Bashar S. Salman - Department of Chemistry, College of Science, Baghdad University, Baghdad, Iraq
Mohammed R. Ahmed - Department of Chemistry, College of Science, Baghdad University, Baghdad, Iraq

The previous effort involved the synthesis of unprecedented Schiff's bases compounds of hydrazine hydrate linked with ethyl ۴-hydroxybenzoate, which in turn reacted with carbon disulfide (CS۲) and potassium hydroxide (KOH) as catalyst to synthesize ۲-marcapto-۱,۳,۴-thiadiazole which reacts with methyl bromoacetate in the presence of triethyl amine N(CH۲CH۳)۳ to form an ester whose methoxy group is converted into a hydrazide, and then reacts with different aromatic aldehydes to form Schiff bases, from which the thiazolidinone and oxazolidinonefive-membered ring heterocyclic compounds' derivatives were formed. All synthetic substances have high yields. The melting points of all compounds and some of their ۱H-NMR and FT-IR spectra, were used to authenticate their identities.

Heterocyclic compounds Thiadiazole ۵-Aryle, ۱, ۳, ۴-thiadiazole Schiff base Oxazolidinone Thiazolidinone