Enantioselective Synthesis of (−)-Exiguolide by Iterative Stereoselective Dioxinone-Directed Prins Cyclizations
作者:Erika A. Crane、Thomas P. Zabawa、Rebecca L. Farmer、Karl A. Scheidt
DOI:10.1002/anie.201102790
日期:2011.9.19
Three become one: The title compound can be prepared in 26 steps by employing a unified Prinscyclization strategy to construct both tetrahydropyran rings (see scheme). The route combines two similar dioxinone fragments and one aldehyde component to generate the core structure. (−)‐Exiguolide selectively inhibits the growth of A549 cancer cells at low concentrations; the triene side chain and the Z‐enoate