80054-88-2Relevant academic research and scientific papers
Electrochemical Generation of Hypervalent Bromine(III) Compounds
Francke, Robert,Mohebbati, Nayereh,Sokolovs, Igors,Suna, Edgars
supporting information, p. 15832 - 15837 (2021/06/14)
In sharp contrast to hypervalent iodine(III) compounds, the isoelectronic bromine(III) counterparts have been little studied to date. This knowledge gap is mainly attributed to the difficult-to-control reactivity of λ3-bromanes as well as to their challenging preparation from the highly toxic and corrosive BrF3 precursor. In this context, we present a straightforward and scalable approach to chelation-stabilized λ3-bromanes by anodic oxidation of parent aryl bromides possessing two coordinating hexafluoro-2-hydroxypropanyl substituents. A series of para-substituted λ3-bromanes with remarkably high redox potentials spanning a range from 1.86 V to 2.60 V vs. Ag/AgNO3 was synthesized by the electrochemical method. We demonstrate that the intrinsic reactivity of the bench-stable bromine(III) species can be unlocked by addition of a Lewis or a Br?nsted acid. The synthetic utility of the λ3-bromane activation is exemplified by oxidative C?C, C?N, and C?O bond forming reactions.
Aromatic carboxylic acid trifluoro ethyl ester compound and its preparation method (by machine translation)
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Paragraph 0035-0037; 0045; 0047, (2018/10/04)
Aromatic carboxylic acid trifluoro ethyl ester compound and its preparation method. The present invention provides a kind of aromatic carboxylic acid trifluoroacetate ester compound and its preparation method, the method is that the aromatic carboxylic acid and nitrous acid tert-butyl and 2, 2, 2 - trifluoro ethylamine one-pot synthesis after reaction, to obtain the carboxylic acid trifluoroacetate ester compound. The method is simple in operation, mild reaction conditions, low cost, few by-products, high yield, can be aromatic carboxylic acid trifluoroacetate ester compound, not limited by substrate, in order to establish aromatic carboxylic acid trifluoroacetate ester compound library, for drug screening and new drug synthesis of the raw material sources. (by machine translation)
Direct Esterification of Carboxylic Acids with Perfluorinated Alcohols Mediated by XtalFluor-E
Vandamme, Mathilde,Bouchard, Léa,Gilbert, Audrey,Keita, Massaba,Paquin, Jean-Fran?ois
supporting information, p. 6468 - 6471 (2016/12/23)
The direct esterification of carboxylic acids with perfluorinated alcohols mediated by XtalFluor-E is reported. The corresponding polyfluorinated esters are obtained in moderate to excellent yields with a broad range of carboxylic acids, including aromati
Acid-Catalyzed Reaction of 2,2,2-Trifluorodiazoethane for Analysis of Functional Groups by 19F Nuclear Magnetic Resonance Spectrometry
Koller, K. L.,Dorn, H. C.
, p. 529 - 533 (2007/10/02)
The acid-catalyzed reactions of trifluorodiazoethane with alcohols, phenols, thiols, and carboxylic acids are reported.The yield data for these trifluoroethyl derivatives suggest a simple, and in many cases, quantitative method for introduction of a fluorine tagging group.The 19F chemical shifts indicate that most functional groups (e.g., phenols, alcohols, etc.) have fairly well resolved chemical shifts regions.In addition, paramagnetic shift reagents have been utilized to selectively differentiate carboxylic acids from other active hydrogen functional groups.
