Reza moradi valikboni - Academy sciences and Faculty of Chemistry, University of Babolsar, Iran
Naser Gharehbash - Academy sciences and Faculty of science, University of Golestan , Iran
Heshmatollah Alinezhad - Faculty of Chemistry, Mazandaran University, Babolsar, Iran

The main aim of this seminar is,The synthesis derivatives of 2-R 5-oxo 5 -H 6-carboxamide 7-phenyl[1,3,4]thiadiazolo[3,2,-a]pyrimidine are described. These compound exhibit a broad spectrum of antimicrobialaction and can be useful in the search for new antimicrobial drugs.and the same compound have 2-R 5-oxo 5H6- ethyl carboxylate-7-pheny -1,3,4-thiadiazolo[3,2-a] pyramid ine biological and pharmacological properties.

derivatives of 2-R 5-oxo 5-H 6-carboxamide 7-phenyl [1,3,4]thiadiazolo[3,2,-a]pyrimidine ; derivatives of 2-R 5-oxo 5-H 7-phenyl 6- ethyl carboxylate 1,3,4- thiadiazolo [3,2- a]pyrimidine; Multiprocess reaction; 1,3,4-thiadiazolo [3,2- a]pyrimidine