The First Successful Base-Promoted Isomerization of Propargyl Amides to Chiral Ynamides. Applications in Ring-Closing Metathesis of Ene−Ynamides and Tandem RCM of Diene−Ynamides
作者:Jian Huang、Hui Xiong、Richard P. Hsung、C. Rameshkumar、Jason A. Mulder、Tyler P. Grebe
DOI:10.1021/ol020097p
日期:2002.7.1
[GRAPHICS]A highly useful sequence of reactions is described here. These reactions consist of the first successful base-induced isomerizations of propargyl amides to chiral ynamides, applications of these novel ynamides in ring-closure metathesis leading to chiral 2-amidodienes useful for Diels-Alder cycloadditions, and the first successful tandem RCM of diene-ynamides.