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JP2562421B2 |
PURPOSE: To use, as a working fluid for a heat pump system, a specific fluorinated hydrocarbon which contains no chlorine, is excellent in environmetal protection, and can be prepd. at a high purity and economically in a high yield witho...
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JPH08323206A |
PURPOSE: To produce a Raney catalyst having high activity and high selectivity. CONSTITUTION: A Raney alloy represented by the formula Al-Me-X (wherein Me is one metal selected from a group consisting of Ni, Co, Fe, Cu, Pd and Ag and X i...
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JP2558480B2 |
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JP2558329B2 |
There is disclosed a catalytic hydrogenation process resulting in compounds of the formula wherein the dotted line represents a facultative bond, by hydrogenating the compound of the formula in the presence of a platinum or a nickel cata...
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JPH08301824A |
PURPOSE: To produce high-purity L,L-ethylenediaminedisuccinic acid (EDDS) excellent in biodegradability in high yield in a process good in reproducibility by using an industrially readily available glyoxal and L-aspartic acid as raw mate...
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JP2553049B2 |
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JPH08295644A |
PURPOSE: To inexpensively obtain the subject compound useful as an intermediate for fluorenemethyloxycarbonyl to be used as an amino acid-protecting group by reducing 9-formylfluorene with hydrogen in the presence of a catalyst. CONSTITU...
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JP2550369B2 |
Derivatives of bicyclic aminocarboxylic acids, a process and intermediates for their preparation, and their use. The invention relates to compounds of the formula in which n is 1-3, R denotes acyl and R1 denotes an esterifying group or a...
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JPH08291116A |
PURPOSE: To obtain 4-(4-alkylphenoxy)benzylamine useful as an intermediate for a compound useful as an active component of pharmaceuticals, agrochemicals, etc., especially insecticides and miticides on an industrial scale in high yield a...
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JP2546710B2 |
When making an amide by hydrolysis of a nitrile in an aqueous medium containing a Raney copper or other black copper catalyst, the hydrolysis reaction can be improved if the catalyst has been contacted with an aqueous solution of a water...
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JPH08277238A |
PURPOSE: To efficiently obtain citronellal useful as a perfume, etc., without using an expensive catalyst in industrial scale by hydrogenating citronellal at a low temperature under low pressure using a specific unmodified Raney nickel c...
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JPH08277279A |
PURPOSE: To easily obtain in high yield a benzylthiazolidindione derivative useful as a raw material for medicines and agrochemicals, etc., by hydrogenating a berizylidenethiazolidindione derivative in the presence of a catalyst. CONSTIT...
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JPH08277252A |
PURPOSE: To obtain an amino acid derivative important as a synthetic intermediate for a medicine, a food and various useful compounds from an alkylidenehydantoin by a ready operation efficiently in an extremely high yield. CONSTITUTION: ...
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JPH08269007A |
To provide a method for producing the subject compound in high yield while low in producing byproducts by reacting a formylvalerate ester with ammonia under non-hydrogenating conditions and then hydrogenating the resultant product in the...
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JP2542683B2 |
Benzotrifluorides substituted by fluorine and optionally in addition by chlorine, some of which are new, are prepared by hydrogenating benzotrifluorides which are substituted by fluorine and chlorine, in the presence of a catalyst and a ...
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JP2540319B2 |
Prodn. of amino alcohols of formula (I) is effected by (a) reacting a hydroxy ketone of formula (II) with an amine of formula R3NH2 (III), and (b) reducing the resulting imine (IV): R1 and R2=H or CH2OH; R3=H, 1-4C alkyl or 1-4C hydroxya...
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JP2537528B2 |
A process for preparing 2-(o-aminophenyl)ethanol comprising reducing 2-(o-nitrophenyl)ethanol with hydrogen in the presence of a Raney nickel catalyst is described, in which said reducing is carried out in the presence of a small amount ...
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JP2538208B2 |
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JPH08245572A |
To obtain -caprolactam in a high yield from 5-formylvaleric acid, its ester or amide. The -caprolactam is obtained by the following steps: (a) 5- formylvaleric acid, its ester or amide is contacted with ammonia and water under non-hydrog...
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JPH08245604A |
To integrally epoxidize an olefin in a high epoxidation selectivity at a low cost by using methanol recovered from an epoxidation reactional mixture as a diluent for a concentrated oxidizing agent stream used for the epoxidation. (A1) A ...
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JP2534627B2 |
PURPOSE: To provide a propellant gas which comprises a specific fluorinated hydrocarbon, does not destroy the ozone layer, is noncombustible, and is useful for medical apparatus, heat pump systems, etc. CONSTITUTION: This propellant gas ...
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JP2528444B2 |
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JPH08217756A |
PURPOSE: To simply and inexpensively obtain a benzoxazole important as a synthetic intermediate of sensitizing dyestuff for photographic materials in high purity, in high yield by hydrogenation, acylation and cyclization of 2- nitorophen...
