The Synthesis of Novel Polycyclic Heterocyclic Ring Systems via Photocyclization. 12. Benzo[h]naphtho-[2′,1′:4,5]thieno[2,3-c]quinoline and benzo[f]-naphtho[2′,1′:4,5]thieno[2,3-c]quinoline |
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Authors: | Jiann-Kuan Luo Steven L Castle Raymond N Castle |
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Abstract: | The synthesis of two previously unknown heterocyclic ring systems, namely benzoh]naphtho2′,1′:4,5]thi-eno2,3-c]quinoline (1) and benzof]naphtho2′,1:4,5]thieno2,3-c]quinoline (2) was accomplished via photocyclization of the appropriate amides followed by chlorination and catalytic dechlorination. The total assignment of 1H and 13C nmr spectra of 2 was determined utilizing two-dimensional nmr methods, providing unequivocal structural proof of the two novel polycyclic ring systems. |
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