Synthesis of the Anti-HIV Agent (−)-Hyperolactone C by Using Oxonium Ylide Formation-Rearrangement
作者:David M. Hodgson、Stanislav Man
DOI:10.1002/chem.201101082
日期:2011.8.22
Starting from readily available (S)‐styrene oxide an asymmetric synthesis is described of the naturally occurring anti‐HIV spirolactone (−)‐hyperolactoneC, which possesses adjacent fully substituted stereocenters. The key step involves a stereocontrolled RhII‐catalysed oxonium ylide formation–[2,3] sigmatropic rearrangement of an α‐diazo‐β‐ketoester bearing allylic ether functionality. From the resulting