1346747-14-5Relevant articles and documents
Fluorescence quenching study of moxifloxacin interaction with calf thymus DNA
Lv, Yun-Kai,Li, Pan,Jiao, Miao-Lun,Liu, Bao-Sheng,Yang, Chao
, p. 202 - 209 (2014)
Moxi oxacin (MOX) is a fourth-generation synthetic uoroquinolone antibacterial agent with many important therapeutic properties. Fluorescence quenching was used to study the interaction of MOX with calf thymus DNA (ct- DNA) in aqueous solution. The intercalative binding mode and a static quenching mechanism were conflrmed by the Stern-Volmer quenching rate constant (Kq) of 3.48 × 1011 M-1 s-1 at 298 K. The thermodynamic parameters (δH = -118.4 KJ mol-1 and δS = -299.4 J mol-1 K-1) were calculated at different temperatures, and they indicate that the main forces between MOX and ct-DNA are hydrogen bonding and Van der Waals force. We proved at the same time the presence of one single binding site on ct-DNA, and the binding constant is 1.28 × 105 M-1 at physiological pH. The results may provide a basis for further studies and clinical application of antibiotics drugs. Tubitak.
Nano-Fe3 O4@ZrO2-SO3 H as highly efficient recyclable catalyst for the green synthesis of fluoroquinolones
Nakhaei, Ahmad,Ramezani, Shirin,Shams-Najafi, Sayyed Jalal,Farsinejad, Sadaf
, p. 739 - 746 (2018/09/26)
Nano-Fe3 O4 @ZrO2-SO3 H (n-FZSA), was utilized as a magnetic catalyst for the synthesis of various fluoroquinolone compounds. These compounds were prepared by the direct amination of 7-halo-6-fluoroquinolone-3-carboxylic acids with piperazine derivatives and (4aR,7aR)-octahydro-1H-pyrrolo[3,4-b] pyridine in water. The results showed that n-FZSA exhibited high catalytic activity towards the synthesis of fluoroquinolone derivatives, giving the desired products in high yields. Furthermore, the catalyst was recyclable and could be used at least seven times without any discernible loss in its catalytic activity. Overall, this new catalytic method for the synthesis of fluoroquinolone derivatives provides rapid access to the desired compounds in refluxing water following a simple work-up procedure, and avoids the use of organic solvents.
IR, FT-ICR-MS studies on (1′S, 6′S)-1-cyclopropyl-7-(2,8- diazabicyclo[4.3.0] non-8-yl)-6-fluoro-8-methoxy-4-oxo-1,4-dihydroquinoline-3- carboxylic acid hydrochloride salt
Lin, Zhiwei
, p. 254 - 258 (2013/12/04)
The infrared spectra of (1′S, 6′S)-1-cyclopropyl-7-(2,8- diazabicyclo[4.3.0] non-8-yl)-6-fluoro-8-methoxy-4-oxo-1,4-dihydroquinoline-3- carboxylic acid hydrochloride salt (CLF-HCl) were studied and compared with free base. Their fragmentation pathways were investigated using tandem mass spectrometric (MS/MS) techniques on Fourier-transform ion cyclotron resonance spectrum, and many characteristic fragment ions were found.