Remote intramolecular functionalization of arylnitrenium ions. Seven-membered ring formation
Abstract
Acid-catalysed decomposition of 3′-azido-1,3-dairyl-propane and -propanones leads to 3-amino-6,7-dihydro-5H-dibenzo[a,c]-cycloheptatriene (3) and -cycloheptatrienone derivatives (5) and (9).