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
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