摘要:
An object of the present invention is to provide a production method that makes it possible to produce 1,1-dibromo-1-fluoroethane easily and sustainably. The present invention provides a method for producing 1,1-dibromo-1-fluoroethane, the method comprising step A of reacting 1,1-dibromoethylene with hydrogen fluoride to obtain 1,1-dibromo-1-fluoroethane.
摘要:
The invention relates to a potassium fluoride which a part or all of the initial particles, of which particle diameter is 0.1 to 5 µm, are flocculated to form particles having 5 to 25 µm of volumetric average particle diameter. The potassium fluoride is useful in producing a fluorine-containing organic compound from an organic compound having at least one group capable of being substituted nucleophilically with a fluorine atom.
摘要:
A process for the production of 1,1-difluoroethane (HFC-152a) comprises: (a) providing a reaction vessel, (b) providing in the reaction vessel activated carbon impregnated with a strong Lewis acid fluorination catalyst wherein the strong Lewis acid catalyst is selected from the group consisting of halides of As, Sb, Al, Tl, In, V, Nb, Ta, Ti, Zr and Hf, (c) activating the catalyst by passing through the activated carbon impregnated with a strong Lewis acid fluorination catalyst anhydrous hydrogen fluoride gas and chlorine gas, (d) contacting, in a vapor state in the reaction vessel containing the activated catalyst, hydrogen fluoride and one or more halogenated hydrocarbons selected from the group consisting of chlorofluoromethane, dichloromethane, 1,1,1-trichloroethane, vinyl chloride, 1,1-dichloroethylene, 1,2-dichloroethylene, 1,2-dichloroethane, and 1,1-dichloroethane for a time and at a temperature to produce a product stream comprising hydrofluorocarbon product(s) corresponding to the chlorinated hydrocarbon reactant(s), and one or more of hydrogen chloride, unreacted chlorinated hydrocarbon fluoride, and (e) separating the hydrofluorocarbon product(s) from the product stream.
摘要:
The present invention relates to a new process for preparing estrogen-antagonistic 11 β-fluoro-17α-alkylestra-1,3,5(10)-triene-3,17-diols of the general formula (I) having a 7α-(ξ-alkylamino-ω-perfluoroalkyl)alkyl side chain and to α-alkyl(amino)-ω-perfluoro(alkyl)alkanes of the general formula (II), to processes for their preparation and to the intermediates required for this purpose.
摘要:
The present invention relates to a new process for preparing estrogen-antagonistic 11β-fluoro-17α-alkylestra-1,3,5(10)-triene-3,17-diols of the general formula I having a 7α-(ξ-alkylamino-ω-perfluoroalkyl)alkyl side chain and to α-alkyl(amino)-ω-perfluoro(alkyl)alkanes of the general formula II, to processes for their preparation and to the intermediates required for this purpose.
摘要:
A process for the production of halogenofluorocarbons by fluorinating a halogenated hydrocarbon in a reaction system containing an antimony halide of the general formula: SbClpF5-p [wherein p is 0 to 2], hydrogen fluoride, and the halogenated hydrocarbon serving as the starting material with the molar ratio of the antimony halide to hydrogen fluoride being set in the range of 40/60 to 90/10. According to this process, halogenofluorocarbons (HFC) important as the substitute for CFC or HCFC can be highly selectively and economically produced with decreased corrosion of the reactor.
摘要:
A process for the production of halogenofluorocarbons by fluorinating a halogenated hydrocarbon in a reaction system containing an antimony halide of the general formula: SbClpF5-p [wherein p is 0 to 2], hydrogen fluoride, and the halogenated hydrocarbon serving as the starting material with the molar ratio of the antimony halide to hydrogen fluoride being set in the range of 40/60 to 90/10. According to this process, halogenofluorocarbons (HFC) important as the substitute for CFC or HCFC can be highly selectively and economically produced with decreased corrosion of the reactor.
摘要:
The invention relates to a novel method for producing nucleophilic substitutions, particularly of type SNAr and SN2. More specifically, the invention relates to the use as a fluorinating reaction medium of ionic liquid or fused salt comprising at least four carbon atoms. The invention can be used for the synthesis of fluoride derivatives.