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Synthesis and Characterization of New Symmetrical Pyromellitdiimide Derivatives and Their Amic Acids | ||
| Ibn Al-Haitham Journal For Pure And Applied Science | ||
| Article 1, Volume 24, Issue 3, 2011, Pages 110-121 | ||
| Authors | ||
| J. H. Tomma; K. M. Lazim AL-Aliawy; E. T. Ali | ||
| Abstract | ||
| The new symmetry pyromellitdiimide [VII]a-c,n were synthesized by two-step reactions from the corresponding pyromellitic dianhydride . A new symmetrical amic acid [VI]a-c,n was synthesized by the reaction of pyromellitic dianhydride with different heterocyclic amines in dry acetone . The second reaction step includes intramolecular cyclization of amic acid in the presence of sodium acetate -acetic anhydride system at 850C. Structures of the synthesized compounds have been ascertained by their melting points , C.H.N analysis , UV-Vis, FTIR and 1HNMR spectroscopy. | ||
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