Novel aromatic poly(ether ketone)s. Part 3.—Synthesis of diamine precursors with 4–8 benzene rings linked by ether, ketone and sulfone groups

Abstract

Fourteen new diamines have been synthesized for use in the work described in parts 1 and 2. A combination of Friedel–Crafts acylation of arenes with nitro- and fluoro-benzoyl chlorides and benzene dicarbonyl chlorides, Ullmann synthesis of aryl ethers from phenols and fluoroarenes and reduction of nitro to amino groups by transfer hydrogenation has been employed.