Total Synthesis of (±)-Cycloclavine and (±)-5-<i>epi</i>-Cycloclavine
作者:Filip R. Petronijevic、Peter Wipf
DOI:10.1021/ja2026882
日期:2011.5.25
indole alkaloid cycloclavine and its unnatural C(5)-epimer are described. Key features include the rapid construction of the heterocyclic core segments by two Diels-Alderreactions. An indole annulation was accomplished by a late-stage intramolecular Diels-Alder furan cycloaddition, and a methylenecyclopropane dienophile was used for a stereoselective intramolecular [4 + 2] cycloaddition to give the c