An efficient synthesis of (±)-panduratin A and (±)-isopanduratin A, inhibitors of dengue-2 viral activity

Panduratin A and its regioisomer isopanduratin A are synthesized in four steps from (E)-ocimene, [(E)-3,7-dimethyl-1,3,6-octatriene] via a Diels–Alder cycloaddition reaction.