Synthesis and catalytic dehydrocyclization of 2- and 3-butylphenanthrenes

Abstract

1. An investigation was made of the catalytic dehydrocyclization of 2- and 3-butylphenanthrenes over alumina-chromia and platinum catalysts. 2. The only cyclization product formed from 2- and 3-butylphenanthrenes over an alumina-chromia catalyst at 450° is chrysene; the reaction described can serve as a method for the synthesis of chrysene. 3. In presence of platinized charcoal at 350°, the dehydrocyclization of butylphenanthrenes does not go.