Trihaloisocyanuric Acid/Triphenylphosphine: An Efficient System for Regioselective Conversion of Epoxides into Vicinal Halohydrins and Vicinal Dihalides under Mild Conditions
作者:Marcio de Mattos、Vitor de Andrade
DOI:10.1055/s-0035-1560408
日期:——
vicinal chloro-/bromohydrins and vicinal dihalides by reaction with the system trihaloisocyanuric acid/triphenylphosphine in acetonitrile under mild and neutral conditions. The reactions proceed smoothly in high yield at room temperature and at reflux, respectively, over a short time. A new synthetic method has been developed for the regioselective conversion of epoxides to vicinal chloro-/bromohydrins
Amino triphenolate tungsten(VI) complexes have been prepared and they proved to be efficient catalysts in haloperoxidation reactions using hydrogen peroxide as a terminal oxidant and inorganic sources of halides. In particular, interesting results have been obtained in the challenging chloroperoxidation reactivity (catalyst loading down to 0.05% with TONs up to 900). A comparison among three different
Use of a fluorous bridge for diffusion controlled uptake of molecular chlorine in chlorine addition to alkenesElectronic supplementary information (ESI) available: experimental. See http://www.rsc.org/suppdata/cc/b3/b305629e/
作者:Jernej Iskra、Stojan Stavber、Marko Zupan
DOI:10.1039/b305629e
日期:——
Fluorous solvent was used for passive transport of molecular chlorine from one side of the U-tube to the other, where addition of chlorine to alkenes was quantitative and diffusion controlled.
氟化溶剂被用于分子氯从U形管一侧到另一侧的被动传输,其中氯加成到烯烃的过程是定量的且受扩散控制。
<i>vic</i>-Dichlorination of Olefins with Sodium Chlorite, Mn(acac)<sub>3</sub>, and Moist Alumina in Dichloromethane
作者:Shigetaka Yakabe、Masao Hirano、Takashi Morimoto
DOI:10.1080/00397919808007018
日期:1998.5
Abstract Aliphatic, alicyclic, and aromatic alkenes underwent smooth vic-dichlorination upon treatment with a reagent combination of NaClO2, Mn(acac)3 catalyst, and chromatographic neutral alumina preloaded with a small amount of water in dichloromethane under mild conditions.