2-Chloro-3-formyl-1,8-naphthyridine (1) has been synthesized in a Vilsmeier-Haack type reaction route. Starting from (1) a number of
novel 1,8-naphthyridines were also synthesized. The structures of synthesized compounds were confirmed by their spectral and physical data.
Some of the newly synthesized compounds exhibited antibacterial activity.
Key words: Novel heterocycles, 1,8-naphthyridine , 1,3,4-oxadiazole, 1,3,4-thiadiazole, 1,2,4-trazole , Vilsmeier-Haack.