Preparation of 4- and 10-fluorobenzo(j)fluoranthene via cyclodehydration of acetals and cyclopropanecarboxaldehydes

Two procedures have been developed for the synthesis of 4-fluorobenzo(j)fluoranthene (4-fluoroBjF) and 10-fluoroBjF. Reaction of 9-fluoro-11H-benzo(a)fluoren-11-one (5) with the Grignard reagent prepared from 2-(2-bromoethyl)-1,3-dioxane provided hydroxyl acetal 6 in quantitative yield. Cyclodehydra...

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