Five-membered ring annulation via thermal rearrangement of β-cyclopropyl α,β-unsaturated ketones. A formal total synthesis of the sesquiterpenoid (+/-)-zizaene

Article abstract of DOI:10.1139/v82-425

Treatment of the β-iodo enones 7-10 with lithium(phenylthio)cyclopropyl cuprate provided excellent yields of the corresponding β-cyclopropyl α,β-unsaturated ketones 11-14, respectively.When 3-isopropenyl-2-cyclohexen-1-one (16) was allowed to react with d