Total Synthesis of Antascomicin B

Abstract

The structurally enticing antascomicin B (1), which exhibits potent immunosuppressant-antagonizing properties, has a complex polyketide structure. Key steps in its enantioselective total synthesis include a transannular catechol-templated Dieckmann reaction to assemble the challenging tricarbonyl functionality and a butanediacetal-directed allylation.