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JPH0971887A |
To develop a production method of vitamin K3 (menadione) by electrolytic oxidation in high yield without requiring a complicated process. 1-methoxy-2-methylnaphthalene is electrolyzed in a methylalcohol solvent by using an alkali metal h...
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JP2588695B2 |
PURPOSE: To easily obtain the subject compound in high reaction rate and high selectivity without forming any byproduct by oxidizing an (alkyl)aromatic compound with a new solid cerium (IV) compound as oxidant. CONSTITUTION: This compoun...
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JP2575058B2 |
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JP2571279B2 |
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JPH08176060A |
PURPOSE: To provide a new anthraquinone derivative exhibiting excellent electron transfer property and useful as an electron transfer material for producing a laminated photosensitive material acting by positive charge and usable in elec...
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JPH08176059A |
PURPOSE: To produce a quinone compound useful as a polymerization inhibitor, an unsaturated polyester stabilizer, intermediate for pharmaceuticals and agrochemicals, etc., in an easily separable state without causing a side reaction by o...
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JP2509206B2 |
A solid product of the formula Ce(CH3SO3)20.2H2O, Ce(CH3SO3)2(OH)2.H2O or other hydrates is disclosed and used as a highly effective oxidant to produce carbonyl containing products from aromatic and alkyl aromatic compounds.
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JPH08119898A |
PURPOSE: To easily produce a bromoazulenequinone compound useful for pharmaceuticals such as anti-inflammatory agent and antitumor agent, electrophotographic receptors, liquid crystal elements, etc., in high purity at a low cost by react...
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JPH0892151A |
PURPOSE: To regioselectively and efficiently obtain the compound, concerned in electron transport, etc., in living bodies, having diverse physiological activities and useful as medicines, etc., without requiring the protection of carbony...
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JPH0832653B2 |
A process for the preparation of high-purity tetrachloro-1,4-benzoquinone by the action of hydrogen peroxide and hydrochloric acid on hydroquinone, which comprises causing 3.8 top 4.2 times the molar quantity of 30 to 37% hydrochloric ac...
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JPH0832654B2 |
Highly pure tetrachloro-1,4-benzoquinone is prepared by the action of chlorine and hydrochloric acid on hydroquinone, characterised in that the 1.9- to 2.1-fold molar amount of gaseous chlorine is allowed to act, at temperatures from 5 t...
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JPH0832655B2 |
A method for producing a compound of the formula: [wherein R<1> and R<2> each stand for a lower alkyl group; n denotes an integer of 0 to 21; X stands for hydrogen atom or an optionally protected hydroxyl group; and Y stands for an optio...
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JPH0867648A |
PURPOSE: To obtain a ketone in a high yield, by oxidizing an olefin-based compound using p-benzoquinone in the presence of water and a palladium compound. CONSTITUTION: An olefin-based compound (e.g. cyclohexene) is oxidized by using a h...
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JPH0859600A |
PURPOSE: To obtain sodium or ammonium salt of 1,4-naphthoquinone- or 1,4- naphthohydroquinone-2-sulfonic acid in the form convenient for storage or transport. CONSTITUTION: This compound is crystallized 1,4-naphthoquinone- or 1,4- naphth...
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JPH0859540A |
PURPOSE: To obtain a fine particulate anthraquinone having ≤2.5μm particle diameter suitable for a suppressant for production of sulides in an aqueous system containing sulfate reducing bacteria present therein from an aqueous solutio...
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JPH0819033B2 |
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JPH0819034B2 |
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JPH08501806A |
PCT No. PCT/KR94/00091 Sec. 371 Date Mar. 14, 1995 Sec. 102(e) Date Mar. 14, 1995 PCT Filed Jul. 13, 1994 PCT Pub. No. WO95/02572 PCT Pub. Date Jan. 26, 19955,8-dihydroxynaphthoquinone derivatives represented by the following general for...
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JPH0816076B2 |
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JPH08997A |
PURPOSE: To obtain an easily available low-cost catalyst system easy to handle, capable of attaining the a desired selectivity in the oxidation of an aromatic compound, capable of storage and having high activity by using a compound havi...
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JPH07114909B2 |
PURPOSE:To reduce a cost of equipment as compared with a case where each dust removal unit has a separate circulating pipe and air blower, by causing the circulating pipes for a plurality of the dust removal units to join a collecting pi...
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JPH07108877B2 |
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JPH07103056B2 |
There is disclosed a biphenyl derivative of the formula (B): wherein R<1>, R<3>, R<4>, R<5> and R are as defined or its salt, a nerve cell degeneration repairing or protecting agent containing a phenyl derivatives selected from compounds...
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JPH0798773B2 |
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JPH0796521B2 |
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JPH07251078A |
PURPOSE: To produce an effective catalyst for oxidation of aromatic compds., which attains the objective selectivity, is easily available, simply handled and can be stored. CONSTITUTION: The compds. of formula I: R1aRebOc (I) [where (a) ...
