Highly Efficient Peterson Olefination Leading to Unsaturated Selenoamides and Their Characterization
作者:Toshiaki Murai、Akinori Fujishima、Chigusa Iwamoto、Shinzi Kato
DOI:10.1021/jo034653k
日期:2003.10.1
the products depended on the substituents on the aromatic ring. X-ray molecular analysis disclosed that the alpha,beta,gamma,delta-unsaturated selenoamides had a nearly planar structure. In the (77)Se NMR spectra, signals were observed in the region greater than 130 ppm depending on the substituents on the aromatic ring, whereas the (1)J coupling constant between the carbon atom and the selenium atom
芳族醛与α-甲硅烷基硒乙酰胺的彼得森烯化反应以高立体选择性顺利进行,从而以良好或高收率得到E-α,β-不饱和硒酰胺。与带有烯基和二烯基的醛的反应得到相应的带有二烯基和三烯基的硒酰胺,但是产物的稳定性取决于芳环上的取代基。X射线分子分析表明,α,β,γ,δ-不饱和硒代酰胺具有接近平面的结构。在(77)Se NMR光谱中,根据芳环上的取代基,在大于130 ppm的区域内观察到信号,而碳原子和硒原子之间的(1)J耦合常数几乎与取代基无关。