Polycyclic N-hetero compounds. IX. Reactions of tetralones with formamide or trisformylaminomethane.

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Condensation of 1-tetralone (I) with trisformylaminomethane gave 5, 6-dihydrobenzo- [h] quinazoline (II) which was dehydrogenated with sulfur to benzo [h] quinazoline (III). Condensation of 2-tetralone (IV) with formamide or trisformylaminomethane gave 5, 6-dihydrobenzo [f] quinazoline (V) which was dehydrogenated with sulfur to benzo [f] quinazoline (VI).

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