Divergent and efficient syntheses of the Lycopodium alkaloids (-)-lycojaponicumin C, (-)-8-deoxyserratinine, (+)-fawcettimine, and (+)-fawcettidine.

Four from one: The four title alkaloids (structures shown in blue box) have been synthesized by using a common versatile intermediate with a 6/5/5 tricyclic skeleton. This tricyclic intermediate could be easily assembled by using an intramolecular carbene addition/cyclization and a Dieckmann condensation/Tsuji-Trost allylation as key steps.