Efforts towards ovalicin and fumigillol via a rhodium(I)-catalyzed Alder-ene reaction

ORGN 695

Kay M. Brummond, kbrummon@pitt.edu, Center for Chemical Methodologies and Library Development, Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260 and Jolie E DeForrest, jed20@pitt.edu, Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15216.

Cross-conjugated trienes are an exciting class of compounds that remain largely unexplored by the synthetic community. We have previously shown that cross-conjugated trienes can be obtained through an intramolecular rhodium(I)-catalyzed Alder-ene reaction in high yield. Our current efforts are aimed at exploring the reactivity of these scaffolds in the synthesis of natural products such as ovalicin and fumigillol. We have shown that treating triene A with a vanadium-catalyzed epoxidation protocol selectively produces bis-allylic epoxide B and progress of this diverging approach will be discussed.