Abstract
Two convergent total syntheses of the ansa-polyketide (-)-kendomycin (1) are described. The syntheses benefit from the use of readily available and cheap starting materials. Highly complex diastereoselective Claisen-Ireland rearrangements were used to introduce the (E)-double bond and the C16-Me group. The ring closure of the strained ansa macrocycle was achieved by ring-closing metathesis and a highly efficient combination of macrolactonization and photo-Fries reaction. A protecting group free endgame via an unstable o-quinone is presented. Additionally some unsuccessful synthetic efforts towards the total synthesis of 1 are described.
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