Class 568/711 - Dinitro

Subclass of Class 568 - Organic compounds -- part of the class 532-570 series
Definition: Compounds which contain exactly two -NO₂ groups.
No. of patents: 33
Last issue date: 05/12/2009

Number	Title	Issue Date
7531702	Picric acid explosive compound and environmentally friendly methods for making the same An environmentally friendly picric acid explosive comprising, providing a nitromalondialdehyde, providing a dinitroketone, reacting the nitromalondialdehydes with the dinitroketone to produce a mixture, and subjecting the mixture to a cyclodehydrative mechanism to p...	05/12/2009
7005553	Method for the nitration of phenolic compounds A method for the regioselective ortho-directed nitration of phenolic compounds useful for the preparation of ortho-nitro-phenols according to formula (I) is described. ...	02/28/2006
6960696	2,4-dinitrophenol and environmentally friendly methods for making the same An environmentally friendly methods for making 2,4-dinitrophenyl compound comprising, providing a nitromalondialdehyde, providing a nitroacetone, reacting the nitromalondialdehydes with the nitroacetone to produce a mixture, and subjecting the mixture to a cyclodehy...	11/01/2005
6359180	Production method of 4,6-diaminoresorcin The present invention relates to a novel production method of 4,6-diaminoresorcin, and to 2-sulfonic acid-4,6-dinitroresorcin as its intermediate and salts thereof. The target compound is obtained by (R1) sulfonating resorcin (A) to obtain resorcin 2,4,6-...	03/19/2002
6339177	Dinitroalkyl aromatics polymerization retarders or inhibitors and methods for making and for using same A vinyl monomer inhibitor systems is disclosed which includes 2,6-dinitro-4-alkylated phenols and mixtures of 2,6-dinitro-4-alkylated phenols and 2,4-dinitro-6-alkylated phenols as well as vinyl monomer stabilized composition including an effective amount...	01/15/2002
5874654	Purification of mixtures of nitroaromatic compounds by removing nitrocresols therefrom Environmentally-polluting nitrocresol values are removed from admixtures of nitroaromatic compounds comprised thereof, notably the media of nitration of aromatic compounds by reacting same with aqueous HNO3 /H2 SO4, by fir...	02/23/1999
5602283	Multi-stage process for preparing N-alkyl-3,4-dialkyl-2,6-dinitroanilines A multistage process of preparing N-alkyl-3,4-dialkyl-2,6-dinitroanilines starts from 3,4-dialkyl phenol and goes through the stages of 3,4-dialkyl-2,6-dinitrophenol and 3,4-dialkyl-2,6-ditro alkoxybenzene, wherein the latter are new compounds....	02/11/1997
5475148	Process and intermediate to prepare N-alkyl-3,4-dialkyl-2,6-dinitro-anilines The intermediate ##STR1## wherein R is a lower alkyl group, is used to prepare a N-alkyl-3,4-dialkyl-2,6,-dinitro-aniline in a relatively simple, inexpensive and safe fashion, and with a high yield....	12/12/1995
5371303	One-step preparation of 4,6-dinitroresorcinol from resorcinol 4,6-Dinitroresorcinol is prepared by reacting resorcinol with concentrated nitric acid that is substantially free of suboxides of nitric acid. It has been found that greater than 60 percent yields of the desired product can be obtained when the concentrat...	12/06/1994
5283352	Pharmacologically active compounds, methods for the preparation thereof and compositions containing the same Catechol compounds of formula I ##STR1## where R1, R2, R3 and X are as described herein are effective Catechol-O-methyltransferase inhibitors....	02/01/1994
5070197	Dry reactive processing A method of preparing a water-soluble or water-dispersible pesticidal composition is described. The pesticidal composition is prepared in a continuous process by intimately mixing a Bronsted acid precursor of the pesticidally active compound with a Bronst...	12/03/1991
4982001	Process for the preparation of amino-1,3-benzenediol High purity amino-1,3-benzenediols are prepared by (a) contacting a 1,3-bis(alkylcarbonato)benzene with a nitrating agent under reaction conditions such that a 1,3-bis(alkylcarbonato)nitrobenzene is formed, (b) contacting the 1,3-bis(alkylcarbonato)nitrob...	01/01/1991
4962198	Process for the hydroxylation of electrophilic aromatic compounds The invention relates to a generally applicable process for the hydroxylation of electrophilic aromatic compounds, according to which the electrophilic aromatic compounds are reacted with organic hydroperoxides in the presence of bases....	10/09/1990
4912246	1,3-bis(alkylcarbonato)-nitrobenzenes High purity amino-1,3-benzenediols are prepared by (a) contacting a 1,3-bis(alkylcarbonato)benzene with a nitrating agent under rection conditions such that a 1,3-bis(alkylcarbonato)nitrobenzene is formed, (b) contacting the 1,3-bis(alkylcarbonato)nitrobe...	03/27/1990
4766244	High purity process for the preparation of 4,6-diamino-1,3-benzenediol High purity 4,6-dinitro-1,3-benzenediol is prepared by (a) contacting a 1,2,3-trihalobenzene with a nitrating agent and an acid under reaction conditions such that a 1,2,3-trihalo-4,6-dinitrobenzene is produced, (b) contacting the 1,2,3-trihalo-4,6-dinitr...	08/23/1988
4745232	Process for preparing 4,6-dinitroresorcinol A method of nitrating resorcinol which is selective for the production of the 4,6-dinitro resorcinal isomer. A resorcinol-based starting material is admixed with a nitrating solution from which substantially all nitrogen dioxide and nitrous has been remov...	05/17/1988
