Fig. 5

Asymmetric total synthesis of naucleofficine I and II. The key steps include O-hetero-Diels–Alder cycloaddition, hydroformylation, and double bond isomerization
Asymmetric total synthesis of naucleofficine I and II. The key steps include O-hetero-Diels–Alder cycloaddition, hydroformylation, and double bond isomerization