The synthesis of novel polycyclic heterocyclic ring systems via photocyclization. 17. Thieno[3′,2′:4,5]thieno[2,3‐c]naphtho‐[2,1‐f]quinoline and thieno[3′,2′:4,5]thieno[2,3‐c]‐naphtho[1,2‐g]quinoline

Abstract

AbstractThe synthesis of two previously unknown novel polycyclic heterocyclic ring systems via photocyclization is described. The structural assignment of the isomeric ring systems, 4 and 5, was achieved by the total assignment of their 1H and 13C nmr spectra by the concerted usage of two‐dimensional nmr methods.