The effective syntheses of the C5 similar to C11 (2), C12 similar to C17 (3) and C18 similar to C25 (4) segments, which are promising synthetic intermediates toward the total synthesis of the macrolide antibiotic, bafilomycin A(1) (1), were described.
The highly stereoselective totalsynthesis of the macrolide antibiotic, bafilomycin A(1) (1), the first specific potent inhibitor of vacuolar H(+)-ATPase, has been achieved by a convergent route involving the synthesis and coupling of its 16-membered tetraenic lactone and beta-hydroxyl hemiacetal side-chain subunits. The C1-C17 16-membered lactone aldehyde 2 was synthesized through the coupling of