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Matches 901 - 950 out of 2,174

Document Document Title
JPH04503803A  
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...  
JPH0437816B2  
JPH0435448B2  
JPH04164092A
NEW MATERIAL:A compound expressed by formula I (R and X are H or hydroxyl-protecting group). EXAMPLE: A compound expressed by formula II. USE: A carcinostatic agent. PREPARATION: γ-Rhodomycinone is treated with trifluoroacetic anhydride...  
JPH04154737A
PURPOSE: To provide a pharmaceutical composition containing a biphenyl derivative or a phenyl derivative as an active component and having an action to promote the survival and growth of cholinergic nerve cell of central nervous system a...  
JPH0428248B2  
JPH04134045A
PURPOSE: To obtain chloranil for intermediate for agricultural chemical, pigment, etc., by reacting readily available hydroquinone, benzoquinone or chlorinated derivative thereof with chlorine using a mixed solvent of water or hydrochlor...  
JPH04112820A
PURPOSE: To obtain a hair-dye enabling fast-dyeing of hair without damaging the hair, free from stimulation and giving excellent feeling in use by using 1,2-hydroxy-1,4-naphthoquinone in combination with an organic compound containing ni...  
JPH0419974B2  
JPH0417172B2  
JPH0415214B2  
JPH04501414A  
JPH0477421A
PURPOSE: To obtain a light-stabilized ubidecarenone-containing composition useful for chronic hypertension, etc., by mixing a coloring matter to ubidecarenone. CONSTITUTION: Ubidecarenone is mixed with a coloring matter. Used coloring ma...  
JPH0412246B2  
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...  
JPH0412115B2  
JPH0449274A
NEW MATERIAL:Naphthaceno[1,12-cd:4,5-c'd']bis[1,2]diselenol of formula I, 1,4,5,12-tetrachloronaphthacene of formula II, 1,4,5,5,12,12-hexachloro-5,12- dihydronaphthacene of formula III and 2,3-dihydro-5,12-dihydroxy-1,4- naphthacenequin...  
JPH0449259A
NEW MATERIAL:A toluquinone compound of formula I or II. USE: A medicine such as cerebral circulation improving agent, antiinflammatory agent, face paint or antifungal agent. Giving vasohypotonic, antiinflammatory, melanization-inhibitory...  
JPH048038B2  
JPH047335B2  
JPH0436260A
NEW MATERIAL:Propene derivatives shown by formula I (R1 is H or methyl, when R1 is H, R2 and R3 are H or 2-methyl-2-propenyl, and when R1 is methyl, R2 and R3 are H or 2-propenyl; R4 is H or OH) and formula II. EXAMPLE: 3,5-Dimethyl-2-(2...  
JPH0436253A
NEW MATERIAL:An optically active compound expressed by formula I [R1 to R3 are H or 1-4C alkyl; R4 and R6 are OH or protected OH, and further R4 is oxo (in said case, benzene ring has benzoquinone structure); R5 and R8 are OH or acyloxy,...  
JPH042579B2  
JPH0380771B2  
JPH0379331B2  
JPH03287557A
PURPOSE: To obtain 1,4-benzoquinone in high purity and yield using industrial easy operation by dropping an aqueous solution of an oxidizing agent into hydroquinone in the presence of a metallic vanadium salt, dilute sulfuric acid and an...  
JPH03275642A
PURPOSE: To efficiently obtain the title compound in high purity by adding a diene compound to a product formed by oxidation of a 2-substituted naphtha lene followed by heating and by separating and removing the resulting 6 substitu tion...  
JPH03258745A
PURPOSE: To efficiently and economically obtain high-quality chloranil while improving solubility of product in reacting hydroquinone with a chlorine gas in a reaction solvent, by using an acetic acid-water mixed solvent or an acetic aci...  
JPH0372604B2  
JPH0372052B2  
JPH03246250A
PURPOSE: To advantageously obtain chlorinated naphthoquinones by chlorinating the subject compounds with a hydrochloric acid solution at a specific concentration and hydrogen peroxide solution using a metal and metal chloride as a cataly...  
JPH03246242A
NEW MATERIAL:An optically active (S)- or (R)-pentane compound expressed by formula I (R1, R2 and R3 are H or 1-4C alkyl; R4 is hydroxy, protected hydroxy or oxo, provided that the benzene ring in the formula becomes the benzoquinone ring...  
JPH0367065B2  
JPH03220155A
PURPOSE: To obtain hypericin, by reacting emodin enthrone as a starting material with an oxygen-transfer reagent in an aromatic tertiary amine solvent in the presence of a redox catalyst and a secondary amine to form protohypericin and s...  
JPH03215481A
NEW MATERIAL:The compound of formula I (R1 to R3 are H or 1-4C alkyl; the steric configuration of the chiral center carbon atom labeled with * is S or R). EXAMPLE: (S)-(-)-6-hydroxy-2,5,7,8-tetramethylchroman-2-ethanol of formula II. USE...  
JPH03209374A
PURPOSE: To obtain a microbicidal and plant growth regulating chemical containing anthracenedione derivatives. CONSTITUTION: A microbicidal and plant growth regulating chemical containing compounds of formula I [A-D are each O, NR1, CR1R...  
JPH03209343A
NEW MATERIAL: A compd. of formula I (X is H, OH; one of R, R1 is H and the other is F; R2 is H, OH, alkoxy). EXAMPLE: 2β-acetyl2α,4α,5,12tetrahydroxy3β-fluoro1,2,3,4tetrahydr o6,11 nephthacenedione. USE: A intermediates for novel ant...  
JPH0357096B2  
JPH03188042A
NEW MATERIAL:A compound expressed by formula I {A is formula II, formula III [R3 to R5 are H, alkyl or alkoxy; X and Y are OH or formula IV (n is 0 or 1; R6 is alkyl)]; R1 is alkyl, cycloalkyl, alkenyl, alkynyl, arylalkyl, (CH2)1-10-CN, ...  
JPH0351697B2  
JPH03176427A
PURPOSE: To obtain the subject compounds in good yields, by reacting an aromatic or heteroaromatic amine with a nitrosyl polyfluoro salt and decomposing the product in situ. CONSTITUTION: A corresponding aromatic or heteroaromatic amine ...  
JPH03176454A
PURPOSE: To obtain a high purity shikonin in high yield by dissolving unpurified shikonin in an organic solvent under heating, absorbing impurities contained in the solution on an inorganic absorbent and separating the solution from the ...  
JPH03503174A  
JPH03163072A
PURPOSE: To obtain the subject compound useful as a raw material of 2- hydroxy-1,4-naphthoquinone with suppressing side reaction and keeping reaction rate in high level by reacting 1,4-naphthoquinone and hydrogen peroxide in a reaction s...  
JPH0344048B2  
JPH03151343A
PURPOSE: To obtain the subject compound with high purity in high yield for a short reaction time, by reacting phthalic anhydride with a phenol derivative in the presence of a Lewis acid catalyst and an optional diluent in an automatic cl...  
JPH0339068B2  
JPH03137164A
NEW MATERIAL:The compound of formula I {R is H, 1-7C (alkoxy-substituted) alkyl, 1-7C (alkoxy-substituted) alkoxy, 1-7C alkylthio, 1-7C alkyl-substituted phenyl, benzyl, phenoxy, phenylthio, benzyloxy, halogen or -N(R1)R2 [R1 and R2 are ...  
JPH0337532B2  

Matches 901 - 950 out of 2,174