1-Substituted 7-[3-[(ethylamino)methyl]-1-pyrrolidinyl]-6,8-difluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic acids. New quantitative structure activity relationships at N1 for the quinolone antibacterials
作者:John M. Domagala、Carl L. Heifetz、Marland P. Hutt、Thomas F. Mich、Jeffry B. Nichols、Marjorie Solomon、Donald F. Worth
DOI:10.1021/jm00400a017
日期:1988.5
1-substituted 7-[3-[(ethylamino)methyl]-1- pyrrolidinyl]-6,8-difluoro-1,4-dihydro-4-oxo-3-quinoline- carboxylic acids (N1 analogues of CI-934) were synthesized and evaluated for antibacterial activity and DNA-gyrase inhibition. Correlations between the inhibition of DNA gyrase and antibacterial potency were established. A quantitative structure-activity relationship (QSAR) was derived by using the
一系列18个1-取代的7- [3-[([乙基氨基)甲基] -1-吡咯烷基] -6,8-二氟-1,4-二氢-4-氧代-3-喹啉-羧酸(N1类似物合成CI-934)并评估其抗菌活性和DNA回转酶抑制作用。建立了DNA促旋酶抑制作用与抗菌能力之间的关系。通过使用11种细菌菌株的抗菌能力和革兰氏阴性平均值得出定量构效关系(QSAR)。该方程式表明,抗菌效力在很大程度上取决于STERIMOL的长度和宽度以及N1取代基的不饱和度。一些菌株还显示出对N1组中杂原子(O,N,S)的依赖性。旋回酶抑制与这些参数的组合之间没有发现显着的相关性。结合分子建模研究的构象分析,讨论了这些QSAR结果。在所有方面,最能提高喹诺酮活性的取代基是环丙基。该类似物1-环丙基-7- [3-[([乙基氨基)-甲基] -1-吡咯烷基] -6,8-二氟-1,4-二氢-4-氧代-3-喹啉羧酸(PD 117558),与相关标准相比,在体外和体内均具有出色的广谱活性。