One step synthesis of highly functionalized thiazolo[3,2-b][1,2,4]triazole, triazolo[1,5-a] pyrimidine and triazolo[3,4-b][1,3,4]thiadiazine

An efficient and straightforward methodology for the preparation of novel functionalized thiazolo[3,2-b]triazole, triazolo[1,5-a]pyrimidine and triazolo[3,4-b][1,3,4]thiadiazine has been implemented with excellent yields via a one-pot catalyst-free procedure at room temperature by the reaction of dibenzoylacetylene and triazole derivatives. Single crystal X-ray diffraction has been established for structures 21, 24, 25, 27, 34, 36 and 41.