Abstract:
The 6-lsopropylidene-1,2,3,4,5-pentamethylbicyclo[3.1.0]hex-3-en-2-yl cation, formed as a result of the rearrangement of4-(4′-methylpent-2′-yn-4′-yl)-1,2,3,4-tetramethylcyclobutenyl cation, shows no tendency to undergo a walk rearrangement but is capable of easy ring-opening to form the corresponding benzyl ion, 2-(2,3,4,5,6-pentamethylphenyl)-2-propyl cation.