- Preparation process of fluorine substituted aromatic compound
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A preparation process of a fluorine substituted aromatic compound comprising reacting an alkali metal or alkali earth metal salt of an aromatic compound having a hydroxy group with an organic fluorinating agent is disclosed. As a representative fluorinating agent, a bis-dialkylamino-difluoromethane compound, for example, 2,2′-difluoro-1,3-dimethylimidazolidine, is exemplified. According to the process, an industrially useful fluorinated aromatic compound, for example, a fluorobenzene, a fluorine substituted benzophenone, a fluorine substituted diarylsulfone can be prepared with ease in economy without specific equipment.
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- Methylhexamethylenetetramine fluoride dihydrate: A new fluorodenitration reagent
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Methylhexamethylenetetramine fluoride dihydrate has been prepared by conventional methods. It is moderately soluble in polar aprotic solvents, and shows good thermal stability, enabling it to be dried. The reagent is capable of converting activated nitroaromatics to the corresponding fluoroaromatics, with a high selectivity to monofluorodenitration being observed with some polysubstituted aromatics.
- Clark, James H.,Nightingale, David J.
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- PREPARATION OF AROMATIC FLUORIDES VIA DIAZOTIZATION AND PHOTOCHEMICALLY INDUCED FLUORO-DEDIAZONIATION OF AROMATIC AMINES IN ANHYDROUS HYDROGEN FLUORIDE - ORGANIC BASE SOLUTIONS
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Fluoro-dediazoniation of aromatic diazonium ions, produced by the diazotization of the corresponding aromatic amines with NaNO2 in anhydrous hydrogen fluorides (AHF) - organic base solutions, was accelerated photochemically to afford Ar-F efficiently in AHF - organic base solutions in situ.
- Yoneda, Norihiko,Fukuhara, Tsuyoshi,Kikuchi, Tetsuo,Suzuki, Akira
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p. 865 - 872
(2007/10/02)
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