Novel bis(napthalic anhydrides) and polyheteroarylenes on their basis

A series of novel bis(naphthalic anhydrides) has been prepared through acenapthene interaction with the dichloroanhydrides of dicarboxylic acids under the conditions of the Friedel‐Crafts reaction or with chloral and bromal followed by oxidation of bis‐acenaphthyls and anhydrization of the tetracarboxylic acids synthesized. Poly(naphthoylene benzoimidazoles) combining advantageous thermal properties and solubility in organic solvents have been obtained through interaction between the synthesized anhydrides and bis(o‐phenylene diamines).