title: Tethered 2 + 2 + 2 cycloaddition reactions of cobalt-cycloheptyne complexes.
abstract: Cycloheptyne-dicobalt hexacarbonyl complexes, substituted by propargylic ether functions, undergo 2 + 2 + 2 cycloaddition reactions with alkynes to give tricyclic benzocycloheptanes; an all-intramolecular version of this transformation is also possible.
authors.affiliation: Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON N9B 3P4, Canada.
authors.forename: Ahmed B
authors.initials: AB
authors.lastname: Mohamed
authors.forename: James R
authors.initials: JR
authors.lastname: Green