Enantioselective Total Synthesis of the Reported Structures of (−)-9-epi-Presilphiperfolan-1-ol and (−)-Presilphiperfolan-1-ol: Structural Confirmation and Reassignment and Biosynthetic Insights
作者:Allen Y. Hong、Brian M. Stoltz
DOI:10.1002/anie.201205276
日期:2012.9.17
When epi isn't! The first total synthesis of the reported structures of 9‐epi‐presilphiperfolan‐1‐ol and presilphiperfolan‐1‐ol has been achieved. Key steps are a catalytic asymmetric alkylation of a novel diene‐containing electrophile followed by a two‐carbon ring contraction and an intramolecular Diels–Alder cycloaddition to form the stereochemically dense tricyclic core. The synthetic work has resulted
当 Epi 不存在时!已报道的 9- epi -presilphiperfolan-1-ol 和 presilphiperfolan-1-ol结构的首次全合成已实现。关键步骤是新型含二烯亲电子试剂的催化不对称烷基化,然后进行双碳环收缩和分子内狄尔斯-阿尔德环加成,形成立体化学致密的三环核心。合成工作对 presilphiperfolan-1-ol 的结构进行了修改(见方案)。