The synthesis of novel polycyclic heterocyclic ring systems via photocyclization. 3. 12‐Methylbenzo[h][1]benzothieno[2,3‐c][1,6]naphthyridine
- 1 January 1991
- journal article
- other
- Published by Wiley in Journal of Heterocyclic Chemistry
- Vol. 28 (1) , 203-204
- https://doi.org/10.1002/jhet.5570280135
Abstract
The synthesis of the 12‐methyl derivative of a novel heterocyclic ring system, namely benzo[h][1]benzothieno[2,3‐c][1,6]naphthyridine (8) was prepared by photocyclization of 3‐chloro‐N‐(2′‐methyl‐4′‐quinolyl)benzo‐[6]thiophene‐2‐carboxamide (5) to 12‐methylbenzo[h][1]benzothieno[2,3‐c][1,6]naphthyridin‐6(5H)‐one (6). Chlorination of 6 afforded 6‐chloro‐12‐methylbenzo[h][1]benzothieno[2,3‐c][1,6]naphthyridine (7) which upon dechlorination provided the novel title compound 8.Keywords
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