Utilization of the Intramolecular Cycloaddition−Cationic π-Cyclization of an Isomünchnone Derivative for the Synthesis of (±)-Lycopodine
作者:Albert Padwa、Michael A. Brodney、Joseph P. Marino、Scott M. Sheehan
DOI:10.1021/jo960829p
日期:1997.1.1
chloride in the presence of chlorotrimethylsilane. Ozonolysis of the resulting silyl enol ether followed by a Wittig reaction and conversion to the desired alpha-diazo imide was carried out using standard malonylacylation and diazotization procedures. Treatment of the alpha-diazo imide with rhodium(II) perfluorobutyrate afforded a transient 1,3-dipole which subsequently cycloadded across the tethered pi-bond