Class 552/246 - Oxygen bonded directly to the nitrogen (e.g., nitro bonded directly at 8 position, etc.)

Subclass of Class 552 - Organic compounds -- part of the class 532-570 series
Definition: Compounds wherein the nitrogen has oxygen bonded directly
No. of patents: 28
Last issue date: 10/02/2007

Number	Title	Issue Date
7276537	Formulations of anthraquinone derivatives A compound of formula (I): in which A is a C alkylene group with a chain length between NH and N(O)R′R″ of at least 2 carbon atoms and R′ and R″ are each separately selected from C1-4 alkyl groups and C2-4 hydroxyalkyl and C2-4	10/02/2007
7179308	Ethylenically-unsaturated blue anthraquinone dyes This invention pertains to certain novel colorant compounds containing one or more ethylenically-unsaturated, photopolymerizable radicals that may be copolymerized (or cured) with ethylenically-unsaturated monomers to produce colored compositions such as colored acr...	02/20/2007
7172634	Ethylenically-unsaturated blue anthraquinone dyes This invention pertains to certain novel colorant compounds containing one or more ethylenically-unsaturated, photopolymerizable radicals that may be copolymerized (or cured) with ethylenically-unsaturated monomers to produce colored compositions such as colored acr...	02/06/2007
7074835	Formulations of anthraquinone derivatives A compound of formula (I): in which A is a C alkylene group with a chain length between NH and N(O)R′R″ of at least 2 carbon atoms and R′ and R″ are each separately selected from C1-4 alkyl groups and C2-4 hydroxyalkyl and C2-4	07/11/2006
5480873	Pharmaceutical compounds Pharmaceutical compounds of the formula ##STR1## in which R1 and R2 are each hydrogen, hydroxyl, halo, C1-4 alkyl, C1-4 alkoxy, acyloxy, --O-glucoside, optionally substituted phenyl or optionally substitute...	01/02/1996
5387704	Preparation of anthraquinones Process for preparing amino- and carbamoyl-substituted anthraquinones by Diels-Alder reaction of an N-butadienylcarbamic acid ester of the formula H2 C.dbd.CH--CH.dbd.CH--NH--COOR2, wherein R2 is alkyl or phenylalkyl, with...	02/07/1995
4916244	Preparation of 1-amino-4-hydroxy-2-(6'-hydroxyhexoxy)-anthraquinone 1-Amino-2-(6'-hydroxyhexoxy)-4-hydroxyanthraquinone (I) is prepared from the corresponding 2-phenoxy- or 2-halo-anthraquinone compound and 1,6-hexanediol with or without a phenol in the presence of an alkaline agent at elevated temperatures by reacting, p...	04/10/1990
4902787	Method for producing lightfast disperse dyestuffs containing a build-in photostabilizer [molecule] compound A method of producing a UV lightfast disperse dyestuff comprising selecting a disperse dyestuff having predetermined chromophoric groups, selecting a photostabilizer compound, designing a hybrid disperse dye molecular structure which contains the chromoph...	02/20/1990
4518535	Preparation of electrically conductive systems from substituted phenalenes, and the products obtained Air-stable, electrically conductive systems having conductivities greater than 1×10-3 Ω-1 cm-1 are prepared by reacting a metal cation of an element of sub-group VII, VIII or I of the periodic table with a 1,9-substitute...	05/21/1985
4464282	Organic materials A material suitable for a guest-host liquid crystal device comprises a solution of a liquid crystal material and a pleochroic dye wherein the pleochroic dye comprises at least one anthraquinone compound free from water solubilizing and ionic substituents ...	08/07/1984
4424160	Process for the preparation of 1-hydroxy-4-amino-5(8)-nitroanthraquinone 1-Hydroxy-4-amino-5- or -8-nitroanthraquinone is obtained in high yields and in high purity when 1,8-dinitroanthraquinone or 1,5-dinitroanthraquinone respectively is reacted below 80° C. in oleum in the presence of boric acid with reducing agents. The pr...	01/03/1984
4405211	Liquid crystal compositions with pleochroic anthraquinone dyes A material suitable for a guest-host liquid crystal device comprises a solution of a liquid crystal material and a pleochroic dye wherein the pleochroic dye comprises at least one compound having a formula: ##STR1## wherein: R represents a group sele...	09/20/1983
4363743	Liquid crystals having pleochroic dyes Anthraquinone dyes of the general formula: ##STR1## wherein R1, R3, R4 and R6 are selected from the group consisting of H, OH, OCH3, NO2, NH2 and NHCH3 ; R2	12/14/1982
4342701	Process for the preparation of 4,5-dinitro-1,8-dihydroxyanthraquinone 95-99% pure 4,5-dinitro-1,8-dihydroxyanthraquinone which is essentially free from by-products is obtained by "direct nitration" of 1,8-dihydroxyanthraquinones or 1,8-dimethoxyanthraquinones if the concentrations of acid are chosen such that, when the nitr...	08/03/1982
