Roach, Paul Warmuth, Ralf The room-temperature stabilization of bicyclo[2.2.2]oct-1-ene and bicyclo[3.2.1]oct-1-ene Retardation through incarceration: The highly strained anti-Bredt bridgehead olefin bicyclo[2.2.2]oct-1-ene (1) is remarkably stable at 60 °C, if generated photochemically inside the hemicarcerand 2. The surrounding host not only prevents the dimerization of 1, but also retards strongly its intramolecular retro-Diels–Alder reaction by several orders of magnitude. Carbenes;Hemicarcerands;Host–guest systems;Ring expansion;Strained molecules;Chemical Sciences not elsewhere classified 2017-06-12
    https://repository.lboro.ac.uk/articles/journal_contribution/The_room-temperature_stabilization_of_bicyclo_2_2_2_oct-1-ene_and_bicyclo_3_2_1_oct-1-ene/9394892