结构复杂的震颤吲哚生物碱 (-)-penitrem D (4) 的收敛、立体控制全合成已经实现。合成的亮点包括对西半球的高效、不对称合成;I形环的立体控制组装;发现了一种新的自动氧化,以引入震颤活动所需的 C(22) 叔羟基;充分阐述了东半球和西半球的联盟,利用专门为此目的制定的吲哚合成协议;以及利用 Sc(OTf)(3-) 促进的反应级联的 A 和 F 环的后期立体选择性构建。导致 (-)-penitrem D (4) 的最长线性序列为 43 步。
[structure: see text] The totalsynthesis of (-)-21-isopentenylpaxilline (1) has been achieved. Key elements of the synthesis include the stereocontrolledconstruction of the advanced eastern hemisphere (-)-5, a highly efficient union of the eastern and western fragments (-)-5 and 4, respectively, exploiting our 2-substituted indole synthesis, and a new protocol for the construction of ring C.