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JP2696933B2 |
The present invention relates to substituted cyclopentanone and cyclohexanone derivatives and substituted cyclopentenone and cyclohexenone derivatives, which are useful as intermediates for pharmaceutical products and agricultural chemic...
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JPH09316054A |
To provide a method for producing the subject compound by catalytic hydrogenation of 2,2,6,6-tetramethyl-4-piperidone and enabling circulating reuse of the hydrocarbon solvent used in the reaction without affecting the quality of the fin...
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JPH09316065A |
To easily obtain the subject compound useful as a raw material for new antibiotics in a high purity and in a high yield by treating pentitol with an acid and subsequently subjecting the treated product to a dehydrative cyclization reacti...
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JP2688049B2 |
To obtain an intermediate for a proline derivative useful for production of an ACE inhibitor. This intermediate is shown by formula I [R is H, t-butyl or the like; R1 and R5 are each H, methyl, ethyl or the like; pairs of R1 and R2, R2 a...
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JP2683622B2 |
4-Hydroxy-2,2,6,6-tetramethylpiperidine (HTMP) is prepared by hydrogenation of triacetonamine (TAA) in the presence of an Ni, Co, Ru, Rh, Os or Ir hydrogenation catalyst. The process is carried out in the melt without a solvent.
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JPH09511743A |
The present invention is drawn to a process for forming an amide bond linkage comprising reacting a carboxylic acid and an amine in a two-phase mixture of water and an organic solvent selected from an oxygenated organic solvent or an aro...
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JPH09301904A |
To obtain dimethylcyclooctane dimethanol useful as a material or additive for synthetic resins as polyester, polyurethane and nylon, synthetic fibers, lubricants, plasticizers. This dimethylcyclooctane dimethanol of formula I (one of R1 ...
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JPH09295975A |
To obtain a phthalide compound useful as an intermediate for synthesizing dyes, medicines or agrochemicals, in high selectivity, by catalyzing an aromatic orthodicarboxylic acid anhydride in a specific solvent in the presence of a nickel...
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JP2675992B2 |
To obtain an optically uniform intermediate for synthesizing octahydroindole-2-carboxylic acid having an activity such as inhibition of an angiotensin converting enzyme so as to avoid racemate resolution. A compound of formula I [(n) is ...
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JP2667696B2 |
A process for producing neopentyl glycol is disclosed which comprises reacting isobutyraldehyde and formaldehyde in the presence of a trialkylamine catalyst to form a condensation reaction product comprising hydroxypivaldehyde, followed ...
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JP2664450B2 |
In the process according to the invention 2-thiophene acetonitrile is reacted with 2-chlorobenzylamine and hydrogen in the presence of a hydrogenation catalyst. The product obtained is a chemical intermediate useful in the pharmaceutical...
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JPH09268146A |
To simply and efficiently obtain an optically active fluorine containing hydroxy compound which is useful as an intermediate for medicines and the like in high yield of asymmetric reduction by hydrogenating a readily available fluorine-c...
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JP2659040B2 |
Aliphatic polyamines are formed selectively from aliphatic polynitriles having 2 to 3 atoms between cyano groups by reacting the aliphatic polynitrile with hydrogen in the presence of a primary or secondary amine in a fixed bed reactor i...
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JPH09255655A |
To provide a method for producing an aminomethylpyridine containing a halogen atom at the α-position under industrially advantageous conditions of normal pressure or pressure around the normal pressure in high yield and high selectivity...
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JPH09249613A |
To obtain an alicyclic dicarboxylic acid diester having a new norbornane skeleton, useful as an intermediate raw material for polyester resins, etc., used for base, etc., of photographic film and having a new norbornane skeleton by using...
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JP2652004B2 |
Catalytic (catalyst) composition of the Raney type for hydrogenation. This catalyst may originate from an Ni/Al/Mo alloy in which the Al/Mo weight ratio is higher than or equal to 1, preferably 2 and, still more preferably, is between 2 ...
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JPH09227483A |
To obtain a halogenated aromatic amine useful for producing medicines, photographic chemicals, etc., in high purity in a high yield at a low cost in a state little in the ratio of dehalogenated products by catalystically hydrogenating th...
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JP2646907B2 |
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JP2643375B2 |
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JP2639496B2 |
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JPH09208544A |
To produce a high quality acrylamide most suitable for a raw material for a polymer having a high molecular weight and good water-solubility by adding a specified additive and performing a specific treating in the hydration reaction of a...
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JPH09188637A |
To produce 3-bromo-2-(substituted phenyl)-1-propene useful as a synthetic intermediate for a pharmaceutical or agrochemical at high seleetivity and yield by using 2-phenyl-1,2,3-tribromopropane as a raw material. This 3-bromo-2-(substitu...
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JPH09188640A |
To produce an m-substituted styrene useful as an intermediate for a medicine or an agrochemical in high yield by a simple process consisting only of dehydrohalogenation of an m-substituted-α halostyrene. This m-substituted styrene of fo...
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JPH09176121A |
To produce a compound useful as a synthetic raw material for pharmaceuticals, agrochemicals, etc., by using an easily handleable raw material easily available on an industrial scale. A chloro-(aminomethyl)pyridine compound of the formula...
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JPH09157231A |
To obtain 2-aminobenzyl alcohol in high yield at a low cost from 2-nitrobenzaldehyde easily available in the market while suppressing the formation of by-products by reducing the aldehyde with hydrogen. A 2-nitrobenzaldehyde compound is ...
