In this account, we wish to share some stories behind our 13-step synthesis of the
caged complex diterpenoid atropurpuran. Although our approach might appear to have
proceeded smoothly, the unraveling of the core-construction puzzle and late-stage
decorations was full of drama.
Key words
atropurpuran - diterpenoids - total synthesis - caged natural products - ring-closing
metathesis - Diels–Alder reaction