Some 4-ethyl-1 (2)-R-1 (2) H-4, 7-dihydro-triazolo [4, 5-h]-quinolin-7-one-6-carboxylic acids were prepared as novel analogues of oxolinic acid, in order to discover the influence of the annelation position of the triazole ring on the antimicrobial activity that, in some isomers triazolo [4, 5-f] quinoline carboxylic acids, is selective against Escherichia coli. Some interesting side reactions in the cyclization of 1 (2)-R-1 (2) H-benzotriazol-4-yl- ...
![ethyl 9-ethyl-6-oxo-6H,9H-[1,2,3]triazolo[4,5-h]quinoline-7-carboxylate Structure](https://image.chemsrc.com/caspic/362/145548-81-8.png)
![diethyl 2-(((1H-benzo[d][1,2,3]triazol-4-yl)(ethyl)amino)methylene)malonate Structure](https://image.chemsrc.com/caspic/086/145548-66-9.png)
