Progressive−Convergent Elucidation of Stereochemistry in Complex Polyols. The Absolute Configuration of (−)-Sagittamide A

Abstract
The absolute stereostructure of sagittamide A (1), a O-hexacetyl long-chain hexahydroxy-α,ω-dicarboxylic acid, was assigned using a progressive−convergent approach that integrates three powerful regimens for stereochemical analysis of acyclic natural products: J-based analysis, 13C NMR universal database comparisons, and exciton coupling circular dichroism.