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JPH0784404B2 |
OXIDATION OF ORGANIC COMPOUNDS USING A CATALYZED CERIUM(IV) COMPOSITION A process for oxidizing aromatic and alkyl substituted aromatic compounds to quinonoid compounds by contacting an aromatic and alkyl aromatic compound with an acidic...
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JPH07228547A |
PURPOSE: To inexpensively obtain the subject compound useful as an intermediate, etc., for medicines, agrochemicals and optical materials, etc., while repeatedly using a fuming sulfuric acid solvent in high purity and yield by reacting a...
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JPH07223992A |
PURPOSE: To obtain in high yield a compound, which is useful as a synthetic intermediate of a therapeutic agent for infantile prothrombinemia and hemostatic vitamin by oxidizing a specific naphthoquinone with a specific compound without ...
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JPH0776192B2 |
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JPH07215907A |
PURPOSE: To provide a method for producing 2,3-dimethoxy-6-chloronaphthazarin which is an active ingredient for antitumor agent. CONSTITUTION: 2,3,6-Trichloronaphthazarin and sodium methylate are heated under reflux in the presence of me...
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JPH07215906A |
PURPOSE: To provide a method for producing 2,3,6-trichloronaphthazarin which is an active ingredient for antitumor agents. CONSTITUTION: 2,3-Dichloromaleic anhydride is condensed with 2-chloro-1-4- hydroquinone under heating in the prese...
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JPH07215908A |
PURPOSE: To provide a method for producing 2,3,6-trimethoxynaphthazarin which is an active ingredient for antitumor agents. CONSTITUTION: 2,3,6-Trichloronaphthazarin and sodium methylate are heated under reflux in the presence of methano...
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JPH0772155B2 |
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JPH07196574A |
PURPOSE: To obtain benzoquinones of high purity in high yield by oxidizing a phenol with the use of a specific oxidizing agent such as oxygen in the presence of a specific oxygen-transferring catalyst. CONSTITUTION: In the presence of a ...
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JPH0753684B2 |
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JPH0745428B2 |
Compounds of the formula: wherein l is an integer of 0 to 18, X is hydrogen, an alkyl having 1 to 4 carbon atoms or a carboxylic acyl having 2 to 4 carbon atoms and Y is a phenylene, a cycloalkylene having 3 to 7 carbon atoms or a group ...
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JPH07504170A |
Ion pairs of hypericin and its analogues and derivatives are prepared by acidifying hypericin to its free acid form and reacting with a predetermined quantity of an organic or inorganic base at a pH below about 11.5. The compounds are us...
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JPH0742244B2 |
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JPH07118195A |
PURPOSE: To provide 2-ethylanthraquinone little in affections against coexisting chemical agents or devices and materials used therefor and substantially not containing a chlorinated compound. CONSTITUTION: 2-Ethylanthraquinon having a c...
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JPH0735392B2 |
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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JPH0733347B2 |
A novel process for the manufacture of quinone derivatives which are suitable as intermediates for the manufacture of (2RS,4'R,8'R)-tocopherol is described. In this process a quinone of the formula I is reacted with a phytyl derivative o...
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JPH0729974B2 |
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JPH07502724A |
PCT No. PCT/EP92/01793 Sec. 371 Date Mar. 18, 1994 Sec. 102(e) Date Mar. 18, 1994 PCT Filed Aug. 6, 1992 PCT Pub. No. WO93/02711 PCT Pub. Date Feb. 18, 1993.The present invention provides the use of a persistent pi -system free radical f...
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JPH0769968A |
PURPOSE: To produce quinones such as parabenzoquinone in one process from phenols. CONSTITUTION: Phenols such as phenol are subjected to oxidation reaction using an oxidizing agent such as oxygen in the presence of a heteropolyacid as a ...
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JPH0748309A |
PURPOSE: To provide a method for producing 2-methylnaphthoquinone, capable of effectively reusing a waste liquid discharged after producing 2- methylnaphtoquinone. CONSTITUTION: In producing 2-methylnaphthoquinone by oxidation of 2- meth...
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JPH0741453A |
PURPOSE: To obtain a quinone useful as an active oxygen remover, antiasthmatic agent, hepatic failure treating agent, etc., in a high purity and yield on an industrial scale by oxidizing a specific derivative of 4-alkoxyphenol having exc...
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JPH0710800A |
PURPOSE: To obtain the subject compound useful as an intermediate for producing antiasthmatic agent, a therapeutic agent for liver diseases, etc., in high yield in excellent acquirement of raw materials, corrosion resistance and maintena...
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JPH0710804A |
PURPOSE: To produce the subject compound in high hyield industrially by subjecting 2-methyl-1,4-naphthoquinone and 6-methyl-1,4-naphthoquinone and a conjugated diene to Diels-Alder reaction, acetylating the resulting substance under a re...
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JPH07580B2 |
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