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JP2000178256A |
To obtain the subject compound in a short time at a high yield by dehydrogenating imidazolines by using a specific catalyst.The objective imidazoles of formula II are obtained by subjecting imidazolines of formula I (R1-R4 are each an al...
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JP3045574B2 |
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JP2000136156A |
To provide a method for selectively producing hydrogenated cyclododecanol and isomerized cyclododecane by reacting an epoxy cyclododecane with hydrogen, while controlling formation of by-product hydrocarbons, e.g. cyclododecadiene, cyclo...
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JP3038271B2 |
PURPOSE: To enable high-yield production of the subject compound from ethylene cyanohydrin using a Raney cobalt catalyst with extremely high industrial advantage. CONSTITUTION: Catalytic hydrogenation of ethylene cyanohydrin is carried o...
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JP2000109468A |
To produce a 6,7-dialkoxyquinoxaline derivative by a method using a dialkoxynitroaniline low in explosive danger and good in stability as an intermediate and comprising reacting the nitroaniline compound with hydrogen and a dicarbonyl co...
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JP3030091B2 |
PCT No. PCT/IB95/00754 Sec. 371 Date Apr. 17, 1997 Sec. 102(e) Date Apr. 17, 1997 PCT Filed Sep. 13, 1995 PCT Pub. No. WO96/10564 PCT Pub. Date Apr. 11, 1996A process for the preparation of CCK antagonists of the formula wherein X, Y1 an...
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JP3031727B2 |
PCT No. PCT/JP92/00094 Sec. 371 Date Sep. 25, 1992 Sec. 102(e) Date Sep. 25, 1992 PCT Filed Jan. 31, 1992 PCT Pub. No. WO92/13840 PCT Pub. Date Aug. 20, 1992.A process for producing an aminomethylpyridine having a chlorine atom at the (a...
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JP2000095742A |
To readily obtain a highly purified acetamide by treating an aqueous solution of acetamide obtained by hydrating acetonitrile with a cation exchange resin.This anhydrous, highly purified acetamide is obtained by treating (B) an aqueous s...
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JP3027631B2 |
The present invention relates to a new process for the preparation of N-(2-chloro-pyridin-5-yl-methyl)-ethylene-diamine of the formula (I) (I) in a technically simple manner in high yield and in very good quality. The new process is char...
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JP2000086583A |
To obtain a high-purity fluorine-containing benzyl derivative useful as a synthetic intermediate for a medicine, etc., in a short process in a high yield by reducing a specific fluorine-containing benzonitrile derivative and replacing an...
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JP3024328B2 |
PURPOSE: To produce acrylamide or methacrylamide in high ef-ficiency while preventing the reactional activity of a Raney-copper catalyst used in the catalytic hydration reaction of acrylonitrile or methacrylonitrile. CONSTITUTION: A Rane...
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JP3021109B2 |
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JP3021883B2 |
According to the new process, the hydrogenation of unsaturated fatty acid nitriles or mixtures of unsaturated and saturated fatty acid nitriles is carried out in the liquid phase in the presence of nickel catalysts or cobalt catalysts. I...
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JP3016727B2 |
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JP3001685B2 |
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JP2998377B2 |
PURPOSE: To prevent the lowering of the activity of a metallic copper catalyst in the production of methacrylamide useful as a raw material for polymers having various applications by the catalytic hydration reaction of methacrylonitrile...
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JP2000001489A |
To obtain a new compound capable of using as a production intermediate for compounds having pharmacological properties and useful as medicines. This compound is represented by formula I [R is H- or ≤18C alkyl or alalkyl; an amine funct...
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JPH11322647A |
To economically and selectively obtain a butanediol in an industrially advantageous way by reacting a specific compound with formaldehyde in the presence of a carboxylic acid and a specific amine, followed by hydrogenation. This 1, 4-but...
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JP2978072B2 |
PURPOSE: To decrease energy consumption by adding and mixing a lubricant and an additive to a binder powder consisting of a catalyst alloy containing a specific alloy component and a specific pure catalyst metal, forming the mixture, sin...
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JP2968104B2 |
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JP2961247B2 |
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JP2956994B2 |
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JP2952702B2 |
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JP2951790B2 |
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JPH11246558A |
To provide a method capable of recovering a desired optical isomer in a high yield and resultingly producing the racemate of 3-quinuclidinol useful as a pharmaceutical, agrochemical or the like by bringing an optically active 3-quinuclid...
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JP2944793B2 |
PURPOSE: To suppress formation of a secondary amine as a by-product and obtain the subject compound in high yield by specifying the feed rate of a raw material N,N-dialkylaminoacetonitrile and using a Raney nickel as a catalyst in cataly...
