Total Synthesis of Amphidinolide X and Its 12<i>Z</i>-Isomer by Formation of the C12-C13 Trisubstituted Double Bond via Ring-Closing Metathesis
作者:Wei-Min Dai、Jinlong Wu、Yile Chen、Jian Jin、Jianshu Lou、Qiaojun He
DOI:10.1055/s-2008-1077885
日期:——
Amphidinolide X, a 16-membered cytotoxic macrodiolide, and its 12Z-isomer have been synthesized via ring-closing metathesis (RCM) for assembling the C12-C13 trisubstituted double bond. A 29:71 E/Z mixture was obtained from the seco substrate appended with a bulky C8-ODPS group in 50-65% combined yields by using 20 mol% of the second-generation Grubbs initiator and the corresponding indenylidene ruthenium complex. Amphidinolide X and 12Z-isomer exhibit similar cytotoxicity (IC50: 7.6-13.9 µg/mL) against A549, KB, and HL60 cell lines.
一种 16 元细胞毒性大环内酯 Amphidinolide X 及其 12Z 异构体是通过环闭合偏析 (RCM) 合成的,以组装 C12-C13 三取代双键。通过使用 20 摩尔百分率的第二代格拉布斯引发剂和相应的亚茚基钌络合物,从附加了一个笨重的 C8-ODPS 基团的仲底物中获得了 29:71 的 E/Z 混合物,总产率为 50-65%。蚜虫内酯 X 和 12Z 异构体对 A549、KB 和 HL60 细胞株具有相似的细胞毒性(IC50:7.6-13.9 µg/mL)。