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Manchester M13 9PL 8-Hydroxy-I -naphthyl ketones condense with hydrazine to give 1 H-benzo[de] cinnolines(1 H-I ,2-diazaphenalenes), whose conjugate bases are methylated a t postion 1. The oxime of 8-acetyl-1 -naphthol cyclises to 3rnethylnaphtho[l,8-de] -1.2-oxazine.present ring-c1osure reaction probably require '-proton-Condensations with Hyd,yaziM.--(a) 8-Acetyl-l-naphthol 9The diazaphenalenes (I) and (I1) give red hydrazine hydrate (99-100%; 1 ml.) and then boiled H. Duewell and T.

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