In this work new heterocyclic derivatives were prepared. The most available (Sulfadiazine) compound treated with different aromatic aldehydes to synthesis (F1-F5) imine derivatives then cycloaddition reaction of imines with phenylthioacetic acid to produced azetidin-2-one derivatives(F6,F7). compound F1 treated ethylene glycol and hydrazine to get (F8) . (F9,F10) compounds has been synthesis by re...