Reduction Of Nitro Or Nitrogen Oxide Group Patents (Class 534/600)
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Patent number: 6008330Abstract: The present invention relates to a novel process for the preparation of aminodiarylazo compounds by reducing nitrodiarylazo compounds using 1,2-alkanediols or 1,2-aminoalkanols.Type: GrantFiled: February 10, 1999Date of Patent: December 28, 1999Assignee: Bayer AktiengesellschaftInventor: Klaus Kunde
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Patent number: 5644040Abstract: Azo dyes of the formula (1) ##STR1## in which R.sub.1 and R.sub.2 are hydrogen or C.sub.1 -C.sub.4 alkyl, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.2 -C.sub.4 alkanoylamino, ureido or halogen, X is chlorine or fluorine, B.sub.1 is phenyl, naphthyl or heterocyclic radical, and A.sub.1 is a radical of the formula (2) ##STR2## in which R.sup.7 is hydrogen, amino, N-mono- or N,N-di-C.sub.1 -C.sub.4 alkylamino or optionally substituted phenylamino and R.sub.8 is hydrogen or hydroxyl, or A.sub.1 is a radical of the formula (3) ##STR3## in which R.sub.9 is hydrogen, C.sub.1 -C.sub.8 alkyl or phenyl which is optionally substituted by C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.2 -C.sub.2 -C.sub.4 alkanoylamino, ureido, halogen or sulfo, R.sub.10 is hydrogen or C.sub.1 -C.sub.8 alkyl and R.sub.11 is hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.2 -C.sub.Type: GrantFiled: November 21, 1995Date of Patent: July 1, 1997Assignee: Ciba-Geigy CorporationInventor: Rudolf Hurter
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Patent number: 5434251Abstract: Symmetric azo dyestuffs of the formula ##STR1## wherein the substituents have the meaning given in the description, produce improved dyeings or prints on wool and cellulose materials.Type: GrantFiled: April 2, 1993Date of Patent: July 18, 1995Assignee: Bayer AktiengesellschaftInventor: Karl-Josef Herd
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Patent number: 5047514Abstract: Reactive dyes which contain at least one radical of the formula--SO.sub.2 --CH.dbd.CH.sub.2 (1a)or--SO.sub.2 --CH.sub.2 CH.sub.2 --X (1b)and at least one radical of the formula ##STR1## in which X is an inorganic or organic radical detachable under alkaline conditions, R is hydrogen or substituted or unsubstituted C.sub.1-4 -alkyl, Y is oxygen or sulfur and R.sub.1 is a substituted or unsubstituted aliphatic radical, give dyeings or prints having good fastness properties.Type: GrantFiled: November 5, 1987Date of Patent: September 10, 1991Assignee: Ciba-Geigy CorporationInventors: Peter Scheibli, Karl Seitz
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Patent number: 5037964Abstract: (i) Metal-free compounds of the formula ##STR1## These compounds are useful as dyes for paper and textiles.Type: GrantFiled: October 17, 1986Date of Patent: August 6, 1991Assignee: Sandoz Ltd.Inventors: Helmut A. Moser, Roland Wald
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Patent number: 4906736Abstract: Water-soluble copper complex formazan compounds which conform to the general formula (1) below and have useful fiber-reactive dye properties and dye carboxamido- and/or hydroxy-containing material, in particular cellulose fibers, in fast blue shades. ##STR1## in which: M is hydrogen or a salt-forming metal atom,k, m and n each denote the number zero, 1 or 2, the sum (k+m+n) being equal to 1 to 4,A is a benzene or napththalene ring which additionally can contain the fiber-reactive group --NH--Q and further substituents,B is a benzene or naphthalene ring which additionally contains the fiber-reactive group --NH--Q and further substituents,D is substituted or unsubstituted alkylene of 1 to 8 carbon atoms or is a benzene or naphthalene ring having optionally additional substituents or is a heterocyclic radical,X is a sulfo group or an oxy or carbonyloxy group,r is the number 1 or 2,Q is a radical of the formula (2) ##STR2## in which Y is halogen, Z is vinyl or a .beta.Type: GrantFiled: February 23, 1988Date of Patent: March 6, 1990Assignee: Hoechst AktiengesellschaftInventors: Gunther Schwaiger, Hartmut Springer, Werner H. Russ
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Patent number: 4791194Abstract: An azo compound with the following general formula (I): ##STR1## wherein X is selected from the group consisting of hydrogen atom, lower alkyl group, lower alkoxy group, halogen atom and cyano group;Y is phenylene or naphthylene group;Z.sub.1 and Z.sub.2 are independently the divalent group represented by the following formula: ##STR2## wherein A is a divalent group derived from the aromatic hydrocarbon or heterocyclic compound including one or more nitrogen atoms in the ring; andn is 1 or 2,is disclosed. Such compounds are useful in forming a photosensitive layer of an electrophotographic photoreceptor.Type: GrantFiled: July 25, 1986Date of Patent: December 13, 1988Assignee: Mitsubishi Chemical Industries, Ltd.Inventors: Tetsumi Suzuki, Tetsuo Murayama, Hitoshi Ono, Shinji Aramaki, Michiyo Yokoyama
