Synthesis and identification of some new β-lactam derivatives from 6-amino-1,3-dimethyluracil and study their antioxidant activity

In this work the synthesis of a 6-(amino acetyl chloride)-1,3-dimethylpyrimidine-2,4-dione-6-yl [1] by reaction of 6-amino-1,3-dimethyluracil with chloroacetyl chloride, triethylamine in DMF as a solvent, the product [1] then, reacted with a hydrazine hydrate in absolute ethanol to produce hydrazide derivative [2]. A series of Schiff bases (3-8) were synthesized in moderate yields via a reaction of 6-(hydrazinoacetamide)-1,3-dimethyl pyrimidine-2,4-dione-6-yl [2], substituted aryl aldehydes and glacial acetic acid under reflux conditions. The resulting [3-8] could be useful for the synthesis of [9-26] β-Lactams derivatives. They have been achieved by cyclization of Schiff bases compounds with different reagents (chloroacetyl chloride, phenyl isocyanate and phenyl isothiocyanate) in THF solvent. All newly synthesized compounds conformation were characterized in detail by FT-IR and NMR spectroscopy including 1D NMR experiments (¹H and ¹³C). The study antioxidant of some new compounds.