title: A platinum-catalyzed annulation reaction leading to medium-sized rings.
abstract: A platinum-catalyzed domino process with intermediate benzopyrylium cations reaches its optimum utility in the formation of 7- and 8-membered rings. With iron(III) chloride, a tetracyclic product is isolated, derived from an oxidative transformation of a metal-carbene intermediate.
authors.affiliation: Fakultät für Chemie, Ruhr-Universität Bochum, Universitätsstrasse 150, D-44780 Bochum, Germany.
authors.forename: Dirk
authors.initials: D
authors.lastname: Hildebrandt
authors.forename: Wiebke
authors.initials: W
authors.lastname: Hüggenberg
authors.forename: Matthias
authors.initials: M
authors.lastname: Kanthak
authors.forename: Tobias
authors.initials: T
authors.lastname: Plöger
authors.forename: Iris M
authors.initials: IM
authors.lastname: Müller
authors.forename: Gerald
authors.initials: G
authors.lastname: Dyker