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JPH066539B2 |
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JPH066544B2 |
4-oxa-aldehydes are prepared by catalytic isomerization of a 1,3-dioxane using an acidic zeolite catalyst.
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JPH0616602A |
PURPOSE: To produce a quaternary ammonium carbonate ester which is useful as a bleaching precursor in detergent compositions without accompanying generation of hydrogen chloride byproducts. CONSTITUTION: A hydroxyl compound of formula I ...
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JPH0616574A |
PURPOSE: To efficiently obtain the subject compd. in high yield which is useful as an antioxidant, lubricant, hydraulic fluid or the like by reacting each a specified, carboxylic acid ester and an alcohol in the presence of a specified c...
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JPH064543B2 |
A 1,3-diketone (1 mol) of formula: wherein R<1> and R<2> each is C1-8 alkyl, haloalkyl, hydroxyalkyl, trifluoromethyl, optionally substituted phenyl-substituted C1-7 alkyl, alkoxycarbonyl-substituted C1-7 alkyl, C1-7 aminoalkyl, a C1-7 a...
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JPH064544B2 |
A carbonyl compound represented by the formula: wherein A represents C1-7 alkyl or haloalkyl, optionally substituted phenyl, or optionally substituted benzyl; and B represents C1-4 acyl, C1-7 alkoxycarbonyl, haloalkyl, hydroxycarbonyl, C...
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JPH064556B2 |
1. A process for the preparation of cyclohexanedione derivatives of the general formula see diagramm : EP0124041,P7,F1 where R**1 means one of the following substituents : C2 -C8 -alkyl, C2 -C8 -alkenyl, C3 -C12 -cycloalkyl, C5 -C12 -cyc...
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JPH06742B2 |
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JPH0588208B2 |
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JPH0584292B2 |
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JPH0583525B2 |
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JPH0582372B2 |
There is provided a novel process for the preparation of carboxylic acids from alkyl groups under basic conditions utilizing oxides of copper, cobalt and silver.
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JPH0582371B2 |
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JPH05294864A |
PURPOSE: To obtain a new fullerene derivative useful as a cross-linking agent and/or a nucleous constituent of star polymers. CONSTITUTION: This compd. is a polysubstd. fullerene component having more than one substd. groups selected fro...
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JPH0580457B2 |
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JPH0580264B2 |
Transition metal-bis-phosphite catalyzed carbonylation processes, especially hydroformylation, as well as transition metal-bis-phosphite compositions, bis-phosphite ligands and transition metal-bis-phosphite catalysts.
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JPH0579052B2 |
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JPH0576952B2 |
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JPH0576452B2 |
1. A process for the preparation of an unsaturated ketone (vinyl ketone) of the general formula (I) R-CH=CH-CO-CH3 where R is any unsubstituted or substituted aromatic or heterocyclic radical, wherein an appropriate phosphorylid (II) see...
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JPH05271104A |
PURPOSE: To provide a system having gentle reaction conditions allowing the use of particularly optically active and vital molecules for saponification of an acid deriv., ammonolysis or ester conversion and sepn. of polymer bond molecule...
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JPH0572894B2 |
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JPH05255165A |
PURPOSE: To produce an α,α-difluoroether useful for synthesizing medicines, agricultural chemicals, functional materials, etc., in good yield under mild conditions in a short process. CONSTITUTION: A thionecarboxylic acid ester express...
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JPH05246897A |
PURPOSE: To produce a biphenyl-based and/or a benzophenone-based compound by using an aromatic carboxylic acid halide as a raw material. CONSTITUTION: An aromatic carboxylic acid halide expressed by the formula Ar(COX)n [Ar is aromatic g...
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JPH0566934B2 |
Ketones are prepared by isomerization of aldehydes at elevated temperatures over zeolites.
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JPH05221879A |
PURPOSE: To prepare an org. monomeric or polymeric compd. having tert- butyloycarbonyl groups. CONSTITUTION: An org. compd. having at least one heteroatom with an acidic proton is allowed to react with di-tert-butyl dicarbonate at 0-80°...
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JPH0557248B2 |
Process for inverting the configuration of secondary alcohols in which the hydroxyl group is attached to an asymmetric carbon atom, in accordance with which the secondary alcohols are esterified, with inversion of their configuration, by...
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JPH0557246B2 |
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JPH0553794B2 |
Camphor derivatives characterised by having general formula I or its enantiomeric structure wherein R represents a hydrogen or halogen atom, a pseudohalogen group, a hydroxy group or an optionally substituted alkyl, alkoxy, aryloxy, amin...
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JPH05194334A |
PURPOSE: To obtain a carboxylate useful as a surfactant by allowing a specified primary hydroxyl group-contg. compd. to react with an inorg. or org. halo-contg. oxidizing agent in the presence of a base and hindered nitroxide. CONSTITUTI...
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JPH0550556B2 |
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JPH05186398A |
PURPOSE: To obtain the subject new compound, capable of efficiently introducing new carboxyl group into a compound to be acylated under mild conditions and useful as an acylating agent for various alcoholic hydroxyl groups or thiol group...
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JPH0548210B2 |
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JPH0547526B2 |
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JPH0546252B2 |
An alcohol compound is produced by reducing a carboxylic acid or an ester thereof with an alcohol in the presence of a solid catalyst. The catalyst includes a hydrous metal oxide belonging to Group IV of the Periodic Table.
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JPH05170670A |
PURPOSE: To provide a new oxidation method of a carbohydrate by using an inexpensive and advantageous reagent. CONSTITUTION: The preparation method of an oxyacid from a carohydrate by using an oxygen-contg. gas in an alkaline medium by m...
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JPH0544951B2 |
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JPH0533935B2 |
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JPH0533934B2 |
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JPH0533933B2 |
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JPH0531534B2 |
Alpha-aryl-alkanoic acids are prepared by heating at boiling temperature a mixture of an alpha-halogen-alkyl-arylketone in a saturated aliphatic diol or in a mixture of saturated aliphatic diols in the presence of a Broensted's acid and ...
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JPH0528214B2 |
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JPH0528228B2 |
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JPH0597730A |
PURPOSE: To minimize the pulverization and disintegration of catalyst for the synthesis of methacrolein and methacrylic acid in the charging of the catalyst into a reactor by using a reactor containing string-shaped materials having a sh...
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JPH0524924B2 |
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JPH05501563A |
PCT No. PCT/GB90/01763 Sec. 371 Date May 14, 1992 Sec. 102(e) Date May 14, 1992 PCT Filed Nov. 15, 1990 PCT Pub. No. WO91/07385 PCT Pub. Date May 30, 1991.Compounds of formula I (I) in which Ar is aryl and R1 and R2 are alkyl, are obtain...
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JPH0519532B2 |
A process for the preparation of a vicinal hydrosoluble diol by means of a direct catalytic hydroxylation of the corresponding olefine with H202. The process is characterized in that an olefine, optionally substituted with one or more fu...
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JPH0519533B2 |
Carboxylic acids having the general formula:wherein R is selected from aryl, aralkyl, aralkenyl, aralkynyl, heteroaryl, heteroarylalkyl, heteroarylalkenyl, heteroarylalkynyl, alkyl, alkenyl and alkynyl groups, optionally substituted by s...
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JPH0517232B2 |
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JPH0516414B2 |
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JPH0525155A |
PURPOSE: To obtain the subject compound useful as a synthetic intermediate for pharmaceuticals and agricultural chemicals under nearly neutral and mild condition in high efficiency by reacting a carboxylic acid with a haloiminium salt as...
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