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WO/1989/001469A1 |
This invention provides a process for purifying 4,4'-dihydroxydiphenyl sulfone, which comprises dissolving crude 4,4'-dihydroxydiphenyl sulfone in an aqueous solution of a basic substance, conducting salting out to precipitate and separa...
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WO/1988/009782A1 |
A process for preparing an aromatic propargyl ether, preferably bispropargyl ether, from hydroxyaromatic compounds comprising vigorously stirring a propargyl halide, preferably propargyl chloride, with a hydroxyaromatic compound, such as...
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WO/1988/007511A1 |
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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WO/1988/007513A1 |
The invention relates to a process for the vapor phase bromination of aromatic compounds in the presence of oxygen and a catalyst containing an oxidizing metal and an inert support.
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WO/1988/007512A1 |
The invention relates to a process for isomerizing and transiodinating iodoaromatic compounds over a non-acid catalyst.
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WO/1988/007510A1 |
The invention relates to a process for isomerizing liquid iodoaromatic compounds over an acid catalyst.
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WO/1988/001617A1 |
An improvement in processes for preparing diaryl sulfones comprising adding a limited amount of water to the reaction product mixture of such processes to form a heavier aqueous phase containing unreacted monosubstituted benzene sulfonic...
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WO/1986/006370A1 |
A process for preparing 4,4'-dihydroxydiphenyl sulfone, which comprises subjecting phenol and a sulfonating agent or phenolsulfonic acid to dehydration reaction in the presence of a solvent, then keeping the temperature of the reaction s...
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WO/1985/004655A1 |
Compounds having the general formula (I) wherein X and Y represent individually H or -NO, at least one of them being a group -NO, n is 0, 1 or 2, R represents hydrogen, an aliphatic, cycloaliphatic, cycloaliphatic-alkyl, aryl or aralkyl ...
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WO/1983/004251A1 |
A process for producing diaryl sulfones, which comprises reacting a mixture of an aromatic hydrocarbon represented by formula I: (wherein one of X and Y represents a halogen atom, and the other represents a hydrogen atom or a halogen ato...
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JP7385827B2 |
A compound represented by the following formula (1).(In the formula (1), A is a group containing a heteroatom; R1 is a 2n-valent group having 1 to 30 carbon atoms and optionally having a substituent; R2 to R5 are each independently a lin...
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JP2023548180A |
The present invention relates to a method for preparing aryl vinyl sulfones. The method comprises a catalytic complex of halogenated Cu(I) and a ligand selected from monodentate, bidentate, or polydentate amine ligands; ) forming a first...
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JP7324930B2 |
The invention relates to carbamate-substituted styryl sulfone compounds and preparation methods and uses thereof. The carbamate-substituted styryl sulfone compounds of the invention have a structure of general formula (I). The compound o...
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JP7315186B2 |
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JP7303893B2 |
The invention belongs to the technical field of pesticides and specifically relates to an aryl sulfide containing a benzylamine structure, a synthesis method therefor, and an application thereof. The aryl sulfide is denoted as compound I...
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JP2023092930A |
To develop a material suitable for fluorescent labeling agents that can absorb long-wavelength light and emit fluorescence with small molecular size.The invention provides compounds having a sulfonyl aniline skeleton represented by the g...
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JP7282267B2 |
The present invention relates to an N-(4-((4-(3-phenylureido)phenyl)sulfonyl)phenyl)benzenesulfo
namide in the polymorphic form ω18.9, characterised by an x-ray powder diffractogram having the Bragg angles (2θ/CuKα) 10.9, 11.7, 14.6, ...
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JP2022552602A |
The present invention provides the following steps: (a) crude 4,4'-dichlorodiphenylsulfone, which may contain water, is dissolved in an organic solvent in which 4,4'-dichlorodiphenylsulfone has a solubility of 0.5 to 20% at 20°C; adding...
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JP7191831B2 |
A method for recovering dimethyl sulfoxide, including a step of contacting a recovered resist remover containing at least one compound selected from the group consisting of glycol ether, glycol and triol, and dimethyl sulfoxide with wate...
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JP2022551556A |
The present invention (a) providing a suspension comprising particulate 4,4'-dichlorodiphenylsulfone in carboxylic acid; (b) solid-liquid separation of the suspension to obtain a filtrate containing 4,4'-dichlorodiphenylsulfone containin...
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JP2022176085A |
To provide a novel meta-type ester-based aromatic diamine and a method for producing the same, and a polyimide synthesis.For example, it is a compound (b) obtained by the following reaction.SELECTED DRAWING: None
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JP2022548512A |
The present invention uses 4,4'-dichlorodiphenylsulfone and linear C as organic solvent.6~C10A method for obtaining 4,4'-dichlorodiphenylsulfone from organic mixtures containing carboxylic acids: (a) the organic mixture (a1a) mixing said...
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JP2022548511A |
The present invention relates to 4,4'-dichlorodiphenyl sulfoxide and at least one linear C6~C10A method for making 4,4'-dichlorodiphenylsulfone comprising reacting a solution comprising a carboxylic acid with an oxidizing agent to obtain...
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JP2022547825A |
The present invention (a) reacting 4,4'-dichlorodiphenyl sulfoxide with an oxidizing agent in at least one carboxylic acid as a solvent to obtain a reaction mixture comprising 4,4'-dichlorodiphenyl sulfone and a carboxylic acid; (b) sepa...
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JP2022546232A |
The present invention relates to a crystal (C) composed of at least 98% by mass of 4,4'-dichlorodiphenylsulfone, 0 to 2% by mass of impurities, and 0 to 2% by mass of at least one solvent (c). It is. Furthermore, the present invention re...
