Periconansons C⁃F is a natural product of cytochalasin. Its structure contains a six and six bicyclic skeleton. We think that we can complete the construction of this skeleton structure through one⁃step D⁃A reaction. We synthesized its key D⁃A reaction intermediate.KF is used as base and O2 is used as oxidant to oxidize the required hydroxyl group. After the intramolecular D⁃A reaction, it is possible to complete the total synthesis of four molecules, such as percoannosins C-F.