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JPH0529380B2 |
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JPH0529384B2 |
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JPH0529341B2 |
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JPH0522690B2 |
A catalyst for use in vapor phase oxidation of naphthalene into 1,4-naphthoquinone is dislosed. The catalyst which is supported on an inert carrier material is represented by the formula: (V)a(K)b(S)c(Fe)d(Sn)e(X)f(O)g where V, K, S, Fe,...
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JPH0520420B2 |
Psoriasis in mammals is relieved by topically administering naphthalenes of the formula:wherein:R1 and R are lower alkoxy or lower alkylthio;R3 is hydrogen, lower alkyl, lower alkoxy, optionally substituted phenyl, optionally substituted...
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JPH0558941A |
PURPOSE: To obtain naphthacenequinones useful for the chemical storage of information as photochromic systems for contrast formation, light absorption or information recording. CONSTITUTION: The naphthacenequinones are compds. of formula...
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JPH0514698B2 |
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JPH0514699B2 |
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JPH0514697B2 |
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JPH0512281B2 |
A process is provided to remove inert contaminants from a working compound employed for the manufacture of hydrogen peroxide by the reduction and oxidation of a solution of alkylated anthraquinones and derivatives. The contaminants are r...
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JPH058179B2 |
A new process for the preparation of 6-deoxyanthracyclinones of general formula I: I wherein R represents a hydrogen atom, a hydroxy group or a lower alkoxy group is described. The process provides a total synthesis of the 6-deoxyanthrac...
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JPH056533B2 |
A quinone derivative of the formula (I): in which A is a group of the formula (IV): or a group of the formula (V): in which X and Y are either the same as or different from each other and each are hydroxy, methoxy or hydrogen; and n is a...
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JPH053864B2 |
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JPH051250B2 |
1,4-Naphthoquinones of formula (I), methods for their preparation, pharmaceutical and veterinary formulations thereof and the use thereof in human and animal therapy are disclosed.Particularly preferred compounds of formula (I) are 2-(4'...
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JPH0480011B2 |
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JPH04300848A |
PURPOSE: To provide a novel benzoquinone compd. important for producing a triphenodioxazine deriv. and more particularly an asymmetric triphenodioxazine deriv. useable as a dye chromophore. CONSTITUTION: The benzoquinone compd. of formul...
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JPH0466465B2 |
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JPH04297434A |
PURPOSE: To obtain an anthraquinone compd. useful for production of dyes, paper pulp or hydrogen peroxide from phthalic anhydride and a benzene deriva tive without the need for executing sepn. and recovery of an intermediate prod uct whi...
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JPH0463869B2 |
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JPH0460098B2 |
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JPH0456811B2 |
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JPH0455184B2 |
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JPH0455182B2 |
PURPOSE:To obtain advantageously the aimed compound, by reacting an organic compound with a ceric salt in the presence of a water-immiscible organic solvent and tetralin in an aqueous solution of an acid in the reaction system to prepare...
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JPH0455183B2 |
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JPH0454656B2 |
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JPH0451536B2 |
2,3,5-trimethyl-benzoquinone is produced by oxidizing 2,3,6-trimethyl-phenol in the presence of a catalyst of cupric chloride and lithium chloride in a solvent mixture of an aromatic hydrocarbon and a lower aliphatic alcohol having 1 to ...
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JPH04224538A |
PURPOSE: To provide the preparation process of an alkyltetrahydroanthrahydroquinone-containing solution, that of alkyltetrahydroanthrahydroquinone or alkyltetrahydroantraquinone and that of hydrogen peroxide. CONSTITUTION: Alkylanthraqui...
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JPH04221337A |
PURPOSE: To produce an anthraquinone compound from a para-substituted benzene and phthalic anhydride as raw materials. CONSTITUTION: 1,4-Dimethylanthraquinone is produced from para xylene and phthalic anhydride in the presence of a heter...
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JPH0449531B2 |
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JPH0449532B2 |
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JPH04218688A |
PURPOSE:To industrially produce a quinone derivative by placing a tetraalkoxytoluene derivative in the anode chamber of an electrolytic cell and electrolytically oxidizing the derivative in the two phases consisting of acetonitrile and b...
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JPH0448785B2 |
The invention is for a process for removing unalkylated anthraquinones from alkylated anthraquinone by forming a solution thereof, reducing the solution sufficiently so that at least part of the unalkylated anthraquinone is in the reduce...
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JPH0447655B2 |
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JPH04210958A |
PURPOSE: To obtain new naphthacenequinones used for contrast formation or light absorption for reversible photochromic systems. CONSTITUTION: A compound of formula I or II [R is 6-14C aryl which may have substituents (alkyl, alkoxy, alky...
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JPH0446939B2 |
Vitamin K3 (I; 2-methylnaphtho-1,4-quinone), vitamin K4 (IIa; 2-methyl-1,4-dihydroxynaphthalene) and vitamin K4 diacetate (IIb) are prepared by reacting 1-acetoxy-buta-1,3-diene (IV) with methylbenzoquinone (V) to give the novel compound...
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JPH0446940B2 |
1-Amino-2-phenoxy-4-hydroxyanthraquinones, which are useful as a red disperse dye for polyester fibers, and also useful as an intermediate for the production of other red disperse dyes, are produced in a high yield and purity by reacting...
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JPH04178341A |
PURPOSE: To produce the title substance with hardly forming any by-products by bringing an aromatic compound providing the title compound by oxidation into contact with an H2-containing gas and an O2-containing gas in the presence of a p...
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JPH0437816B2 |
A process for purifying crude monochloro- or monobromoanthraquinone is described. In this process, monochloro- or monobromoanthraquinone which contains by-products as impurities is mixed with a hot non-polar aliphatic solvent in such a r...
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JPH0435448B2 |
New benzo-1,4-quinones and salts thereof with organic or inorganic acid and bases have the formula I (I) wherein p is 1 or 2 and q is 0 or 1, provided that p+q is 1 or 2, R is a residue of formula II (II) wherein Q is selected from the r...
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JPH0428248B2 |
There is described a novel process for the manufacture of hydroquinone derivatives of the formula II wherein R represents an ether protecting group, and their conversion into d- alpha -tocopherol starting from compounds of the formula I ...
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JPH0419974B2 |
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JPH0417172B2 |
PURPOSE:A reaction mixture resulting from the oxidation of 2-methyl-naphthalene is treated with a specific solvent and an aqueous bisulfite solution to separate the titled compound with which can be used as a vitamin K3 in high yield and...
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JPH0415214B2 |
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JPH04501414A |
4-substituted anthracyclinones of formula (I): wherein R represents a straight or branched alkyl, alkenyl or alkynyl group of up to 16 carbon atoms optionally substituted by (a) an aryl group which is unsubstituted or substituted by an i...
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JPH0412246B2 |
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 sulfuric acid solution or a cerous sulfate-cont...
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JPH0469353A |
PURPOSE: To efficiently obtain the subject compound which is an intermediate for pigments, germicides, etc., and chloranil electrodes, additives for lubricating oils, etc., in high purity with good operating efficiency by reacting p-amin...
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JPH049580B2 |
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JPH049578B2 |
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JPH047335B2 |
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JPH042579B2 |
1. Process for manufacturing 2-amylanthraquinone having a high content of the tert-isomer, by reaction of phthalic anhydride with tert-amylbenzene in the presence of a catalyst consisting of a mixture of hydrofluoric acid and boron trifl...
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