Abstract
3-Formylchromone 1 reacts with 3-alkyl-4-amino-5-mercapto-1,2,4-triazole, 2a-2c to give 3-(3-alkyl-5-mercapto-1,2,4-triazolyliminomethyl) chromones, 3a-3c. On refluxing in nitrobenzene for 6 h, 3a-3c afforded 2- (4-oxo-4H- [1] benzopyran-3-yl) [1] benzopyrano [3, 2-e] pyrimidin-5 (5H)- one 4 and 1-(4-oxo-4H- [1] benzopyran-3-yl) [1] benzopyrano [3,2-d] pyridazin-5 (5H)- one 5. The compounds have been tested for their antibacterial and antifungal activities.