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Patent number: 4734489Abstract: An azo compound of the formula: ##STR1## wherein R is of the formula: ##STR2## R.sub.1 is hydrogen, methyl or --SO.sub.3 M; R.sub.2 is hydrogen or --SO.sub.3 M; R.sub.2 is hydrogen or --SO.sub.3 M; R.sub.3 is C.sub.4 -C.sub.18 alkyl and M is hydrogen, an alkali metal, ammonium or organic ammonium, provided that when R includes --SO.sub.3 M, R.sub.1 l and R.sub.2 are not --SO.sub.3 M, and when R does not include --SO.sub.3 M, either one of R.sub.1 and R.sub.2 is --SO.sub.3 M, which is useful as a black dyestuff for a solvent type ink composition, particularly for ink jet recording.Type: GrantFiled: March 27, 1986Date of Patent: March 29, 1988Assignees: Taoka Chemical Company, Limited, Sumitomo Chemical Company, LimitedInventors: Shinjiro Kawasaki, Hideo Kitagawa, Yutaka Nishii, Hideo Kawashita, Minoru Akagi
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Patent number: 4686287Abstract: Disazo compounds of the formula I ##STR1## in which X and Y are identical or different and denote hydrogen, bromine, chlorine, methyl, methoxy, ethoxy, nitro, trifluoromethyl, carbomethoxy or carboethoxy, A.sup.1 and A.sup.2, independently of each other, represent hydrogen, methyl or ethyl and Z.sup.1 and Z.sup.2 in the 6- or 7-position of the heteroaromatic ring system, independently of each other, represent hydrogen, bromine, chlorine, methyl, methoxy, ethoxy, carbomethoxy, carboethoxy or nitro, are obtained by coupling a monodiazotized p-diaminobenzene substituted by X and Y analogously to the formula I with a 5-acetoacetylaminobenzimidazolone which carries the radicals A.sup.1 and Z.sup.2 analogously to the formula I, and reacting the resulting aminoazo compound after another diazotization with a 5-acetoacetylaminobenzimidazolone which carries the radicals A.sup.2 and Z.sup.2 analogously to the formula I, to give the disazo compound of the formula I.Type: GrantFiled: April 3, 1985Date of Patent: August 11, 1987Assignee: Hoechst AktiengesellschaftInventor: Klaus Hunger
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Patent number: 4677200Abstract: The invention relates to aminoazo compounds of the formula I ##STR1## in which X and Y are identical or different and denote hydrogen, chlorine, bromine, methyl, methoxy, ethoxy, nitro, trifluoromethyl, carbomethoxy or carboethoxy, A represents hydrogen, methyl or ethyl, and Z in the 6- or 7-position of the heteroaromatic ring system is hydrogen, chlorine or bromine, methyl, methoxy, ethoxy, carbomethoxy, carboethoxy or nitro.The compounds of the formula I are prepared by coupling a monodiazotized p-diaminobenzene substituted by X and Y analogously to the formula I with a 5-acetoacetylaminobenzimidazolone which carries the radicals A and Z analogously to the formula I. In the case where X, Y or Z does not denote a nitro group, it is possible to use in place of the p-diaminobenzene derivative a p-aminonitrobenzene derivative which is disubstituted by X and Y in the 2- and 5-positions.Type: GrantFiled: April 3, 1985Date of Patent: June 30, 1987Assignee: Hoechst AktiengesellschaftInventor: Klaus Hunger
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Patent number: 4647286Abstract: Reactive dyes of the formula ##STR1## in which M is twice-coupled 1-amino-8-hydroxynaphthalene-3,6-disulfonic acid, 1-amino-8-hydroxynaphthalene-4,6-disulfonic acid, 1-amino-8-hydroxynaphthalene-4-sulfonic acid or 2-amino-5-hydroxynaphthalene-7-sulfonic acid, A and B, independently of each other, are each sulfophenylene or sulfonaphthylene which can be further substituted, and X.sub.1 and X.sub.2 are each a 2,4-difluoro-5-chloropyrimid-6-yl radical, subject to the condition that A and B together contain at least 3 sulfo groups, are particularly suitable for dyeing and printing cellulose-containing fibre materials and produce, in high dyeing yield, dyeings and prints having good fastness properties.Type: GrantFiled: August 20, 1985Date of Patent: March 3, 1987Assignee: Ciba-Geigy CorporationInventor: Karl Seitz
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Patent number: 4581445Abstract: There are described novel cationic benzothiazole disazo compounds of the formula ##STR1## K independently of one another are each a coupling component, R independently of one another are each an unsubstituted or substituted C.sub.1 -C.sub.4 -alkyl group,R.sub.1 independently of one another are each hydrogen, unsubstituted or substituted C.sub.1 -C.sub.4 -alkyl, unsubstituted or substituted C.sub.1 -C.sub.4 -alkoxy, or halogen,X is the direct bond, --(CH.sub.2).sub.y wherein y is a number from 1 to 4, --CH.dbd.CH--, a phenylene group, a naphthylene group, a heterocyclic radical, an --NH-alkylene-(C.sub.1 -C.sub.6)--NH-- radical or an --NH-arylene-NH-- radical, andAn is an anion, with the proviso that when the coupling component K is a dimethylaminophenyl radical, the divalent bridge member X is not the --(CH.sub.2).sub.2 -- group are useful for dyeing and printing textile materials, leather and in particular paper. The dyeings obtained have good fastness properties, especially good fastness on paper to light.Type: GrantFiled: September 16, 1983Date of Patent: April 8, 1986Assignee: Ciba-Geigy CorporationInventor: Visvanathan Ramanathan