<P> The Haworth reaction is a classic method for the synthesis of 1 - tetralone . In it benzene is reacted with succinic anhydride, the intermediate product is reduced and a second FC acylation takes place with addition of acid . </P> <P> In a related reaction, phenanthrene is synthesized from naphthalene and succinic anhydride in a series of steps . </P> <P> Reaction of chloroform with aromatic compounds using an aluminium chloride catalyst gives triarylmethanes, which are often brightly colored, as is the case in triarylmethane dyes . This is a bench test for aromatic compounds . </P>

In the friedel crafts acylation reaction aluminum chloride functions as a