Cubanes uncaged: novel carbonium ion rearrangements of pentacyclo[4.3.0.02,5.03,8.04,7]nonan-9-ones (homocubanones) to bicyclo[3.2.1]octa-2,6-diene and tetracyclo[3.3.0.02,6.03,8]octane ring systems
Abstract
Several new and unprecedented carbonium ion rearrangements of the cubyl system are reported.