Total Synthesis of 7-<i>epi</i>
-Pukalide and 7-Acetylsinumaximol B
作者:Kirsten McAulay、J. Stephen Clark
DOI:10.1002/chem.201702591
日期:2017.7.21
Convergent total syntheses of the furanocembranoids 7‐epi‐pukalide and 7‐acetylsinumaximol B have been achieved using a one‐pot Knoevenagel condensation and thioether‐mediated furan‐forming reaction. Furan formation proceeds via a sulfur ylide and results in rapid introduction of structural complexity during the coupling of two highly functionalised fragments. The targets have been prepared in 16 steps
The highly stereoselective synthesis of a biologically active stagonolide-C has been described. The pivotal functionalities are derived from Barbier allylation, an epoxidation by m-CPBA, a chiral-auxiliary mediated acetate aldol addition, a 1,3-anti-reduction, a Sharpless kinetic resolution, a Yamaguchi macrolactonization, and ring-closing metathesis. (c) 2012 Elsevier Ltd. All rights reserved.