The synthesis of novel polycyclic heterocyclic ring systems via photocyclization. 9. Phenanthro[9′,10′:4,5]thieno[2,3-c]quinoline,benzo[f]phenanthro[9′,10′:4,5]thieno[2,3-c]quinoline,and benzo[h]-phenanthro[9′,10′:4,5]thieno[2,3-c]quinoline

The synthesis of three novel polycyclic heterocyclic ring systems are reported via photocyclization. The specific final products in these ring systems are: phenanthro9′,10′:4,5]thieno2,3-c]quinoline ( 13 ), benzoh]-phenanthro9′,10′:4,5]thieno2,3-c]quinoline ( 14 ), and benzof]phenanthro9′,10′:4,5]thieno2,3-c]quinoline ( 15 ).