title: Synthesis of the Cyclohepta[e]hydrindane Core of the Marine Homoverrucosane Diterpenoid Gagunin E.
abstract: The synthesis of the A-B-cis B-C-trans annulated cyclohepta[e]hydrindane core of gagunin E with a fully elaborated B-C ring segment has been achieved. Using an adaptable A ring building block, the B ring was annulated by (4 + 2)-cycloaddition and the C ring by ring-closing metathesis. The angular methyl groups were attached by electrophilic cyclopropanation-ring opening.
authors.affiliation: Fakultät für Chemie und Chemische Biologie, Technische Universität Dortmund , 44227 Dortmund, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Schäfer
authors.affiliation: Fakultät für Chemie und Chemische Biologie, Technische Universität Dortmund , 44227 Dortmund, Germany.
authors.forename: Martin
authors.identifier: 0000-0003-4743-5733
authors.initials: M
authors.lastname: Hiersemann