3377-86-4Relevant articles and documents
An Unusually Mild and Selective Bromination of Some n-Alkanes with Barium Tetrafluorobromate
Sobolev,Ostvald,Zherin,Shushpanova,Filimonov
, p. 297 - 299 (2021/03/26)
Abstract: Barium tetrafluorobromate Ba(BrF4)2 is a brominating agent for hexane, octane, and decane. The reaction occurs under very mild conditions at –25 to –20°C and results in preferential formation of 2-bromoalkanes.
Catalytic Bromination of Alkyl sp3C-H Bonds with KBr/Air under Visible Light
Zhao, Mengdi,Lu, Wenjun
supporting information, p. 5264 - 5267 (2018/09/12)
Alkyl sp3C-H bonds of cycloalkanes and functional branch/linear alkanes have been successfully brominated with KBr using air or O2 as an oxidant at room temperature to 40 °C. The reactions are carried out in the presence of catalytic NaNO2 in 37% HCl (aq)/solvent under visible light, combining aerobic oxidations and photochemical radical processes. For various alkane substrates, CF3CH2OH, CHCl3, or CH2Cl2 is employed as an organic solvent, respectively, to enhance the efficiency of bromination.
Tetrabutylphosphonium Bromide Catalyzed Dehydration of Diols to Dienes and Its Application in the Biobased Production of Butadiene
Stalpaert, Maxime,Cirujano, Francisco G.,De Vos, Dirk E.
, p. 5802 - 5809 (2017/09/15)
We report the use of the ionic liquid tetrabutylphosphonium bromide as a solvent and catalyst for dehydration of diols to conjugated dienes. This system combines stability, high reaction rates, and easy product separation. A reaction mechanism for the model compound 1,2-hexanediol is proposed and experimentally corroborated. This particular mechanism allows for the selective formation of conjugated dienes, in contrast with purely acidic catalysis. Next, the reaction is also performed on various other diols. As a first application, we assessed the biobased production of 1,3-butadiene. With 1,4-butanediol as the starting material, a 94% yield of butadiene was reached at 100% conversion.
