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JPS58121238A |
PURPOSE: To prepare anthraquinone, in one step, economically in an industrial scale, by reacting toluene with oxygen in vapor phase in the presence of a catalyst containing Ag, Fe, Mo and/or phosphoric acid salt. CONSTITUTION: Anthraquin...
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JPS5833204B2 |
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JPS5828858B2 |
A process for producing 1,4-naphthoquinone by oxidizing naphthalene with molecular oxygen in a vapor phase in the presence of a catalyst. The catalyst is made of a mixture of a carrier and fusible catalytic components including vanadium ...
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JPS5899431A |
(57) [Abstract] Since this gazette is application data in front of an electronic application, the data of an abstract is not recorded.
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JPS5826897B2 |
A scale deposition from an aqueous slurry of naphthoquinone and phthalic acid can be prevented by adding fine crystals of phthalic acid to the aqueous slurry of naphthoquinone and phthalic acid collected, which slurry is obtained by cont...
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JPS5826327B2 |
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JPS5825650B2 |
To isolate naphthoquinone and phthalic anhydride from the gas obtained in the gas phase oxidation of naphthalene, the gas product at 250 DEG to 500 DEG C is first quenched with a counter-current liquid stream of naphthalene, naphthoquino...
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JPS5825651B2 |
There is provided a novel method of synthesizing certain tetracyclic quinones. In particular, there is provided a novel route to the synthesis of (+)-7-deoxydaunomycinone and analogs thereof, which includes the provision of novel tri- an...
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JPS5823859B2 |
A process for producing a 2-tertiary-alkyl substituted anthraquinone, characterized by carrying out catalytic oxidation of a diphenylmethane type compound having the formula: wherein R1 and R2 are different from each other, and independe...
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JPS5823858B2 |
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JPS5859937A |
PURPOSE: To obtain an optically pure titled compound, economically, from optically pure 4-demethoxy-7-deoxydaunomycinone dimethyl ether, easily, in high yield, by resolving the starting raw material with dialkyl ether. CONSTITUTION: A cr...
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JPS5852238A |
NEW MATERIAL:Optically active 4-demethoxyadriamycinone of formulaI. USE: Synthetic intermediate for non-natural type 4-demethoxyadriamycin-(carcinostatic agent). The carcinostatic agent exhibits the carcinostatic effect same as the natur...
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JPS5846038A |
(57) [Abstract] Since this gazette is application data in front of an electronic application, the data of an abstract is not recorded.
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JPS5841839A |
PURPOSE: To obtain the titled compound by using a specific compound which is a crystalline material at normal temperature and stable to purification, drying and storage for a long period, as a starting raw material, converting the Br ato...
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JPS5812266B2 |
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JPS5811936B2 |
In a process for purifying naphthoquinone obtained by gas phase catalytic oxidation of naphthalene, the improvement which comprises contacting a solution of the naphthoquinone dissolved in a solvent capable of dissolving naphthoquinone a...
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JPS5811937B2 |
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JPS5826839A |
PURPOSE: To prevent the incrase in the air permeation resistance in a catalytic bed, stabilize the operation and improve the yield in oxidizing naphthalene in the vapor phase in the presence of a catalyst containing vanadium oxide-alkali...
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JPS588373B2 |
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JPS5824537A |
(57) [Abstract] Since this gazette is application data in front of an electronic application, the data of an abstract is not recorded.
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JPS582206B2 |
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JPS57206633A |
PURPOSE: To purify anthraquinone, by oxidizing a crude anthraquinone obtained by oxidizing a Diels-Alder reaction adduct of 1,4-naphthoquinone with butadiene in an aqueous medium in the presence of chlorine dioxide. CONSTITUTION: A Diels...
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JPS57188542A |
PURPOSE: To prepare the titled compound useful as a drug, without protecting the side chain ketone group, by using a compound such as 9-acetyl-6,9,11-trihydroxy-7,8,9,10-tetrahydronaphthacene-5,
12-dione, as a raw material. CONSTITUTION:...
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JPS5753135B2 |
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JPS5747894B2 |
This invention concerns a process for oxidizing phenol and substituted phenols to their corresponding p-benzoquinones with oxygen in the presence of catalysts selected from metallic copper and copper salts promoted by thiocyanate, cyanat...
