2-(naphthalen-1-yl)anilines and p-benzoquinones through copper (II)-mediated radicalcyclisation. This unusual cyclisationreaction resulted in the robust and efficient syntheses of iptycenes with an acridinone motif. These iptycenes can be further transformed to planar acridinone heterocyclics through the Diels–Alder reaction.
TfOH-promoted Classical Nazarov-type Cyclization of Benzofulvenes: Synthesis of Polycyclic 5<i>H</i>,10′<i>H</i>-spiro[benzo[<i>k</i>]phenanthridine-5,6′-dibenzopentalenes]
The reaction of o-benzofulvene with TfOH leads to intramolecular cyclization through novel C–C and C–N bond formation, resulting in the formation of 5H,10′H-spiro[benzo[k]phenanthridine-5,6′-dibenzopentalene]. This protocol provides a new molecular framework with reasonable to excellent yields and tolerates various electron-withdrawing/donating substituents. This method yields diastereoselectivity