrantFiled: November 30, 1999Date of Patent: September 26, 2000Assignee: E. I. du Pont de Nemours and CompanyInventor: George Y. Li
-
Patent number: 6074734Abstract: The present invention provides a triamine compound represented by general formula (I): ##STR1## an organic luminescence device which comprises an organic layer and a pair of electrodes disposed on both sides of the organic layer wherein the organic layer at least contains a layer of a light emitting zone and a layer of a hole transporting zone which comprises a hole injecting layer containing the triamine compound and a hole transporting layer, and an organic thin film comprising two layers which are a layer containing a compound represented by general formula (I) and having a thickness of 5 nm to 5 .mu.Type: GrantFiled: July 21, 1997Date of Patent: June 13, 2000Assignee: Idemitsu Kosan Co., Ltd.Inventors: Hisayuki Kawamura, Hiroaki Nakamura, Chishio Hosokawa
-
Patent number: 6069279Abstract: A method for the preparation of aromatic amines such as N-phenyl-p-phenylenediamine wherein an aromatic amine such as aniline is oxidized with oxygen or hydrogen peroxide in the presence of a metal pentacyano ferrate(II) complex, includes subsequent catalytic reduction of the complex by hydrogenation in the presence of a metal catalyst having at least two Group VIII metals, preferably platinum in combination with ruthenium either together on a single carbon support or each metal separately on carbon supports.Type: GrantFiled: June 14, 1999Date of Patent: May 30, 2000Inventors: Mark W. Simon, Mohammad A. Khan
-
Patent number: 5994584Abstract: 4-Aminodiphenylamines are prepared by hydrogenating nitrosobenzene or mixtures of nitrosobenzene and nitrobenzene with hydrogen in the presence of fluorides and heterogeneous catalysts in inert aprotic solvents at temperatures from 0 to 200.degree. C. and pressures from 0.1 to 150 bar.Type: GrantFiled: March 8, 1999Date of Patent: November 30, 1999Assignee: Bayer AktiengesellschaftInventors: Pieter Ooms, Henrey Giera
-
Patent number: 5977411Abstract: This invention provides a method for preparing 4-ADPA by charging nitrobenzene into a reaction zone under hydrogen pressure in the presence of a strong organic base and a catalyst for hydrogenation. The method provides the convenience and economy of a one-step process, while producing improved yields and selectivities. The invention further provides for various embodiments of the foregoing which are suitable for the production of 4-ADPA, and the hydrogenation or reductive alkylation to produce PPD. Important to the invention are the molar ratios of aniline to nitrobenzene and nitrobenzene to the strong organic base and the choice and use of hydrogenation catalyst.Type: GrantFiled: June 10, 1997Date of Patent: November 2, 1999Assignee: Flexsys America L.P.Inventor: Antonio L. DeVera
-
Patent number: 5932768Abstract: 4-aminodiphenylamines are prepared by hydrogenating nitrosobenzene or mixtures of nitrosobenzene and nitrobenzene with hydrogen in the presence of bases containing hydroxide, oxide and/or alkoxide groups and heterogeneous catalysts in inert aprotic solvents at temperatures of from 0 to 200.degree. C. and at pressures of from 0.1 to 150 bar.Type: GrantFiled: July 30, 1998Date of Patent: August 3, 1999Assignee: Bayer AGInventors: Pieter Ooms, Ulrich Notheis, Christian Laue
-
Patent number: 5925791Abstract: 4-aminodiphenylamines are produced by hydrogenating nitrobenzene with hydrogen in the presence of bases containing hydroxide and/or oxide groups and heterogeneous catalysts and in the presence of inert aprotic solvents at temperatures of 0 to 200.degree. C. and pressures of 0.1 to 150 bars.Type: GrantFiled: February 27, 1998Date of Patent: July 20, 1999Assignee: Bayer AGInventors: Hans-Josef Buysch, Christian Laue, Heinrich Konigshofen, Ulrich Notheis, Pieter Ooms, Ursula Pentling
-
Patent number: 5922887Abstract: A compound, or solvate or salt thereof, of formula (I) ##STR1## in which, R.sub.1 and R.sub.2, are, independently hydrogen, linear or branched C.sub.1-6 alkyl, C.sub.3-7 cycloalkyl, C.sub.3-7 cycloalkenyl, or C.sub.3-6 alkenyl, or together form a C.sub.3-7 alkyl;R.sub.3 and R.sub.4 are, independently, hydrogen, linear or branched C.sub.1-6 alkyl, or R.sub.4 is oxygen forming with the carbon atom to which is attached a C.dbd.O group;R.sub.5 is hydrogen, hydroxy, or C.sub.1-3 alkoxy;R.sub.6 is halogen, NH.sub.2 or a para or meta --COR-8 group, in which R.sub.8 is C.sub.1-8 -alkyl, C.sub.1-8 -alkoxy or NR.sub.9 R.sub.10, wherein R.sub.9 and R.sub.10, are, independently, hydrogen, straight or branched C.sub.1-6 alkyl, C.sub.3-7 cycloalkyl or phenyl; or R.sub.6 is a para or meta group ##STR2## in which R.sub.11 and R .sub.12 are, independently, hydrogen or straight or branched C .sub.1-6 and,R.sub.7 is hydrogen, or straight or branched C.sub.1-8 alkyl; is provided.Type: GrantFiled: November 18, 1997Date of Patent: July 13, 1999Assignee: SmithKline Beecham SpAInventors: Giulio Dondio, Silvano Ronzoni
-