4309221	Anthraquinone derivatives Anthraquinone derivatives of the formula ##STR1## or of the tautomeric formula ##STR2## in which A denotes an anthraquinone radical which is free from sulphonic acid groups and is optionally further substituted and which preferably consists...	01/05/1982
4250102	Process for the manufacture of aminohydroxyanthraquinones The invention relates to a process for the manufacture of an aminohydroxyanthraquinone of the formula ##STR1## wherein both of X are hydrogen or one X is --NH2 and the other is --OH and Z is hydrogen, C1 -C4 alkyl or ...	02/10/1981
4154747	Production of virtually pure 1-amino-8-nitro-4,5-dihydroxyanthraquinone A process for the preparation of 1-amino-8-nitro-4,5-dihydroxyanthraquinone by partially reducing the corresponding dinitrohydroxyanthraquinone and isolating the reduction product, in which crude 1,8-dinitro-4,5-dihydroxyanthraquinone obtained by nitratin...	05/15/1979
4137243	Polymeric anthraquinone derived colorants Polymeric anthraquinone derived colorants having improved light and alkali fastness properties represented by the formula: ##STR1## wherein R1 is a member selected from the group consisting of H, OH, a halogen, NH2, NO2	01/30/1979
4136100	Anthraquinoid dyes Dyes of the formula ##STR1## where Y is alkyl of 3 to 18 carbon atoms or phenyl which is unsubstituted or substituted by chlorine, bromine, alkoxy of 1 to 4 carbon atoms, alkoxycarbonyl (where alkoxy is of 1 to 4 carbon atoms), phenoxy, benzoyla...	01/23/1979
4086252	Process for the manufacture of anthraquinone compounds Process for the production of ଱-(carboxyethylamino)anthraquinones by reacting an ଱-aminoanthraquinone with an alkenyl carboxylic acid in sulphuric acid medium containing boric acid, metaboric acid or boric oxide....	04/25/1978
4083858	Anthraquinone dyes A process for the manufacture of water-soluble anthraquinone dyes having the general formula: ##STR1## wherein Z represents an optionally substituted hydrocarbon residue carrying at least one half sulphuric acid ester or sulphonic acid group whi...	04/11/1978
4078890	Process for the dyeing and printing of polyester material The invention relates to a process for the dyeing and printing of polyester material in a weakly acid, neutral or alkaline solution of at least one altered dispersion dyestuff water-soluble at an intermediate stage and containing a carbacyl group which is...	03/14/1978
4076736	Preparation of aminoanthraquinones from nitroanthraquinones In the reaction of a nitroanthraquinone with ammonia in a solvent at elevated temperature to produce the corresponding aminoanthraquinone, the improvement which comprises effecting the reaction in the presence of an ammonium halide. Advantageously, the ni...	02/28/1978
4048199	Production of aminonitrodihydroxyanthraquinones by partial reduction dinitrodihydroxyanthraquinones The production of aminonitrodihydroxyanthraquinones of the formula: ##STR1## in which one X is OH and the other X is NO2 by partial reduction of the corresponding dinitrodihydroxyanthraquinone or mixtures thereof by heating at 80°-250° C...	09/13/1977
4008222	Anthraquinone dyestuffs Anthraquinone dyestuffs suitable for use in dyeing and printing synthetic fiber material, particularly polyesters, and process for their preparation which comprises reacting an anthraquinone which contains, in at least one ଲ-position, a reactive gro...	02/15/1977
3968130	Process for the nitration of anthraquinones The invention relates to a process for the manufacture of anthraquinones which are mononitrated in the ଱-position, especially 1-nitroanthraquinone, wherein an anthraquinone which possesses at least 1 free ଱-position and is optionally substitut...	07/06/1976
3944540	Precipitation of organic dyes and dye intermediates in the presence of finely divided polytetrafluoroethylene Organic dyes or dye intermediates are crystallizable in an aqueous medium in the presence of finely divided, solid polytetrafluoroethylene (hereinafter referred to as "PTFE") resin particles. Crystals of desirable, very small size are precipitated more qu...	03/16/1976
3935248	Anthraquinone dyes A water-soluble anthraquinone dye having the general formula: ##SPC1## Wherein Z represents an optionally substituted hydrocarbon residue carrying at least one half sulphuric acid ester or sulphonic acid group. The dyes are suitable for the coloration of ...	01/27/1976

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Class 552/246 - Oxygen bonded directly to the nitrogen (e.g., nitro bonded directly at 8 position, etc.)