Abstract

8-Hydroxy-1-naphthaldehyde reacts with hydrazine to give 1H-benzo[de]cinnoline; some reduction to 8-methyl-1-naphthol also takes place. The oxime of 8-hydroxy-1-naphthaldehyde does not cyclise analogously to an oxazine; instead dehydration to the nitrile occurs.

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