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The synthesis of novel polycyclic heterocyclic ring systems via photocyclization. 5. [1]Benzothieno[2,3-c]naphtho[2,1-f]-quinoline and [1]benzothieno[2,3-c]naphtho[1,2-g]quinoline

✍ Scribed by Jiann-Kuan Luo; Raymond N. Castle

Book ID: 112130179
Publisher: Journal of Heterocyclic Chemistry
Year: 1991
Tongue: English
Weight: 297 KB
Volume: 28
Category: Article
ISSN: 0022-152X
DOI: 10.1002/jhet.5570280802

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## Abstract A previously unknown heterocyclic ring system, naphtho[2′,1′:4,5]thieno[2,3‐__c__]naphtho[2,1‐__f__]quinoline (**14**), was synthesized __via__ oxidative photocyclization of 3‐chloro‐__N__‐(2‐phenanthryl)naphtho[1,2‐__b__]‐thiophene‐2‐carboxamide (**9**). Further elaboration of the lact

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## Abstract Photocyclization of 3‐chloro‐__N__‐(3‐phenanthryl)naphtho[1,2‐__b__]thiophene‐2‐carboxamide (**12**) furnished only one of the two possible isomers, __i.e.__, naphtho[2′,1′:4,5]thieno[2,3‐__c__]naphtho[1,2‐__f__]quinolin‐6(5__H__)‐one (**13**), which was further elaborated to yield the