Pyridonecarboxylic Acids as Antibacterial Agents Part XVII. 5-Alkoxyimidazoquinolones as Potential Antibacterial Agents. Synthesis and Structure-Activity Relationships.
作者:Masahiro FUJITA、Hiroshi EGAWA、Teruyuki MIYAMOTO、Junji NAKANO、Jun-ichi MATSUMOTO
DOI:10.1248/cpb.44.987
日期:——
4-Substituted 6-cyclopropyl-6, 9-dihydro-5-methoxy-9-oxo-1H-imidazo[4, 5-f]quinoline-8-carboxylic acids (6) and 8-substituted 1, 5, 6, 11-tetrahydro-5-methyl-1-oxo-imidazo[4, 5-g]pyrido[1, 2, 3-de][1, 4]benzoxazine-2-carboxylic acids (7) were prepared as potential antibacterial quinolone derivatives. The appendages at C-4 of -6 and at C-8 of -7 were selected from 1-piperazinyl, 4-methylpiperazinyl, 3-aminopyrrolidinyl, and 3-aminomethylpyrrolidinyl groups. The 5-methoxyimidazoquinolones 6 were superior to the corresponding ofloxacin type analogues 7 in in vitro antibacterial activity. The activity of 6 was equipotent against S. aureus, but 2 to 16 times less potent against E. coli and P. aeruginosa compared to that of the 5-fluoro analogue 3.
4-取代的6-环丙基-6,9-二氢-5-甲氧基-9-氧代-1H-咪唑并[4,5-f]喹啉-8-羧酸(6)和8-取代的1,5,6,11-四氢-5-甲基-1-氧代-咪唑并[4,5-g]吡啶并[1,2,3-de][1,4]苯并噁嗪-2-羧酸(7)被制备为潜在的抗菌喹诺酮衍生物。-6的C-4和-7的C-8的附属物分别选自1-哌嗪基、4-甲基哌嗪基、3-氨基吡咯烷基和3-氨基甲基吡咯烷基。5-甲氧基咪唑喹诺酮6在体外抗菌活性方面优于相应的氧氟沙星类类似物7。6对金黄色葡萄球菌的活性与5-氟类似物3相当,但对大肠杆菌和铜绿假单胞菌的活性则比5-氟类似物3低2至16倍。