Total Synthesis of Eupomatilones 4 and 6: Structurally Rearranged and Atropisomerically Fluxional Lignan Natural Products

Abstract
A convergent and diastereocontrolled total synthesis of eupomatilones 4 and 6 is reported and was based on a diastereoselective hydroboration/oxidation sequence and a convergent Lipshutz biarylcuprate cross-coupling reaction. The structure of eupomatilone 6 is revised.