How is 4-Phenylazepane (CAS: 73252-01-4) typically synthesized?

4-Phenylazepane is typically synthesized via a multistep process involving the condensation of a primary amine with a chloroarene followed by ring closure. Commonly, this involves the reaction of 2-phenylethanamine with chlorobenzene in the presence of a base like sodium hydroxide, followed by ring closure using a catalyst such as p-toluenesulfonic acid. The yield and selectivity can be improved by optimizing reaction conditions.