title: Tandem or sequential coupling-IMDA cycloaddition approach to highly fused polycarbocycles.
abstract: The Diels-Alder cycloadduct made from 3,5-dibromo-2-pyrone and 2-bromo-styrene was successfully transformed stereoselectively into a series of novel benzotetracycles via a tandem or sequential Pd-catalyzed coupling-intramolecular Diels-Alder (IMDA) cycloaddition. The resulting polycarbocycles can be readily converted into a bicyclo[3.3.1]nonane system upon ozonolysis of the internal double bond.
authors.affiliation: Department of Chemistry, Hanyang University, Seoul 131-791, Korea.
authors.forename: Soo-Jin
authors.initials: SJ
authors.lastname: Pang
authors.forename: Soo-Hyun
authors.initials: SH
authors.lastname: Min
authors.forename: Haiwon
authors.initials: H
authors.lastname: Lee
authors.forename: Cheon-Gyu
authors.initials: CG
authors.lastname: Cho