The C15–C27 portion of venturicidin X was prepared using substitution reactions of alkyl trifluoromethanesulfonates with a vinylmetal compound followed by homogeneous hydrogenation. Together with our previous synthesis of the C1–C14 portion of venturicidin X, a formal totalsynthesis of venturicidin X was completed.
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.