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5744623 |
Terpene-quinones with antitumour activity
Terpene-quinone with antitumor activity defined from a cyclocondensation reaction of Diels-Alder, used to obtain families or series of said compounds having a new structure and presenting a...
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5679808 |
Tertiary non-linear optical material
The present invention discloses a tertiary non-linear optical material comprising a quinone derivative expressed by any one of the general formulas: ##STR1## wherein R 1 , R 2 , R 3 , R 4 , R 5 ...
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5639718 |
Multifunctional viscosity modifiers for lubricating oil compositions with improved dispersancy and antioxidancy derived from adducts of quinone
An oil-soluble lubricating oil and fuel additive, useful as a multifunctional viscosity modifier comprising succinimide and other amine-containing polymers reacted with a quinone or substituted...
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5175318 |
Process for the preparation of quinones
Phenols are oxidated to quinones with hydrogen peroxide in the presence of catalytic amounts of bromine, iodine, hydrogen bromide and hydrogen iodide.
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5175319 |
Naphthoquinone derivatives
Novel antiprotozoal naphthoquinones having the general formula ##STR1## (wherein either R 1 is hydrogen and R 2 is selected from C 1 -6 alkoxy, aralkoxy, C 1 -6 alkyl-C 1 -6 alkoxy, phenyl...
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4933489 |
Process for the manufacture of 6-chloro-1,4-diacetoxy-2,3-dimethoxynaphthalene
An improved process for the manufacture of the antipsoriatic agent, 6-chloro-1,4-diacetoxy-2,3-dimethoxynaphthalene, is herein described which involves in situ Diels-Alder coupling of...
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4880571 |
Process for the preparation of 5-nitro-1,4-naphthoquinone
A process for the preparation of 5-nitro-1,4-naphthoquinones of formula ##STR1## wherein R is hydrogen, a C 1 -C 4 alkyl radical or a C 1 -C 4 alkoxy radical, by oxidation of 1-nitronaphthalene...
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4698184 |
Tellurium imaging composition including improved reductant precursor and method
Imaging films and film-forming compositions are provided which include a reducible tellurium compound, a reductant precursor, a source of labile hydrogen incorporated in a matrix. The reductant...
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4689179 |
Method for production of fluorinated quinones
A method for the production of a fluorinated quinone, which comprises causing a chlorinated aromatic compound represented by the general formula I: ##STR1## wherein A denotes O, ##STR2## (where m...
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4632782 |
Oxidizing an organic compound
A process for oxidizing an organic compound by ceric sulfate dissolved in an aqueous sulfuric acid solution, wherein the organic compound is oxidized (1) by means of a ceric sulfate-aqueous...
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4628062 |
1,4-naphthoquinone derivatives having anti-inflammatory action
New compounds of the formula ##STR1## in which R 1 is an allylamino, acetylamino or propionylamino radical, R 2 is hydrogen or a 2-methoxyethoxy or ethoxy radical, R 3 is hydrogen or a...
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4592867 |
Synthesis method for reductant precursor
A synthesis method is provided for the synthesis of quinone compounds of the formula ##STR1## where n is 0-3, Y 1 is alkoxy, Y 2 is alkoxy, chloro, bromo or hydrogen and R' and R" each and...
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4576756 |
Production of hydrogen peroxide
Methods, materials and apparatus for production of hydrogen peroxide are disclosed. In one preferred embodiment, high surface area circulating elements derivatized with a quinone catalyst are...
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4532078 |
Reductant precursor for tellurium imaging compositions
Imaging films and film-forming compositions are provided which include a reducible tellurium compound, a reductant precursor, a source of labile hydrogen incorporated in a matrix. The reductant...
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4507241 |
Method for the hydrocarbylation of naphthoquinone derivatives
A method for the hydrocarbylation of naphthoquinones comprising cross-coupling addition of the hydrocarbyl moiety of selected organometallic reagents to leaving group-substituted naphthoquinones.
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4486349 |
Process for preparing para-quinone or ortho-quinone derivatives, possibly alkoxylated or aryloxylated, respectively from the corresonding hydroquinone or pyrocatechic derivatives
Process for preparing a para-quinone or ortho-quinone derivative, possibly alkoxylated or aryloxylated, which consists in oxidizing respectively the corresponding hydroquinone or pyrocatechic...
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4442127 |
Naphthoquinone anti-psoriatic agents
Psoriasis in mammals is relieved by topically administering naphthoquinones of the formula: ##STR1## wherein: R 1 and R 2 are lower alkoxy; and R 3 is halo or cyano.
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4435336 |
Process for the preparation of aromatic aminosulphonic acids
Aminoarylsulphonic acids which have a relatively high purity and a relatively low content of aminoaryldisulphonic acids can be obtained, if they are prepared, from the corresponding arylammonium...
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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...
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4229478 |
Naphthaquinone anti-psoriatic agents
Psoriasis in mammals is relieved by topically administering substituted naphthaquinones of the formula: ##STR1## where R 1 and R 2 are the same or different and are hydrogen, hydroxy, alkoxy or...
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4148918 |
Substituted 2-higher alkyl-3-hydroxy-1,4-naphthoquinone carboxylic acid esters and their use as miticides
This invention relates to novel compounds which are represented by the following formula: ##STR1## wherein R 1 is alkyl of 8-14 carbon atoms either branched, cyclic or straight chain; and R 2 ...
