Author's Organization：Institute of Medicinal Chemistry, Hoshi University Institute of Medicinal Chemistry, Hoshi University Institute of Medicinal Chemistry, Hoshi University Institute of Medicinal Chemistry, Hoshi University Institute of Medicinal Chemistry, Hoshi University
The A, B, C-ring system of a triterpene, pollinastanol, was stereoselectively constructed by intramolecular γ-alkylation of the β, γ-unsaturated ketone prepared from the thermal cycloaddition product of a benzocyclobutene derivative as a key reaction.