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JP2022545831A |
The present invention is a method for producing 4,4'-dichlorodiphenylsulfone, comprising: (I) reacting thionyl chloride, chlorobenzene and aluminum chloride to form an intermediate reaction product and hydrogen chloride; (II) mixing aque...
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JP2022544031A |
The present invention relates to methods for preparing various difluorohaloallylamine derivatives. The present invention also relates to novel difluorohaloallylamine derivatives capable of inhibiting specific amine oxidase enzymes. These...
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JP2022133940A |
To provide an isomer preparation device capable of acquiring a desired isomer at high yield, from an isomer mixture.There is provided an isomer preparation device for selectively preparing one isomer out of an isomer mixture, the device ...
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JP7123464B2 |
Provided are a novel crystal form of 4,4'-bis(2,3-dibromopropoxy)-3,3',5,5'-tetrabromodiphenyl sulfone having excellent thermal stability and a high melting point and a method for producing the crystal form. A crystal form (II-form cry...
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JP2022116370A |
To provide a compound useful as an agricultural and horticultural agents, in particular, a pest control agent for agriculture and horticulture, an acarid pest control agent, a nematode control agent or a disease control agent.As an activ...
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JP7082763B2 |
The present invention relates to a method for distilling a liquid containing dimethyl sulfoxide using a distillation equipment, including:(1) mixing sodium carbonate with a liquid containing dimethyl sulfoxide at a bottom of the distilla...
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JP2022527616A |
The present invention comprises a solid DCDPSO and solvent by washing the composition with carboxylic acid until the amount of solvent in the composition is less than 1.5% by weight based on the total amount of the washed composition. Wi...
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JP2022522109A |
The present invention (a) Reaction of thionyl chloride, chlorobenzene and aluminum chloride with a molar ratio of thionyl chloride: chlorobenzene: aluminum chloride of 1: (6 to 9): (1 to 1.5) at a temperature in the range of 0 to less th...
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JP7050005B2 |
The present invention relates to novel crystalline modifications of N-(4,5-bismethanesulfonyl-2-methylbenzoyl)guanidine hydrochloride, novel N-(4,5-bismethanesulfonyl-2-methylbenzoyl)guanidine salts and their crystalline modifications an...
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JP2022520769A |
The present invention relates to a crystal (C) consisting of at least 95% by weight of 4,4'-dichlorodiphenyl sulfoxide, 0 to 2% by weight of impurities, and 0 to 3% by weight of an organic solvent (os). Moreover, the present invention re...
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JP2022520199A |
The present invention (I) Reaction of thionyl chloride, chlorobenzene and aluminum chloride with a molar ratio of thionyl chloride: chlorobenzene: aluminum chloride of 1: (6 to 9): (1 to 1.5) at a temperature in the range of 0 to less th...
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JP2022520200A |
The present invention relates to a method for obtaining 4,4'-dichlorodiphenyl sulfoxide from a liquid mixture containing 4,4'-dichlorodiphenyl sulfoxide and a solvent. (a) A step of cooling the liquid mixture to a temperature below the s...
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JP2022520198A |
The present invention (a) A step of providing a suspension containing particulate 4,4'-dichlorodiphenyl sulfoxide in monochlorobenzene, and (b) A step of solid-liquid separation of the suspension to obtain 4,4'-dichlorodiphenyl sulfoxide...
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JP7027509B2 |
A process for preparing diaryl sulfones is disclosed. The process comprises coupling an aryl compound with a sulfonic acid to provide a diaryl sulfone. The sulfonic acid is coupled to the aryl compound in the presence of a catalyst as de...
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JP7023080B2 |
In a cross coupling reaction, in a case where a halogen atom is selected as the leaving group of the raw material compound, a harmful halogen waste forms as a by-product after the reaction, and disposal of the waste liquid is complicated...
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JP6986063B2 |
A process for preparing polyaryl ethers in which a polycondensation of the monomer building blocks is carried out using microwave irradiation leads to thermoplastic molding compositions having improved color properties.
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JP6976518B2 |
Disclosed is a method of synthesizing a (1R,2R)-nitroalcohol compound of formula (I), as shown in the following reaction scheme, including: subjecting a compound of formula (II) and a compound of formula (III) to a condensation reaction ...
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JP6941893B2 |
A diphenylsulfone compound containing 4,4′-dihydroxydiphenylsulfone is produced in good yield in a short time and at a relatively low temperature. A diphenylsulfone compound represented by formula (2) below is produced by irradiating, ...
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JP2021524487A |
The present invention relates to any one of the following compounds of formula (Ie) or pharmaceutically acceptable salts thereof. Where Y1Represents an aryl group, X2-O- group, -NH- group, -S- group, -CO-NH- group, -NH-CO-NH- group, -NH-...
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JP6905053B2 |
The present invention discloses a nicotinyl alcohol ether derivative, a preparation method therefor, and a pharmaceutical composition and uses thereof. Specifically, the invention relates to nicotinyl alcohol ether derivatives represente...
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JP6893627B1 |
To provide a metal-free catalytic oxidation system which avoids environmental pollution due to outflow of a metal catalyst and at the same time improves production efficiency. According to the present invention, a raw material feeding de...
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JP6866316B2 |
The present invention refers to substituted imidazolium sulfuranes, the use thereof for the transfer of a -CN group or an alkyne group.
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JP6839051B2 |
A process for the manufacture of a haloaryl compound which comprises contacting a mixture of dihalodiarylsulfone isomers [mixture (M)] with sulfuric acid to provide a mixture of haloarylsulfonic acid isomers [mixture (M1)] and reacting m...
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JP6832918B2 |
The invention relates to a method for the stereoselective preparation of compounds of formula (IV)
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JP6831380B2 |
Herein, the substituents are radicals such as alkyl and substituted phenyl.
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