THE SYNTHESIS OF NOVEL POLYCYCLIC HETEROCYCLIC RING-SYSTEMS VIA PHOTOCYCLIZATION .7. [1]BENZOTHIENO[2,3-C]NAPHTHO[2,1-H]QUINOLINE AND [1]BENZOTHIENO[2,3-C]NAPHTHO[2,1-H][1,2,4]TRIAZOLO[4,3-A]QUINOLINE

The synthesis of two novel polycyclic heterocyclic ring systems via photocyclization is described. These are [l]benzothieno[2,3-c]naphtho[2,1-h]quinoline and [1]benzothieno[2,3-c]naphtho[2,1-h][1,2,4]triazolo[4,3-a]-quinoline. In the H-1 nmr spectrum the proton at position 6 is strongly deshielded in the first ring system while the proton at position 6 in the second ring system is shifted considerably upfield while the proton at position 8 in the second ring system is the most deshielded proton in that ring system. The bay regions in both ring systems are severely congested.