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JPH1087595A |
To obtain fluorinated nitrilles useful in the field of material chemistry in a high yield, by reacting an oxime with a sulfur fluoride derivative. The objective compound of formula II such as 1-(2- cyanoethyl)-2-(1-fluoro-1-methylethyl)b...
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JP2736801B2 |
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JP2724402B2 |
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JP2719296B2 |
PURPOSE: To enable a wide range of halogenation in specified solvents without using carbon tetrachloride having toxicity and volatility. CONSTITUTION: Halogenation reactions are carried out in solvents that are compds. of formula I (R is...
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JPH1045633A |
To provide a method for easily and safely producing a halogenated cyclic compound in high yield from a compound having a carboxyl group directly bound to an aromatic ring or a heterocyclic rind. This production of a halogenated cyclic co...
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JP2706454B2 |
The preparation of fluorobenzene and fluoropyridine compounds by diazotising the corresponding amino compound and decomposing the diazonium salt so formed, characterised in that the decomposition is carried out at super atmospheric press...
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JP2693126B2 |
PURPOSE: To provide N,N'-difluorinated diazacycloalkane derivatives represented by a specific formula which are readily obtainable from starting materials commercially available in substantial quantities and useful in the synthesis of ph...
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JPH09512540A |
PCT No. PCT/EP95/01439 Sec. 371 Date Oct. 22, 1996 Sec. 102(e) Date Oct. 22, 1996 PCT Filed Apr. 18, 1995 PCT Pub. No. WO95/29886 PCT Pub. Date Nov. 9, 1995The present invention relates to processes for the preparation of bromine-contain...
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JP2688657B2 |
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JP2689988B2 |
A process for chlorinating a compound of the formula (I) in which R1 is a C1-alkyl radical, C1-alkoxy radical or C1-thioalkyl radical, and X1, X2, X3 and X4 are identical or different hydrogen or halogen, and X3 may alternatively be or -...
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JP2685563B2 |
Disclosed is a process for continuous preparation of aromatic fluorides wherein aromatic diazonium fluorides are continuously decomposed at low concentration in a reaction system of one or more continuous agitated reactors.
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JPH09278686A |
To produce a fluorinated aromatic compound in high yield and selectivity by directly fluorinating a specified aromatic compound with fluorine in a reaction medium containing a polyfluoroalkanesulfonic acid. An aromatic compound of formul...
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JP2667485B2 |
A method of iodinating hydroxyaromatic and aminoaromatic compounds is disclosed, comprising reacting the hydroxyaromatic or aminoaromatic compound with an aqueous solution of a metal iodide and a metal hypochlorite at a temperature about...
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JP2667539B2 |
PURPOSE:To obtain the subject substance in high yield by absorbing a liquid organic compound having C-H bonds in cellular particles without changing the shape thereof in contact with F2 gas and then bringing the F2 gas into contact there...
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JPH09263549A |
To obtain the subject compound at a low cost and in a high yield, useful as a raw material for a quinazoline derivative by brominating a m- substituted benzene derivative such as 2-nitrotoluene in the presence of a specific compound. Thi...
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JPH09255657A |
To obtain the subject compound useful as a fluorine atom introducing agent by reacting a pyridine compound with boron trifluoride and a fluorine gas in the presence of both water and hydrogen fluoride. A pyridine compound of formula I (R...
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JPH09253501A |
To obtain such a halogenation catalyst for N-N-di-substd. formamide that has little volatility and is hardly harmful for an operator and the environment by preparing the catalyst from a compd. expressed by specified structural formula or...
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JPH09249653A |
To obtain a new optically active 1,2-benzisothiazole-1,1-dioxide derivative excellent in selectivity and reaction characteristics, and useful as the subject reagent to be used in the field of organic synthetic chemistry including medicin...
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JP2634217B2 |
The invention relates to a process for isomerizing and transiodinating iodoaromatic compounds over a non-acid catalyst.
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JPH09183737A |
To prevent a stirrer from deforming even in the case of especially a reaction using liquid hydrogen fluoride containing water at the time of the reaction by composing the stirrer of a carbonaceous material when producing a fluorine-conta...
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JPH09183741A |
To produce an organic compound having at least one fluorine atom according to a liquid-phase method by using a metallic halide catalyst having high activities. HF is added to an unsaturated C-C group by catalytic actions of a metallic ha...
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JPH09506609A |
PCT No. PCT/GB94/02732 Sec. 371 Date Oct. 25, 1996 Sec. 102(e) Date Oct. 25, 1996 PCT Filed Dec. 12, 1994 PCT Pub. No. WO95/16649 PCT Pub. Date Jun. 22, 1995According to the present invention there is provided a process for the selective...
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JPH09165350A |
To produce a substituted chloroaromatic compound useful as a raw material for a crop protecting agent and a drug at high yield in a state almost free from isomers by a simple process using easily available starting materials. This substi...
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JPH09157193A |
To obtain fluorinated allylic compounds in a high yield, useful for a field of a material science, a medicine, etc., by reacting a specific cyclopropane derivative with a dialkylaminosulfur trifluoride. The fluorinated allylic compounds ...
