Formal Synthesis of (+)-Nakadomarin A

The formal synthesis of (+)-nakadomarin A was completed. The significant points of this synthesis are the highly stereoselective formation of the diazatricyclo[6.4.0.0(1,5)]dodecane skeleton (A, B, and D rings) based on the Pauson-Khand reaction and novel furan ring (C ring) formation, using the vinyl residue of the Pauson-Khand product.