4664845	Phenylenediamine solubilizer for dinitrophenol in aromatic solvent Compositions, comprised of a dinitrophenol in an aromatic hydrocarbon solvent, which compositions further comprise a sufficient amount of a phenylenediamine such that a greater amount of dinitrophenol is in solution than would be present in solution if su...	05/12/1987
4581178	Addition of aldehydes to organic compounds having a carbon-hydrogen bond activated by a nitro or nitrile group Low valent transition metal complexes containing small cone angle phosphine or arsine ligands efficiently catalyze addition of aldehydes to compounds or groups having a C--H bond activated by a nitro or nitrile group, to provide nitroalcohols or cyanohydr...	04/08/1986
4540832	Process for the preparation of 6-chloro-2,4-dinitrophenol A process for the preparation of 6-chloro-2,4-dinitrophenol in a high yield and in a high degree of purity by saponifying 2,4-dinitrochlorobenzene and/or 2,4-dinitrophenyl alkyl ethers of the formula ##STR1## in which m denotes the number 2, 3 or 4 a...	09/10/1985
4538006	Aromatic coupling process 4-(2,4-Dinitrophenyl)phenols are prepared by reacting a 1,3-dinitrobenzene having a replaceable hydrogen in the 4-position with a phenol having a replaceable hydrogen in the 4-position in an inert solvent and in the presence of a strong base. The 1,3-dini...	08/27/1985
4524222	Alkylated phenol purification Dinitro alkyl phenols are produced free of tar when the precursor orthoalkylphenol is contacted with a molecular sieve prior to sulfonation, nitration, and air drying. The dinitro alkylphenols produced are free of tars or similar resins and avoid processi...	06/18/1985
4473713	Hydrolysis of aryl-aliphatic ethers At least one of the other functions comprising an aryl-aliphatic ether, e.g., veratrol, is catalytically hydrolyzed with water, e.g., to guaiacol, in the presence of a catalytically effective amount of a salt of a carboxylic acid....	09/25/1984
4439374	Process for sulfonating impure ortho alkylphenol The sulfonation of o-alkylphenols by reaction with sulfuric acid is improved to give higher conversion to disulfonated o-alkylphenol by adding a small amount of a polybasic carboxylic acid (e.g. oxalic acid) to the o-alkylphenol. The sulfonated product is...	03/27/1984
4434304	Synthesis of trinitrophloroglucinol A one pot process for the preparation of trinitrophloroglucinol by the addition of a nitric acid and sulfuric acid mixture to phloroglucinol in sulfuric acid where the nitric acid and phloroglucinol are present in stoichiometric amounts....	02/28/1984
4360469	Preparation of quinones by salcomine-catalyzed oxidation of phenols It has been found that unexpectedly high yields of a high purity product can be obtained when substituted p-quinones are prepared by oxidation, using a molecular oxygen-containing gas, of the corresponding phenols in an inert solvent having a dipole momen...	11/23/1982
4347148	Full and lubricant compositions containing nitro phenols Nitro phenols of the general formula ##STR1## wherein R is an aliphatic substituent of at least about 40 carbon atoms, a, b and c are, for example, each 1, 2 or 3, and Ar is an aromatic moiety such as a benzene nucleus, naphthalene nucleus or linked ...	08/31/1982
4283565	Process for preparing benzylalcohols There is described an essentially two step process for the preparation of benzylalcohols including those benzylalcohols having substituents on the benzyene ring by reaction of a substituted or unsubstituted benzyl halide with a formate typically an alkali...	08/11/1981
4282160	Novel triarylmethane compounds The present invention is concerned with novel compounds useful in photographic products and processes comprising triarylmethane dyes possessing in their triaryl structure a 4'-oxo-1'-naphthylidene (or a 4'-oxo-1'-phenylidene) moiety and a phenyl moiety su...	08/04/1981
4224244	9-Phenyl 5,6-dimethyl-nona-2,4,6,8 tetraenal or tetraenol derivatives Novel 9-phenyl 5,6-dimethyl-nona-2,4,6,8-tetraenoic acid, tetraenal or tetraenol derivatives useful as anti-tumor agents....	09/23/1980
4101591	Ethynylbenzene compounds and derivatives thereof Haloloweralkyl ethynylbenzene compounds and their derivatives which are useful for the treatment for the relief of inflammation, pain and fever....	07/18/1978
3981933	Process for making dinitrotoluene Nitrated derivatives of aromatic compounds are obtained by contacting the latter, in the presence of methylene chloride as a reaction medium, with concentrated nitric acid in the presence of concentrated sulfuric acid, and thereafter isolating the formed ...	09/21/1976
3933926	Preparation of nitrophenols A process for the preparation of nitrophenols by adding over a period of time a suspension containing from about 4 to about 20 per cent weight/volume of nitrosated phenol to a nitric acid solution containing between 45 and 100 per cent by weight of nitric...	01/20/1976
3933927	Phenol transalkylation process Phenols having an unsubstituted ortho position are transalkylated in the ortho position by mixing them with an ortho-alpha-branched alkylphenol (e.g., 2,6-di-sec-butylphenol) and an aluminum phenoxide catalyst and heating the mixture to 100°-350°C., pre...	01/20/1976

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Class 568/711 - Dinitro