Toward the total synthesis of maoecrystal V: an intramolecular Diels–Alder route to the maoecrystal V pentacyclic core with the appropriate relative stereochemistry

A diastereoselective route to the maoecrystal V core compound (6) has been achieved. Key transformations include an intramolecular Diels–Alder cyclization and an exo-glycal epoxide rearrangement sequence.