Ring-Closing Metathesis and Photo-Fries Reaction for the Construction of the Ansamycin Antibiotic Kendomycin: Development of a Protecting Group Free Oxidative Endgame
作者:Thomas Magauer、Harryâ J. Martin、Johann Mulzer
DOI:10.1002/chem.200902226
日期:2010.1.11
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