4-Phenylazepane, also known as phenazepane, is a derivative of the cyclic amine azepane. It is a structural moiety in a series of opioid analgesics, including:
Ethoheptazine Metheptazine Metethoheptazine Proheptazine
However these materials are not prepared from 4-phenylazepane itself. The molecule itself is chiral at the 4-position.
See also 4-Phenylpiperidine Azepane