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JPH09151168A |
To produce a β-alanine salt useful as a raw material for producing a medicine, an agrochemical and a cosmetic in high yield by suppressing the formation of by-products. The oxidative dehydrogenation reaction of 3-aminopropanol is carrie...
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JP2617214B2 |
PURPOSE:To obtain odorless isoparaffin solvents having low ultraviolet absorption and a light lubricating oil by subjecting a B-B fraction to oligomerization in the presence of a catalyst, primarily hydrogenating and desulfurizing a poly...
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JP2614079B2 |
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JPH09132536A |
To commerically and inexpensively hydrogenate an organic compound having any one or two or more kinds of unsaturated bonds in an aldehyde, a ketone, an aliphatic unsaturated double bond and an aromatic unsaturated double bond and not con...
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JP2608714B2 |
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JPH09124562A |
To easily produce the subject compound in a high yield by hydrogenating an aromatic nitro compound in the presence of a specific highly safe catalyst having a long life. (B) An aromatic nitro compound such as nitrobenzene, o-, m- or p-ni...
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JP2602616B2 |
PURPOSE: To remove a catalyst efficiently, economically and for long period from a catalytic reaction product by passing the catalytic reaction product containing the solid catalyst through a hollow tubular filter medium which has a tape...
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JPH09100260A |
To obtain a 4,4'-di(N-alkylaniline) which is important as an curing agent for epoxy resins with industrial advantage in high yield, in high purity under mild reaction conditions by reductive alkylation of a 4,4'-dianiline with an aldehyd...
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JP2598848B2 |
The invention relates to bis(3-cyano-3,5,5-trimethylcyclohexylidene)-azine (=IPN-azine), a method of its preparation by reacting 1,3,3-trimethyl-5-oxocyclohexane carbonitrile (=IPN) with a source for hydrazine in a molar ratio of essenti...
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JP2599570B2 |
PURPOSE: To efficiently prepare a carboxylic acid salt. CONSTITUTION: A process for preparation of a carboxylic acid salt which comprises bringing an aqueous solution of a primary alcohol into contact with an alkali metal hydroxide in th...
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JP2593550B2 |
Process for preparing 2-alkyl-1,4-butanediols and mixtures with 1,4-butanediol which comprises bringing together, at an initial alkaline pH, and at a temperature and pressure suitable for reaction, a mixture of 4-hydroxybutyraldehyde and...
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JP2593552B2 |
Process for preparing 2-alkyl-1,4-butanediols and mixtures with 1,4-butanediol which comprises bringing together, at an initial alkaline pH, and at a temperature and pressure suitable for reaction, 2,3-dihydrofuran, hydrogen, an unsubsti...
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JPH0977758A |
To produce a tetrahydrofuran derivative useful as an intermediate for pharmaceuticals from easily available raw materials on an industrial scale at a low cost without using highly toxic expensive reagents by reductively cyclizing a speci...
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JPH0966236A |
To produce a corresponding methylamino compd. by reacting an aromatic cyano compd. and hydrogen under a mild pressure condition to hydrogenate an aromatic ring together with a cyano group and to provide a hydrogenating catalyst used in t...
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JPH0967319A |
To produce a high yield, simply and in a short time an alkyl aniline useful for an antioxidant, an active component of color photo-developing agent and synthetic intermediate for many compounds by carrying out a reaction of a nitrobenzen...
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JPH0959212A |
To obtain an unsaturated carboxylic acid (ester) causing little environmental pollution. This unsaturated carboxylic acid (ester) is obtained by the three steps composed of amidation step: (meth)acrylonitrile is catalytically hydrated in...
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JP2585737B2 |
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JPH0942780A |
To lower a heat recovery temperature and raise a heat utilization characteristic in terms of the cost of a device and an operating cost or the like by recovering heat in accordance with a reaction represented by a specific expression and...
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JP2580736B2 |
Optically active hydroxybenzylamine derivatives of the Formula: wherein R<1> denotes a hydrogen atom, lower alkyl group or lower alkoxy group; R<2> denotes a lower alkyl group; * signifies an asymmetric carbon atom; and the hydroxyl grou...
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JP2577454B2 |
New 2-methyl-4-fluoro-phenols and process for their preparation from 2-methyl-4-fluoro-phenol.
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JP2574667B2 |
PURPOSE: To obtain a compound economically excellent, obtainable in a simple method and in high yield and useful as a producing raw material of a medicine and expressed by a specific formula. CONSTITUTION: This compound is expressed by f...
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JP2574402B2 |
3-Aminophenyl 2-hydroxyethyl sulphone (I) can be prepared in a high yield and purity by treating 2-chloro-5-nitrophenyl 2-hydroxyethyl sulphone (II) or 4-chloro-3-nitrophenyl 2-hydroxyethyl sulphone (III) with hydrogen in the presence of...
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JPH0920736A |
PURPOSE: To provide a method for poducing L,L-propanediaminedisuccinic acids (EDDS), excellent in biodegradability in an easy process having good reproducibility in high yield and purity. CONSTITUTION: This method for producing an alkali...
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JPH0912516A |
PURPOSE: To obtain the subject compound useful as a raw material for a quaternary ammonium salt suitable as a softener for hair, etc., by reacting an amino- alcohol with formaldehyde or paraformaldehyde and hydrogen cyanide and then hydr...
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JPH08333308A |
PURPOSE: To obtain an N,N'-bis(3-aminopropyl)diaminoalkane useful as an intermediate for pharmaceuticals or agrochemicals containing little amount of by- products, easy to be purified in high selectivity and high yield by a catalytic hyd...
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