Complementary Heterogeneous/Homogeneous Protocols for the Synthesis of Densely Functionalized Benzo[<i>d</i>]sultams: C−C Bond Formation by Intramolecular Nucleophilic Aromatic Fluorine Displacement
from the corresponding open chain (pentafluorobenzene)sulfonamides 4 by complementary solid-liquid phase transfer catalysis (SL-PTC) and homogeneous protocols. The cyclization step proceeds through the intramolecular nucleophilic displacement of an aromatic fluorine atom.