Rearrangements of Tricyclo[5.3.1.0]undecatrienyl Anion; Chemical Evidence Supporting Cyclopropane Ring Circumambulation of Anionic Species
摘要:
The tricyclic anion 5, generated from the corresponding hydrocarbon 3 with n-BuLi, undergoes the circumambulatory rearrangement at −78 °C to afford the anion 6, which stereoselectively reacts with deuterium oxide at low temperature and undergoes further rearrangements to the stable cyclopentadienyl anion derivative 9 at elevated temperature.