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JP2945728B2 |
An improved process for the preparation of cyclic amino acids by a novel synthesis is described where a dinitrile derivative is converted in two steps to the desired products, as well as valuable intermediates used in the process.
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JP2938975B2 |
PCT No. PCT/FR95/01643 Sec. 371 Date Sep. 15, 1997 Sec. 102(e) Date Sep. 15, 1997 PCT Filed Dec. 12, 1995 PCT Pub. No. WO96/18603 PCT Pub. Date Jun. 20, 1996A process for the hemihydrogenation of aliphatic dinitriles to the corresponding...
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JP2939335B2 |
A novel process for producing amino carboxylic acid salts useful as the starting material of agricultural chemicals and medicines, chelating agents, food additives, etc., which comprises oxidatively dehydrogenating amino alcohol in the p...
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JP2937083B2 |
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JP2935288B2 |
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JPH11197622A |
To detoxify harmful chlorides represented by dioxin into harmless compounds. A Raney Ni-Al alloy is added into a mixed liquid of an aromatic chloride and a diluted alkali aqueous solution, or a diluted alkali aqueous solution is added in...
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JP2916256B2 |
A novel process for producing salts of amino carboxylic acids, which are useful as the starting material of agricultural chemicals and medicines, chelating agents, food additives and so forth. The process comprises oxidatively dehydrogen...
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JP2909231B2 |
In an advantageous process for producing powdered aluminium alloys which have a catalytic action or are capable of acting as precursors of catalysts, good results are obtained if the alloy is atomized with water and/or a gas at a tempera...
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JPH11158155A |
To provide a method for producing the subject compound useful as an agricultural or pharmaceutical solvent or the like by which the compound is continuously produced in a high yield by reacting a specific urea derivative with a specific ...
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JPH11158130A |
To provide a method for profitably producing an aminopolycarboxylic acid having an excellent chelating ability or its salt from an inexpensive raw material in a high purity in a high yield and at a low cost. This method for producing an ...
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JP2898553B2 |
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JP2898604B2 |
The prepn. of lactam comprises: (i) semi-hydrogenation of dinitrile to aminonitrile; (ii) simple purification of aminonitrile prod.; and (iii) hydrolysis/cyclisation of aminonitrile.
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JPH11130739A |
To efficiently obtain the subject high purity compound without using mercury at all by reacting isovanillin with ammonia in the presence of an alkali hydroxide. This compound is obtained by reacting (A) isovanillin with (B) ammonia in th...
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JP2888537B2 |
Catalysts made by the Raney process (e.g., Raney process nickel) pelletized in matrix of polymer and plasticizer are activated by either (a) removal of plasticizer (e.g., by solvent extraction) followed by leaching out Al with caustic so...
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JPH11106367A |
To obtain the subject compound useful as a raw material for heat- resistant polymers used as electronic materials in a high purity and in a high yield under mild reaction conditions by reducing a bisnitrohydroxyphenyl compound with a hyd...
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JPH11100356A |
To obtain bis(3-amino-4-hydroxyphenyl)s in high purity and high yield by treating crude bis(3-amino-4-hydroxyphenyl)s with a solvent containing lower alcohols. Crude bis(3-amino-4-hydroxyphenyl)s are treated with a solvent containing low...
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JP2877919B2 |
Process for the preparation of N-substituted pyrrolidin-2-ones of the general formula I in which R<1> represents a C1- to C20-alkyl group, a C6- to C10-aryl group or a C7- to C12-aralkyl group, by cleaving 5-iminopyrrolidin-2-ones of the...
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JP2873509B2 |
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JP2871778B2 |
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JP2871919B2 |
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JPH1160574A |
To produce endotropine without accompanying danger of fire and explosion. This method for producing endotropine comprises reducing tropanone with hydrogen activated by catalytic action of Raney nickel or Raney copper. In the method, trop...
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JPH1160525A |
To obtain a diol useful as a raw material for various polyesters and polyurethanes in an industrially advantageous way by adding a specific sulfur atom-contg. compound to a crude reaction liquor produced by reduction from the correspondi...
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JP2857489B2 |
A process for the preparation of pyridine-3-sulphonic acid free of heavy metal by oxidation of 3-chloropyridine to 3-chloropyridine N-oxide, replacement of chlorine by a sulpho group, followed by reduction to pyridine-3-sulphonic acid. T...
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JPH1129537A |
To obtain the subject compound that is a synthetic intermediate of a quinoline derivative that has the action to selectively stimulate serotonin 4 receptor without occurrence of borane of high toxicity by hydrogenating a specific compoun...
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