Revisiting a Classic Approach to the <i>Aspidosperma</i> Alkaloids: An Intramolecular Schmidt Reaction Mediated Synthesis of (+)-Aspidospermidine
作者:Rajesh Iyengar、Klaas Schildknegt、Martha Morton、Jeffrey Aubé
DOI:10.1021/jo051212n
日期:2005.12.1
A total synthesis of (+)-aspidospermidine (1) is described. The key reactions used in the synthesis of this pentacyclic Aspidosperma alkaloid were a deracemizing imine alkylation/Robinson annulation sequence, a selective “redox ketalization”, and an intramolecular Schmidt reaction. A Fischer indolization step carried out on a tricyclic ketone mirrored the sequence reported by Stork and Dolfini in their
描述了(+)-aspidospermidine(1)的全合成。该五环曲霉植物生物碱的合成中使用的关键反应是脱亚胺亚胺烷基化/鲁宾逊环化序列,选择性“氧化还原缩酮化”和分子内施密特反应。在三环酮上进行的Fischer吲哚化步骤反映了Stork和Dolfini报告的经典天冬子胺合成过程中的序列。