Synthesis and characterization of (4,7- and-1,5-dione ) 1,3- oxazepine derivatives and poly hydrazones

A series of esters (S1- 3)have been prepared from aromatic carboxylic acid by esterification usual manner in the presence of absolute ethanol and concentrated sulfuric acid.The hydrazides (S4-6) preparedthrough reactionof the corresponding esters with hydrazine hydrate in absolute ethanol. The hydrazones(S7-21), prepared by the reaction of hydrazides with different substituted benzaldehydes dissolved in ethanol absolute with drops of glacial acetic acid by thermal refluxing. (4,7- and-1,5-dione ) 1,3- oxazepine derivatives (S22-39) have been prepared through fusion(without using solvent)of hydrazones(S7-15)with malic anhydride and phthalic anhydride.Chelating polymers(S40-45) have been synthesized by the condensation of phenol with hydrazones(S16-21) with formaldehyde in the presence of (KOH) as a catalyst. The prepared compounds were characterized by spectroscopic methods including, (FT-IR) infra-red and (1HNMR) for some prepared compounds , and the reactions were monitored by (TLC) Thin Lyer Chromatography.