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4038293 |
Silicone-compatible tris(trimethylsilyloxy)silylalkylamino-substituted quinoncid dyestuffs
Quinonoid dyestuffs containing the tris(trimethylsilyloxy)silylalkylamino group, --NH--(CH 2 ) x --Si[OSi(CH 3 ) 3 ] 3 are produced of the formula ##STR1## WHEREIN EACH R 2 and R 3 ...
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4014907 |
2-Hydroxy-3-nitro-1,4-naphthoquinones
Substituted naphthoquinones of the formula (I) and pharmaceutically acceptable salts thereof wherein R 1 , R 2 , R 3 and R 4 represent alkyl, aryl, alkoxy, hydroxy, hydrogen or halogen or any two...
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3941815 |
Process for the preparation of 5-nitro-1,4-naphthoquinone
A process for the preparation of 5-nitro-1,4-naphthoquinone comprising nitrating 1,4-naphthoquinone under such a condition that the dehydrating value of sulfuric acid in the reaction mixture is at...
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3935246 |
Naphthoquinones
Compounds represented by the formula ##SPC1## Wherein R is a cyclopentyl or cycloheptyl and R 1 is a hydrogen, halogen or lower alkoxy, Processes for their production and novel intermediates...
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3931255 |
Process for the production of 5-nitro-1,4-naphthoquinone
5-Nitro-1,4-naphthoquinone is prepared by reducing 8-nitro-1,4-naphthoquinone-1-oxime and/or 5-nitro-1,4-naphthoquinone-1-oxime in an aqueous and/or organic reaction medium in the presence of iron...
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3920695 |
Silicone-compatible indigo dyestuffs
Dyestuffs containing the tris(trimethylsilyloxy)silyalkylamino group, ##EQU1## are produced and are found to be compatible with cured silicone polymers.
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3907841 |
Process for preparing 5-nitro-naphthoquinone-(1,4)
5-NITRO-NAPHTHOQUINONE-(1,4) IS PREPARED BY REDUCING 8-NITRO-NAPHTHOQUINONE-(1,4)-OXIME-(1) AND/OR 5-NITRO-NAPHTHOQUINONE-(1,4)-OXIME-(1) IN AN AQUEOUS ACID MEDIUM AT A TEMPERATURE OF FROM -10° TO...
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3873580 |
Oxidation Process
Process for the liquid phase oxidation of organic compounds, particularly the oxidation of an aromatic nucleus to the corresponding quinone, using an aqueous solution of a persulphate compound as...
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3728361 |
SYNTHESIS OF HALOGENATED NAPHTHOQUINONES
This invention relates to a method of preparing halogenated naphthoquinones by hydrolyzing hexahalogenated dihydronaphthalene in an acid medium, at an elevated temperature and in the presence of...
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3682980 |
AMINOBENZOQUINONES AND AMINONAPHTHOQUINONES AS ADDITIVES FOR IMPARTING OXIDATIVE STABILITY TO ORGANIC COMPOSITIONS
The invention provides new aminobenzoquinones and aminonaphthoquinones, and the substituted members thereof, which are useful as antioxidant additives to organic compounds, especially lubricants....
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3678116 |
PROCESS FOR PREPARING A METHANO-POLY-CYCLIC HYDROQUINONE
A process for preparing a methano-polycyclic hydroquinone which comprises rearranging a corresponding methano-polycyclic quinone under isomerization conditions in the presence of an inert solvent...
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3671552 |
PROCESS FOR THE PREPARATION OF QUINONES AND HYDROQUINONES
Quinones of the formula: In which the symbols R 1 , R 2 , R 3 and R 4 represent hydrogen, halogen, or hydrocarbon radicals, not more than three of the symbols representing hydrogen, are obtained...
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3484461 |
PROCESS FOR THE PRODUCTION OF 2,3-DICHLORONAPHTHOQUINONE-(1,4)
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3433812 |
PREPARATION OF 2,3-DICHLORO-1,4-NAPHTHOQUINONE FROM NAPHTHALENE
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3396178 |
Production of chloroquinones
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3309400 |
Process for the production of phthaloylpyrrocolines
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3287129 |
Light-sensitive photographic elements containing developing agent precursors
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3273955 |
Process for reduction of vat anthraquinone dyestuffs
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3235569 |
Reaction product of epichlorohydrin and a rearranged hexachlorocyclopentadiene-benzoquinone adduct
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3114755 |
Process for preparing bis-(monosubstitutedamino)-benzoquinones and monosubstitutedamino-naphthoquinones
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3070492 |
Insect control compositions and methods
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3066153 |
Process for preparing halonaphthoquinones
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3037995 |
Production of derivatives of 2-aminoquinones-1, 4
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2975196 |
Chlorination of naphthoquinone
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2955117 |
Manufacture of halogenated organic compounds
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2943097 |
Bis-sulfones by reaction of quinones with bis-sulfinic acids
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2934544 |
Polynuclear quinones
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2913453 |
N-carboxylates of amino 1, 4-quinones
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2891074 |
Aromatic compounds containing fluorine and a process of preparing them
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