Patent number: 5910610Abstract: A triphenylamine derivative, represented by the following general formula (1): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 each represents a hydrogen atom, a lower alkyl group, an alkoxy group, a halogen atom or an aryl group which may have a substituent group; and m and n each represents 0 or 1.Type: GrantFiled: September 2, 1997Date of Patent: June 8, 1999Assignee: Takasago International CorporationInventors: Tohru Kobayashi, Yoshimasa Matsushima, Hiroshi Sugiyama, Toshimitsu Hagiwara
-
Patent number: 5902901Abstract: A process for the preparation of N,N-bis(3,4-dimethylphenyl)-4-biphenylamine which comprises the reaction of N,N-bis(3,4-dimethylphenyl)amine and an iodobiphenyl in the presence of a ligand copper catalyst, and wherein the ligand is selected from the group consisting of monodentate tertiary amines and bidentate tertiary amines, and which reaction is accomplished at a temperature of, for example, from about 120.degree. C. to about 150.degree. C.Type: GrantFiled: May 7, 1998Date of Patent: May 11, 1999Assignee: Xerox CorporationInventors: H. Bruce Goodbrand, George Liebermann, Roger E. Gaynor
-
Patent number: 5763667Abstract: Ether-linked amine-terminated polyethers are produced by reacting (1) a polyether polyol in which substantially all of the hydroxyl groups have been replaced with good leaving groups with (2) an aminoalcohol and/or aminothiol and (3) a deprotonating agent. The aminopolyethers obtained by this process are characterized by low viscosities and excellent reactivities over a wide range of molecular weights and functionalities.Type: GrantFiled: January 31, 1996Date of Patent: June 9, 1998Assignee: Bayer CorporationInventors: Rick L. Adkins, William E. Slack
-
Patent number: 5760247Abstract: Diphenylamine can be dehydrocyclized on noble metal catalysts in the liquid phase at temperatures of 200.degree. to 340.degree. C. The reaction proceeds with a surprisingly high selectivity.Type: GrantFiled: May 20, 1997Date of Patent: June 2, 1998Assignee: Bayer AktiengesellschaftInventors: Albert Schnatterer, Helmut Fiege, Joerg-Dietrich Jentsch, Eberhard Zirngiebl
-
Patent number: 5750787Abstract: A process for monoalkylating diphenylamine using a clay catalyst is disclosed which results in a reaction product having substantial amounts of desirable monoalkylated diphenylamine and minimal amounts of less desirable disubstituted diphenylamine and unsubstituted diphenylamine. The disclosed process uses clay catalysts which favor monoalkylation over dialkylation and specific conditions such as reaction temperature, mole ratios of alkylating olefin to diphenylamine, reaction times, and catalyst amounts. Preferred olefins are diisobutylene and linear alpha olefins having from 6 or 8 to 18 carbon atoms. When more than 1 wt. % residual unreacted diphenylamine is present it may be converted to alkylated diphenylamine by reacting with styrene, alpha-methylstyrene or isobutylene.Type: GrantFiled: May 30, 1996Date of Patent: May 12, 1998Assignee: B. F. Goodrich CompanyInventors: John T. Lai, Deborah S. Filla
-
Patent number: 5739403Abstract: 4-Aminodiphenylamines are produced by reacting optionally substituted aniline with optionally substituted nitrobenzene in the presence of water and/or alcohols and organic and/or inorganic bases and then catalytically hydrogenating the resultant nitro- and/or nitrosodiphenylamine in the presence of water, wherein the catalytic hydrogenation of the reaction mixture is performed in the presence of 25 to 80 wt. % of water, relative to the weight of the reaction mixture from the condensation reaction, the hydrogenation catalyst is removed from the hydrogenation mixture once absorption of hydrogen has ceased, 10 to 100 vol. % of aromatic solvent, relative to the total volume of the hydrogenation mixture, are optionally added to the hydrogenation mixture, the resultant organic phase is separated in order to isolate the 4-aminodiphenylamine and the aqueous phase is returned to the initial reaction mixture.Type: GrantFiled: January 6, 1997Date of Patent: April 14, 1998Assignee: Bayer AGInventors: Klaus Reinartz, Adolf Brill, Fred Schuhmacher
-
Patent number: 5723671Abstract: A process for the preparation of N,N-bis(3,4-dimethylphenyl)-4-biphenylamine which comprises the reaction of an aminobiphenyl and an iodoxylene in the presence of a ligand copper catalyst, and wherein the ligand is selected from the group consisting of monodentate tertiary amines and bidentate tertiary amines, and which reaction is accomplished at a temperature of from about 120.degree. C. to about 150.degree. C.Type: GrantFiled: January 30, 1997Date of Patent: March 3, 1998Assignee: Xerox CorporationInventors: H. Bruce Goodbrand, Nan-Xing Hu, Beng S. Ong
-
Patent number: 5723669Abstract: A process preparation of N,N-bis(3,4-dimethylphenyl)-4-biphenylamine which comprises the reaction of N,N-bis(3,4-dimethylphenyl)amine and an iodobiphenyl in the presence of a ligand copper catalyst, and wherein the ligand is selected from the group consisting of monodentate tertiary amines and bidentate tertiary amines, and which reaction is accomplished at a temperature of from about 120.degree. C. to about 150.degree. C.Type: GrantFiled: January 30, 1997Date of Patent: March 3, 1998Assignee: Xerox CorporationInventors: H. Bruce Goodbrand, Nan-Xing Hu, Beng S. Ong