“…The interaction between tellurium-containing electrophile and N-alkenyl-2-thioxobenzo(thieno)pyrimidine-4-ones was carried out in glacial acetic acid at room temperature. It has been established that during aryltellurobromination of 3-allylquinazoline-2-thione and N-alkenyl thioxo-thieno-pyrimidinones, the annelation of the thiazoline ring takes place, with the formation of a linear condensed system with an exocyclic aryltellurium fragment -hydrobromides of 3-[dibromo(4-ethoxyphenyl)telluromethyl]-2,3-dihydro-5H- [1,3]thiazolo [2,3b]quinazolin-5-one, 2-(dibromo(4-ethoxyphenyl)-telluromethyl)-2,3,6,7,8,9-hexahydro-5Hbenzo [4,5]thieno [2,3-d] [1,3]thiazolo[3,2-a]pyrimidin-5-one and 2-methyl-2-(dibromo(4ethoxyphenyl)-2,3,6,7,8,9-hexahydro-5H-benzo [4,5]thieno [2,3-d] [1,3]thiazolo[3,2-a]pyrimidine-5one. The structure of the products of bromotelluro-cyclization is similar to the structure of products of aryltellurochlorination of the corresponding heterocycles.…”