A series of C-7 thio-substituted 1-cyclopropyl-1, 4-dihydro-4-oxoquinoline-3-carboxylic acids were prepared and tested for their antibacterial activity. Structure-activity relationships associated with the C-5 and C-7 substituents were discussed. Among the C-7 substituents including alkylthio, arylthio, heteroarylthio, and cyclic aminothio groups, a 2-aminoethylthio group was the best for enhancing in vitro antibacterial activity. The C-5 variants increased activity in the order OH
制备并测试了一系列 C-7
硫代 1-环丙基-1,4-二氢-4-氧代
喹啉-3-羧酸的抗菌活性。讨论了与 C-5 和 C-7 取代基相关的结构-活性关系。在 C-7 取代基(包括烷基
硫代、芳基
硫代、杂芳基
硫代和环状
硫代
氨基)中,2-
氨基乙基
硫代最能提高体外抗菌活性。C-5 变体提高活性的顺序为 OH
喹啉-3-羧酸(18)的活性最高。