Reactions of Acenaphthylene‐1,2‐quinone Monoxime with Some Phosphorus Ylides. ‐ Synthesis of Acenaphtho [1,2‐ x ]‐Fused Compounds

By applying a Wittig reaction on the monoxime 1 with phosphorus ylide 2 the oximes 3(I,II) are isolated whereas with ylide 5 the pyridine derivative 8 is obtained. Reaction of 1 with the bis‐salt 9 in the presence of lithium ethoxide gives through a Wittig and a “Wittig‐type” reaction the fluoranthene 11 . Hydrogenation of compound 3(I) to oxime 12 and thermal cyclization of the latter leads to the formation of the polycyclic compound 15 .