| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 | 
|---|---|---|---|---|
| —— | ethyl 7-azido-1-cyclopropyl-6-fluoro-8-nitro-4-oxo-1,4-dihydroquinoline-3-carboxylate | 905966-59-8 | C15H12FN5O5 | 361.289 | 
| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 | 
|---|---|---|---|---|
| —— | 10-cyclopropyl-5-fluoro-2,3-dimethyl-7-oxo-7,10-dihydropyrido[2,3-f]quinoxaline-8-carboxylic acid | 1122575-47-6 | C17H14FN3O3 | 327.315 | 
| —— | 10-cyclopropyl-5-fluoro-7-oxo-2,3-diphenyl-7,10-dihydropyrido[2,3-f]quinoxaline-8-carboxylic acid | 1122575-48-7 | C27H18FN3O3 | 451.457 | 
| —— | 2,3-di(4-chlorophenyl)-10-cyclopropyl-5-fluoro-7-oxo-7,10-dihydropyrido[2,3-f]quinoxaline-8-carboxylic acid | 1122575-51-2 | C27H16Cl2FN3O3 | 520.347 | 
| —— | 10-cyclopropyl-5-fluoro-7-oxo-2,3-di(p-tolyl)-7,10-dihydropyrido[2,3-f]quinoxaline-8-carboxylic acid | 1122575-52-3 | C29H22FN3O3 | 479.51 | 
| —— | 10-cyclopropyl-5-fluoro-2,3-bis(4-methoxyphenyl)-7-oxo-7,10-dihydro-pyrido[2,3-f]quinoxaline-8-carboxylic acid | 1122575-49-8 | C29H22FN3O5 | 511.509 | 
| —— | 10-cyclopropyl-5-fluoro-2,3-di(pyridin-2-yl)-7-oxo-7,10-dihydropyrido[2,3-f]quinoxaline-8-carboxylic acid | 1122575-55-6 | C25H16FN5O3 | 453.432 | 
| —— | 10-cyclopropyl-5-fluoro-7-oxo-2,3-di(thien-2-yl)-7,10-dihydro-pyrido[2,3-f]quinoxaline-8-carboxylic acid | 1122575-53-4 | C23H14FN3O3S2 | 463.513 | 
Ethyl 7,8-diamino-1-cyclopropyl-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylate (6) and its free acid 7 are prepared by chemical reduction of the respective 7-azido-8-nitroquinoline 5. Consecutive nucleophilic addition and cyclocondensation reactions of 6 with α-acetyl-N-arylhydrazonoyl chlorides 8a - c in ethanol and triethylamine are site-selective and yield the corresponding 3-(aryldiazinyl)- 2-methylpyrido[2,3- f ]quinoxalines 10a - c. Analytical and spectral (IR, MS, NMR) data of 6, 7, and 10a - c are in conformity with the assigned structures.