text: The earliest observation of a cycloheptadiene via the title rearrangement was made by Baeyer in his synthesis of eucarvone from carvone hydrobromide. Mechanistic studies revealed that the rearrangement did indeed proceed via a concerted, Cope-type mechanism.
  In the Eschenmoser synthesis of colchicine, the rearrangement is used to form the seven-membered ring of the target.
  A racemic synthesis of sirenin employs a Wittig reaction to form the key divinylcyclopropane. Hydrogenation of the rearrangement product afforded the target.