A Practical and Facile Synthesis of Azetidine Derivatives for Oral Carbapenem, L-084
作者:Takeshi Isoda、Itsuki Yamamura、Satoshi Tamai、Toshio Kumagai、Yoshimitsu Nagao
DOI:10.1248/cpb.54.1408
日期:——
An orally active carbapenem L-084, which exhibits high bioavailability in humans, has a 1-(1,3-thiazolin-2-yl)azetidin-3-ylthio moiety at the C-2 position of the 1β-methylcarbapenem skeleton. We established a practical and cost-effective synthesis of 3-mercapto-1-(1,3-thiazolin-2-yl)azetidine (1) for further scale-up production of L-084. This synthesis method entails an industry-oriented reaction of azetidine ring-closure to yield N-benzyl-3-hydroxyazetidine (16), which is eventually converted to 1 via key intermediates, Bunte salts 19 and 20.
口服活性碳青霉烯类药物 L-084 在人体中具有很高的生物利用度,其 1β 甲基碳青霉烯类药物骨架的 C-2 位上有一个 1-(1,3-噻唑啉-2-基)氮杂环丁烷-3-基硫基。为了进一步扩大 L-084 的生产规模,我们建立了一种实用且具有成本效益的 3-巯基-1-(1,3-噻唑啉-2-基)氮杂环丁烷(1)合成方法。这种合成方法需要进行氮杂环丁烷环闭的工业化反应,生成 N-苄基-3-羟基氮杂环丁烷 (16),并最终通过关键中间体 Bunte 盐 19 和 20 转化为 1。