A general procedure of 1,2-dibromination of vicinal sp3 C–H bonds of arylethanes using N-bromosuccinimide as the bromide reagent without an external initiator has been established. The modulation of the strength of the intermolecular noncovalent interactions between the solvent and arylethane ethanes, quantitatively evaluated via quantum chemical calculations, allows us to circumvent the fact that
The Dehalogenation of<i>vic</i>-Dihaloalkanes to Alkenes with Sodium Trithiocarbonate or Sodium Dithiocarbonate in the Presence of Phase-Transfer Catalysts
作者:Akira Sugawara、Atsushi Nakamura、Akitoshi Araki、Ryu Sato
DOI:10.1246/bcsj.62.2739
日期:1989.8
The reductive dehalogenation of vic-dihaloalkanes with aqueous sodium trithiocarbonate or sodium dithiocarbonate in the presence of a phase-transfer catalyst gave the corresponding alkenes in high yields under mild conditions.
<sup>79</sup>Br NMR spectroscopy as a practical tool for kinetic analysis
作者:Si Jia Chan、Andrew G. Howe、James M. Hook、Jason B. Harper
DOI:10.1002/mrc.2401
日期:2009.4
(79)Br NMRspectroscopy has been used to monitor a series of reactions in which the bromide ion is produced, including the Menschutkin reaction of pyridine with a range of substituted benzyl bromides and a Heck coupling process. In cases where the process could also be monitored using (1)H NMRspectroscopy, the kinetic analyses using heteronuclear magnetic resonance spectroscopy were shown to be completely