The Synthesis of Novel Polycyclic Heterocyclic Ring Systems via Photocyclization. 22[1,2]. Dibenzo[f,h]benzothieno[2,3-c]quinoline, Dibenzo[f,h]benzothieno[2,3-c][1,2,4]triazolo[4,3-a]quinoline and Dibenzo[f,h]naphtho[2',1':4,5]thieno[2,3-c]quinoline

摘要

Photocyclization of 3-chloro-N-(9-phenanthryl)benzo[b]-thiophene-2-carboxamide(3)and 3-chloro-N-(9-phenanthryl)-naphtho[1,2-b]thiophene-2-carboxamide(10)yielded dibenzo[f,h]benzothieno[2,3-c]-quinolin-10(9H)-one(4)and dibenzo[f,h]naphtho[2',1':4,5]thieno[2,3-c]quinolin-10(9H)-one(11), respectively. Further elaboration of the lactams provided three novel unsubstituted new ring systems.