- On the Acetylation of Phenanthrene and 9-Chlorphenanthrene
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Friedel-Crafts acetylation of phenanthrene (1a) in sym-tetrachlorethane yields mixtures of 2-,3- and 9-acetylphenanthrenes (2a,3a,4).The distribution of isomers is found to depend strongly upon the method of mixing the reagents.Acetylation of 9-chlorophenanthrene (1b), perfomed by a variety of methods and solvents, led mainly to 3-acetyl-9-chlorophenanthrene (3b) (>/=85percent).Previously unreported 2-acetyl-9-chlorophenanthrene (2b) was found to form up to a maximum 11percent in nitrobenzene.
- Fernandez, Franco,Gomez, Generosa,Lopez, Carmen,Santos, Ana
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