Selective activity against Mycobacterium tuberculosis of new quinoxaline 1,4-di-N-oxides
                                
                                    
                                        作者:Esther Vicente、Silvia Pérez-Silanes、Lidia M. Lima、Saioa Ancizu、Asunción Burguete、Beatriz Solano、Raquel Villar、Ignacio Aldana、Antonio Monge                                    
                                    
                                        DOI:10.1016/j.bmc.2008.10.086
                                    
                                    
                                        日期:2009.1
                                    
                                    New series of 3-phenylquinoxaline 1,4-di-N-oxide with selective activity against Mycobacterium tuberculosis have been prepared and evaluated. Thirty-four of the seventy tested compounds showed an MIC value less than 0.2 mu g/mL, a value on the order of the MIC of rifampicin. Furthermore, 45% of the evaluated derivatives showed a good in vitro activity/toxicity ratio. The most active and selective compounds carry a fluorine atom in the quinoxaline 7-position or in the phenyl substituent para-position. In conclusion, the potency, low cytotoxicity and selectivity of these compounds make them valid lead compounds for synthesizing new analogues, particularly compound 7-methyl-3-(4'-fluoro) phenylquinoxaline-2-carbonitrile 1,4-di-N-oxide (MIC <0.2 mu g/mL and SI > 500). (C) 2008 Elsevier Ltd. All rights reserved.