A convergent total synthesis of epothilone A (1) is described. The key step
s are diastereoselective aldol condensation Of aldehyde 3 to form the C-6 C
-7 bond: macrolactonization and Wadsworth-Emmons reaction of methyl ketone
with phosphonate reagent 5. (C) 2001 Elsevier Science Ltd. All rights reser
ved.