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JP2513758B2 |
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JPH08169853A |
To easily produce an iodonium salt from an easily available raw material in high yield while avoiding strict requirement and reaction condition of the reaction material by contacting a mixture of an iodoaryl dicarboxylate and an acid. A ...
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JPH08157394A |
PURPOSE: To readily obtain the subject compound in high selectivity because of simple separation/recovery of an acid and no requirement of complicated operation in waste water treatment, by using a solid acid catalyst in iodating an arom...
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JPH08157457A |
PURPOSE: To readily and efficiently remove a halogen-containing pyridine from a solution containing a specific halogen-pyridine formed in a specific fluorination reaction by removing only the halogen in the halogen-containing pyridine by...
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JP2502999B2 |
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JPH08127543A |
PURPOSE: To simply obtain the subject compound in high selectivity and in high yield by mixing a phenol compound, a quaternary ammonium bromide compound and bromine in a solvent. CONSTITUTION: A quaternary ammonium bromide of formula I (...
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JPH0899967A |
To obtain the subject compound simply producible from readily obtainable starting substances, useful an electrophilic fluorinating agent having excellent storage stability, by reacting a compound of a specific formula with fluorine in an...
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JPH0830073B2 |
Chlorination of carbohydrates and alcohols utilizing a chlorinating reagent selected from triphenylphosphine oxide/ thionyl chloride, thiphenylphosphine oxide/phosgene, triphenylphosphine sulfide/thionyl chloride and triphenylphosphine s...
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JPH0830020B2 |
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JPH0822823B2 |
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JPH0859515A |
PURPOSE: To provide a practical production process for monobromomethyl- aromatic compound in monobromomethylation in high selectivity in high conversion through bromination of a methyl side-chain in an aromatic compound with bromine in h...
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JPH0817944B2 |
Disclosed in a shaped zeolite catalyst used for liquid phase organic reactions. The shaped zeolite catalyst is composed of substantially spherical particles having a particle diameter substantially in the range of from 70 to 300 mu m, an...
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JPH0819007B2 |
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JPH0853399A |
To obtain the subject compound in a short time in a high yield without spontaneous decomposition, by using a diamide as a reaction solvent in fluorinating an aromatic chlorine compound or an aromatic bromine compound with an alkali metal...
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JPH0853371A |
PURPOSE: To brominate a methyl group of a methylated aromatic compound in high selectivity and yield in a short time by reacting a specific methylated aromatic compound with bromine in the presence of bentonite in a specific solvent at a...
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JPH085809B2 |
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JPH085879B2 |
The invention relates to a novel process for the halogenation in 2-position of ergot alkaloids. The process is characterized by that as a halogenating agent a system consisting of dimethylsulfoxide, a trialkylhalosilane or triarylhalosil...
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JPH07330641A |
PURPOSE: To efficiently obtain a halogenated aromatic compound at a low temperature by simplified reaction step without discharging waste liquid by reacting an aromatic compound with a molecular halogen in vapor phase using a specific me...
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JPH07330665A |
PURPOSE: To produce a halogenated aromatic compound at a low temperature in a high efficiency without discharging waste liquid by directly halogenating an aromatic compound with a molecular halogen in gaseous phase using a specific zeoli...
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JPH07300480A |
PURPOSE: To provide a process for the production of 2-acylamino-6-chloropurine and 2-amino-6-chloropurine almost completely dispensing with a step to separate unreacted guanine. CONSTITUTION: 2-Acylamino-6-chloropurine is produced by rea...
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JPH07100707B2 |
Fluorinated diazabicycloalkane derivative of the following Formula I :- wherein n represents 0, 1 or 2; R represents a quaternizing organic group; each R<1>, R<2>, R<3>, R<4> and R<5> independently represents hydrogen, C1-C6 alkyl, aryl,...
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JPH0798756B2 |
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JPH0798760B2 |
The subject of the present invention is an improved liquid-phase fluorination process in the presence of a catalyst and a plant for the use of this process. The process consists in the reaction, in a reaction region, of hydrofluoric acid...
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JPH07278126A |
PURPOSE: To provide new compounds such as benz-1,2,3-oxathiazin-4(3F)-one-2,2- dioxides useful as electrophilic fluorinating agents which can be used in the fluorination of compounds having carbanion character. CONSTITUTION: The objectiv...
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JPH07267885A |
PURPOSE: To obtain a new compound, having fluorine atoms and useful as a material for low-viscosity liquid crystals, a chiral dopant, a raw material, etc., for medicines and agrochemicals. CONSTITUTION: This compound is expressed by form...