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JPH09124563A |
To safely produce a haloaniline derivative useful as an intermediate for couplers used for color photographic photosensitive materials in high purity without causing an environmental pollution in a state little in the generation of by-pr...
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JP2606875B2 |
PURPOSE:To produce the corresponding perfluoro-organic compound, by using a combination of fluorine gas and hydrogen fluoride as a fluorinating agent, in the continuous counter-current fluorinating of an organic compound with the fluorin...
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JPH09110736A |
To enhance P-position selectivity in nucleus chlorination and enable recovery of catalyst and reuse of the catalyst by using a Lewis acid catalyst supported on a polymer when the nucleus of benzene or its derivative is chlorinated with c...
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JPH09110801A |
To obtain in high yield a compound useful as an intermediate for peptide leukotriene antagonists without using any problematic solvent such as carbon tetrachloride, by photochemical reaction of a 4-methyl-3- methoxybenzoic ester with N-b...
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JP2600107B2 |
PURPOSE: To simply obtain a halofluoro compound in good yield using an inexpensive and readily handleable solid fluorinating agent by reacting an alkene together with a halonium ion generator with a metallic hydrofluoride as the fluorina...
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JP2598581B2 |
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JPH09503527A |
PCT No. PCT/GB95/01738 Sec. 371 Date Apr. 18, 1996 Sec. 102(e) Date Apr. 18, 1996 PCT Filed Jul. 24, 1995 PCT Pub. No. WO96/03356 PCT Pub. Date Feb. 8, 1996A method of halogenating an aromatic compound which comprises the steps of reacti...
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JPH0959250A |
To simply produce a compound, usable as a disinfectant for water in pools or cooling towers and useful as a photographic organic material by using a specific amount of a readily available dihalo-dimethylhydantoin at a low cost. (A) A 1,3...
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JPH0959197A |
To easily obtain the subject compound at low cost without using any halogen-based solvent harmful to the environment, useful as an organic material for color photographs, a photographic coupler or intermediate thereof, by using a specifi...
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JPH0948741A |
To provide a process for the selective production of a monofluorinated derivative useful e.g. as a precursor for bioactive compounds or a syntons for the synthesis of a fluorine-containing heterocyclic compound and a colorant. The object...
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JP2577567B2 |
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JP2573734B2 |
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JPH08512286A |
PCT No. PCT/EP94/01251 Sec. 371 Date Feb. 1, 1996 Sec. 102(e) Date Feb. 1, 1996 PCT Filed Apr. 20, 1994 PCT Pub. No. WO94/24098 PCT Pub. Date Oct. 27, 1994N-fluorosulfonimides of general formula I (R1-SO2)2NF(I), in which R1 means a meth...
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JP2565560B2 |
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JP2561726B2 |
4,4'-Dihalobiphenyls can be prepared by catalysed halogenation of biphenyls with halogenating agents, zeolites with pore widths of at least 5 ANGSTROM being employed as catalysts.
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JPH08325168A |
PURPOSE: To produce a [18F]-labeled organic compound in high yield and at a low cost while keeping high collection efficiency of a [18F]-fluoride ion by using a 4-aminopyridinium resin. CONSTITUTION: A labeled organic compound of the for...
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JP2559484B2 |
The invention relates to a process for isomerizing iodoaromatic compounds over a non-acidic zeolite catalyst in the liquid or gas phase in the presence of a source of iodine.
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JP2559483B2 |
The invention relates to a process for isomerizing liquid iodoaromatic compounds over an acid catalyst.
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JPH08301847A |
PURPOSE: To obtain 2-chloro-3-substituted pyridine in high yield and in high selectivity by reacting a substituted pyridine oxide with a specific chlorinating agent in the presence of a basic organic nitrogen compound, useful as a raw ma...
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JP2546697B2 |
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JP2535719B2 |
PURPOSE: To produce ortho-metalated substd. aromatic compd. and to selectively produce an ortho-fluorinated substd. aromatic compd. by bringing a metalating reagent into contact with an aromatic compd. having substituents which can direc...
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JPH08231473A |
To treat the subject complex by lowering a HF/amine ratio to separate out the amine, inhibiting the loss of the amine and the HF and suitably and profitably performing the addition of HF to an alkene halide without polluting environments...
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JPH08217752A |
PURPOSE: To improve the production yield of monochloro-3-cyanopyridine compound by using a specific chlorinating agent, wherein the monochloro-3- cyanopyridine compound is useful as a raw material for medicines and agrichemicals and has ...
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JPH08208609A |
PURPOSE: To easily obtain a fluoropyridine compound under mild conditions in high yield by fluorinating with an alkali metal fluoride a 1-substituted halogenopyridinium halide bearing a substituent on the N atom of the pyridine ring. CON...
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JP2522911B2 |
The present invention relates to a novel process for the preparation of an alpha , alpha -difluoroalkyl phenyl ether of formula I (I) wherein R1 is hydrogen, halogen, amino, nitro, -SO2-R4, -S-R5, -SO-R6 or -S-S-R7, R2 is hydrogen, halog...
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JPH08176096A |
To obtain a perfluoroalkanesulfonyl fluoride high in electrical efficiency and fluorine utilization efficiency by electrochemically fluorinating an easily obtainable starting material. This compound, e.g. N,N-bis-methanesulfonimide is ob...
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