Pyridonecarboxylic Acids as Antibacterial Agents. Part 19. Synthesis and Structure-Antibacterial Activity Relationships of 7-(3-Amino-1-propynyl and 3-Amino-1-propenyl)quinolones.
作者:Masahiro FUJITA、Katsumi CHIBA、Junji NAKANO、Yukio TOMINAGA、Jun-ichi MATSUMOTO
DOI:10.1248/cpb.46.631
日期:——
7-(3-Amino-1-propynyl)-1-cyclopropyl-6, 8-difluoro-1, 4-dihydro-4-oxoquinoline-3-carboxylic acid (7a) and some related compounds (7b-f, 8a, b, 9) were prepared via palladium(0)-catalyzed cross-coupling reaction of 7-iodoquinolone 12 with acetylenic compounds and their antibacterial activity was tested. The methylene homologue (7d) and the N-methyl derivative (7e) of 7a showed essentially the same activity as that of 7a. Addition of methyl group(s) to C'-3 of 7a (giving 7b, c) reduced the activity. The hydrogenation of 7a to (Z)-3-amino-1-propenyl (8a), (E)-3-amino-1-propenyl (8b) and 3-amino-1-propyl (9) compounds retained or enhanced the activity of 7a. Among the compounds prepared, 8a was the most active, but was less active than ciprofloxacin (1). In order to get insight into structure-activity relationships, the spatial distribution of the amino groups of 7a, 8a, b, and 9 was examined by means of computer-aided molecular modeling.
通过钯(0)催化的 7-碘喹啉酮 12 与乙炔类化合物的交叉偶联反应,制备了 7-(3-氨基-1-丙炔基)-1-环丙基-6, 8-二氟-1, 4-二氢-4-氧代喹啉-3-羧酸(7a)和一些相关化合物(7b-f、8a、b、9),并测试了它们的抗菌活性。7a 的亚甲基同族体(7d)和 N-甲基衍生物(7e)显示出与 7a 基本相同的活性。在 7a 的 C'-3 添加甲基(得到 7b、c)会降低其活性。将 7a 氢化为 (Z)-3-氨基-1-丙烯基 (8a)、(E)-3-氨基-1-丙烯基 (8b) 和 3-氨基-1-丙基 (9) 化合物后,保留或增强了 7a 的活性。在制备的化合物中,8a 的活性最高,但活性低于环丙沙星(1)。为了深入了解结构-活性关系,我们通过计算机辅助分子建模的方法研究了 7a、8a、b 和 9 的氨基的空间分布。