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JPH07247236A |
PURPOSE: To provide a method capable of producing a p-bromophenol safely and efficiently without evolving hydrogen bromide. CONSTITUTION: A phenol (e.g. 2-methylphenol) nonsubstituted at p-position and at least one o-position based on a ...
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JPH07233097A |
PURPOSE: To obtain an electrophilic fluorination agent effective for improving the reaction yield and reaction rate and having excellent safety by spray-drying a solution of a specific compound to form fine powder of the compound. CONSTI...
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JPH07233102A |
PURPOSE: To provide a process effective for preventing the discoloration of the reaction product caused by the surface corrosion of apparatuses, preventing the corrosion of the apparatus main body and keeping good reaction result. CONSTI...
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JPH0780796B2 |
Manufacture of 1,1,1,2-tetrafluoroethane (F134a) by catalytic gas-phase fluorination of 1-chloro-2,2,2-trifluoroethane (F133a). A mixed catalyst is employed, consisting of nickel and chromium oxides, halides and/or oxyhalides deposited o...
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JPH0780791B2 |
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JPH0780792B2 |
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JPH0768152B2 |
Primary and/or tertiary allyl halides are prepared by reaction of a hydrogen halide (e.g. hydrogen chloride) with a terminal conjugated diene (e.g. myrcene, beta -farnesene, beta -springene or 15-chloro- beta -springene) in the presence ...
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JPH07179365A |
PURPOSE: To provide a process for fluorinating an organic substance in an inert liquid medium. CONSTITUTION: A process for producing a fluorinated organic substance is provided which comprises the steps of: (A), providing a reaction syst...
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JPH0759538B2 |
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JPH07149726A |
PURPOSE: To provide a selective 6-chlorination of 3-methylpyridine. CONSTITUTION: 3-Methylpyridine is chlorinated in the presence of a catalytic amount of palladium chloride to give 2-chloro-5-methylpyridine.
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JPH07505122A |
Active methine compounds are chlorinated by contacting such compounds with a perchloroalkane and aqueous base in the presence of a phase transfer catalyst which is an tetraalkylonium hydroxide. Chlorinated products, preferably tertiary a...
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JPH07145115A |
PURPOSE: To obtain the subject compound on an industrial scale by allowing a 4-trihalogenated methylphenyl isocyanate to react with an anhydrous hydrofluoric acid, and converting the obtained aniline hydrofluoride into the free amine usi...
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JPH0751538B2 |
A nitrogen-containing perfluoroalkyl bromide, a novel compound to the art, is represented by the formula, wherein Rf1 and Rf2 independently stand for a perfluoroalkyl group of one to five carbon atoms, provided that Rf1 and Rf2 are 1) se...
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JPH0733340B2 |
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JPH07502728A |
Compounds having acidic protons and a molecular structure which can delocalize the electron density of the conjugate base (target compounds) are chlorinated by contacting such compounds with a perchloroalkane and aqueous base in the pres...
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JPH0720889B2 |
Process for the preparation of aryl fluoride by bringing a gaseous mixture containing hydrofluoric acid and an aryl haloformate or carbonate into contact with a catalyst based on Lewis acids.
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JPH0761939A |
PURPOSE: To obtain an aromatic fluorocompound in a high selectivity, from an aromatic aminocompound (especially from the compounds having a polar group such as a hydroxyl or an alkoxyl group at the para or ortho position to the amino gro...
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JPH0748297A |
PURPOSE: To simply and efficiently carry out bromination of an aromatic compound. CONSTITUTION: An aromatic compound is brominated using 1,3-dibromo-5,5- dimethylhydantoin in an organic solvent in the presence of a hydroacid.
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JPH06102079B1 |
The invention relates to a method of preparing a chlorinated, brominated, radiobrominated, iodinated and/or radio-iodinated aromatic or heteroaromatic compound, in which the (hetero)aromatic nucleus optionally comprises one or more addit...
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JPH0696115B2 |
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JPH06316544A |
PURPOSE: To easily and rapidly prepare an aromatic compound by using a small amount of a copper salt of a hydroxy carboxylic acid from an aryldiazonium salt. CONSTITUTION: An aromatic compound of formula Ar-X (Ar is optionally substitute...
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JPH06306043A |
PURPOSE: To obtain the compound useful as an intermediate for medicines, pesticides, etc., in a high yield, while reducing side reactions, by chlorinating an alkylmercaptan compound with a chlorinating agent in the presence of a catalyti...
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JPH0684316B2 |
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JPH06509115A |
(57) [Summary] Since this publication is application data before electronic filing, summary data is not recorded.
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JPH0676343B2 |
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