title: Tetraquinanes via [4 + 4] photocycloaddition/transannular ring closure.
abstract: Intramolecular [4 + 4] photocycloaddition of a furan and a cyclopentane-annulated 2-pyridone yields a cyclooctadiene product with four new stereogenic centers. Transannular ring closure produces the 5-5-5-5 fused ring system of the crinipellins, including three contiguous quaternary carbons, with the correct absolute stereochemistry derived from (-)-carvone.
authors.affiliation: Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, USA.
authors.forename: Peiling
authors.initials: P
authors.lastname: Chen
authors.forename: Patrick J
authors.initials: PJ
authors.lastname: Carroll
authors.forename: Scott McN
authors.initials: SM
authors.lastname: Sieburth