The synthesis of novel polycyclic heterocyclic ring systems via photocyclization. 8 . [1]Benzothieno[2,3‐ c ]naphtho[1,2‐ h ]quinoline and [1]benzothieno[2,3‐ c ]naphtho[1,2‐ h ][1,2,4]triazolo[4,3‐ a ]quinoline

The previously unknown polycyclic heterocyclic ring systems, namely, [1]benzothieno[2,3‐ c ]naphtho[1,2‐ h ]‐quinoline and [1]benzothieno[2,3‐ c ]naphtho[1,2‐ h ][1,2,4]triazolo[4,3‐ a ]quinoline were synthesized via photocyclization of 3‐chloro‐ N ‐(1′‐phenanthryl)benzo[ b ]thiophene‐2‐carboxamide.