- Preparation method of trifluoroacetophenone derivative
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The invention relates to the field of organic synthesis, in particular to a preparation method of a trifluoroacetophenone derivative. Substituted aniline is used as a raw material, and preparation of the trifluoroacetophenone derivative is completed through three steps including diazotization reaction, coupling reaction and hydrolysis reaction. The preparation method has the advantages of simple process, high yield and less three wastes generated by the whole reaction, and is suitable for large-scale industrial production.
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Paragraph 0037; 0040-0041
(2021/10/05)
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- Metal-free defluorinative arylation of trifluoromethyl alkenes: Via photoredox catalysis
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Literature methods to access gem-difluoroalkenes are largely limited to harsh, organometallic-based methods, and known photoredox-mediated processes are not amenable to aryl radical addition to trifluoromethyl alkenes. A metal-free, functional group-tolerant method for the preparation of benzylic gem-difluoroalkenes is described. Halogen atom abstraction from (hetero)aryl halides generates aryl radicals that undergo a defluorinative arylation of α-trifluoromethyl alkenes, tolerating electronically disparate aryl radicals and α-trifluoromethyl alkenes.
- Wiles, Rebecca J.,Phelan, James P.,Molander, Gary A.
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p. 7599 - 7602
(2019/07/05)
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- Palladium-Catalyzed Trimethylenemethane Cycloaddition of Olefins Activated by the δ-Electron-Withdrawing Trifluoromethyl Group
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α-Trifluoromethyl-styrenes, trifluoromethyl-enynes, and dienes undergo palladium-catalyzed trimethylenemethane cycloadditions under mild reaction conditions. The trifluoromethyl group serves as a unique δ-electron-withdrawing group for the activation of the olefin toward the cycloaddition. This method allows for the formation of exomethylene cyclopentanes bearing a quaternary center substituted by the trifluoromethyl group, compounds of interest for the pharmaceutical, agrochemical, and materials industries. In the diene series, the cycloaddition operates in a [3 + 4] and/or [3 + 2] manner to give rise to seven- and/or five-membered rings. This transformation greatly improves the scope of the TMM cycloaddition technology and provides invaluable insights into the reaction mechanism.
- Trost, Barry M.,Debien, Laurent
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p. 11606 - 11609
(2015/09/28)
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- Design, synthesis and evaluation of novel hydroxyamides as orally available anticonvulsants
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Themisone, also known as Atrolactamide, was found, in the 1950s, to be a very potent anticonvulsant. It was hypothesized that the -CF3 substitution would maintain the anticonvulsant activity. Anticonvulsant testing of our novel compounds by the
- Schenck, Hilary A.,Lenkowski, Paul W.,Choudhury-Mukherjee, Indrani,Ko, Seong-Hoon,Stables, James P.,Patel, Manoj K.,Brown, Milton L.
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p. 979 - 993
(2007/10/03)
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- Hydration of Trifluoroacetophenone Derivatives as Studied by IR Spectroscopy
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The characteristics of the hydration reaction of four trifluoroacetophenone (L) derivatives were determined by IR spectroscopy.A correlation was found between the position of the O-H band maximum for the hydrated L form and the Hammett constant of the sub
- Bart, T. Ya.,Denisova, A. S.,Karavan, V. S.
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p. 1369 - 1371
(2007/10/02)
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