The first total synthesis of the highly N-methylated acetylene-containing lipopeptide jahanyne, an apoptosis-inducing natural product from marine cyanobacteria, is reported. A late-stage solution-phase coupling enabled introduction of the C-terminal ketone pyrrolidine moiety. A modified Fmoc solid-phase synthesis strategy was adopted to effectively couple multiple sterically hindered N-methylated amino acids while suppressing epimerization. The total synthesis has enabled confirmation of the proposed absolute configuration of natural jahanyne.

中文翻译：

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高N-甲基化乙炔抗癌肽Jahanyne的全合成

报道了高度N-甲基化的乙炔的脂肽jahanyne的首次全合成，这是一种来自海洋蓝细菌的诱导细胞凋亡的天然产物。后期溶液相偶联使得能够引入C-末端酮吡咯烷部分。采用了改良的Fmoc固相合成策略，可以有效地偶联多个空间受阻的N-甲基化氨基酸，同时抑制差向异构化。总的合成已经证实了天然茉莉炔酮的提议的绝对构型的确认。