A Convenient Synthesis of Some New Bioactive Diheterocylic Thioether and Thiazolopyrimidine Derivatives

Mohamed Abdel-Megid,1,* Mohamed Awas,1 Magdy Seada,1 Kamelia Elmahdy1 and Mortta El-Sayed2

1 Chemistry Department, Faculty of Education, Ain Shams University, Roxy, Cairo, Egypt
2 Environmental Research Laboratory, Theodor Bilharz Research Institute
* Corresponding author: E-mail: mabdelmegid@yahoo.com

2-Carbethoxymethylthiopyrimidinone derivative 1b was utilized for the synthesis of some new diheterocyclic thioethers via its reaction with some acetals followed by cyclization of the products with 2-aminoheterocyclic compounds or through the reaction of 1b with p-tolyldiazonium chloride followed by the reaction of the product with active methylene compounds. Also, some new thiazolopyrimidines were synthesized from 2-mercaptopyrimidine 1a or from 5-pyrimidinylmercaptoacetic acid derivative 1c. The molluscicidal activity of some synthesized compounds towards Biomphalaria alexandrina snails, the intermediate host of Schistosoma mansoni, was investigated.

Keywords: Diheterocyclic thioethers, thiazolopyrimidines, molluscicidal activity.