Pentafulvene for the Synthesis of Complex Natural Products: Total Syntheses of (±)-Pallambins A and B
作者:Christian Ebner、Erick M. Carreira
DOI:10.1002/anie.201505126
日期:2015.9.14
The first totalsyntheses of pallambins A and B are enabled by the use of pentafulvene in an unprecedented Diels–Alder reaction. After elaboration of the adduct through chemoselective cyclopropanation, strategic CH insertion affords the dense tetracyclic core of the naturalproducts. 1,3‐Dipolar cycloaddition and palladium(II)‐catalyzed alkoxycarbonylation were leveraged for the construction of the