Cyslabdan was isolated from the culture broth of Streptomyces sp. K04-0144 as a new potentiator of imipenem activity against methicillin-resistant Staphylococcus aureus. We accomplished the synthesis of cyslabdan according to a previously reported structure. However, we subsequently found that this structure was incorrect; our analysis of natural cyslabdan showed that it possessed R stereochemistry at the C8 position, not S, as had previously been reported. Thus, we completed the protecting-group-free synthesis of the correct structure of cyslabdan, which is described herein.
Cyslabdan是从链霉菌K04-0144的培养液中分离得到的一种新型
亚胺培南增效剂,用于对抗
甲氧西林耐药的
金黄色葡萄球菌。我们根据先前报道的结构完成了Cyslabdan的合成。然而,随后我们发现该结构是不正确的;我们对天然Cyslabdan的分析表明,其在C8位置具有R立体
化学构型,而非先前报道的S构型。因此,我们完成了对正确结构的Cyslabdan的无保护基合成,以下将详细描述这一过程。