The first total synthesis of the natural nematicidal cyclic lipodepsipeptide ophiotine via a convergent strategy that involved both solid-phase peptide synthesis and liquid phase chemistry is reported. The pre-made dipeptide building block was synthesized in the liquid phase, which was then assembled into the peptide backbone through standard Fmoc chemistry on solid support. After cleavage from the resin, the linear peptide was cyclized by the liquid phase macrocyclization and the side chain deprotection successively, which led to the crude ophiotine. Finally, the crude product was purified by preparative reverse-phase highperformance liquid chromatography, and its structure was confirmed by NMR and HR-ESI-MS.
报告了第一例通过包括固相肽合成和液相
化学在内的汇聚策略合成天然神经
杀虫剂环状脂肽类毒素ophiotine的全合成。预先合成的二肽构建块是在液相中合成的,然后通过标准的Fmoc
化学在固体支撑上组装成肽主链。在从
树脂上切割后,线性肽通过液相大环化和侧链去保护相继环化,最终得到粗制的ophiotine。最后,粗产品通过制备性反相高效
液相色谱法进行了纯化,其结构通过NMR和HR-ESI-MS得到了确认。