Synthesis and biological activity evalution of some new 1,3 – oxazine and 1,3 –thiazinederivedfrom (5-amino-1,3,4-thiadiazole- 2-thiol).

Abstract

The thiosemicarbazid was reacted with carbon disulfide .the result of their reaction was 5- amino 1,3,4 thiadiazol [1] .then the resulted compound was retreated with acetic anhydride to optain 5- mercapto 1,3,4 thiadiazol-2-yl acetamaied [2] to synthese 5 amino 1,3.4 thiadiazole-2- thiol [3]. This compound was allowed to react with aromatic aldehyde in precense of sodium hydroxide the resulted of the reaction -5- (2- amino-4-methyl thio1,3,4 thiadiazol (2H) yl -6- (1,3) oxazine 1,3 thiazine(4-6)(7-12)through reaction with urea and thio urea .the chemical structures of the products were characterized by (FT-IR) and (1H-NMR) (10,11) and melting points apparatus.