4, 5-Disubstituted 6-cyclopropyl-6, 9-dihydro-9-oxo-1H-imidazo- (30-32) and triazolo[4, 5-f]quinoline-8-carboxylic acids (33-35) were synthesized starting from 5, 6-diaminoquinolones 25. The imidazoquinolones 30-32 were equal or superior to the corresponding triazoloquinolone analogues 33-35 in in vitro antibacterial activity. As for the C-5 substituents, a fluorine atom was the most favorable of the three groups, H, F, and Cl. Among the compounds prepared, 4-(cyclic amino)-5-fluoro-imidazoquinolones 31a-d showed potent and well-balanced antibacterial activity against both gram-positive and gram-negative bacteria. Structure-activity relationships for the C-4 substituents (cyclic amino groups) were also examined in detail.
合成了4, 5-二取代的6-环丙基-6, 9-二氢-9-氧代-
1H-咪唑-(30-32)和三唑并[4, 5-f]
喹啉-8-羧酸(33-35)从5, 6-二
氨基
喹诺酮25开始。
咪唑并
喹诺酮30-32的体外抗菌活性等于或优于相应的三唑并喹诺
酮类似物33-35。至于C-5取代基,
氟原子是H、F和Cl这三个基团中最有利的。在制备的化合物中,4-(环
氨基)-5-
氟-
咪唑并
喹诺酮31a-d对革兰氏阳性菌和革兰氏阴性菌均表现出有效且均衡的抗菌活性。还详细研究了 C-4 取代基(环状
氨基)的结构-活性关系。