Stereoselective synthesis of the C15–C30 subunit of dolabelides A–D†
Abstract
A highly stereoselective synthesis of the C15–C30 subunit of the cytotoxic macrolides dolabelides A–D has been accomplished by utilizing anti selective aldol reaction, Wittig olefination for the introduction of a trisubstituted (E)-double bond, selective hydroboration, Brown asymmetric allylation, Wilkinson hydrogenation and stereoselective keto reduction for the installation of C19 hydroxy group as key steps.