181187-55-3Relevant academic research and scientific papers
Practical regioselective method for (E)-enol ehter
Park, Hyeung-Geun,Kim, Dong-Hwa,You, Misuk,Park, Mi-Kyoung,Jew, Sang-Sup
, p. 4579 - 4582 (2007/10/03)
A new practical and highly regioselective synthetic method for (E)-enol ether is reported. (E)-enol ethers (E:Z = 93:7-99:1) were prepared from the corresponding enol acetates (E:Z?3:1) in two steps by bromination and anti- elimination of α-bromodialkylac
17O NMR spectra of divinyl ethers
Taskinen, Esko
, p. 107 - 110 (2007/10/03)
The 17O NMR spectra of a number of alkyl- and phenyl-substituted divinyl ethers were recorded in CDCl3 solution. The relationship between chemical shift and the number, nature and position of substituents was explored. The shift values, falling in the range δ 100-140 ppm, were found to be remarkably insensitive to the electronic and stereochemical effects of substituents. The narrow range of chemical shifts is likely to arise from the ability of the O atoms of divinyl ethers to share p-π conjugation with the two olefinic linkages: reduced conjugation with one vinyl group may lead to enhanced conjugation with the other.
