Acephenanthrylene

Acephenanthrylene is a tetracyclic polycyclic aromatic hydrocarbon.

Properties and occurrence
Acephenanthrylene is one of the polycyclic aromatic hydrocarbons formed in combustion of various fuels. However, it is not present as an atmospheric pollutant because its vinylic bridge makes it susceptible to photolytic oxidation once released into the atmosphere.

Preparation
Acephenanthrylene has been prepared in 4 steps starting with cyclization of 4-(5-acenapthenyl)butyric acid.