Résumé/Abstract Novel heterocyclic troponoids, such as pyridoimidazotropolones (3-4, 5- 11, 12-13, 14-15 and 16) were synthesized by the reaction of 5-nitrosotropolone (1) with azines as pyridine, m-and p-substituted pyridines, pyridazine, isoquinoline and phthalazine. Similarly, thiazol afforded 17. The reaction mechanism involves multi-step reactions; acetylation of 1, Michael addition of azines to nitrosotropolone acetate (2), cyclization and ...
![[(4,5-dioxocyclohepta-2,6-dien-1-ylidene)amino] acetate Structure](https://image.chemsrc.com/caspic/345/2297-69-0.png)