The first biomimetic synthesis of a diterpenoid with the ent-verrucosin A/B skeleton

•The first biomimetic synthesis of a diterpenoid with the ent-verrucosin A/B skeleton has been performed.•The method opens the possibility of synthesis of bioactive diterpenoids possessing this rearranged framework.•The structure and stereochemistry of the synthesized compound have been established on the basis of spectral data.