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JP2525530B2 |
The reductive amination of 1,3,3-trimethyl-5-oxocyclohexane- carbonitrile (IPN) with ammonia and hydrogen in the presence of nickel or cobalt Raney catalysts to give 3-aminomethyl-3,5,5,-trimethylcyclo- hexylamine is carried out in one s...
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JP2524690B2 |
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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JP2523753B2 |
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JPH08198804A |
PURPOSE: To easily obtain the subject acid useful as an intermediate of pharmaceuticals, agrochemicals, etc., in high yield by performing reduction in an aqueous medium in the presence of Raney nickel catalyst wherein the catalyst is eas...
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JP2518146B2 |
PURPOSE: To obtain a 7β-hydroxy-bile acid such as ursodeoxycholic acid from the subject compound in high quality and yield by carrying out catalytic reduction reaction in a specific alcohol using an Ni catalyst in the presence of a base...
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JPH08183772A |
PURPOSE: To provide a method capable of producing nicotinic aldehyde in good yield while suppressing production of a by-product such as 3- hydroxymethylpyridine and readily confirming the end point of the reaction in producing nicotinic ...
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JP2514002B2 |
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JPH08176035A |
To economically obtain the subject compound useful as a raw material for epoxy resins, polyester resins and the like without using any dangerous catalyst by adopting a new process of hydrogenation of a butadiene diepoxide on a specified ...
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JP2513749B2 |
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JP2503031B2 |
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JPH08117604A |
PURPOSE: To provide a rare-earth metal-containing nickel catalyst which is used as an auxiliary catalyst in hydrogenation reaction, particularly in hydrogenation of non-saturated organic compounds, for example beef tallow, lard, fish oil...
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JPH0899956A |
PURPOSE: To obtain the subject compound by reaction of hexamethylenetetramine and hydrogen with a chloro-trichloromethylpyridine readily available and easy to handle as a raw material in the presence of a specific amine and a hydrogenati...
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JPH0892179A |
PURPOSE: To industrially and advantageously obtain the compound useful as a raw material for various chemicals by photooxidizing an N-protected furfurylamine to give a reaction product, without isolation, reducing the reaction product as...
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JPH0892184A |
PURPOSE: To obtain a new industrially and advantageously producible compound useful as an intermediate for producing 2,5-diaminotoluene as a hair dyeing agent or an intermediate for dye. CONSTITUTION: This 4-acylamido-3-methyl-cyclohexan...
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JPH0832702B2 |
The invention has as its subject a process for the preparation of thienylethylamines of the formula R-NR-R' where R represents the group and R' represents hydrogen or a group identical to R, by catalytic hydrogenation of a compound of th...
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JPH0832650B2 |
The catalytic hydrogenation of alpha , beta -unsaturated ketones of the formula R1-CH=CH-CO-R2, in which R1 and R2 independently of one another represent straight-chain or branched alkyl, hydroxy-alkyl, alkenyl, cycloalkyl, cycloalkenyl,...
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JPH0830018B2 |
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JPH0830065B2 |
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JPH0830026B2 |
This invention relates to an improved process for obtaining glyoxylic acid in the form of monohydrate by (1) ozonolysis of maleic acid in lower alkanol such as methanol, (2) catalytic hydrogenation of the ozonolysis product in the presen...
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JPH0873407A |
PURPOSE: To advantageously produce a lactic acid ester under mild conditions by reducing an industrially readily available glycidic acid ester as a raw material with hydrogen in the presence of a reducing catalyst. CONSTITUTION: This met...
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JPH0859572A |
To obtain a fluorinated aromatic amine in ultrahigh purity with a remarkably low content of defluorinated component by catalytically hydrogenating a fluorinated aromatic nitro compound in the liquid phase in the presence of a specific ca...
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JPH0853417A |
PURPOSE: To obtain aminopyridines having a halogen atom at α-position in high yield by subjecting cyanopyridines having a halogen atom at α-position to catalytic reduction in the presence of a Raney nickel catalyst having a specific pr...
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JPH0816101B2 |
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JPH08501490A |
PCT No. PCT/EP93/02385 Sec. 371 Date Jun. 12, 1995 Sec. 102(e) Date Jun. 12, 1995 PCT Filed Sep. 2, 1993 PCT Pub. No. WO94/06557 PCT Pub. Date Mar. 31, 1994A nickel/silica catalyst having a Ni/SiO2 molar ratio of 10 to 2.5, preferably 6 ...
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JPH0841065A |
PURPOSE: To simply and economically obtain a 1--azabicyclo[3.3.0]octane derivative useful as an intermediate raw material for medicines, agrochemicals, etc., e.g. a raw material for synthesizing a therapeutic agent for peptic ulcer and a...
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JPH089574B2 |
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JPH089592B2 |
The invention relates to a process for preparing compounds of the formula I I in which R stands for hydrogen, alkyl or aralkyl and R1 to R5 are identical or different radicals, (substituted) alkyl, cycloalkyl or (substituted) aryl or in ...
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