title: High-pressure selectivity studies--a simple route to a homochiral wistarin precursor.
abstract: The cycloaddition of spirobutenolide 3 to the homochiral cyclopentadiene 1 at 6.5 kbar leads exclusively to cycloadduct 5. Subsequent Diels-Alder or Michael additions again favour the cyclohexenone double bond; this perfect chemo- regio- and face selectivity was employed for a short and efficient approach to the wistarin framework.
authors.affiliation: Humanchemie GmbH, Hinter dem Kruge 5 31061 Alfeld, Germany.
authors.forename: Costanze
authors.initials: C
authors.lastname: Knappwost-Gieseke
authors.forename: Frank
authors.initials: F
authors.lastname: Nerenz
authors.forename: Rudolf
authors.initials: R
authors.lastname: Wartchow
authors.forename: Ekkehard
authors.initials: E
authors.lastname: Winterfeldt