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
Synthesis and antibacterial activities of new quinolone derivatives utilizing 1-azabicyclo[1.1.0]butane
作者:Yoshifumi Ikee、Kana Hashimoto、Masaaki Nakashima、Kazuhiko Hayashi、Shigeki Sano、Motoo Shiro、Yoshimitsu Nagao
DOI:10.1016/j.bmcl.2006.11.048
日期:2007.2
The ring-opening reactions of 1-azabicyclo[1.1.0]butane 3 with thiols 6a-f gave 3-sulfenylazetidine derivatives 7a-fin 50-92% yields. Treatment of 3 with aromatic amines 11a-e and dibenzylamine 11f in the presence of Mg(CIO4)(2) afforded the corresponding 3-aminoazetidine derivatives 12a-f in 24-53% yields. These azetidine derivatives were introduced into the C7 position of a quinolone nucleus 8 to afford the corresponding fluoroquinolones 9a-f and 13a-f in 21-83% yields. Some of them exhibited superior antibacterial activity against quinolone-susceptible MRSA in comparison with clinically used fluoroquinolones, such as levofloxacin, ciprofloxacin, and gatifloxacin. (c) 2006 Elsevier Ltd. All rights reserved.
NISHIMURA, YOSHIRO;HIROSE, TOHRU;OKADA, HIDETSUGU;SHIBAMORI, KOH-ICHIRO;N+, CHEM. AND PHARM. BULL., 38,(1990) N, C. 2190-2196
作者:NISHIMURA, YOSHIRO、HIROSE, TOHRU、OKADA, HIDETSUGU、SHIBAMORI, KOH-ICHIRO、N+
DOI:——
日期:——
Synthesis of New Quinolone Antibiotics Utilizing Azetidine Derivatives Obtained from 1-Azabicyclo[1.1.0]butane
作者:Yoshifumi Ikee、Kana Hashimoto、Mai Kamino、Masaaki Nakashima、Kazuhiko Hayashi、Shigeki Sano、Motoo Shiro、Yoshimitsu Nagao
DOI:10.1248/cpb.56.346
日期:——
N-Benzyl-3-bromoazetidine (13), which was obtained by the reaction of ABB (3) with benzyl bromide, gave 3-aliphatic amino-substituted azetidine derivatives 15a, b. Novel fluoroquinolones 7a-f, 11a-f, 16a, b and 25a-c were obtained by the introduction of these azetidine derivatives into the C7 position of a quinolone nucleus 6 and N1-heterocyclic quinolones 21a-c in 21-83% yields. Some of them exhibited
通过1-氮杂双环[1.1.0]丁烷(ABB,3)与硫醇4a-f的开环反应以50-92%的产率合成了一系列3-亚磺酰基氮杂环丁烷衍生物5a-f。在Mg(ClO 4)2存在下用芳族胺9a-e和二苄基胺(9f)处理ABB(3)以24-65%的收率得到相应的3-氨基氮杂环丁烷衍生物10a-f。通过ABB(3)与苄基溴反应获得的N-苄基-3-溴氮杂环丁烷(13),得到3-脂族氨基取代的氮杂环丁烷衍生物15a,b。通过将这些氮杂环丁烷衍生物以21-83%的产率引入喹诺酮核6和N1-杂环喹诺酮21a-c的C7位置,获得了新颖的氟喹诺酮类化合物7a-f,11a-f,16a,b和25a-c。
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