Process for producing condensed bromoacenaphthylene

摘要

Process for producing condensed bromoacenaphthylene comprising: (A) a step of brominating and condensating acenaphthene with bromine in a halogenated hydrocarbon solvent in the presence of a Lewis acid catalyst; (B) a step of removing the Lewis acid catalyst and then continuing the bromination with bromine with an added radical initiator; and (C) a step of carrying out dehydrobromination reaction. In a modified process, the bromination is effected in a halogenated hydrocarbon solvent at a temperature not lower than 60 DEG C. using bromine at least 3 times as much in moles as acenaphthene in the presence of an iron catalyst. Further, the condensed bromoacenaphthylene is purified by bringing it into contact with an adsorbent in an organic solvent.