4‐pentadienale 3a–f werden aus den 3‐Phenyl‐propenal‐diethylacetalen la–f und Ethylvinylether dargestellt und ihre Oxime 4a–f in die (E)‐ und (Z)‐Isomere getrennt. Beim Einsatz der α‐verzweigten 5‐Phenyl‐2,4‐pentadienale 5a–d, die durch Aldolkondensation gewonnen werden, sind die einheitlichen (E)‐Oxime 6a–d zu erhalten.
<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