作者:Mukund P. Sibi、Drew Rutherford、Paul A. Renhowe、Biqin Li
DOI:10.1021/ja9906249
日期:1999.8.1
good to excellent yields (74−89%) and, in some cases, provides excellent stereocontrol of the new double bond. The geometry of the newly formed double bond is influenced by the nature of the aldehyde and reaction conditions. The trends in olefin configuration are discussed. Application of this methodology allows for easy preparation of molecules containing double bonds allylic to nitrogen, including oxazolidinones
亲核合成子 (S)-(+)-4-(2-oxazolidonyl)-methyltriphenylphoshinyl iodide 6,可从 l-丝氨酸中分五步获得(总产率为 52%),与醛反应生成良好至极好的烯烃产率 (74-89%),并且在某些情况下,对新双键提供出色的立体控制。新形成的双键的几何形状受醛的性质和反应条件的影响。讨论了烯烃构型的趋势。应用这种方法可以轻松制备含有烯丙基氮双键的分子,包括恶唑烷酮和 β,γ-不饱和氨基醇。几种不饱和恶唑烷酮以高产率(75% 至 90%)转化为 β,γ-不饱和氨基醇。