title: Intramolecular [2 + 2]-photocycloaddition/thermal fragmentation approach toward 5-8-5 ring systems.
abstract: [reaction: see text]. An intramolecular [2 + 2]-photocycloaddition is used to provide a photoadduct, which upon fragmentation, lactone cleavage, and subsequent Cope rearrangement provides a dicyclopenta[a,d]cyclooctene ring system with substituents in place (e.g., C3 and C11) to access several 5-8-5 diterpene and sesterterpene natural products.
authors.affiliation: Eugene F. Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467-3860, USA.
authors.forename: P C
authors.initials: PC
authors.lastname: Lo
authors.forename: M L
authors.initials: ML
authors.lastname: Snapper