Synthesis of Polycyclic Quinazolinones through C(sp3)−H Functionalization of Inert Alkanes or Visible‐Light‐Promoted Oxidation Decarboxylation of N‐Hydroxyphthalimide Esters

Abstract Two novel C(sp 3 )−H functionalization of inert alkanes and visible‐light promoted oxidation decarboxylation of N ‐hydroxyphthalimide (NHP) esters to access polycyclic quinazolinones have been described. These methods do not involve metal catalysts and are carried out in water or water/DMSO media. The wide substrate scope, even including the seven‐membered ring under mild reaction conditions, demonstrate the practicability of these strategies.