title: A cascade cyclization approach to schweinfurthin B.
abstract: [reaction: see text] A strategy for synthesis of the hexahydroxanthene moiety of the natural products schweinfurthin A, B, and D is described. The relative stereochemistry in the key cationic cyclization step is established through the preference of the phenylselenide substituent for an equatorial orientation.
authors.affiliation: Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, USA.
authors.forename: Edward M
authors.initials: EM
authors.lastname: Treadwell
authors.forename: Jeffrey D
authors.initials: JD
authors.lastname: Neighbors
authors.forename: David F
authors.initials: DF
authors.lastname: Wiemer
mesh_terms: D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D015394:Molecular Structure; D013237:Stereoisomerism; D013267:Stilbenes / Q000737:chemistry*
chemical_list: D013267:Stilbenes; C117233:schweinfurthin B