Fig. 14. Visible light mediated EnT dearomative intermolecular [4π + 2π] cycloaddition of (A) quinolines with olefins using Lewis acid and HFIP solvent, (B) quinoline with disubstituted olefins using TfOH, (C) quinolines with disubstituted olefins and allene usings lewis acid, and (D) lepidine with olefins using CF₃CO₂H.