title: Expedient construction of the vibsanin E core without the use of protecting groups.
abstract: [reaction: see text] The tricyclic core of vibsanin E was constructed without the use of a protecting group in six steps. The El Gaïed Baylis-Hillman variant was key to allowing the Brønsted acid induced tandem cyclization forming rings B and C in one operation.
authors.affiliation: School of Molecular and Microbial Sciences, University of Queensland, St. Lucia, 4072 Queensland, Australia.
authors.forename: Ralf
authors.initials: R
authors.lastname: Heim
authors.forename: Stefan
authors.initials: S
authors.lastname: Wiedemann
authors.forename: Craig M
authors.initials: CM
authors.lastname: Williams
authors.forename: Paul V
authors.initials: PV
authors.lastname: Bernhardt
mesh_terms: D003500:Cyclization; D004224:Diterpenes / Q000138:chemical synthesis* / Q000737:chemistry*; D015394:Molecular Structure; D027925:Viburnum / Q000737:chemistry
chemical_list: D004224:Diterpenes; C506848:vibsanin E