Adamantanoid dienones from intramolecular Ar16-participation
Abstract
Heating the phenolic iodide (14) with potassium t-butoxide and t-butyl alcohol in a sealed tube gave the phenolic dienone (6) or the adamantanoid dienone (18a) depending on the quantity of potassium t-butoxide used. Treatment of (18a) with DDQ gives the adamantanoid bis-dienone (17), which fails to undergo the dienone–phenol rearrangement in the presence of trifluoracetic acid.