Studies on 8-Methoxyquinolones: Synthesis and Antibacterial Activity of 7-(3-Amino-4-substituted)pyrrolidinyl Derivatives.
作者:Katsuhiro KAWAKAMI、Hisashi TAKAHASHI、Hitoshi OHKI、Kenichi KIMURA、Satoru MIYAUCHI、Rie MIYAUCHI、Makoto TAKEMURA
DOI:10.1248/cpb.48.1667
日期:——
A series of 8-methoxyquinolones bearing 3-amino-4-methylpyrrolidines or 3-amino-4-fluoromethylpyrrolidines at the C-7 position was synthesized and their physicochemical and biological properties were evaluated. All of the compounds synthesized showed more potent activity than LVFX (3) against both gram-positive and - negative bacteria. Increases in lipophilicity of these compounds had desirable effects on their potency of single intravenous toxicity and pharmacokinetic profiles in animals. Among the compounds synthesized, 1-fluorocyclopropyl derivatives 17 and 20, and 7-(cis-3-amino-4-fluoromethylpyrrolidinyl) derivative 19 (DC-756h) showed negative responses in the micronucleus test in mice while 1-cyclopropyl-7-(3-aminopyrrolidinyl) derivative 16 showed a positive response. These results suggested that the introduction of a fluorine atom into the 3-aminopyrrolidinyl substituent resulted in favorable influence on genetic toxicity as well as into the N-1 cyclopropyl substituent.
合成了一系列在C-7位带有3-氨基-4-甲基吡咯烷或3-氨基-4-氟甲基吡咯烷的8-甲氧基喹诺酮类化合物,并评估了它们的物理化学和生物学性质。所有合成的化合物对革兰氏阳性和阴性细菌的活性均比LVFX(3)更强。这些化合物的亲脂性增加对其单一静脉毒性和动物体内的药代动力学特性产生了理想的影响。在合成的化合物中,1-氟环丙基衍生物17和20,以及7-(顺-3-氨基-4-氟甲基吡咯烷基)衍生物19(DC-756h)在小鼠微核试验中显示阴性反应,而1-环丙基-7-(3-氨基吡咯烷基)衍生物16显示阳性反应。这些结果表明,将氟原子引入3-氨基吡咯烷基取代基和N-1环丙基取代基对遗传毒性产生了有利的影