title: Macrocycle ring expansion by double Stevens rearrangement.
abstract: New benzimidazolidinone cyclophanes were synthesized through a double Stevens rearrangement employed as a ring expansion technique. Para-substituted heterophanes underwent efficient rearrangement. Meta-substituted heterophanes were also prepared. Structure analyses of the new cyclophanes are also provided. [reaction: see text]
authors.affiliation: Department of Chemistry, University at Buffalo, the State University of New York, Amherst, NY 14260, USA.
authors.forename: Keisha K
authors.initials: KK
authors.lastname: Ellis-Holder
authors.forename: Brian P
authors.initials: BP
authors.lastname: Peppers
authors.forename: Andrei Yu
authors.initials: AY
authors.lastname: Kovalevsky
authors.forename: Steven T
authors.initials: ST
authors.lastname: Diver