(1,4-Bis-（4-bromobenzoyl）benzene) as the monomer has been synthesized and characterized by Friedel-Crafts benzoylation reaction.Novel poly（imino ketone）s（PIKs） as high performance polymers have been obtained by the condensation polymerization of（1,4-bis-（4-bromobenzoyl）benzene） and aromatic diamines via palladium-catalyzed aryl amination reaction.The strcture of PIKs is characterized by means of FT-IR and（）1H-NMR spectroscopy,and the results show an agreement with the proposed structure.DSC and TG measurements show that PIKs possess high glass transition temperature（Tg>230℃） and good thermal stability with high decomposition temperatures（TD>500℃）.PIKs also exhibit the excellent solubility,PIK-3 can be dissolved in common organic solvent CHCl3 at room temperature（20℃）.
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