Piperazine → 6-Chloro-1-cyclopropyl-8-fluoro-1,4-dihydro-4-oxo-7-(1-piperazinyl)-3-quinolinecarboxylic acid
반응식
[Cl:1][C:2]1[CH:3]=[C:4]2[C:9](=[C:10]([F:13])[C:11]=1F)[N:8]([CH:14]1[CH2:16][CH2:15]1)[CH:7]=[C:6]([C:17]([OH:19])=[O:18])[C:5]2=[O:20].[NH:21]1[CH2:26][CH2:25][NH:24][CH2:23][CH2:22]1>N1C=CC=CC=1>[Cl:1][C:2]1[CH:3]=[C:4]2[C:9](=[C:10]([F:13])[C:11]=1[N:21]1[CH2:26][CH2:25][NH:24][CH2:23][CH2:22]1)[N:8]([CH:14]1[CH2:16][CH2:15]1)[CH:7]=[C:6]([C:17]([OH:19])=[O:18])[C:5]2=[O:20]참가 물질
4
실험 절차
12 g (40 mmoles) of the product from Example A are heated under reflux in 100 ml of pyridine with 17.2 g (0.2 mole) of piperazine for 5 hours. The mixture is concentrated in vacuo, the residue is stirred with 120 ml of water and the mixture is brought to 5 with 2N hydrochloric acid. The precipitate is filtered off with suction, washed with methanol and water, boiled up in 80 ml of methanol and dried. 12.3 g (84% of theory) of 6-chloro-1-cyclopropyl-8-fluoro-1,4-dihydro-4-oxo-7-(1-piperazinyl)-3-quinolinecarboxylic acid of melting point 295°-298° C. (with decomposition) are obtained.