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JPS5747169B2 |
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JPS57145828A |
PURPOSE: To prepare a 7-OH anthracyclinone derivative by introducing a halogen to the 7-position of a 7-desoxyanthracyclinone derivative, reacting the product with a trifluoroacetic acid metal salt to convert the halogen to OCOCF3 group,...
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JPS57144235A |
PURPOSE: To prepare anthraquinone useful as a synthetic intermediate of dyes, etc., in high yield, by using diphenylmethane as the starting material, and oxidizing with an oxygen-containing gas in the presence of a catalyst containing va...
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JPS57118540A |
Bis-aminomethyl-anthraquinone derivs. of formula (I) and their salts with acids are new. R1 and R2 are each H or 1-4C alkyl, or R1 and R2 together form a 4-6C alkylene residue so that N(R1)(R2) is a 5- to 7-membered heterocyclic ring whi...
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JPS5734313B2 |
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JPS57108033A |
PURPOSE: To obtain muconic acid anhydride, α-pyrone or dimerized product useful for preparing a synthetic high polymer or medicine advantageously, by oxidizing an o-substituted phenol in the presence of a ruthenium catalsyt in an oxygen...
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JPS5721309B2 |
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JPS5770834A |
PURPOSE: To prepare coenzyme Q useful as a remedy for cardiac insufficiency, rapidly, without side reactions, with simple operation, by the catalytic oxidation of reduced coenzyme Q in a hydrophobic solvent using manganese dioxide. CONST...
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JPS5762237A |
PURPOSE: To prepare the titled compound, economically, by the moving bed catalytic reaction of benzene with a mixture of phthalic anhydride and an inert gas at a high temperature, controlling the reaction temperature by the indirect heat...
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JPS5712600B2 |
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JPS5742649A |
NEW MATERIAL:A compound shown by the formula [R1 is halogen or -OR2(R2 is H or lower alkanoyl)]. EXAMPLE: 5, 7, 8, 9, 10, 12-Hexahydro-5,12-dioxo-6,11-diol-7,9-cis-diol-9-bromoacetyl
naphthacene. USE: An intermediate for preparing 4-desm...
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JPS57500352A |
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JPS5732242A |
PURPOSE: The reaction mixture gas after thermal catalysis between benzene and phthalic anhydride is passed through a tubular type cooler at such a flow rate as the precipitating particles do not stick to the tube walls and brought into c...
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JPS5731637A |
PURPOSE: To prepare the titled compound economically in an industrial scale, by the catalytic vapor phase reaction of a gas containing benzene and phthalic acid anhydride, using a catalyst obtained by mixing a magnesia-silica mixture wit...
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JPS5732243A |
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JPS576910B2 |
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JPS5724323A |
PURPOSE: To obtain anthraquinone useful as an intermediate for dyes or an additive for preparing paper or pulp, by reacting inexpensive toluene as a starting material with a gas containing oxygen in the vapor phase in the presence of a c...
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JPS5721334A |
PURPOSE: To obtain the titled compound useful as a raw material for dye, etc. by common reaction operations in high conversion directly, by reacting phthalic anhydride or phthalic anhyride with benzene using a catalyst consisting of sili...
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JPS5718641A |
PURPOSE: To prepare hydroquinone or a quinone derivative useful as a medicine or its intermediate, by reacting a hydroquinone derivative with a halogenoprenyl derivative, and subjecting the reaction product to reductive elimination react...
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JPS574929A |
PURPOSE: To prepare the titled compounds (some of which are novel) from a hydroquinone derivative or a quinone derivative, etc., by chemically modifying the double bond of the terminal prenyl group selectively, introducing a functional g...
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JPS574939A |
There is provided a novel method of synthesizing certain tetracyclic quinones. In particular, there is provided a novel route to the synthesis of (+)-7-deoxydaunomycinone and analogs thereof, which includes the provision of novel tri- an...
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JPS574937A |
A procedure for the preparation of new tetracyclic quinones of the formula: ** (Formula) ** where R7 is lower alkyl of 1 to 5 carbon atoms or hydrogen; R9 is R1, R1O is hydrogen where, when R7 is lower alkyl, R9 is hydrogen and when R9 i...
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JPS5653529B2 |
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JPS5652889B2 |
1433299 Preparation of p-benzoquinone GOODYEAR TIRE & RUBBER CO 6 Sept 1974 [28 Sept 1973] 39011/74 Heading C2C 1. A process for the preparation of p-benzoquinone comprising reacting a solution of phenol in a solvent with free oxygen at ...
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JPS5652005B2 |
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