 by intramolecular Pd-catalyzed *N*-arylation.](molecules-00-00000-sch000){#molecules-00-00000-sch000}  ![Synthesis of 0-membered *N*-heterocycle by intramolecular Pd-catalyzed *N*-arylation.](molecules-00-00000-sch000){#molecules-00-00000-sch000}  ![Synthesis of 0-membered *N*,*