It is well known that the thiadiazole nucleus possesses interesting biological properties such as antimicrobial, 1–3 antiinflammatory, 4–6 antituberculosis, 7 antihypertensive, 8, 9 and anticancer10 activities. Furthermore, the triazole nucleus11–13 and the pyridine14 unit have attracted special attention from chemists due to their attractive biological activities. Incorporating a pyridine ring into active compounds sometimes improves their biological ...