Macrocycle ring expansion by double Stevens rearrangement.
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]
Ellis-Holder
Keisha K
KK
Department of Chemistry, University at Buffalo, the State University of New York, Amherst, NY 14260, USA.
Peppers
Brian P
BP
Kovalevsky
Andrei Yu
AY
Diver
Steven T
ST