著者

石綺 孝義 鈴江 清吾 入倉 勉

出版者

公益社団法人 日本化学会

雑誌

日本化学会誌(化学と工業化学) (ISSN:03694577)

巻号頁・発行日

vol.1985, no.10, pp.2054-2056, 1985-10-10 (Released:2011-05-30)

参考文献数

11

被引用文献数

3

---

Reaction of 2, 3, 4, 5-tetrafluoro-1-nitrobenzene [4] with N-(ethoxycarbonyl)piperazine in aqueous ethanol gave 4-(4-ethoxycarbonyl-1-piperazinyl)-2, 3, 5-trifluoro-1-nitrobenzene [5] in 89% yield, which could be quantitatively converted into its 2-cyclopropylamino derivative [6]. Malonate [7] prepared from [6] and diethyl ethoxymethylenemalonate in 73% yield, was cyclized in the reaction with acetic anhydride and conc. sulfuric acid, accompanying elimination of the nitro group, to give [8] in 41% yield. Saponification of [8] gave quinolonecarboxylic acid [3] which possesses potent antibacterial activity both in vivo and in vitro, in 92% yield.